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syn68k/runtime/native/i386/i386-aux.c

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Syn68k from an svn export
2008-09-26 14:25:10 +00:00
#include "syn68k_private.h"
#ifdef GENERATE_NATIVE_CODE
#include "native.h"
#include "i386-isa.h"
#include "i386-aux.h"
#include "hash.h"
#include "trap.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef DEBUG
#define CHECK_ADDR_REG(n) \
assert (c->host_reg_to_guest_reg[n] == NO_REG \
|| (c->host_reg_to_guest_reg[n] >= 8 \
&& c->host_reg_to_guest_reg[n] < 16))
#else
#define CHECK_ADDR_REG(n)
#endif
#ifndef offsetof
#define offsetof(t, f) ((int32) &(((t *) 0)->f))
#endif
#define HOST_TEST_REG(size) \
int \
host_test ## size ## _reg (COMMON_ARGS, int32 reg) \
{ \
i386_test ## size ## _reg_reg (COMMON_ARG_NAMES, reg, reg); \
return 0; \
}
HOST_TEST_REG (b)
HOST_TEST_REG (l)
int
host_testw_reg (COMMON_ARGS, int32 reg)
{
/* Word ops are slow on the i386, so do a testb if we can;
* if we don't need Z, testw %ax,%ax -> testb %ah,%ah.
*/
if (!(cc_to_compute & M68K_CCZ) && reg < 4)
i386_testb_reg_reg (COMMON_ARG_NAMES, reg + 4, reg + 4);
else
i386_testw_reg_reg (COMMON_ARG_NAMES, reg, reg);
return 0;
}
/* Tests a swapped register. The register is assumed to be SWAP16 for word
* tests and SWAP32 for long tests.
*/
#define HOST_TEST_SWAPPED_REG(size, swap, save, restore) \
int \
host_test ## size ## _swapped_reg (COMMON_ARGS, int32 reg) \
{ \
if (!(cc_to_compute & M68K_CCZ) && reg < 4) \
i386_testb_reg_reg (COMMON_ARG_NAMES, reg, reg); \
else if (!(cc_to_compute & M68K_CCN)) \
i386_test ## size ## _reg_reg (COMMON_ARG_NAMES, reg, reg); \
else \
{ \
save; \
swap (COMMON_ARG_NAMES, reg); \
i386_test ## size ## _reg_reg (COMMON_ARG_NAMES, reg, reg); \
restore; \
} \
\
return 0; \
}
HOST_TEST_SWAPPED_REG (w, host_swap16,
i386_pushl (COMMON_ARG_NAMES, reg),
i386_popl (COMMON_ARG_NAMES, reg))
HOST_TEST_SWAPPED_REG (l, host_swap32,
if (!have_i486_p)
i386_pushl (COMMON_ARG_NAMES, reg),
(have_i486_p ? i386_bswap (COMMON_ARG_NAMES, reg)
: i386_popl (COMMON_ARG_NAMES, reg)))
/* This is used when we need to sign extend a SWAP16 address register
* and possible compute cc bits. This happens often when we
* do movew _addr,a0...m68k semantics demand sign extension.
*/
int
host_swap16_sext_test_reg (COMMON_ARGS, int32 reg)
{
HOST_SWAP16 (reg);
i386_movswl_reg_reg (COMMON_ARG_NAMES, reg, reg);
if (cc_to_compute)
i386_testl_reg_reg (COMMON_ARG_NAMES, reg, reg);
return 0;
}
/* A special handler for adding, subtracting, or comparing two registers.
* The problem is that we can get into situations like:
* cmpl a0@-,a0
* where a0 becomes offset after the instruction starts. This
* will properly handle offset registers (by unoffsetting them before
* the compare).
*/
#define ADD_SUB_CMP_OFFSET(op) \
int \
host_ ## op ## l_reg_reg (COMMON_ARGS, int32 reg1, int32 reg2) \
{ \
int32 gr1, gr2; \
\
gr1 = c->host_reg_to_guest_reg[reg1]; \
if (gr1 != NO_REG) \
host_unoffset_reg (c, codep, cc_spill_if_changed, gr1); \
\
gr2 = c->host_reg_to_guest_reg[reg2]; \
if (gr2 != NO_REG) \
host_unoffset_reg (c, codep, cc_spill_if_changed, gr2); \
\
return i386_ ## op ## l_reg_reg (COMMON_ARG_NAMES, reg1, reg2); \
}
ADD_SUB_CMP_OFFSET (add)
ADD_SUB_CMP_OFFSET (sub)
ADD_SUB_CMP_OFFSET (cmp)
/* This performs a binary bitwise op on a register when you are
* either doing a byte sized op, or you don't care about the N bit.
* This can only handle SWAP32 for long sized ops.
*/
#define HOST_BITWISE_IMM_REG(op, size, mask, size_mask, byte_p) \
int \
host_ ## op ## size ## _imm_reg (COMMON_ARGS, int32 val, int32 reg) \
{ \
int guest_reg = c->host_reg_to_guest_reg[reg]; \
\
val = (val & (size_mask)) | (mask); \
\
switch (c->guest_reg_status[guest_reg].mapping) \
{ \
case MAP_NATIVE: \
if (byte_p || (cc_to_compute & (M68K_CCN | M68K_CCZ))) \
i386_ ## op ## size ## _imm_reg (COMMON_ARG_NAMES, val, reg); \
else \
i386_ ## op ## l_imm_reg (COMMON_ARG_NAMES, val | (mask), reg); \
break; \
case MAP_SWAP16: \
/* andb $12,%ah instead of andb $12,%al? Since we're doing \
* a byte op we know we must have a byte reg. \
*/ \
if (byte_p) \
i386_ ## op ## b_imm_reg (COMMON_ARG_NAMES, val, reg + 4); \
else if (cc_to_compute & (M68K_CCN | M68K_CCZ)) \
i386_ ## op ## size ## _imm_reg (COMMON_ARG_NAMES, \
(SWAPUW_IFLE (val) \
| (val & 0xFFFF0000)), \
reg); \
else \
i386_ ## op ## l_imm_reg (COMMON_ARG_NAMES, \
(SWAPUW_IFLE (val) \
| (val & 0xFFFF0000)), \
reg); \
break; \
case MAP_SWAP32: \
if (cc_to_compute & (M68K_CCN | M68K_CCZ)) \
{ \
if (byte_p) \
return 1; /* Can't easily get it. */ \
i386_ ## op ## size ## _imm_reg (COMMON_ARG_NAMES, \
SWAPUL_IFLE (val), reg); \
} \
else \
i386_ ## op ## l_imm_reg (COMMON_ARG_NAMES, \
SWAPUL_IFLE (val), reg); \
break; \
default: \
abort (); \
} \
\
c->guest_reg_status[guest_reg].dirty_without_offset_p = TRUE; \
\
return 0; \
}
HOST_BITWISE_IMM_REG (and, b, 0xFFFFFF00, 0x000000FF, TRUE)
HOST_BITWISE_IMM_REG (and, w, 0xFFFF0000, 0x0000FFFF, FALSE)
HOST_BITWISE_IMM_REG (and, l, 0x00000000, 0xFFFFFFFF, FALSE)
HOST_BITWISE_IMM_REG (or, b, 0, 0x000000FF, TRUE)
HOST_BITWISE_IMM_REG (or, w, 0, 0x0000FFFF, FALSE)
HOST_BITWISE_IMM_REG (or, l, 0, 0xFFFFFFFF, FALSE)
HOST_BITWISE_IMM_REG (xor, b, 0, 0x000000FF, TRUE)
HOST_BITWISE_IMM_REG (xor, w, 0, 0x0000FFFF, FALSE)
HOST_BITWISE_IMM_REG (xor, l, 0, 0xFFFFFFFF, FALSE)
#define HOST_BITWISE_IMM_ABS(op, size, swapfunc) \
int \
host_ ## op ## size ## _imm_abs (COMMON_ARGS, int32 val, int32 addr) \
{ \
/* Only guaranteed to compute CVZ carry bits; N will of course be \
* botched. For cmp this only computes Z correctly. \
*/ \
return i386_ ## op ## size ## _imm_abs (COMMON_ARG_NAMES, swapfunc (val), \
(int32) SYN68K_TO_US (addr)); \
}
HOST_BITWISE_IMM_ABS (and, w, SWAPUW)
HOST_BITWISE_IMM_ABS (and, l, SWAPUL)
HOST_BITWISE_IMM_ABS (or, w, SWAPUW)
HOST_BITWISE_IMM_ABS (or, l, SWAPUL)
HOST_BITWISE_IMM_ABS (xor, w, SWAPUW)
HOST_BITWISE_IMM_ABS (xor, l, SWAPUL)
HOST_BITWISE_IMM_ABS (cmp, w, SWAPUW)
HOST_BITWISE_IMM_ABS (cmp, l, SWAPUL)
#define HOST_BITWISE_IMM_MEM(size, op, amode, swapfunc, preoff, postoff, \
adjust_p) \
int \
host_ ## op ## size ## _imm_ ## amode (COMMON_ARGS, int32 val, OFF int32 reg)\
{ \
int32 regoff; \
int offset_p; \
int guest_reg = c->host_reg_to_guest_reg[reg]; \
\
CHECK_ADDR_REG (reg); \
\
/* Compensate for a7 predec/postinc byte size means +-2 nonsense. */ \
if (adjust_p && ((preoff) & 1) && guest_reg == 15) /* a7? */ \
regoff = (preoff) * 2; \
else \
regoff = preoff; \
\
offset_p = (c->guest_reg_status[guest_reg].mapping == MAP_OFFSET); \
if (offset_p) \
regoff += c->guest_reg_status[guest_reg].offset; \
\
/* Compensate for offset memory. */ \
regoff = (int32) SYN68K_TO_US (regoff); \
\
/* Actually perform the operation. */ \
if (regoff == 0) \
i386_ ## op ## size ## _imm_ind (COMMON_ARG_NAMES, \
swapfunc (val), reg); \
else \
i386_ ## op ## size ## _imm_indoff (COMMON_ARG_NAMES, swapfunc (val), \
regoff, reg); \
/* Adjust the address register. */ \
if (postoff && adjust_p) \
{ \
int32 newoff; \
\
if (((postoff) & 1) && guest_reg == 15) /* a7? Compensate... */ \
newoff = (postoff) * 2; \
else \
newoff = postoff; \
\
if (offset_p) \
{ \
/* If we're already offset, adjust our offset some more. */ \
if ((c->guest_reg_status[guest_reg].offset += newoff) == 0) \
c->guest_reg_status[guest_reg].mapping = MAP_NATIVE; \
} \
else \
{ \
/* We now become offset from our original value. */ \
c->guest_reg_status[guest_reg].offset = newoff; \
c->guest_reg_status[guest_reg].mapping = MAP_OFFSET; \
} \
} \
\
return 0; \
}
#undef OFF
#define OFF
HOST_BITWISE_IMM_MEM(b, and, ind, SWAPUB, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, and, ind, SWAPUW, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, and, ind, SWAPUL, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, or, ind, SWAPUB, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, or, ind, SWAPUW, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, or, ind, SWAPUL, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, xor, ind, SWAPUB, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, xor, ind, SWAPUW, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, xor, ind, SWAPUL, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, add, ind, SWAPUB, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, sub, ind, SWAPUB, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, cmp, ind, SWAPUB, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, cmp, ind, SWAPUW, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, cmp, ind, SWAPUL, 0, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, and, predec, SWAPUB, -1, -1, TRUE)
HOST_BITWISE_IMM_MEM(w, and, predec, SWAPUW, -2, -2, TRUE)
HOST_BITWISE_IMM_MEM(l, and, predec, SWAPUL, -4, -4, TRUE)
HOST_BITWISE_IMM_MEM(b, or, predec, SWAPUB, -1, -1, TRUE)
HOST_BITWISE_IMM_MEM(w, or, predec, SWAPUW, -2, -2, TRUE)
HOST_BITWISE_IMM_MEM(l, or, predec, SWAPUL, -4, -4, TRUE)
HOST_BITWISE_IMM_MEM(b, xor, predec, SWAPUB, -1, -1, TRUE)
HOST_BITWISE_IMM_MEM(w, xor, predec, SWAPUW, -2, -2, TRUE)
HOST_BITWISE_IMM_MEM(l, xor, predec, SWAPUL, -4, -4, TRUE)
HOST_BITWISE_IMM_MEM(b, add, predec, SWAPUB, -1, -1, TRUE)
HOST_BITWISE_IMM_MEM(b, sub, predec, SWAPUB, -1, -1, TRUE)
HOST_BITWISE_IMM_MEM(b, cmp, predec, SWAPUB, -1, -1, TRUE)
HOST_BITWISE_IMM_MEM(w, cmp, predec, SWAPUW, -2, -2, TRUE)
HOST_BITWISE_IMM_MEM(l, cmp, predec, SWAPUL, -4, -4, TRUE)
HOST_BITWISE_IMM_MEM(b, and, postinc, SWAPUB, 0, 1, TRUE)
HOST_BITWISE_IMM_MEM(w, and, postinc, SWAPUW, 0, 2, TRUE)
HOST_BITWISE_IMM_MEM(l, and, postinc, SWAPUL, 0, 4, TRUE)
HOST_BITWISE_IMM_MEM(b, or, postinc, SWAPUB, 0, 1, TRUE)
HOST_BITWISE_IMM_MEM(w, or, postinc, SWAPUW, 0, 2, TRUE)
HOST_BITWISE_IMM_MEM(l, or, postinc, SWAPUL, 0, 4, TRUE)
HOST_BITWISE_IMM_MEM(b, xor, postinc, SWAPUB, 0, 1, TRUE)
HOST_BITWISE_IMM_MEM(w, xor, postinc, SWAPUW, 0, 2, TRUE)
HOST_BITWISE_IMM_MEM(l, xor, postinc, SWAPUL, 0, 4, TRUE)
HOST_BITWISE_IMM_MEM(b, add, postinc, SWAPUB, 0, 1, TRUE)
HOST_BITWISE_IMM_MEM(b, sub, postinc, SWAPUB, 0, 1, TRUE)
HOST_BITWISE_IMM_MEM(b, cmp, postinc, SWAPUB, 0, 1, TRUE)
HOST_BITWISE_IMM_MEM(w, cmp, postinc, SWAPUW, 0, 2, TRUE)
