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774b4bb424
cc65/src/cc65/codegen.c
cuz 774b4bb424 Some work on function stuff. 
Use xsprintf from the common directory.
Use hashstr from the common directory.


git-svn-id: svn://svn.cc65.org/cc65/trunk@36 b7a2c559-68d2-44c3-8de9-860c34a00d81
2000-06-08 20:27:05 +00:00

3712 lines
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C
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/*
* codegen.c
*
* Ullrich von Bassewitz, 08.06.1998
*/
#include <stdio.h>
#include <string.h>
#include "../common/version.h"
#include "asmcode.h"
#include "asmlabel.h"
#include "check.h"
#include "error.h"
#include "global.h"
#include "io.h"
#include "litpool.h"
#include "mem.h"
#include "optimize.h"
#include "util.h"
#include "codegen.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Compiler relative stk ptr */
int oursp = 0;
/* Current segment */
static enum { SEG_CODE, SEG_RODATA, SEG_DATA, SEG_BSS } CurSeg = SEG_CODE;
/* Segment names */
static char* SegmentNames [4];
static char* SegmentHints [4] = {
"seg:code", "seg:rodata", "seg:data", "seg:bss"
};
/*****************************************************************************/
/* Helpers */
/*****************************************************************************/
static void typeerror (unsigned type)
/* Print an error message about an invalid operand type */
{
Internal ("Invalid type in CF flags: %04X, type = %u", type, type & CF_TYPE);
}
static void CheckLocalOffs (unsigned Offs)
/* Check the offset into the stack for 8bit range */
{
if (Offs >= 256) {
/* Too many local vars */
AddCodeLine (";*** Too many locals");
Error (ERR_TOO_MANY_LOCALS);
}
}
static char* GetLabelName (unsigned flags, unsigned long label, unsigned offs)
{
static char lbuf [128]; /* Label name */
/* Create the correct label name */
switch (flags & CF_ADDRMASK) {
case CF_STATIC:
/* Static memory cell */
sprintf (lbuf, "L%04X+%u", (unsigned)(label & 0xFFFF), offs);
break;
case CF_EXTERNAL:
/* External label */
sprintf (lbuf, "_%s+%u", (char*) label, offs);
break;
case CF_ABSOLUTE:
/* Absolute address */
sprintf (lbuf, "$%04X", (unsigned)((label+offs) & 0xFFFF));
break;
case CF_REGVAR:
/* Variable in register bank */
sprintf (lbuf, "regbank+%u", (unsigned)((label+offs) & 0xFFFF));
break;
default:
Internal ("Invalid address flags");
}
/* Return a pointer to the static buffer */
return lbuf;
}
/*****************************************************************************/
/* Pre- and postamble */
/*****************************************************************************/
void g_preamble (void)
/* Generate the assembler code preamble */
{
AddCodeLine ("; File generated by cc65 v %u.%u.%u", VER_MAJOR, VER_MINOR, VER_PATCH);
AddEmptyLine ();
/* Insert some object file options */
AddCodeLine (".fopt\t\tcompiler,\"cc65 v %u.%u.%u\"", VER_MAJOR, VER_MINOR, VER_PATCH);
AddEmptyLine ();
/* Allow auto import for runtime library routines */
AddCodeLine (".autoimport\ton");
/* Switch the assembler into case sensible mode */
AddCodeLine (".case\t\ton");
/* Tell the assembler if we want to generate debug info */
AddCodeLine (".debuginfo\t%s", (DebugInfo != 0)? "on" : "off");
/* Import the stack pointer for direct auto variable access */
AddCodeLine (".importzp\tsp, sreg, regsave, regbank, tmp1, ptr1");
/* Define long branch macros */
AddCodeLine (".macpack\tlongbranch");
AddEmptyLine ();
/* Define the ldax macro */
AddCodeLine (".macro ldax Value");
AddCodeLine (" lda #<(Value)");
AddCodeLine (" ldx #>(Value)");
AddCodeLine (".endmacro");
AddEmptyLine ();
/* Define the default names for the segments */
SegmentNames [SEG_CODE] = xstrdup ("CODE");
SegmentNames [SEG_RODATA] = xstrdup ("RODATA");
SegmentNames [SEG_DATA] = xstrdup ("DATA");
SegmentNames [SEG_BSS] = xstrdup ("BSS");
/* Tell the optimizer that this is the end of the preamble */
AddCodeHint ("end_of_preamble");
}
void g_postamble (void)
/* Generate assembler code postamble */
{
/* Tell the optimizer that this is the start of the postamble */
AddCodeHint ("start_of_postamble");
}
/*****************************************************************************/
/* Segment support */
/*****************************************************************************/
static void UseSeg (unsigned NewSeg)
/* Switch to a specific segment */
{
if (CurSeg != NewSeg) {
CurSeg = NewSeg;
AddCodeLine (".segment\t\"%s\"", SegmentNames [CurSeg]);
AddCodeHint (SegmentHints [CurSeg]);
}
}
void g_usecode (void)
/* Switch to the code segment */