HOST_BITWISE_IMM_MEM(l, cmp, postinc, SWAPUL, 0, 4, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_BITWISE_IMM_MEM(b, and, indoff, SWAPUB, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, and, indoff, SWAPUW, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, and, indoff, SWAPUL, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, or, indoff, SWAPUB, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, or, indoff, SWAPUW, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, or, indoff, SWAPUL, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, xor, indoff, SWAPUB, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, xor, indoff, SWAPUW, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, xor, indoff, SWAPUL, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, add, indoff, SWAPUB, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, sub, indoff, SWAPUB, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(b, cmp, indoff, SWAPUB, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(w, cmp, indoff, SWAPUW, offset, 0, FALSE)
HOST_BITWISE_IMM_MEM(l, cmp, indoff, SWAPUL, offset, 0, FALSE)
#define HOST_UNARY_MEM(size, op, amode, swapfunc, preoff, postoff, adjust_p) \
int \
host_ ## op ## size ## _ ## amode (COMMON_ARGS, OFF int32 reg) \
{ \
int32 regoff; \
int offset_p; \
int guest_reg = c->host_reg_to_guest_reg[reg]; \
\
CHECK_ADDR_REG (reg); \
\
/* Compensate for a7 predec/postinc byte size means +-2 nonsense. */ \
if (adjust_p && ((preoff) & 1) && guest_reg == 15) /* a7? */ \
regoff = (preoff) * 2; \
else \
regoff = preoff; \
\
offset_p = (c->guest_reg_status[guest_reg].mapping == MAP_OFFSET); \
if (offset_p) \
regoff += c->guest_reg_status[guest_reg].offset; \
\
/* Compensate for offset memory. */ \
regoff = (int32) SYN68K_TO_US (regoff); \
\
/* Actually perform the operation. */ \
if (regoff == 0) \
i386_ ## op ## size ## _ind (COMMON_ARG_NAMES, reg); \
else \
i386_ ## op ## size ## _indoff (COMMON_ARG_NAMES, regoff, reg); \
/* Adjust the address register. */ \
if (postoff && adjust_p) \
{ \
int32 newoff; \
\
if (((postoff) & 1) && guest_reg == 15) /* a7? Compensate... */ \
newoff = (postoff) * 2; \
else \
newoff = postoff; \
\
if (offset_p) \
{ \
/* If we're already offset, adjust our offset some more. */ \
if ((c->guest_reg_status[guest_reg].offset += newoff) == 0) \
c->guest_reg_status[guest_reg].mapping = MAP_NATIVE; \
} \
else \
{ \
/* We now become offset from our original value. */ \
c->guest_reg_status[guest_reg].offset = newoff; \
c->guest_reg_status[guest_reg].mapping = MAP_OFFSET; \
} \
} \
\
return 0; \
}
#undef OFF
#define OFF
HOST_UNARY_MEM(b, neg, ind, SWAPUB, 0, 0, FALSE)
HOST_UNARY_MEM(b, neg, predec, SWAPUB, -1, -1, TRUE)
HOST_UNARY_MEM(b, neg, postinc, SWAPUB, 0, 1, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_UNARY_MEM(b, neg, indoff, SWAPUB, offset, 0, FALSE)
static inline void
test_imm (COMMON_ARGS, int32 val, uint32 size_mask)
{
/* Write out all four cc bits at once. */
i386_movl_imm_indoff (COMMON_ARG_NAMES,
((val != 0)
| ((val & (size_mask ^ (size_mask >> 1)))
? 0x100 : 0)),
offsetof (CPUState, ccnz), REG_EBP);
c->cached_cc &= ~cc_to_compute;
c->dirty_cc &= ~cc_to_compute;
}
#define HOST_MOV_IMM_REG(size, size_mask) \
int \
host_move ## size ## _imm_reg (COMMON_ARGS, int32 val, int32 reg) \
{ \
if (val == 0 && (!cc_spill_if_changed || cc_to_compute)) \
{ \
i386_xor ## size ## _reg_reg (COMMON_ARG_NAMES, reg, reg); \
if (cc_to_compute) \
{ \
test_imm (COMMON_ARG_NAMES, 0, size_mask); \
c->cached_cc |= cc_to_compute; /* xor cached them. */ \
} \
} \
else \
{ \
i386_mov ## size ## _imm_reg (COMMON_ARG_NAMES, val, reg); \
if (cc_to_compute) \
test_imm (COMMON_ARG_NAMES, val, size_mask); \
} \
return 0; \
}
HOST_MOV_IMM_REG (b, 0xFF)
HOST_MOV_IMM_REG (w, 0xFFFF)
HOST_MOV_IMM_REG (l, 0xFFFFFFFF)
#define HOST_MOV_IMM_ABS(size, swapfunc, size_mask) \
int \
host_move ## size ## _imm_abs (COMMON_ARGS, int32 val, int32 addr) \
{ \
if (cc_to_compute) \
test_imm (COMMON_ARG_NAMES, val, size_mask); \
i386_mov ## size ## _imm_abs (COMMON_ARG_NAMES, swapfunc (val), \
(int32) SYN68K_TO_US (addr)); \
return 0; \
}
HOST_MOV_IMM_ABS (b, SWAPUB, 0xFF)
HOST_MOV_IMM_ABS (w, SWAPUW, 0xFFFF)
HOST_MOV_IMM_ABS (l, SWAPUL, 0xFFFFFFFF)
#define HOST_MOV_REG_ABS_SWAP(size, swap) \
int \
host_move ## size ## _reg_abs_swap (COMMON_ARGS, int32 src_reg, int32 addr) \
{ \
cc_spill_if_changed |= cc_to_compute; \
swap (src_reg); \
return i386_mov ## size ## _reg_abs (COMMON_ARG_NAMES, src_reg, \
(int32) SYN68K_TO_US (addr)); \
}
HOST_MOV_REG_ABS_SWAP (w, HOST_SWAP16)
HOST_MOV_REG_ABS_SWAP (l, HOST_SWAP32)
#define HOST_MOV_ABS_REG_SWAP(size, swap, long_p) \
int \
host_move ## size ## _abs_reg_swap (COMMON_ARGS, int32 addr, int32 dst_reg) \
{ \
i386_mov ## size ## _abs_reg (COMMON_ARG_NAMES, \
(int32) SYN68K_TO_US (addr), \
dst_reg); \
swap (dst_reg); \
return 0; \
}
HOST_MOV_ABS_REG_SWAP (w, HOST_SWAP16, FALSE)
HOST_MOV_ABS_REG_SWAP (l, HOST_SWAP32, TRUE)
#define HOST_MOV_IMM_MEM(size, amode, swapfunc, preoff, postoff, adjust_p, \
size_mask) \
int \
host_move ## size ## _imm_ ## amode (COMMON_ARGS, int32 val, OFF int32 reg) \
{ \
int32 regoff; \
int offset_p; \
int guest_reg = c->host_reg_to_guest_reg[reg]; \
\
CHECK_ADDR_REG (reg); \
\
/* Compensate for a7 predec/postinc byte size means +-2 nonsense. */ \
if (adjust_p && ((preoff) & 1) && guest_reg == 15) /* a7? */ \
regoff = (preoff) * 2; \
else \
regoff = preoff; \
\
offset_p = (c->guest_reg_status[guest_reg].mapping == MAP_OFFSET); \
if (offset_p) \
regoff += c->guest_reg_status[guest_reg].offset; \
\
/* Compensate for offset memory. */ \
regoff = (int32) SYN68K_TO_US (regoff); \
\
/* Set cc bits according to this value, if necessary. */ \
if (cc_to_compute) \
{ \
test_imm (COMMON_ARG_NAMES, val, size_mask); \
cc_to_compute = M68K_CC_NONE; \
} \
\
/* Actually write the value out to memory. */ \
if (regoff == 0) \
i386_mov ## size ## _imm_ind (COMMON_ARG_NAMES, \
swapfunc (val), reg); \
else \
i386_mov ## size ## _imm_indoff (COMMON_ARG_NAMES, swapfunc (val), \
regoff, reg); \
/* Adjust the address register. */ \
if (postoff && adjust_p) \
{ \
int32 newoff; \
\
if (((postoff) & 1) && guest_reg == 15) /* a7? Compensate... */ \
newoff = (postoff) * 2; \
else \
newoff = postoff; \
\
if (offset_p) \
{ \
/* If we're already offset, adjust our offset some more. */ \
if ((c->guest_reg_status[guest_reg].offset += newoff) == 0) \
c->guest_reg_status[guest_reg].mapping = MAP_NATIVE; \
} \
else \
{ \
/* We now become offset from our original value. */ \
c->guest_reg_status[guest_reg].offset = newoff; \
c->guest_reg_status[guest_reg].mapping = MAP_OFFSET; \
} \
} \
\
return 0; \
}
#undef OFF
#define OFF
HOST_MOV_IMM_MEM(b, ind, SWAPUB, 0, 0, FALSE, 0xFF)
HOST_MOV_IMM_MEM(w, ind, SWAPUW, 0, 0, FALSE, 0xFFFF)
HOST_MOV_IMM_MEM(l, ind, SWAPUL, 0, 0, FALSE, 0xFFFFFFFF)
HOST_MOV_IMM_MEM(b, predec, SWAPUB, -1, -1, TRUE, 0xFF)
HOST_MOV_IMM_MEM(w, predec, SWAPUW, -2, -2, TRUE, 0xFFFF)
HOST_MOV_IMM_MEM(l, predec, SWAPUL, -4, -4, TRUE, 0xFFFFFFFF)
HOST_MOV_IMM_MEM(b, postinc, SWAPUB, 0, 1, TRUE, 0xFF)
HOST_MOV_IMM_MEM(w, postinc, SWAPUW, 0, 2, TRUE, 0xFFFF)
HOST_MOV_IMM_MEM(l, postinc, SWAPUL, 0, 4, TRUE, 0xFFFFFFFF)
#undef OFF
#define OFF int32 offset,
HOST_MOV_IMM_MEM(b, indoff, SWAPUB, offset, 0, FALSE, 0xFF)
HOST_MOV_IMM_MEM(w, indoff, SWAPUW, offset, 0, FALSE, 0xFFFF)
HOST_MOV_IMM_MEM(l, indoff, SWAPUL, offset, 0, FALSE, 0xFFFFFFFF)
#define COMPLEX_P(n) ((n) & (1 << 8))
#define LONG_INDEX_REG_P(n) ((n) & (1 << 11))
#define SCALE(n) (((n) >> 9) & 3)
#define DISPLACEMENT(n) ((int8) ((n) & 0xFF))
#define INDEX_REG(n) (((n) >> 12) & 0xF)
#define HOST_OP_IMM_INDIX(size, name, op, swapfunc, test_imm_p, \
size_mask) \
int \
host_ ## name ## size ## _imm_indix (COMMON_ARGS, int32 val, \
int32 base_addr_reg, \
uint16 *m68k_addr) \
{ \
uint16 ext_word; \
int index_reg, guest_index_reg, orig_index_reg; \
int32 disp; \
guest_reg_status_t *base_status, *index_status; \
\
/* Fetch the extension word and make sure it's a "simple" reference. */ \
ext_word = SWAPUW (m68k_addr[1]); \
if (COMPLEX_P (ext_word)) \
return 2; \
\
/* Set up the index register. */ \
guest_index_reg = INDEX_REG (ext_word); \
index_status = &c->guest_reg_status[guest_index_reg]; \
if (index_status->host_reg == NO_REG \
&& !LONG_INDEX_REG_P (ext_word)) \
{ \
i386_movswl_indoff_reg (COMMON_ARG_NAMES, \
offsetof (CPUState, \
regs[guest_index_reg].sw.n), \
REG_EBP, scratch_reg); \
index_reg = scratch_reg; \
} \
else \
{ \
host_reg_mask_t legal_regs; \
legal_regs = ((~((1L << base_addr_reg) | (1L << scratch_reg))) \
& ((guest_index_reg < 8) \
? REGSET_BYTE : REGSET_ALL)); \
if (c->guest_reg_status[guest_index_reg].host_reg \
== base_addr_reg) \
legal_regs |= (1L << base_addr_reg); \
orig_index_reg = host_setup_cached_reg (COMMON_ARG_NAMES, \
guest_index_reg, \
MAP_NATIVE_MASK, \
legal_regs); \
if (orig_index_reg == NO_REG) \
return 3; \
if (LONG_INDEX_REG_P (ext_word)) \
index_reg = orig_index_reg; \
else \
{ \
i386_movswl_reg_reg (COMMON_ARG_NAMES, orig_index_reg, \
scratch_reg); \
index_reg = scratch_reg; \
} \
} \
\
/* Compute the total displacement. */ \
disp = DISPLACEMENT (ext_word); \
base_status = &c->guest_reg_status \
[c->host_reg_to_guest_reg[base_addr_reg]]; \
if (base_status->mapping == MAP_OFFSET) \
disp += base_status->offset; \
\
/* Compensate for offset memory. */ \
disp = (int32) SYN68K_TO_US (disp); \
\
/* Write the value out. */ \
switch (SCALE (ext_word)) \
{ \
case 0: \
if (disp == 0) \
op ## size ##_imm_indix_no_offset (COMMON_ARG_NAMES, \
swapfunc (val), \
base_addr_reg, index_reg); \
else \
op ## size ##_imm_indix (COMMON_ARG_NAMES, swapfunc (val), \
disp, base_addr_reg, index_reg); \
break; \
case 1: \
if (disp == 0) \
op ## size ##_imm_indix_scale2_no_offset (COMMON_ARG_NAMES, \
swapfunc (val), \
base_addr_reg, \
index_reg); \
else \
op ## size ##_imm_indix_scale2 (COMMON_ARG_NAMES, \
swapfunc (val), \
disp, base_addr_reg, \
index_reg); \
break; \
case 2: \
if (disp == 0) \
op ## size ##_imm_indix_scale4_no_offset (COMMON_ARG_NAMES, \
swapfunc (val), \
base_addr_reg, \
index_reg); \
else \
op ## size ##_imm_indix_scale4 (COMMON_ARG_NAMES, \
swapfunc (val), \
disp, base_addr_reg, \
index_reg); \
break; \
case 3: \
if (disp == 0) \
op ## size ##_imm_indix_scale8_no_offset (COMMON_ARG_NAMES, \
swapfunc (val), \
base_addr_reg, \
index_reg); \
else \
op ## size ##_imm_indix_scale8 (COMMON_ARG_NAMES, \
swapfunc (val), \
disp, base_addr_reg, \
index_reg); \
break; \
default: \
abort (); \
} \
\
/* If we need cc bits, compute them. */ \
if ((test_imm_p) && cc_to_compute) \
test_imm (COMMON_ARG_NAMES, val, size_mask); \
\
return 0; \
}
HOST_OP_IMM_INDIX (b, move, i386_mov, SWAPUB, TRUE, 0xFF)
HOST_OP_IMM_INDIX (w, move, i386_mov, SWAPUW, TRUE, 0xFFFF)