{
UseSeg (SEG_CODE);
}
void g_userodata (void)
/* Switch to the read only data segment */
{
UseSeg (SEG_RODATA);
}
void g_usedata (void)
/* Switch to the data segment */
{
UseSeg (SEG_DATA);
}
void g_usebss (void)
/* Switch to the bss segment */
{
UseSeg (SEG_BSS);
}
void SegName (unsigned Seg, const char* Name)
/* Set the name of a segment */
{
/* Free the old name and set a new one */
xfree (SegmentNames [Seg]);
SegmentNames [Seg] = xstrdup (Name);
/* If the new segment is the current segment, emit a segment directive
* with the new name.
*/
if (Seg == CurSeg) {
CurSeg = -1; /* Invalidate */
UseSeg (Seg);
}
}
void g_codename (const char* Name)
/* Set the name of the CODE segment */
{
SegName (SEG_CODE, Name);
}
void g_rodataname (const char* Name)
/* Set the name of the RODATA segment */
{
SegName (SEG_RODATA, Name);
}
void g_dataname (const char* Name)
/* Set the name of the DATA segment */
{
SegName (SEG_DATA, Name);
}
void g_bssname (const char* Name)
/* Set the name of the BSS segment */
{
SegName (SEG_BSS, Name);
}
/*****************************************************************************/
/* Code */
/*****************************************************************************/
unsigned sizeofarg (unsigned flags)
/* Return the size of a function argument type that is encoded in flags */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
return (flags & CF_FORCECHAR)? 1 : 2;
case CF_INT:
return 2;
case CF_LONG:
return 4;
default:
typeerror (flags);
/* NOTREACHED */
return 2;
}
}
int pop (unsigned flags)
/* Pop an argument of the given size */
{
return oursp += sizeofarg (flags);
}
int push (unsigned flags)
/* Push an argument of the given size */
{
return oursp -= sizeofarg (flags);
}
static unsigned MakeByteOffs (unsigned Flags, unsigned Offs)
/* The value in Offs is an offset to an address in a/x. Make sure, an object
* of the type given in Flags can be loaded or stored into this address by
* adding part of the offset to the address in ax, so that the remaining
* offset fits into an index register. Return the remaining offset.
*/
{
/* If the offset is too large for a byte register, add the high byte
* of the offset to the primary. Beware: We need a special correction
* if the offset in the low byte will overflow in the operation.
*/
unsigned O = Offs & ~0xFFU;
if ((Offs & 0xFF) > 256 - sizeofarg (Flags)) {
/* We need to add the low byte also */
O += Offs & 0xFF;
}
/* Do the correction if we need one */
if (O != 0) {
g_inc (CF_INT | CF_CONST, O);
Offs -= O;
}
/* Return the new offset */
return Offs;
}
/*****************************************************************************/
/* Functions handling local labels */
/*****************************************************************************/
void g_defloclabel (unsigned label)
/* Define a local label */
{
AddCodeLine ("L%04X:", label & 0xFFFF);
}
/*****************************************************************************/
/* Functions handling global labels */
/*****************************************************************************/
void g_defgloblabel (const char* Name)
/* Define a global label with the given name */
{
AddCodeLine ("_%s:", Name);
}
void g_defexport (const char* Name, int ZP)
/* Export the given label */
{
if (ZP) {
AddCodeLine ("\t.exportzp\t_%s", Name);
} else {
AddCodeLine ("\t.export\t\t_%s", Name);
}
}
void g_defimport (const char* Name, int ZP)
/* Import the given label */
{
if (ZP) {
AddCodeLine ("\t.importzp\t_%s", Name);
} else {
AddCodeLine ("\t.import\t\t_%s", Name);
}
}
/*****************************************************************************/
/* Load functions for various registers */
/*****************************************************************************/
static void ldaconst (unsigned val)
/* Load a with a constant */
{
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
}
static void ldxconst (unsigned val)
/* Load x with a constant */
{
AddCodeLine ("\tldx\t#$%02X", val & 0xFF);
}
static void ldyconst (unsigned val)
/* Load y with a constant */
{
AddCodeLine ("\tldy\t#$%02X", val & 0xFF);
}
/*****************************************************************************/
/* Function entry and exit */
/*****************************************************************************/
/* Remember the argument size of a function. The variable is set by g_enter
* and used by g_leave. If the functions gets its argument size by the caller
* (variable param list or function without prototype), g_enter will set the
* value to -1.