HOST_OP_IMM_INDIX (l, move, i386_mov, SWAPUL, TRUE, 0xFFFFFFFF)
HOST_OP_IMM_INDIX (b, cmp, i386_cmp, SWAPUB, FALSE, 0xFF)
HOST_OP_IMM_INDIX (w, cmp, i386_cmp, SWAPUW, FALSE, 0xFFFF)
HOST_OP_IMM_INDIX (l, cmp, i386_cmp, SWAPUL, FALSE, 0xFFFFFFFF)
HOST_OP_IMM_INDIX (b, add, i386_add, SWAPUB, FALSE, 0xFF)
HOST_OP_IMM_INDIX (b, sub, i386_sub, SWAPUB, FALSE, 0xFF)
#define HOST_ARITH_IMM_INDIX(size, name, op, swapfunc, byte_p, word_p) \
int \
host_ ## name ## size ## _imm_indix (COMMON_ARGS, int32 val, \
int32 base_addr_reg, \
uint16 *m68k_addr) \
{ \
uint16 ext_word; \
int tmp_val_reg; \
\
/* Fetch the extension word and make sure it's a "simple" reference. */ \
ext_word = SWAPUW (m68k_addr[1]); \
if (COMPLEX_P (ext_word)) \
return 1; \
\
if (host_leal_indix_reg (COMMON_ARG_NAMES, base_addr_reg, \
scratch_reg, m68k_addr)) \
return 2; \
\
/* Grab a temporary register to hold the memory value. */ \
tmp_val_reg = host_alloc_reg (c, codep, cc_spill_if_changed, \
((byte_p ? REGSET_BYTE : REGSET_ALL) \
& ~(1L << scratch_reg))); \
if (tmp_val_reg == NO_REG) \
return 3; \
\
/* We've now got the address of the value in scratch_reg. Load the \
* value, swap it, operate on it, swap it back, and write it out \
* to memory. \
*/ \
i386_mov ## size ## _indoff_reg (COMMON_ARG_NAMES, \
(int32) SYN68K_TO_US (0), \
scratch_reg, tmp_val_reg); \
swapfunc (tmp_val_reg); \
if (word_p && !cc_to_compute) \
op ## size ## _imm_reg (COMMON_ARG_NAMES, val, tmp_val_reg); \
else \
op ## size ## _imm_reg (COMMON_ARG_NAMES, val, tmp_val_reg); \
cc_spill_if_changed |= cc_to_compute; \
swapfunc (tmp_val_reg); \
i386_mov ## size ## _reg_indoff (COMMON_ARG_NAMES, tmp_val_reg, \
(int32) SYN68K_TO_US (0), scratch_reg); \
\
return 0; \
}
HOST_ARITH_IMM_INDIX (w, add, i386_add, HOST_SWAP16, FALSE, TRUE)
HOST_ARITH_IMM_INDIX (l, add, i386_add, HOST_SWAP32, FALSE, FALSE)
HOST_ARITH_IMM_INDIX (w, sub, i386_sub, HOST_SWAP16, FALSE, TRUE)
HOST_ARITH_IMM_INDIX (l, sub, i386_sub, HOST_SWAP32, FALSE, FALSE)
#define HOST_OP_REG_INDIX(size, name, op, swapfunc, test_src_p, byte_p) \
int \
host_ ## name ## size ## _reg_indix (COMMON_ARGS, int32 src_reg, \
int32 base_addr_reg, \
uint16 *m68k_addr) \
{ \
uint16 ext_word; \
int index_reg, guest_index_reg, orig_index_reg; \
int32 disp; \
guest_reg_status_t *base_status; \
\
/* Fetch the extension word and make sure it's a "simple" reference. */ \
ext_word = SWAPUW (m68k_addr[1]); \
if (COMPLEX_P (ext_word)) \
return 1; \
\
/* Sometimes we need another scratch register, like for \
* memory->memory moves. This works around that problem by \
* allocating another one if the source reg is the scratch reg. \
*/ \
if (src_reg == scratch_reg) \
{ \
host_reg_mask_t scratch_regs; \
scratch_regs = ((~((1L << base_addr_reg) | (1L << scratch_reg) \
| (1L << src_reg))) \
& REGSET_ALL); \
scratch_reg = host_alloc_reg (c, codep, cc_spill_if_changed, \
scratch_regs); \
if (scratch_reg == NO_REG) \
return 6; \
} \
\
/* Set up the index register. */ \
guest_index_reg = INDEX_REG (ext_word); \
if (c->guest_reg_status[guest_index_reg].host_reg == NO_REG \
&& !LONG_INDEX_REG_P (ext_word)) \
{ \
i386_movswl_indoff_reg (COMMON_ARG_NAMES, \
offsetof (CPUState, \
regs[guest_index_reg].sw.n), \
REG_EBP, scratch_reg); \
index_reg = scratch_reg; \
} \
else \
{ \
int host_index_reg; \
host_reg_mask_t legal_regs; \
\
legal_regs = ((~((1L << base_addr_reg) | (1L << scratch_reg) \
| (1L << src_reg))) \
& ((guest_index_reg < 8) \
? REGSET_BYTE : REGSET_ALL)); \
host_index_reg = c->guest_reg_status[guest_index_reg].host_reg; \
if (host_index_reg == base_addr_reg \
|| (byte_p && host_index_reg == src_reg)) \
legal_regs |= (1L << host_index_reg); \
if (host_index_reg == src_reg) \
{ \
i386_movl_reg_reg (COMMON_ARG_NAMES, src_reg, scratch_reg); \
swapfunc (scratch_reg); \
host_index_reg = orig_index_reg = scratch_reg; \
} \
else \
{ \
if (host_index_reg != NO_REG \
&& !(legal_regs & (1L << host_index_reg))) \
return 5; \
orig_index_reg = host_setup_cached_reg (COMMON_ARG_NAMES, \
guest_index_reg, \
MAP_NATIVE_MASK, \
legal_regs); \
if (orig_index_reg == NO_REG) \
return 3; \
} \
if (LONG_INDEX_REG_P (ext_word)) \
index_reg = orig_index_reg; \
else \
{ \
i386_movswl_reg_reg (COMMON_ARG_NAMES, orig_index_reg, \
scratch_reg); \
index_reg = scratch_reg; \
} \
} \
\
/* Compute the total displacement. */ \
disp = DISPLACEMENT (ext_word); \
base_status = &c->guest_reg_status \
[c->host_reg_to_guest_reg[base_addr_reg]]; \
if (base_status->mapping == MAP_OFFSET) \
disp += base_status->offset; \
\
/* Compensate for offset memory. */ \
disp = (int32) SYN68K_TO_US (disp); \
\
/* Write the value out. */ \
switch (SCALE (ext_word)) \
{ \
case 0: \
if (disp == 0) \
op ## size ##_reg_indix_no_offset (COMMON_ARG_NAMES, \
src_reg, \
base_addr_reg, index_reg); \
else \
op ## size ##_reg_indix (COMMON_ARG_NAMES, src_reg, \
disp, base_addr_reg, index_reg); \
break; \
case 1: \
if (disp == 0) \
op ## size ##_reg_indix_scale2_no_offset (COMMON_ARG_NAMES, \
src_reg, \
base_addr_reg, \
index_reg); \
else \
op ## size ##_reg_indix_scale2 (COMMON_ARG_NAMES, \
src_reg, \
disp, base_addr_reg, \
index_reg); \
break; \
case 2: \
if (disp == 0) \
op ## size ##_reg_indix_scale4_no_offset (COMMON_ARG_NAMES, \
src_reg, \
base_addr_reg, \
index_reg); \
else \
op ## size ##_reg_indix_scale4 (COMMON_ARG_NAMES, \
src_reg, \
disp, base_addr_reg, \
index_reg); \
break; \
case 3: \
if (disp == 0) \
op ## size ##_reg_indix_scale8_no_offset (COMMON_ARG_NAMES, \
src_reg, \
base_addr_reg, \
index_reg); \
else \
op ## size ##_reg_indix_scale8 (COMMON_ARG_NAMES, \
src_reg, \
disp, base_addr_reg, \
index_reg); \
break; \
default: \
abort (); \
} \
\
/* If we need cc bits, compute them. */ \
if ((test_src_p) && cc_to_compute) \
{ \
if ((byte_p) || !(cc_to_compute & M68K_CCN)) \
i386_test ## size ## _reg_reg (COMMON_ARG_NAMES, src_reg, \
src_reg); \
else \
{ \
i386_movl_reg_reg (COMMON_ARG_NAMES, src_reg, scratch_reg); \
swapfunc (scratch_reg); \
i386_test ## size ## _reg_reg (COMMON_ARG_NAMES, \
scratch_reg, scratch_reg); \
} \
} \
\
return 0; \
}
#define NOSWAP(n)
HOST_OP_REG_INDIX (b, move, i386_mov, NOSWAP, TRUE, TRUE)
HOST_OP_REG_INDIX (w, move, i386_mov, HOST_SWAP16, TRUE, FALSE)
HOST_OP_REG_INDIX (l, move, i386_mov, HOST_SWAP32, TRUE, FALSE)
#define HOST_OP_INDIX_REG(size, name, op, long_p, cmp_p, lea_p) \
int \
host_ ## name ## size ## _indix_reg (COMMON_ARGS, int32 base_addr_reg, \
int32 dst_reg, \
uint16 *m68k_addr) \
{ \
uint16 ext_word; \
int index_reg, guest_index_reg, orig_index_reg; \
int32 disp; \
guest_reg_status_t *base_status; \
\
/* Fetch the extension word and make sure it's a "simple" reference. */ \
ext_word = SWAPUW (m68k_addr[1]); \
if (COMPLEX_P (ext_word)) \
return 1; \
\
/* Set up the index register. */ \
guest_index_reg = INDEX_REG (ext_word); \
if (c->guest_reg_status[guest_index_reg].host_reg == NO_REG) \
{ \
if (LONG_INDEX_REG_P (ext_word)) \
i386_movl_indoff_reg (COMMON_ARG_NAMES, \
offsetof (CPUState, \
regs[guest_index_reg].ul.n), \
REG_EBP, scratch_reg); \
else \
i386_movswl_indoff_reg (COMMON_ARG_NAMES, \
offsetof (CPUState, \
regs[guest_index_reg].sw.n), \
REG_EBP, scratch_reg); \
index_reg = scratch_reg; \
} \
else \
{ \
host_reg_mask_t legal_regs; \
int host_index_reg; \
legal_regs = ((~((1L << base_addr_reg) | (1L << scratch_reg) \
| (1L << dst_reg))) \
& ((guest_index_reg < 8) \
? REGSET_BYTE : REGSET_ALL)); \
host_index_reg = c->guest_reg_status[guest_index_reg].host_reg; \
if (host_index_reg == base_addr_reg \
|| (!cmp_p && host_index_reg == dst_reg)) \
legal_regs |= (1L << host_index_reg); \
if (cmp_p) \
legal_regs &= ~(1L << dst_reg); \
if (host_index_reg != NO_REG \
&& !(legal_regs & (1L << host_index_reg))) \
return 5; \
\
/* When moving a long, the dest register's old value might be \
* invalid (since we are about to smash it). If that register \
* is also the index register, we don't want to trust the junk \
* that's in it. To be safe, reload the value. \
*/ \
if (long_p && !cmp_p && host_index_reg == dst_reg \
&& !c->guest_reg_status[guest_index_reg].dirty_without_offset_p \
&& c->guest_reg_status[guest_index_reg].mapping == MAP_NATIVE) \
{ \
i386_movl_indoff_reg (COMMON_ARG_NAMES, \
offsetof (CPUState, \
regs[guest_index_reg].ul.n), \
REG_EBP, host_index_reg); \
orig_index_reg = host_index_reg; \
} \
else \
orig_index_reg = host_setup_cached_reg (COMMON_ARG_NAMES, \
guest_index_reg, \
MAP_NATIVE_MASK, \
legal_regs); \
\
if (orig_index_reg == NO_REG) \
return 2; \
if (LONG_INDEX_REG_P (ext_word)) \
index_reg = orig_index_reg; \
else \
{ \
i386_movswl_reg_reg (COMMON_ARG_NAMES, orig_index_reg, \
scratch_reg); \
index_reg = scratch_reg; \
} \
} \
\
/* Compute the total displacement. */ \
disp = DISPLACEMENT (ext_word); \
base_status = &c->guest_reg_status \
[c->host_reg_to_guest_reg[base_addr_reg]]; \
if (base_status->mapping == MAP_OFFSET) \
disp += base_status->offset; \
\
/* Compensate for offset memory. */ \
if (!(lea_p)) \
disp = (int32) SYN68K_TO_US (disp); \
\
/* Write the value out. */ \
switch (SCALE (ext_word)) \
{ \
case 0: \
if (disp == 0) \
op ## size ##_indix_reg_no_offset (COMMON_ARG_NAMES, \
base_addr_reg, index_reg, \
dst_reg); \
else \
op ## size ##_indix_reg (COMMON_ARG_NAMES, \
disp, base_addr_reg, index_reg, \
dst_reg); \
break; \
case 1: \
if (disp == 0) \
op ## size ##_indix_reg_scale2_no_offset (COMMON_ARG_NAMES, \
base_addr_reg, \
index_reg, \
dst_reg); \
else \
op ## size ##_indix_reg_scale2 (COMMON_ARG_NAMES, \
disp, base_addr_reg, index_reg, \
dst_reg); \
break; \
case 2: \
if (disp == 0) \
op ## size ##_indix_reg_scale4_no_offset (COMMON_ARG_NAMES, \
base_addr_reg, \
index_reg, \
dst_reg); \
else \
op ## size ##_indix_reg_scale4 (COMMON_ARG_NAMES, \
disp, base_addr_reg, \
index_reg, \
dst_reg); \
break; \
case 3: \
if (disp == 0) \
op ## size ##_indix_reg_scale8_no_offset (COMMON_ARG_NAMES, \
base_addr_reg, \
index_reg, \
dst_reg); \
else \
op ## size ##_indix_reg_scale8 (COMMON_ARG_NAMES, \
disp, base_addr_reg, \
index_reg, \
dst_reg); \
break; \
default: \
abort (); \
} \
\
return 0; \
}
HOST_OP_INDIX_REG (b, move, i386_mov, FALSE, FALSE, FALSE)
HOST_OP_INDIX_REG (w, move, i386_mov, FALSE, FALSE, FALSE)
HOST_OP_INDIX_REG (l, move, i386_mov, TRUE, FALSE, FALSE)
HOST_OP_INDIX_REG (b, cmp, i386_cmp, FALSE, TRUE, FALSE)
HOST_OP_INDIX_REG (w, cmp, i386_cmp, FALSE, TRUE, FALSE)
HOST_OP_INDIX_REG (l, cmp, i386_cmp, TRUE, TRUE, FALSE)
HOST_OP_INDIX_REG (l, lea, i386_lea, TRUE, FALSE, TRUE)
#define HOST_MOV_REG_MEM(size, amode, preoff, postoff, adjust_p) \
int \
host_move ## size ## _reg_ ## amode (COMMON_ARGS, int32 src_reg, \
OFF int32 dst_addr_reg) \
{ \
int32 regoff; \
int offset_p; \
int guest_reg = c->host_reg_to_guest_reg[dst_addr_reg]; \
\
CHECK_ADDR_REG (dst_addr_reg); \
\
/* Compensate for a7 predec/postinc byte size means +-2 nonsense. */ \
if (adjust_p && ((preoff) & 1) && guest_reg == 15) /* a7? */ \
regoff = (preoff) * 2; \
else \
regoff = preoff; \
\
offset_p = (c->guest_reg_status[guest_reg].mapping == MAP_OFFSET); \
if (offset_p) \
regoff += c->guest_reg_status[guest_reg].offset; \
\
/* Compensate for offset memory. */ \
regoff = (int32) SYN68K_TO_US (regoff); \
\
/* Actually write the value out to memory. */ \
if (regoff == 0) \
i386_mov ## size ## _reg_ind (COMMON_ARG_NAMES, \
src_reg, dst_addr_reg); \
else \
i386_mov ## size ## _reg_indoff (COMMON_ARG_NAMES, src_reg, \
regoff, dst_addr_reg); \
/* Adjust the address register. */ \
if (postoff && adjust_p) \
{ \
int32 newoff; \
\
if (((postoff) & 1) && guest_reg == 15) /* a7? Compensate... */ \
newoff = (postoff) * 2; \
else \
newoff = postoff; \
\
if (offset_p) \
{ \
/* If we're already offset, adjust our offset some more. */ \
if ((c->guest_reg_status[guest_reg].offset += newoff) == 0) \
c->guest_reg_status[guest_reg].mapping = MAP_NATIVE; \
} \
else \
{ \
/* We now become offset from our original value. */ \
c->guest_reg_status[guest_reg].offset = newoff; \
c->guest_reg_status[guest_reg].mapping = MAP_OFFSET; \
} \
} \
\
return 0; \
}
#undef OFF
#define OFF
HOST_MOV_REG_MEM(b, ind, 0, 0, FALSE)
HOST_MOV_REG_MEM(w, ind, 0, 0, FALSE)
HOST_MOV_REG_MEM(l, ind, 0, 0, FALSE)
HOST_MOV_REG_MEM(b, predec, -1, -1, TRUE)
HOST_MOV_REG_MEM(w, predec, -2, -2, TRUE)
HOST_MOV_REG_MEM(l, predec, -4, -4, TRUE)
HOST_MOV_REG_MEM(b, postinc, 0, 1, TRUE)
HOST_MOV_REG_MEM(w, postinc, 0, 2, TRUE)
HOST_MOV_REG_MEM(l, postinc, 0, 4, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_MOV_REG_MEM(b, indoff, offset, 0, FALSE)
HOST_MOV_REG_MEM(w, indoff, offset, 0, FALSE)
HOST_MOV_REG_MEM(l, indoff, offset, 0, FALSE)
#define HOST_MOV_REG_MEM_SWAP(size, amode, swap) \
int \
host_move ## size ## _reg_ ## amode ## _swap (COMMON_ARGS, int32 src_reg,\
OFF int32 addr_reg) \
{ \
/* Bail out if the two registers are the same! */ \
if (src_reg == addr_reg) \
return 1; \
\
CHECK_ADDR_REG (addr_reg); \
\
cc_spill_if_changed |= cc_to_compute; \
swap (src_reg); \
return host_move ## size ## _reg_ ## amode (COMMON_ARG_NAMES, src_reg, \
OFFNAME addr_reg); \
}
#undef OFF
#define OFF
#undef OFFNAME
#define OFFNAME
HOST_MOV_REG_MEM_SWAP(w, ind, HOST_SWAP16)
HOST_MOV_REG_MEM_SWAP(l, ind, HOST_SWAP32)
HOST_MOV_REG_MEM_SWAP(w, predec, HOST_SWAP16)
HOST_MOV_REG_MEM_SWAP(l, predec, HOST_SWAP32)
HOST_MOV_REG_MEM_SWAP(w, postinc, HOST_SWAP16)
HOST_MOV_REG_MEM_SWAP(l, postinc, HOST_SWAP32)
#undef OFF
#define OFF int32 offset,
#undef OFFNAME
#define OFFNAME offset,
HOST_MOV_REG_MEM_SWAP(w, indoff, HOST_SWAP16)
HOST_MOV_REG_MEM_SWAP(l, indoff, HOST_SWAP32)
#define HOST_MOV_MEM_REG(size, amode, preoff, postoff, adjust_p, byte_p) \
int \
host_move ## size ## _ ## amode ## _reg (COMMON_ARGS, OFF int32 src_addr_reg,\
int32 dst_reg) \
{ \
int32 regoff; \
int offset_p; \
int guest_reg = c->host_reg_to_guest_reg[src_addr_reg]; \
\
CHECK_ADDR_REG (src_addr_reg); \
\
/* Compensate for a7 predec/postinc byte size means +-2 nonsense. */ \
if (adjust_p && ((preoff) & 1) && guest_reg == 15) /* a7? */ \
regoff = (preoff) * 2; \
else \
regoff = preoff; \
\
offset_p = (c->guest_reg_status[guest_reg].mapping == MAP_OFFSET); \
if (offset_p) \
regoff += c->guest_reg_status[guest_reg].offset; \
\
/* Compensate for offset memory. */ \
regoff = (int32) SYN68K_TO_US (regoff); \
\
/* Read the value in from memory. */ \
if (regoff == 0) \
i386_mov ## size ## _ind_reg (COMMON_ARG_NAMES, src_addr_reg, dst_reg); \
else \
i386_mov ## size ## _indoff_reg (COMMON_ARG_NAMES, regoff, src_addr_reg, \
dst_reg); \
\
/* Adjust the address register. */ \
if (postoff && adjust_p && (byte_p || src_addr_reg != dst_reg)) \
{ \
int32 newoff; \
\
if (((postoff) & 1) && guest_reg == 15) /* a7? Compensate... */ \
newoff = (postoff) * 2; \
else \
newoff = postoff; \
\
if (offset_p) \
{ \
/* If we're already offset, adjust our offset some more. */ \
if ((c->guest_reg_status[guest_reg].offset += newoff) == 0) \
c->guest_reg_status[guest_reg].mapping = MAP_NATIVE; \
} \
else \
{ \
/* We now become offset from our original value. */ \
c->guest_reg_status[guest_reg].offset = newoff; \
c->guest_reg_status[guest_reg].mapping = MAP_OFFSET; \
} \
} \
\
return 0; \
}
#undef OFF
#define OFF
HOST_MOV_MEM_REG(b, ind, 0, 0, FALSE, TRUE)
HOST_MOV_MEM_REG(w, ind, 0, 0, FALSE, FALSE)
HOST_MOV_MEM_REG(l, ind, 0, 0, FALSE, FALSE)
HOST_MOV_MEM_REG(b, predec, -1, -1, TRUE, TRUE)
HOST_MOV_MEM_REG(w, predec, -2, -2, TRUE, FALSE)
HOST_MOV_MEM_REG(l, predec, -4, -4, TRUE, FALSE)
HOST_MOV_MEM_REG(b, postinc, 0, 1, TRUE, TRUE)
HOST_MOV_MEM_REG(w, postinc, 0, 2, TRUE, FALSE)
HOST_MOV_MEM_REG(l, postinc, 0, 4, TRUE, FALSE)
#undef OFF
#define OFF int32 offset,
HOST_MOV_MEM_REG(b, indoff, offset, 0, FALSE, TRUE)
HOST_MOV_MEM_REG(w, indoff, offset, 0, FALSE, FALSE)
HOST_MOV_MEM_REG(l, indoff, offset, 0, FALSE, FALSE)
#define HOST_MOV_MEM_REG_SWAP(size, amode, swap) \
int \
host_move ## size ## _ ## amode ## _reg_swap (COMMON_ARGS, \
OFF int32 addr_reg, \
int32 dst_reg) \
{ \
CHECK_ADDR_REG (addr_reg); \
\
host_move ## size ## _ ## amode ## _reg (COMMON_ARG_NAMES, \
OFFNAME addr_reg, dst_reg); \
swap (dst_reg); \
return 0; \
}
#undef OFF
#define OFF
#undef OFFNAME
#define OFFNAME
HOST_MOV_MEM_REG_SWAP(w, ind, HOST_SWAP16)
HOST_MOV_MEM_REG_SWAP(l, ind, HOST_SWAP32)
HOST_MOV_MEM_REG_SWAP(w, predec, HOST_SWAP16)
HOST_MOV_MEM_REG_SWAP(l, predec, HOST_SWAP32)
HOST_MOV_MEM_REG_SWAP(w, postinc, HOST_SWAP16)
HOST_MOV_MEM_REG_SWAP(l, postinc, HOST_SWAP32)
#undef OFF
#define OFF int32 offset,
#undef OFFNAME
#define OFFNAME offset,
HOST_MOV_MEM_REG_SWAP(w, indoff, HOST_SWAP16)
HOST_MOV_MEM_REG_SWAP(l, indoff, HOST_SWAP32)
#define HOST_OP_MEM_REG(size, op, amode, preoff, postoff, adjust_p, byte_p) \
int \
host_ ## op ## size ## _ ## amode ## _reg (COMMON_ARGS, \
OFF int32 src_addr_reg, \
int32 dst_reg) \
{ \
int32 regoff; \
int offset_p; \
int guest_reg = c->host_reg_to_guest_reg[src_addr_reg]; \
\
CHECK_ADDR_REG (src_addr_reg); \
\
/* Compensate for a7 predec/postinc byte size means +-2 nonsense. */ \
if (adjust_p && ((preoff) & 1) && guest_reg == 15) /* a7? */ \
regoff = (preoff) * 2; \
else \
regoff = preoff; \
\
offset_p = (c->guest_reg_status[guest_reg].mapping == MAP_OFFSET); \
if (offset_p) \
regoff += c->guest_reg_status[guest_reg].offset; \
\
/* Compensate for offset memory. */ \
regoff = (int32) SYN68K_TO_US (regoff); \
\
/* Read the value in from memory. */ \
if (regoff == 0) \
i386_ ## op ## size ## _ind_reg (COMMON_ARG_NAMES, src_addr_reg, \
dst_reg); \
else \
i386_ ## op ## size ## _indoff_reg (COMMON_ARG_NAMES, regoff, \
src_addr_reg, dst_reg); \
\
/* Adjust the address register. */ \
if (postoff && adjust_p && (byte_p || src_addr_reg != dst_reg)) \
{ \
int32 newoff; \
\
if (((postoff) & 1) && guest_reg == 15) /* a7? Compensate... */ \
newoff = (postoff) * 2; \
else \
newoff = postoff; \
\
if (offset_p) \
{ \
/* If we're already offset, adjust our offset some more. */ \
if ((c->guest_reg_status[guest_reg].offset += newoff) == 0) \
c->guest_reg_status[guest_reg].mapping = MAP_NATIVE; \
} \
else \
{ \
/* We now become offset from our original value. */ \
c->guest_reg_status[guest_reg].offset = newoff; \
c->guest_reg_status[guest_reg].mapping = MAP_OFFSET; \
} \
} \
\
return 0; \
}
#undef OFF
#define OFF
HOST_OP_MEM_REG(b, and, ind, 0, 0, FALSE, TRUE)
HOST_OP_MEM_REG(w, and, ind, 0, 0, FALSE, FALSE)
HOST_OP_MEM_REG(l, and, ind, 0, 0, FALSE, FALSE)
HOST_OP_MEM_REG(b, and, predec, -1, -1, TRUE, TRUE)
HOST_OP_MEM_REG(w, and, predec, -2, -2, TRUE, FALSE)
HOST_OP_MEM_REG(l, and, predec, -4, -4, TRUE, FALSE)
HOST_OP_MEM_REG(b, and, postinc, 0, 1, TRUE, TRUE)
HOST_OP_MEM_REG(w, and, postinc, 0, 2, TRUE, FALSE)
HOST_OP_MEM_REG(l, and, postinc, 0, 4, TRUE, FALSE)
#undef OFF
#define OFF int32 offset,
HOST_OP_MEM_REG(b, and, indoff, offset, 0, FALSE, TRUE)
HOST_OP_MEM_REG(w, and, indoff, offset, 0, FALSE, FALSE)
HOST_OP_MEM_REG(l, and, indoff, offset, 0, FALSE, FALSE)
#undef OFF
#define OFF
HOST_OP_MEM_REG(b, or, ind, 0, 0, FALSE, TRUE)
HOST_OP_MEM_REG(w, or, ind, 0, 0, FALSE, FALSE)
HOST_OP_MEM_REG(l, or, ind, 0, 0, FALSE, FALSE)
HOST_OP_MEM_REG(b, or, predec, -1, -1, TRUE, TRUE)
HOST_OP_MEM_REG(w, or, predec, -2, -2, TRUE, FALSE)
HOST_OP_MEM_REG(l, or, predec, -4, -4, TRUE, FALSE)
HOST_OP_MEM_REG(b, or, postinc, 0, 1, TRUE, TRUE)
HOST_OP_MEM_REG(w, or, postinc, 0, 2, TRUE, FALSE)
HOST_OP_MEM_REG(l, or, postinc, 0, 4, TRUE, FALSE)
#undef OFF
#define OFF int32 offset,
HOST_OP_MEM_REG(b, or, indoff, offset, 0, FALSE, TRUE)
HOST_OP_MEM_REG(w, or, indoff, offset, 0, FALSE, FALSE)
HOST_OP_MEM_REG(l, or, indoff, offset, 0, FALSE, FALSE)
#undef OFF
#define OFF
HOST_OP_MEM_REG(b, add, ind, 0, 0, FALSE, TRUE)
HOST_OP_MEM_REG(b, add, predec, -1, -1, TRUE, TRUE)
HOST_OP_MEM_REG(b, add, postinc, 0, 1, TRUE, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_MEM_REG(b, add, indoff, offset, 0, FALSE, TRUE)
#undef OFF
#define OFF
HOST_OP_MEM_REG(b, sub, ind, 0, 0, FALSE, TRUE)
HOST_OP_MEM_REG(b, sub, predec, -1, -1, TRUE, TRUE)
HOST_OP_MEM_REG(b, sub, postinc, 0, 1, TRUE, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_MEM_REG(b, sub, indoff, offset, 0, FALSE, TRUE)
#undef OFF
#define OFF
HOST_OP_MEM_REG(b, cmp, ind, 0, 0, FALSE, TRUE)
HOST_OP_MEM_REG(w, cmp, ind, 0, 0, FALSE, FALSE)
HOST_OP_MEM_REG(l, cmp, ind, 0, 0, FALSE, FALSE)
HOST_OP_MEM_REG(b, cmp, predec, -1, -1, TRUE, TRUE)
HOST_OP_MEM_REG(w, cmp, predec, -2, -2, TRUE, FALSE)
HOST_OP_MEM_REG(l, cmp, predec, -4, -4, TRUE, FALSE)
HOST_OP_MEM_REG(b, cmp, postinc, 0, 1, TRUE, TRUE)
HOST_OP_MEM_REG(w, cmp, postinc, 0, 2, TRUE, FALSE)
HOST_OP_MEM_REG(l, cmp, postinc, 0, 4, TRUE, FALSE)
#undef OFF
#define OFF int32 offset,
HOST_OP_MEM_REG(b, cmp, indoff, offset, 0, FALSE, TRUE)
HOST_OP_MEM_REG(w, cmp, indoff, offset, 0, FALSE, FALSE)
HOST_OP_MEM_REG(l, cmp, indoff, offset, 0, FALSE, FALSE)
#define HOST_OP_REG_MEM(size, op, amode, preoff, postoff, adjust_p) \
int \
host_ ## op ## size ## _reg_ ## amode (COMMON_ARGS, int32 src_reg, \
OFF int32 dst_addr_reg) \
{ \
int32 regoff; \
int offset_p; \
int guest_reg = c->host_reg_to_guest_reg[dst_addr_reg]; \
\
CHECK_ADDR_REG (dst_addr_reg); \
\
/* Compensate for a7 predec/postinc byte size means +-2 nonsense. */ \
if (adjust_p && ((preoff) & 1) && guest_reg == 15) /* a7? */ \
regoff = (preoff) * 2; \
else \
regoff = preoff; \
\
offset_p = (c->guest_reg_status[guest_reg].mapping == MAP_OFFSET); \
if (offset_p) \
regoff += c->guest_reg_status[guest_reg].offset; \
\
/* Compensate for offset memory. */ \
regoff = (int32) SYN68K_TO_US (regoff); \
\
/* Read the value in from memory. */ \
if (regoff == 0) \
i386_ ## op ## size ## _reg_ind (COMMON_ARG_NAMES, src_reg, \
dst_addr_reg); \
else \
i386_ ## op ## size ## _reg_indoff (COMMON_ARG_NAMES, src_reg, regoff, \
dst_addr_reg); \
\
/* Adjust the address register. */ \
if (postoff && adjust_p) \
{ \
int32 newoff; \
\
if (((postoff) & 1) && guest_reg == 15) /* a7? Compensate... */ \
newoff = (postoff) * 2; \
else \
newoff = postoff; \
\
if (offset_p) \
{ \
/* If we're already offset, adjust our offset some more. */ \
if ((c->guest_reg_status[guest_reg].offset += newoff) == 0) \
c->guest_reg_status[guest_reg].mapping = MAP_NATIVE; \
} \
else \
{ \
/* We now become offset from our original value. */ \
c->guest_reg_status[guest_reg].offset = newoff; \
c->guest_reg_status[guest_reg].mapping = MAP_OFFSET; \
} \
} \
\
return 0; \
}
#undef OFF
#define OFF
HOST_OP_REG_MEM(b, and, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(w, and, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(l, and, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(b, and, predec, -1, -1, TRUE)
HOST_OP_REG_MEM(w, and, predec, -2, -2, TRUE)
HOST_OP_REG_MEM(l, and, predec, -4, -4, TRUE)
HOST_OP_REG_MEM(b, and, postinc, 0, 1, TRUE)
HOST_OP_REG_MEM(w, and, postinc, 0, 2, TRUE)
HOST_OP_REG_MEM(l, and, postinc, 0, 4, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_REG_MEM(b, and, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(w, and, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(l, and, indoff, offset, 0, FALSE)
#undef OFF
#define OFF
HOST_OP_REG_MEM(b, or, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(w, or, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(l, or, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(b, or, predec, -1, -1, TRUE)
HOST_OP_REG_MEM(w, or, predec, -2, -2, TRUE)
HOST_OP_REG_MEM(l, or, predec, -4, -4, TRUE)
HOST_OP_REG_MEM(b, or, postinc, 0, 1, TRUE)
HOST_OP_REG_MEM(w, or, postinc, 0, 2, TRUE)
HOST_OP_REG_MEM(l, or, postinc, 0, 4, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_REG_MEM(b, or, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(w, or, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(l, or, indoff, offset, 0, FALSE)
#undef OFF
#define OFF
HOST_OP_REG_MEM(b, xor, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(w, xor, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(l, xor, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(b, xor, predec, -1, -1, TRUE)
HOST_OP_REG_MEM(w, xor, predec, -2, -2, TRUE)
HOST_OP_REG_MEM(l, xor, predec, -4, -4, TRUE)
HOST_OP_REG_MEM(b, xor, postinc, 0, 1, TRUE)
HOST_OP_REG_MEM(w, xor, postinc, 0, 2, TRUE)
HOST_OP_REG_MEM(l, xor, postinc, 0, 4, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_REG_MEM(b, xor, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(w, xor, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(l, xor, indoff, offset, 0, FALSE)
#undef OFF
#define OFF
HOST_OP_REG_MEM(b, add, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(b, add, predec, -1, -1, TRUE)
HOST_OP_REG_MEM(b, add, postinc, 0, 1, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_REG_MEM(b, add, indoff, offset, 0, FALSE)
#undef OFF
#define OFF
HOST_OP_REG_MEM(b, sub, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(b, sub, predec, -1, -1, TRUE)
HOST_OP_REG_MEM(b, sub, postinc, 0, 1, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_REG_MEM(b, sub, indoff, offset, 0, FALSE)
#undef OFF
#define OFF
HOST_OP_REG_MEM(b, cmp, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(w, cmp, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(l, cmp, ind, 0, 0, FALSE)
HOST_OP_REG_MEM(b, cmp, predec, -1, -1, TRUE)
HOST_OP_REG_MEM(w, cmp, predec, -2, -2, TRUE)
HOST_OP_REG_MEM(l, cmp, predec, -4, -4, TRUE)
HOST_OP_REG_MEM(b, cmp, postinc, 0, 1, TRUE)
HOST_OP_REG_MEM(w, cmp, postinc, 0, 2, TRUE)
HOST_OP_REG_MEM(l, cmp, postinc, 0, 4, TRUE)
#undef OFF
#define OFF int32 offset,
HOST_OP_REG_MEM(b, cmp, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(w, cmp, indoff, offset, 0, FALSE)
HOST_OP_REG_MEM(l, cmp, indoff, offset, 0, FALSE)
int
host_cmpmb_postinc_postinc (COMMON_ARGS, int32 reg1, int32 reg2)
{
host_moveb_postinc_reg (COMMON_ARG_NAMES, reg1, scratch_reg);
host_moveb_postinc_reg (COMMON_ARG_NAMES, reg2, scratch_reg + 4);
host_unoffset_reg (c, codep, cc_spill_if_changed,
c->host_reg_to_guest_reg[reg1]);
host_unoffset_reg (c, codep, cc_spill_if_changed,
c->host_reg_to_guest_reg[reg2]);
i386_cmpb_reg_reg (COMMON_ARG_NAMES, scratch_reg, scratch_reg + 4);
return 0;
}
int
host_cmpmw_postinc_postinc (COMMON_ARGS, int32 reg1, int32 reg2)
{
int32 scratch_reg_2;
scratch_reg_2 = host_alloc_reg (c, codep, cc_spill_if_changed,
REGSET_ALL & ~((1L << reg1)
| (1L << reg2)
| (1L << scratch_reg)));
if (scratch_reg_2 == NO_REG)
return 1;
host_movew_postinc_reg (COMMON_ARG_NAMES, reg1, scratch_reg);
host_movew_postinc_reg (COMMON_ARG_NAMES, reg2, scratch_reg_2);
/* We choose to unoffset the registers _now_, because we'll almost
* certainly need the cc bits after the compare and the adds to unoffset
* will clobber the i386 cc's.
*/
/* Add and swap back to back, for Pentium pairability. */
host_unoffset_reg (c, codep, cc_spill_if_changed,
c->host_reg_to_guest_reg[reg1]);
if (cc_to_compute & (M68K_CCN | M68K_CCC | M68K_CCV))
HOST_SWAP16 (scratch_reg);
/* Add and swap back to back, for Pentium pairability. */
host_unoffset_reg (c, codep, cc_spill_if_changed,
c->host_reg_to_guest_reg[reg2]);
if (cc_to_compute & (M68K_CCN | M68K_CCC | M68K_CCV))
HOST_SWAP16 (scratch_reg_2);
/* Finally do the compare. */
i386_cmpw_reg_reg (COMMON_ARG_NAMES, scratch_reg, scratch_reg_2);
return 0;
}
int
host_cmpml_postinc_postinc (COMMON_ARGS, int32 reg1, int32 reg2)
{
int32 scratch_reg_2;
scratch_reg_2 = host_alloc_reg (c, codep, cc_spill_if_changed,
REGSET_ALL & ~((1L << reg1)
| (1L << reg2)
| (1L << scratch_reg)));
if (scratch_reg_2 == NO_REG)
return 1;
host_movel_postinc_reg (COMMON_ARG_NAMES, reg1, scratch_reg);
host_movel_postinc_reg (COMMON_ARG_NAMES, reg2, scratch_reg_2);
/* We choose to unoffset the registers _now_, because we'll almost
* certainly need the cc bits after the compare and the adds to unoffset
* will clobber the i386 cc's.
*/
/* Adds back to back for Pentium pairability since bswap isn't pairable. */
host_unoffset_reg (c, codep, cc_spill_if_changed,
c->host_reg_to_guest_reg[reg1]);
host_unoffset_reg (c, codep, cc_spill_if_changed,
c->host_reg_to_guest_reg[reg2]);
/* Swap the two temp guys around to native endian byte order. */
if (cc_to_compute & (M68K_CCN | M68K_CCC | M68K_CCV))
{
host_swap32 (COMMON_ARG_NAMES, scratch_reg);
host_swap32 (COMMON_ARG_NAMES, scratch_reg_2);
}
/* Finally do the compare. */
i386_cmpl_reg_reg (COMMON_ARG_NAMES, scratch_reg, scratch_reg_2);
return 0;
}
/* We special case this so we can deal with offset registers efficiently. */
#define ADD_SUB_CMPL_IMM_REG(op, v, adj, compare_p) \
int \
host_ ## op ## l_imm_reg (COMMON_ARGS, int32 val, int32 host_reg) \
{ \
int guest_reg; \
guest_reg_status_t *r; \
\
guest_reg = c->host_reg_to_guest_reg[host_reg]; \
r = &c->guest_reg_status[guest_reg]; \
\
if (!(cc_to_compute & ~(M68K_CCZ | M68K_CCN))) \
{ \
if (r->mapping == MAP_OFFSET) \
{ \
val adj r->offset; \
r->mapping = MAP_NATIVE; \
if (val == 0 && !cc_to_compute) \
/*-->*/ return 0; \
} \
\
if (compare_p \
|| !(cc_spill_if_changed & ~M68K_CCX) \
|| cc_to_compute) \
{ \
if (!compare_p && (v) == 1) \
i386_incl_reg (COMMON_ARG_NAMES, host_reg); \
else if (!compare_p && (v) == -1) \
i386_decl_reg (COMMON_ARG_NAMES, host_reg); \
else \
i386_ ## op ## l_imm_reg (COMMON_ARG_NAMES, val, host_reg); \
} \
else \
{ \
/* We can add without touching any cc's with leal. */ \
i386_leal_indoff (c, codep, M68K_CC_NONE, M68K_CC_NONE, \
NO_REG, (v), host_reg, host_reg); \
} \
} \
else /* We need the tricky cc bits. */ \
{ \
if (r->mapping == MAP_OFFSET) \
{ \
int32 offset = r->offset; \
if (offset != 0) \
{ \
if (offset == 1) \
i386_incl_reg (COMMON_ARG_NAMES, host_reg); \
else if (offset == -1) \
i386_decl_reg (COMMON_ARG_NAMES, host_reg); \
else \
i386_addl_imm_reg (COMMON_ARG_NAMES, offset, host_reg); \
} \
\
r->mapping = MAP_NATIVE; \
} \
\
i386_ ## op ## l_imm_reg (COMMON_ARG_NAMES, val, host_reg); \
} \
\
return 0; \
}
ADD_SUB_CMPL_IMM_REG (add, val, +=, FALSE)
ADD_SUB_CMPL_IMM_REG (sub, -val, -=, FALSE)
ADD_SUB_CMPL_IMM_REG (cmp, -val, -=, TRUE)
int
host_bclr_imm_reg (COMMON_ARGS, int32 bitnum, int32 reg)
{
return host_andl_imm_reg (c, codep, cc_spill_if_changed, M68K_CC_NONE,
scratch_reg, ~(1L << (bitnum & 31)), reg);
}
int
host_bset_imm_reg (COMMON_ARGS, int32 bitnum, int32 reg)
{
return host_orl_imm_reg (c, codep, cc_spill_if_changed, M68K_CC_NONE,
scratch_reg, 1L << (bitnum & 31), reg);
}
int
host_bchg_imm_reg (COMMON_ARGS, int32 bitnum, int32 reg)
{
return host_xorl_imm_reg (c, codep, cc_spill_if_changed, M68K_CC_NONE,
scratch_reg, 1L << (bitnum & 31), reg);
}
int
host_btst_imm_reg (COMMON_ARGS, int32 bitnum, int32 reg)
{
uint32 mask;
mask = 1L << (bitnum & 31);
switch (c->guest_reg_status[c->host_reg_to_guest_reg[reg]].mapping)
{
case MAP_NATIVE:
break;
case MAP_SWAP16:
mask = (mask & 0xFFFF0000) | SWAPUW_IFLE (mask);
break;
case MAP_SWAP32:
mask = SWAPUL_IFLE (mask);
break;
default:
abort ();
}
if (reg < 4 && (mask & 0xFFFF))
{
/* Do either "testb $0x4,%al" or "testb $0x8,%ah" (for example). */
if (mask & 0xFF)
i386_testb_imm_reg (COMMON_ARG_NAMES, mask, reg);
else
i386_testb_imm_reg (COMMON_ARG_NAMES, mask >> 8, reg + 4);
}
else
i386_testl_imm_reg (COMMON_ARG_NAMES, mask, reg);
return 0;
}
#define CONDL_BRANCH(name, cc_in, i386_insn, i386_reverse_insn, \
noncached_variant_p, \
two_noncached_cc_p, cc1, njmp1, cc2, njmp2, \
first_test_child) \
int \
host_ ## name (COMMON_ARGS, Block *b) \
{ \
unsigned cc_to_spill, cc[2]; \
host_code_t *start_code; \
int reverse_branch_p, cc_diff; \
static const int8 bits_set[32] = \
{ \
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, \
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5 \
}; \
\
/* Record the start so we can provide accurate backpatch information. */ \
start_code = *codep; \
\
/* First spill any dirty or offset registers. */ \
host_spill_regs (c, codep, cc_spill_if_changed | (cc_in)); \
\
cc[0] = b->child[0]->cc_needed & c->cached_cc & c->dirty_cc; \
cc[1] = b->child[1]->cc_needed & c->cached_cc & c->dirty_cc; \
\
/* We'll prefer branching when we don't need to spill ccs, and we'll \
* prefer branching to a block with children (e.g. avoid rts since \
* it's not likely to be in a loop.) \
*/ \
cc_diff = bits_set[cc[0]] - bits_set[cc[1]]; \
reverse_branch_p = (cc_diff < 0 \
|| (cc_diff == 0 && b->child[1]->num_parents == 0)); \
\
/* Make sure that the cc bits we need are still alive. */ \
if ((c->cached_cc & (cc_in)) == (cc_in)) \
{ \
/* Spill any cc bits that are live and cached, but only those needed \
* if we take the TRUE arm of the branch. We assume here that our \
* SPILL_CC_BITS() routine leaves the cc bits cached in reality, even \
* though it marks them uncached. \
*/ \
cc_to_spill = cc[!reverse_branch_p]; \
SPILL_CC_BITS (c, codep, cc_to_spill); \
\
/* Emit a conditional branch. */ \
if (reverse_branch_p) \
i386_reverse_insn (COMMON_ARG_NAMES, 0x12345678); \
else \
i386_insn (COMMON_ARG_NAMES, 0x12345678); \
} \
else if (noncached_variant_p) \
{ \
cc_to_spill = ((b->child[0]->cc_needed | b->child[1]->cc_needed \
| (cc_in)) \
& c->cached_cc & c->dirty_cc); \
SPILL_CC_BITS (c, codep, cc_to_spill); \
\
cc_to_compute = M68K_CCZ; \
cc_spill_if_changed = M68K_CC_NONE; \
\
/* We can test up to two cc bits for known values. */ \
if (two_noncached_cc_p) \
{ \
Block *child; \
\
i386_cmpb_imm_indoff (COMMON_ARG_NAMES, 0, \
offsetof (CPUState, cc1), REG_EBP); \
njmp1 (COMMON_ARG_NAMES, 0x12345678); \
\
/* Create a backpatch for this conditional branch. */ \
child = b->child[first_test_child]; \
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE, \
-4 /* Branch is relative to end of jmp. */ \
+ NATIVE_START_BYTE_OFFSET /* skip synth opcode */ \
+ (child->m68k_start_address > b->m68k_start_address \
? CHECK_INTERRUPT_STUB_BYTES : 0), \
child); \
} \
\
/* Check the secondary success condition. */ \
i386_cmpb_imm_indoff (COMMON_ARG_NAMES, 0, \
offsetof (CPUState, cc2), REG_EBP); \
njmp2 (COMMON_ARG_NAMES, 0x12345678); \
\
/* Note that we shouldn't try to save the cc bits output by the cmp \
* we just generated. \
*/ \
c->cached_cc = M68K_CC_NONE; \
c->dirty_cc = M68K_CC_NONE; \
\
reverse_branch_p = FALSE; \
} \
else \
return 1; \
\
/* Create a backpatch for this conditional branch. Note that this \
* backpatch is only relative to the start of this native code; \
* the main compile loop will adjust the backpatch to be relative \
* to the block start once our code has been placed. \
*/ \
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE, \
-4 /* Branch is relative to end of jxx. */ \
+ NATIVE_START_BYTE_OFFSET \
+ ((b->child[!reverse_branch_p]->m68k_start_address \
> b->m68k_start_address) \
? CHECK_INTERRUPT_STUB_BYTES : 0), \
b->child[!reverse_branch_p]); \
\
/* Spill any cc bits that are live and cached, but only those needed \
* if we take the FALSE arm of the branch. \
*/ \
cc_to_spill = (cc[reverse_branch_p]); \
SPILL_CC_BITS (c, codep, cc_to_spill); \
\
/* Emit a jmp to the failure block. */ \
i386_jmp (COMMON_ARG_NAMES, 0x12345678); \
\
/* Create a backpatch for this unconditional jmp. */ \
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE, \
-4 /* Branch is relative to end of jmp. */ \
+ NATIVE_START_BYTE_OFFSET /* Skip initial synth opcode.*/ \
+ ((b->child[reverse_branch_p]->m68k_start_address \
> b->m68k_start_address) \
? CHECK_INTERRUPT_STUB_BYTES : 0), \
b->child[reverse_branch_p]); \
return 0; \
}
CONDL_BRANCH (bcc, M68K_CCC, i386_jnc, i386_jc,
TRUE, FALSE, ccc, i386_jz, ccc, i386_jz, 0)
CONDL_BRANCH (bcs, M68K_CCC, i386_jc, i386_jnc,
TRUE, FALSE, ccc, i386_jz, ccc, i386_jnz, 0)
CONDL_BRANCH (beq, M68K_CCZ, i386_jz, i386_jnz,
TRUE, FALSE, ccc, i386_jz, ccnz, i386_jz, 0)
CONDL_BRANCH (bne, M68K_CCZ, i386_jnz, i386_jz,
TRUE, FALSE, ccc, i386_jz, ccnz, i386_jnz, 0)
CONDL_BRANCH (bge, M68K_CCN | M68K_CCV, i386_jge, i386_jl,
FALSE, FALSE, ccc, i386_jz, ccnz, i386_jz, 0)
CONDL_BRANCH (blt, M68K_CCN | M68K_CCV, i386_jl, i386_jge,
FALSE, FALSE, ccc, i386_jz, ccnz, i386_jz, 0)
CONDL_BRANCH (bgt, M68K_CCN | M68K_CCV | M68K_CCZ, i386_jnle, i386_jle,
FALSE, FALSE, ccc, i386_jz, ccnz, i386_jz, 0)
CONDL_BRANCH (ble, M68K_CCN | M68K_CCV | M68K_CCZ, i386_jle, i386_jnle,
FALSE, FALSE, ccc, i386_jz, ccnz, i386_jz, 0)
CONDL_BRANCH (bhi, M68K_CCC | M68K_CCZ, i386_jnbe, i386_jbe,
TRUE, TRUE, ccc, i386_jnz, ccnz, i386_jnz, 0)
CONDL_BRANCH (bls, M68K_CCC | M68K_CCZ, i386_jbe, i386_jnbe,
TRUE, TRUE, ccc, i386_jnz, ccnz, i386_jz, 1)
CONDL_BRANCH (bpl, M68K_CCN, i386_jns, i386_js,
TRUE, FALSE, ccc, i386_jz, ccn, i386_jz, 0)
CONDL_BRANCH (bmi, M68K_CCN, i386_js, i386_jns,
TRUE, FALSE, ccc, i386_jz, ccn, i386_jnz, 0)
CONDL_BRANCH (bvc, M68K_CCV, i386_jno, i386_jo,
TRUE, FALSE, ccc, i386_jz, ccv, i386_jz, 0)
CONDL_BRANCH (bvs, M68K_CCV, i386_jo, i386_jno,
TRUE, FALSE, ccc, i386_jz, ccv, i386_jnz, 0)
int
host_jmp (COMMON_ARGS, Block *b)
{
unsigned cc_to_spill;
host_code_t *start_code;
/* Record the start so we can provide accurate backpatch information. */
start_code = *codep;
/* Spill any needed cc bits. */
cc_to_spill = (b->child[0]->cc_needed & c->cached_cc & c->dirty_cc);
SPILL_CC_BITS (c, codep, cc_to_spill);
/* Spill any dirty or offset registers. */
host_spill_regs (c, codep, M68K_CC_NONE);
/* Emit a jmp to the target block. */
i386_jmp (COMMON_ARG_NAMES, 0x12345678);
/* Create a backpatch for this jmp. */
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE,
-4 /* Branch is relative to end of jmp. */
+ NATIVE_START_BYTE_OFFSET /* Skip initial synth opcode.*/
+ ((b->child[0]->m68k_start_address > b->m68k_start_address)
? CHECK_INTERRUPT_STUB_BYTES : 0),
b->child[0]);
return 0;
}
int
host_dbra (COMMON_ARGS, int32 guest_reg, Block *b)
{
unsigned cc_to_spill;
host_code_t *start_code;
int32 host_reg;
/* Record the start so we can provide accurate backpatch information. */
start_code = *codep;
/* Spill any cc bits that are live and cached. */
cc_to_spill = (c->cached_cc & c->dirty_cc);
SPILL_CC_BITS (c, codep, cc_to_spill);
/* Canonicalize all registers. If the loop register is cached,
* pretend like it's dirty so it gets canonicalized. It will be
* decremented below, so we won't be doing any extra work or
* anything.
*/
host_reg = c->guest_reg_status[guest_reg].host_reg;
if (host_reg != NO_REG)
c->guest_reg_status[guest_reg].dirty_without_offset_p = TRUE;
make_dirty_regs_native (c, codep, M68K_CC_NONE);
/* Decrement the loop register, whether it's cached or in memory. */
if (host_reg == NO_REG)
{
/* It's in memory. We've got to use subw since we need the carry. */
i386_subw_imm_indoff (c, codep, M68K_CC_NONE, M68K_CCC, NO_REG,
1, offsetof (CPUState, regs[guest_reg].uw.n),
REG_EBP);
}
else
{
/* It's in a reg. We've got to use subw since we need the carry.
* We already marked the reg dirty, above.
*/
i386_subw_imm_reg (c, codep, M68K_CC_NONE, M68K_CCC, NO_REG,
1, host_reg);
}
/* Spill all registers back to memory. */
host_spill_regs (c, codep, M68K_CCC);
/* Make sure that we've still got the carry from the decw. Of course,
* the real m68k doesn't have this carry value, so remember that.
*/
if (!(c->cached_cc & M68K_CCC))
return 1;
c->cached_cc = M68K_CC_NONE;
/* Emit a conditional branch. */
i386_jnc (COMMON_ARG_NAMES, 0x12345678);
/* Create a backpatch for this conditional branch. Note that this
* backpatch is only relative to the start of this native code;
* the main compile loop will adjust the backpatch to be relative
* to the block start once our code has been placed.
*/
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE,
-4 /* Branch is relative to end of jxx. */
+ NATIVE_START_BYTE_OFFSET, /* Skip initial synth opcode. */
b->child[1]);
/* Emit a jmp to the failure block. */
i386_jmp (COMMON_ARG_NAMES, 0x12345678);
/* Create a backpatch for this unconditional jmp. */
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE,
-4 /* Branch is relative to end of jmp. */
+ NATIVE_START_BYTE_OFFSET /* Skip initial synth opcode.*/
+ ((b->child[0]->m68k_start_address > b->m68k_start_address)
? CHECK_INTERRUPT_STUB_BYTES : 0),
b->child[0]);
return 0;
}
int
host_swap (COMMON_ARGS, int32 reg)
{
return i386_rorl_imm_reg (c, codep, cc_spill_if_changed, M68K_CC_NONE,
NO_REG, 16, reg);
}
int
host_extbw (COMMON_ARGS, int32 reg)
{
/* movb %al,%ah
* sarb $7,%ah
* testb %al,%al (optional)
*/
i386_movb_reg_reg (COMMON_ARG_NAMES, reg, reg + 4);
i386_sarb_imm_reg (COMMON_ARG_NAMES, 7, reg + 4);
if (cc_to_compute)
i386_testb_reg_reg (COMMON_ARG_NAMES, reg, reg);
return 0;
}
int
host_extwl (COMMON_ARGS, int32 reg)
{
i386_movswl_reg_reg (COMMON_ARG_NAMES, reg, reg);
if (cc_to_compute)
i386_testl_reg_reg (COMMON_ARG_NAMES, reg, reg);
return 0;
}
int
host_extbl (COMMON_ARGS, int32 reg)
{
if (cc_to_compute)
i386_testb_reg_reg (COMMON_ARG_NAMES, reg, reg);
return i386_movsbl_reg_reg (COMMON_ARG_NAMES, reg, reg);
}
int
host_unlk (COMMON_ARGS, int32 reg, int32 a7_reg)
{
if (reg == a7_reg) /* unlk a7 wedges the real 68040...heh */
return 1;
if (host_leal_indoff_areg (COMMON_ARG_NAMES, 4, reg, a7_reg))
return 1;
if (host_movel_ind_reg (COMMON_ARG_NAMES, reg, reg))
return 1;
return 0;
}
int
host_link (COMMON_ARGS, int32 offset, int32 reg, int32 a7_reg)
{
guest_reg_status_t *ga7;
ga7 = &c->guest_reg_status[15];
/* Push the old value on the stack, and move a7 into the frame pointer. */
host_subl_imm_reg (COMMON_ARG_NAMES, 4, a7_reg);
assert (ga7->mapping == MAP_NATIVE);
i386_movl_reg_indoff (COMMON_ARG_NAMES, reg, (int32) SYN68K_TO_US (0),
a7_reg);
i386_movl_reg_reg (COMMON_ARG_NAMES, a7_reg, reg);
/* Add the specified offset to a7. */
ga7->mapping = MAP_OFFSET;
ga7->offset = offset;
return 0;
}
int
host_moveml_reg_predec (COMMON_ARGS, int32 host_addr_reg, int32 reg_mask)
{
int i, guest_addr_reg;
guest_reg_status_t *g;
int32 off;
guest_addr_reg = c->host_reg_to_guest_reg[host_addr_reg];
g = &c->guest_reg_status[guest_addr_reg];
if (g->mapping == MAP_OFFSET)
off = g->offset;
else
off = 0;
/* Compensate for offset memory. */
off = (int32) SYN68K_TO_US (off);
for (i = 15; i >= 0; i--)
if (reg_mask & (0x8000 >> i))
{
int reg_to_move, host_reg;
g = &c->guest_reg_status[i];
host_reg = g->host_reg;
if (host_reg == host_addr_reg)
{
/* Here we move the real value of the register minus 4;
* this behavior is correct for the 68020 and up.
*/
i386_leal_indoff (COMMON_ARG_NAMES,
((g->mapping == MAP_OFFSET)
? g->offset : 0) - 4,
host_addr_reg, scratch_reg);
host_swap32 (COMMON_ARG_NAMES, scratch_reg);
reg_to_move = scratch_reg;
}
else if (host_reg == NO_REG)
{
i386_movl_indoff_reg (COMMON_ARG_NAMES,
offsetof (CPUState, regs[i].ul.n), REG_EBP,
scratch_reg);
host_swap32 (COMMON_ARG_NAMES, scratch_reg);
reg_to_move = scratch_reg;
}
else
{
switch (g->mapping)
{
case MAP_OFFSET:
host_unoffset_reg (c, codep, cc_spill_if_changed, i);
/* Fall through to MAP_NATIVE case... */
case MAP_NATIVE:
host_swap32 (COMMON_ARG_NAMES, host_reg);
g->mapping = MAP_SWAP32;
break;
case MAP_SWAP16:
host_swap16_to_32 (COMMON_ARG_NAMES, host_reg);
g->mapping = MAP_SWAP32;
break;
case MAP_SWAP32:
break;
default:
abort ();
}
reg_to_move = host_reg;
}
off -= 4;
if (off != 0)
i386_movl_reg_indoff (COMMON_ARG_NAMES, reg_to_move, off,
host_addr_reg);
else
i386_movl_reg_ind (COMMON_ARG_NAMES, reg_to_move, host_addr_reg);
}
g = &c->guest_reg_status[guest_addr_reg];
/* Undo fake memory offset. */
off = US_TO_SYN68K (off);
if (off == 0)
g->mapping = MAP_NATIVE;
else
{
g->mapping = MAP_OFFSET;
g->offset = off;
}
return 0;
}
int
host_moveml_postinc_reg (COMMON_ARGS, int32 host_addr_reg, int32 reg_mask)
{
int i, guest_addr_reg, off;
guest_reg_status_t *g;
host_reg_mask_t locked_host_regs;
guest_addr_reg = c->host_reg_to_guest_reg[host_addr_reg];
locked_host_regs = ((~ALLOCATABLE_REG_MASK) | (1L << host_addr_reg)
| (1L << scratch_reg));
g = &c->guest_reg_status[guest_addr_reg];
if (g->mapping == MAP_OFFSET)
off = g->offset;
else
off = 0;
/* Compensate for offset memory. */
off = (int32) SYN68K_TO_US (off);
for (i = 0; i < 16; i++)
if (reg_mask & (1L << i))
{
int host_reg;
if (i == guest_addr_reg)
{
/* Don't load up our address register. */
off += 4;
continue;
}
g = &c->guest_reg_status[i];
host_reg = g->host_reg;
if (host_reg == NO_REG)
{
host_reg = host_alloc_reg (c, codep, cc_spill_if_changed,
((i < 8)
? (REGSET_BYTE & ~locked_host_regs)
: ~locked_host_regs));
if (host_reg == NO_REG)
host_reg = scratch_reg;
else
{
locked_host_regs |= (1L << host_reg);
c->host_reg_to_guest_reg[host_reg] = i;
g->host_reg = host_reg;
}
}
if (off == 0)
i386_movl_ind_reg (COMMON_ARG_NAMES, host_addr_reg, host_reg);
else
i386_movl_indoff_reg (COMMON_ARG_NAMES, off, host_addr_reg,
host_reg);
if (host_reg == scratch_reg)
{
host_swap32 (COMMON_ARG_NAMES, scratch_reg);
i386_movl_reg_indoff (COMMON_ARG_NAMES, scratch_reg,
offsetof (CPUState, regs[i].ul.n), REG_EBP);
}
else
{
g->mapping = MAP_SWAP32;
g->dirty_without_offset_p = TRUE;
}
off += 4;
}
g = &c->guest_reg_status[guest_addr_reg];
/* Undo fake memory offset. */
off = US_TO_SYN68K (off);
if (off == 0)
g->mapping = MAP_NATIVE;
else
{
g->mapping = MAP_OFFSET;
g->offset = off;
}
return 0;
}
int
host_pea_indoff (COMMON_ARGS, int32 offset, int32 host_reg, int32 a7_reg)
{
int guest_reg;
guest_reg_status_t *g;
guest_reg = c->host_reg_to_guest_reg[host_reg];
g = &c->guest_reg_status[guest_reg];
if (g->mapping == MAP_OFFSET)
offset += g->offset;
if (offset == 0)
i386_movl_reg_reg (COMMON_ARG_NAMES, host_reg, scratch_reg);
else
i386_leal_indoff (COMMON_ARG_NAMES, offset, host_reg, scratch_reg);
host_swap32 (COMMON_ARG_NAMES, scratch_reg);
return host_movel_reg_predec (COMMON_ARG_NAMES, scratch_reg, a7_reg);
}
int
host_leal_indoff_areg (COMMON_ARGS, int32 offset, int32 base_reg,
int32 dst_reg)
{
guest_reg_status_t *g;
g = &c->guest_reg_status[c->host_reg_to_guest_reg[base_reg]];
if (g->mapping == MAP_OFFSET)
offset += g->offset;
if (offset == 0)
i386_movl_reg_reg (COMMON_ARG_NAMES, base_reg, dst_reg);
else
i386_leal_indoff (COMMON_ARG_NAMES, offset, base_reg, dst_reg);
return 0;
}
int
host_rts (COMMON_ARGS, Block *b, int32 a7_reg)
{
int jsr_sp_reg;
host_code_t *jnz_end_addr, *start_code;
/* Keep track of original codep so we can backpatch, below. */
start_code = *codep;
/* Spill all dirty cc bits. */
host_spill_cc_bits (c, codep, M68K_CC_ALL);
cc_spill_if_changed = M68K_CC_NONE;
/* Grab the return address. */
host_movel_postinc_reg (COMMON_ARG_NAMES, a7_reg, scratch_reg);
/* Spill all dirty regs. */
host_spill_regs (c, codep, M68K_CC_NONE);
/* Allocate a register to hold the jsr stack pointer. */
jsr_sp_reg = host_alloc_reg (c, codep, M68K_CC_NONE,
ALLOCATABLE_REG_MASK & ~(1L << scratch_reg));
if (jsr_sp_reg == NO_REG)
return 1;
/* Grab the jsr stack pointer. */
i386_movl_indoff_reg (COMMON_ARG_NAMES,
offsetof (CPUState, jsr_stack_byte_index), REG_EBP,
jsr_sp_reg);
/* Compare the return address to the tag at the top of the jsr
* stack cache. The tags are kept in big endian order, so we don't
* need to byte swap here.
*/
i386_cmpl_reg_indoff (COMMON_ARG_NAMES, scratch_reg,
(int32)&cpu_state.jsr_stack[0].tag, jsr_sp_reg);
/* If we don't get a hit, skip this code. */
i386_jnz (COMMON_ARG_NAMES, 5); /* One byte offset patched below. */
jnz_end_addr = *codep;
/* Fetch the code pointer. Clobber scratch_reg. */
i386_movl_indoff_reg (COMMON_ARG_NAMES,
(int32)&cpu_state.jsr_stack[0].code, jsr_sp_reg,
scratch_reg);
/* Pop the jsr stack and jump to the target address. */
i386_addl_imm_reg (COMMON_ARG_NAMES, sizeof (jsr_stack_elt_t), jsr_sp_reg);
i386_addl_imm_reg (COMMON_ARG_NAMES, NATIVE_START_BYTE_OFFSET, scratch_reg);
i386_andl_imm_reg (COMMON_ARG_NAMES, (sizeof cpu_state.jsr_stack) - 1,
jsr_sp_reg);
i386_movl_reg_indoff (COMMON_ARG_NAMES, jsr_sp_reg,
offsetof (CPUState, jsr_stack_byte_index), REG_EBP);
i386_jmp_reg (COMMON_ARG_NAMES, scratch_reg);
/* Patch up the jnz to jump to here. */
((int8 *)jnz_end_addr)[-1] = *codep - jnz_end_addr;
/* Call hash_lookup_code_and_create_if_needed(). */
host_swap32 (COMMON_ARG_NAMES, scratch_reg);
i386_pushl (COMMON_ARG_NAMES, scratch_reg);
i386_call_abs (COMMON_ARG_NAMES, 0x1234567A); /* hash_lookup_code_and... */
/* Note a backpatch for the call, since it's a relative displacement. */
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE,
-4 /* Branch is relative to end of call. */
+ (int32)hash_lookup_code_and_create_if_needed,
NULL);
/* Jump to the native code entry point for the code returned by
* hash_lookup_code_and_create_if_needed ().
*/
i386_addl_imm_reg (COMMON_ARG_NAMES, NATIVE_START_BYTE_OFFSET, REG_EAX);
i386_addl_imm_reg (COMMON_ARG_NAMES, 4, REG_ESP); /* Pop off call arg. */
i386_jmp_reg (COMMON_ARG_NAMES, REG_EAX);
return 0;
}
static void
host_recompile_jsr (Block *b, host_code_t *code_start,
int32 target_addr, int32 rts_addr,
int32 dynamic_address_reg)
{
int old_immortal, old_target_immortal, old_rts_immortal;
int jsr_sp_reg;
Block *target, *rts;
cache_info_t empty, *c;
host_code_t *code, **codep;
int cc_spill_if_changed, cc_to_compute, scratch_reg;
/* Set up some bogus COMMON_ARGS for the native code generation
* we're about to do.
*/
empty = empty_cache_info;
c = &empty;
code = code_start;
codep = &code;
cc_spill_if_changed = cc_to_compute = M68K_CC_NONE;
scratch_reg = NO_REG;
/* Make the jsr block temporarily immortal so it doesn't accidentally
* get trashed while compiling the target block.
*/
old_immortal = b->immortal;
b->immortal = TRUE;
/* Actually create the target code and then grab the block. */
hash_lookup_code_and_create_if_needed (target_addr);
target = hash_lookup (target_addr);
assert (target != NULL);
old_target_immortal = target->immortal;
target->immortal = TRUE;
/* Actually create the rts addr code and then grab the block. */
hash_lookup_code_and_create_if_needed (rts_addr);
rts = hash_lookup (rts_addr);
assert (rts != NULL);
old_rts_immortal = rts->immortal;
rts->immortal = TRUE;
/* Tie the blocks together. */
b->num_children = 2;
b->child[0] = target;
b->child[1] = rts;
block_add_parent (target, b);
block_add_parent (rts, b);
/* Replace all of the recompile gunk with some code that adjusts the
* jsr stack and then jumps to the target address. We can use any
* i386 registers we want here as long as we don't clobber
* dynamic_address_reg.
*/
jsr_sp_reg = (dynamic_address_reg == REG_EAX) ? REG_EBX : REG_EAX;
/* Grab the jsr stack pointer. */
i386_movl_indoff_reg (COMMON_ARG_NAMES,
offsetof (CPUState, jsr_stack_byte_index), REG_EBP,
jsr_sp_reg);
/* Push the return code onto the jsr stack. */
i386_subl_imm_reg (COMMON_ARG_NAMES, sizeof (jsr_stack_elt_t), jsr_sp_reg);
i386_andl_imm_reg (COMMON_ARG_NAMES, (sizeof cpu_state.jsr_stack) - 1,
jsr_sp_reg);
i386_movl_reg_indoff (COMMON_ARG_NAMES, jsr_sp_reg,
offsetof (CPUState, jsr_stack_byte_index), REG_EBP);
i386_movl_imm_indoff (COMMON_ARG_NAMES, SWAPUL (rts_addr),
(int32)&cpu_state.jsr_stack[0].tag, jsr_sp_reg);
i386_movl_imm_indoff (COMMON_ARG_NAMES, (int32)rts->compiled_code,
(int32)&cpu_state.jsr_stack[0].code, jsr_sp_reg);
if (dynamic_address_reg != NO_REG)
{
cc_to_compute = M68K_CCZ;
i386_cmpl_imm_reg (COMMON_ARG_NAMES, target_addr, dynamic_address_reg);
cc_to_compute = M68K_CC_NONE;
i386_jz (COMMON_ARG_NAMES, 0x1234567D);
*(int32 *)(code - 4) = (((char *)target->compiled_code
+ NATIVE_START_BYTE_OFFSET)
- (char *)code);
i386_pushl (COMMON_ARG_NAMES, dynamic_address_reg);
/* Call hash_lookup_code_and_create_if_needed(). */
i386_call_abs (COMMON_ARG_NAMES, 0x1234567A);
*(int32 *)(code - 4) = ((char *)hash_lookup_code_and_create_if_needed
- (char *)code);
/* Jump to the native code entry point for the code returned by
* hash_lookup_code_and_create_if_needed ().
*/
i386_addl_imm_reg (COMMON_ARG_NAMES, NATIVE_START_BYTE_OFFSET, REG_EAX);
i386_addl_imm_reg (COMMON_ARG_NAMES, 4, REG_ESP); /* Pop off call arg. */
i386_jmp_reg (COMMON_ARG_NAMES, REG_EAX);
}
else
{
/* jmp to the target address. */
i386_jmp (COMMON_ARG_NAMES, 0x1234567D);
*(int32 *)(code - 4) = (((char *)target->compiled_code
+ NATIVE_START_BYTE_OFFSET)
- (char *)code);
}
b->immortal = old_immortal;
rts->immortal = old_rts_immortal;
target->immortal = old_target_immortal;
}
static int
host_jsr_abs_common (COMMON_ARGS, int32 a7_reg, int32 target_addr,
Block *b, int32 return_addr, int jsr_d16_base_reg)
{
host_code_t *orig_code, *replaced_code, *end_call;
int temp_reg;
orig_code = *codep;
/* Spill all dirty cc bits. */
host_spill_cc_bits (c, codep, M68K_CC_ALL);
cc_spill_if_changed = M68K_CC_NONE;
/* Push the m68k return address on the stack. */
host_movel_imm_predec (COMMON_ARG_NAMES, return_addr, a7_reg);
if (jsr_d16_base_reg != NO_REG)
{
if (host_leal_indoff_areg (COMMON_ARG_NAMES, target_addr,
jsr_d16_base_reg, scratch_reg))
return 1;
}
/* Spill all registers back to their memory homes. */
host_spill_regs (c, codep, M68K_CC_NONE);
/* NOTE!!!! All code from this point on is about to smash itself
* with a faster jsr that knows where its target block is. We do it
* this way so we can lazily compile through jsrs.
*/
replaced_code = *codep;
/* Save the scratch register. */
if (scratch_reg != NO_REG)
i386_pushl (COMMON_ARG_NAMES, scratch_reg);
/* Push call args on the stack. If you add more args or delete any,
* be sure to adjust ESP differently, below, to pop off the args.
*/
i386_pushl_imm (COMMON_ARG_NAMES, scratch_reg);
i386_pushl_imm (COMMON_ARG_NAMES, return_addr);
if (jsr_d16_base_reg != NO_REG)
i386_pushl (COMMON_ARG_NAMES, scratch_reg);
else
i386_pushl_imm (COMMON_ARG_NAMES, target_addr);
i386_call_abs (COMMON_ARG_NAMES, 0); /* Push current PC on the stack. */
end_call = *codep;
temp_reg = (scratch_reg == REG_EAX) ? REG_EBX : REG_EAX;
i386_popl (COMMON_ARG_NAMES, temp_reg);
i386_subl_imm_reg (COMMON_ARG_NAMES, end_call - replaced_code, temp_reg);
i386_pushl (COMMON_ARG_NAMES, temp_reg);
i386_pushl_imm (COMMON_ARG_NAMES, (int32)b);
/* Add some more dead space so there will be room for this code
* to be overwritten.
*/
memset (*codep, 0x90 /* NOP */, 48);
*codep += 48;
/* Call a routine that will rewrite this jsr into a direct one. */
i386_call_abs (COMMON_ARG_NAMES, 0x1234567C);
/* Note a backpatch for the call, since it's a relative displacement. */
backpatch_add (b, (*codep - orig_code - 4) * 8, 32, TRUE,
-4 /* Branch is relative to end of call. */
+ (int32)host_recompile_jsr,
NULL);
/* Pop off all call args. */
i386_addl_imm_reg (COMMON_ARG_NAMES, 5 * 4, REG_ESP);
/* Restore the scratch reg. */
if (scratch_reg != NO_REG)
i386_popl (COMMON_ARG_NAMES, scratch_reg);
/* Jump back to the beginning and do the fast jsr this time
* (and every subsequent time).
*/
i386_jmp (COMMON_ARG_NAMES, 5);
((int8 *)*codep)[-1] = replaced_code - *codep;
return 0;
}
int
host_jsr_abs (COMMON_ARGS, int32 a7_reg, int32 target_addr,
Block *b, uint16 *m68k_code)
{
int32 return_addr;
/* Compute the real return address. */
switch (SWAPUW (*m68k_code) & 63)
{
case 0x38: /* absw */
return_addr = (syn68k_addr_t) (m68k_code + 2);
break;
case 0x39: /* absl */
return_addr = (syn68k_addr_t) (m68k_code + 3);
break;
default:
return_addr = 0; /* Avoid compiler warnings. */
abort ();
break;
}
return host_jsr_abs_common (COMMON_ARG_NAMES, a7_reg, target_addr, b,
US_TO_SYN68K (return_addr), NO_REG);
}
int
host_jsr_pcd16 (COMMON_ARGS, int32 a7_reg, Block *b, uint16 *m68k_code)
{
/* Map this to a jsr_abs. */
return host_jsr_abs_common (COMMON_ARG_NAMES, a7_reg,
(int32) (US_TO_SYN68K (m68k_code) + 2
+ SWAPSW (m68k_code[1])),
b, US_TO_SYN68K (m68k_code + 2), NO_REG);
}
int
host_jsr_d16 (COMMON_ARGS, int32 a7_reg, int32 base_addr_reg,
Block *b, uint16 *m68k_code)
{
return host_jsr_abs_common (COMMON_ARG_NAMES, a7_reg, SWAPSW (m68k_code[1]),
b, US_TO_SYN68K (m68k_code + 2), base_addr_reg);
}
int
host_bsr (COMMON_ARGS, int32 a7_reg, Block *b, uint16 *m68k_code)
{
int32 addr, return_addr;
/* Compute the bsr destination address. */
switch (((const uint8 *)m68k_code)[1])
{
case 0x00:
addr = (int32)(m68k_code + 1) + SWAPSW (m68k_code[1]);
return_addr = (int32) (m68k_code + 2);
break;
case 0xFF:
addr = (int32)(m68k_code + 1) + READSL (US_TO_SYN68K (m68k_code + 1));
return_addr = (int32) (m68k_code + 3);
break;
default:
addr = (int32)(m68k_code + 1) + ((const int8 *)m68k_code)[1];
return_addr = (int32) (m68k_code + 1);
break;
}
return host_jsr_abs_common (COMMON_ARG_NAMES, a7_reg,
US_TO_SYN68K (addr),
b, US_TO_SYN68K (return_addr), NO_REG);
}
/* Divides %eax by scratch_reg, and stores the quotient in
* %ax and the remainder in the high 16 bits of %eax, unless there
* is overflow in which case no action is taken. Division by zero
* causes a trap.
*/
int
host_divsw (COMMON_ARGS, uint16 *m68k_addr, uint16 *next_addr, Block *b,
int32 might_overflow_i386_p)
{
host_code_t *overflow_branch_end, *jmp_end, *br_end_1, *br_end_2;
int real_cc_to_compute;
host_code_t *start_code;
/* Record the start so we can provide accurate backpatch information. */
start_code = *codep;
real_cc_to_compute = cc_to_compute;
cc_to_compute = M68K_CC_NONE;
assert (scratch_reg != -1 && scratch_reg != REG_EDX);
/* Pick up %edx as another scratch register. */
if (host_alloc_reg (c, codep, cc_spill_if_changed, 1L << REG_EDX)
!= REG_EDX)
return 3;
/* Check for division by zero. */
if (m68k_addr != NULL)
{
host_code_t *divzero_branch_end;
cache_info_t save;
save = *c;
i386_testl_reg_reg (COMMON_ARG_NAMES, scratch_reg, scratch_reg);
i386_jnz (COMMON_ARG_NAMES, 5);
divzero_branch_end = *codep;
/* Ack! Division by zero! */
host_spill_cc_bits (c, codep,
M68K_CCN | M68K_CCV | M68K_CCX | M68K_CCZ);
i386_movb_imm_indoff (COMMON_ARG_NAMES, 0, offsetof (CPUState, ccc),
REG_EBP);
host_spill_regs (c, codep, M68K_CC_NONE);
i386_pushl_imm (COMMON_ARG_NAMES, US_TO_SYN68K (m68k_addr));
i386_pushl_imm (COMMON_ARG_NAMES, US_TO_SYN68K (next_addr));
i386_pushl_imm (COMMON_ARG_NAMES, 5); /* Division by zero exception. */
/* Trap. */
i386_call_abs (COMMON_ARG_NAMES, 0x1234567A); /* trap_direct. */
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE,
-4 /* Branch is relative to end of call. */
+ (int32)trap_direct,
NULL);
/* Jump to the specified address. */
i386_pushl (COMMON_ARG_NAMES, REG_EAX);
i386_call_abs (COMMON_ARG_NAMES, 0x1234567A); /* hash_lookup_code... */
backpatch_add (b, (*codep - start_code - 4) * 8, 32, TRUE,
-4 /* Branch is relative to end of call. */
+ (int32)hash_lookup_code_and_create_if_needed,
NULL);
/* Jump to the native code entry point for the code returned by
* hash_lookup_code_and_create_if_needed ().
*/
i386_addl_imm_reg (COMMON_ARG_NAMES, NATIVE_START_BYTE_OFFSET, REG_EAX);
i386_addl_imm_reg (COMMON_ARG_NAMES, 4 * 4, REG_ESP); /* Pop off args. */
i386_jmp_reg (COMMON_ARG_NAMES, REG_EAX);
/* Here's where we go if there was no problem. */
divzero_branch_end[-1] = *codep - divzero_branch_end;
*c = save;
}
/* Save the dividend in case we overflow. */
i386_pushl (COMMON_ARG_NAMES, REG_EAX);
/* The i386 cannot handle 0x80000000 / -1 without crashing, so test for
* that case and signal overflow.
*/
if (might_overflow_i386_p)
{
i386_cmpl_imm_reg (COMMON_ARG_NAMES, -1, scratch_reg);
i386_jnz (COMMON_ARG_NAMES, 5);
br_end_1 = *codep;
i386_cmpl_imm_reg (COMMON_ARG_NAMES, 0x80000000, REG_EAX);
i386_jz (COMMON_ARG_NAMES, 5);
br_end_2 = *codep;
br_end_1[-1] = *codep - br_end_1;
}
else
br_end_2 = NULL;
/* Do the divide. */
i386_cltd (COMMON_ARG_NAMES);
i386_idivl (COMMON_ARG_NAMES, scratch_reg); /* Implicitly uses %eax */
if (br_end_2 != NULL)
br_end_2[-1] = *codep - br_end_2;
/* The result of the divide is now in %eax:%edx. First we have to
* check for overflow, since the m68k leaves the operand unaffected
* if there is overflow.
*/
i386_addl_imm_reg (COMMON_ARG_NAMES, 32768, REG_EAX);
i386_testl_imm_reg (COMMON_ARG_NAMES, 0xFFFF0000, REG_EAX);
i386_jz (COMMON_ARG_NAMES, 5); /* Filled in below to skip overflow code. */
overflow_branch_end = *codep;
/* Handle the overflow. */
if (real_cc_to_compute & M68K_CC_CNVZ)
{
cc_to_compute = real_cc_to_compute;
/* N and Z are technically undefined here, but they seem to actually
* be set based on the result on the 68040.
*/
if (real_cc_to_compute & (M68K_CCC | M68K_CCN | M68K_CCZ))
{
i386_testl_reg_reg (COMMON_ARG_NAMES, REG_EAX, REG_EAX);
i386_lahf (COMMON_ARG_NAMES);
}
/* Set the V flag, if so requested. */
if (real_cc_to_compute & M68K_CCV)
{
i386_movl_imm_reg (COMMON_ARG_NAMES, 0x80000000, REG_EDX);
i386_addl_reg_reg (COMMON_ARG_NAMES, REG_EDX, REG_EDX);
}
if (real_cc_to_compute & (M68K_CCC | M68K_CCN | M68K_CCZ))
i386_sahf (COMMON_ARG_NAMES);
cc_to_compute = M68K_CC_NONE;
}
/* Restore the original dividend. */
i386_popl (COMMON_ARG_NAMES, REG_EAX);
i386_jmp (COMMON_ARG_NAMES, 5);
jmp_end = *codep;
/* Backpatch the conditional branch. */
overflow_branch_end[-1] = *codep - overflow_branch_end;
/* Now we place the low-order 16 bits of %edx into the high-order 16
* bits of %eax.
*/
i386_subl_imm_reg (COMMON_ARG_NAMES, 32768, REG_EAX);
i386_rorl_imm_reg (COMMON_ARG_NAMES, 16, REG_EAX);
i386_movw_reg_reg (COMMON_ARG_NAMES, REG_DX, REG_AX);
i386_rorl_imm_reg (COMMON_ARG_NAMES, 16, REG_EAX);
/* Pop off the saved overflow value (we didn't need it). */
i386_addl_imm_reg (COMMON_ARG_NAMES, 4, REG_ESP);
/* Set the CC bits appropriately, if so desired. */
if (real_cc_to_compute)
{
cc_to_compute = real_cc_to_compute;
i386_testw_reg_reg (COMMON_ARG_NAMES, REG_AX, REG_AX);
}
/* Backpatch the jump. */
jmp_end[-1] = *codep - jmp_end;
c->cached_cc |= real_cc_to_compute;
c->dirty_cc |= real_cc_to_compute;
return 0;
}
int
host_divsw_imm_reg (COMMON_ARGS, int32 val)
{
if (val == 0)
return 1;
i386_movl_imm_reg (COMMON_ARG_NAMES, val, scratch_reg);
return host_divsw (COMMON_ARG_NAMES, NULL, NULL, NULL, val == -1);
}
int
host_negb_abs (COMMON_ARGS, int32 dst_addr)
{
return i386_negb_abs(COMMON_ARG_NAMES, (int32) SYN68K_TO_US (dst_addr));
}
#define HOST_OP_IMM_ABS(size, op, x86_op) \
int \
host_ ## op ## size ## _imm_abs (COMMON_ARGS, int32 src, int32 dst_addr) \
{ \
return i386_ ## x86_op ## size ## _imm_abs (COMMON_ARG_NAMES, src, \
((int32) \
SYN68K_TO_US (dst_addr))); \
}
HOST_OP_IMM_ABS(b, add, add)
HOST_OP_IMM_ABS(b, sub, sub)
#define HOST_OP_REG_ABS(size, op, x86_op) \
int \
host_ ## op ## size ## _reg_abs (COMMON_ARGS, int32 src, int32 dst_addr) \
{ \
return i386_ ## x86_op ## size ## _reg_abs (COMMON_ARG_NAMES, src, \
((int32) \
SYN68K_TO_US (dst_addr))); \
}
HOST_OP_REG_ABS(b, and, and)
HOST_OP_REG_ABS(w, and, and)
HOST_OP_REG_ABS(l, and, and)
HOST_OP_REG_ABS(b, or, or)
HOST_OP_REG_ABS(w, or, or)
HOST_OP_REG_ABS(l, or, or)
HOST_OP_REG_ABS(b, xor, xor)
HOST_OP_REG_ABS(w, xor, xor)
HOST_OP_REG_ABS(l, xor, xor)
HOST_OP_REG_ABS(b, cmp, cmp)
HOST_OP_REG_ABS(w, cmp, cmp)
HOST_OP_REG_ABS(l, cmp, cmp)
HOST_OP_REG_ABS(b, add, add)
HOST_OP_REG_ABS(b, sub, sub)
HOST_OP_REG_ABS(b, move, mov)
HOST_OP_REG_ABS(w, move, mov)
HOST_OP_REG_ABS(l, move, mov)
#define HOST_OP_ABS_REG(size, op, x86_op) \
int \
host_ ## op ## size ## _abs_reg (COMMON_ARGS, int32 src_addr, int32 dst) \
{ \
return i386_ ## x86_op ## size ## _abs_reg (COMMON_ARG_NAMES, \
((int32) \
SYN68K_TO_US (src_addr)), \
dst); \
}
HOST_OP_ABS_REG(b, and, and)
HOST_OP_ABS_REG(w, and, and)
HOST_OP_ABS_REG(l, and, and)
HOST_OP_ABS_REG(b, or, or)
HOST_OP_ABS_REG(w, or, or)
HOST_OP_ABS_REG(l, or, or)
HOST_OP_ABS_REG(b, xor, xor)
HOST_OP_ABS_REG(w, xor, xor)
HOST_OP_ABS_REG(l, xor, xor)
HOST_OP_ABS_REG(b, cmp, cmp)
HOST_OP_ABS_REG(w, cmp, cmp)
HOST_OP_ABS_REG(l, cmp, cmp)
HOST_OP_ABS_REG(b, add, add)
HOST_OP_ABS_REG(b, sub, sub)
HOST_OP_ABS_REG(b, move, mov)
HOST_OP_ABS_REG(w, move, mov)
HOST_OP_ABS_REG(l, move, mov)
#define HOST_OPB_IMM_ABS(op, x86_op) \
int \
host_ ## op ## b_imm_abs (COMMON_ARGS, int32 val, int32 addr) \
{ \
return i386_ ## x86_op ## b_imm_abs (COMMON_ARG_NAMES, \
val, \
((int32) \
SYN68K_TO_US (addr))); \
}
HOST_OPB_IMM_ABS(and, and)
HOST_OPB_IMM_ABS(or , or )
HOST_OPB_IMM_ABS(xor, xor)
HOST_OPB_IMM_ABS(cmp, cmp)
#endif /* GENERATE_NATIVE_CODE */
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