*/
static int funcargs;
void g_enter (unsigned flags, unsigned argsize)
/* Function prologue */
{
if ((flags & CF_FIXARGC) != 0) {
/* Just remember the argument size for the leave */
funcargs = argsize;
} else {
funcargs = -1;
AddCodeLine ("\tjsr\tenter");
}
}
void g_leave (int flags, int val)
/* Function epilogue */
{
int k;
char buf [40];
/* How many bytes of locals do we have to drop? */
k = -oursp;
/* If we didn't have a variable argument list, don't call leave */
if (funcargs >= 0) {
/* Load a function return code if needed */
if ((flags & CF_CONST) != 0) {
g_getimmed (flags, val, 0);
}
/* Drop stackframe or leave with rts */
k += funcargs;
if (k == 0) {
AddCodeLine ("\trts");
} else if (k <= 8) {
AddCodeLine ("\tjmp\tincsp%d", k);
} else {
CheckLocalOffs (k);
ldyconst (k);
AddCodeLine ("\tjmp\taddysp");
}
} else {
strcpy (buf, "\tjmp\tleave");
if (k) {
/* We've a stack frame to drop */
ldyconst (k);
strcat (buf, "y");
}
if (flags & CF_CONST) {
if ((flags & CF_TYPE) != CF_LONG) {
/* Constant int sized value given for return code */
if (val == 0) {
/* Special case: return 0 */
strcat (buf, "00");
} else if (((val >> 8) & 0xFF) == 0) {
/* Special case: constant with high byte zero */
ldaconst (val); /* Load low byte */
strcat (buf, "0");
} else {
/* Others: arbitrary constant value */
g_getimmed (flags, val, 0); /* Load value */
}
} else {
/* Constant long value: No shortcut possible */
g_getimmed (flags, val, 0);
}
}
/* Output the jump */
AddCodeLine (buf);
}
/* Add an empty line after a function to make the code more readable */
AddEmptyLine ();
}
/*****************************************************************************/
/* Register variables */
/*****************************************************************************/
void g_save_regvars (int RegOffs, unsigned Bytes)
/* Save register variables */
{
/* Don't loop for up to two bytes */
if (Bytes == 1) {
AddCodeLine ("\tlda\tregbank%+d", RegOffs);
AddCodeLine ("\tjsr\tpusha");
} else if (Bytes == 2) {
AddCodeLine ("\tlda\tregbank%+d", RegOffs);
AddCodeLine ("\tldx\tregbank%+d", RegOffs+1);
AddCodeLine ("\tjsr\tpushax");
} else {
/* More than two bytes - loop */
unsigned Label = GetLabel ();
g_space (Bytes);
ldyconst (Bytes - 1);
ldxconst (Bytes);
g_defloclabel (Label);
AddCodeLine ("\tlda\tregbank%+d,x", RegOffs-1);
AddCodeLine ("\tsta\t(sp),y");
AddCodeLine ("\tdey");
AddCodeLine ("\tdex");
AddCodeLine ("\tbne\tL%04X", Label);
}
/* We pushed stuff, correct the stack pointer */
oursp -= Bytes;
}
void g_restore_regvars (int StackOffs, int RegOffs, unsigned Bytes)
/* Restore register variables */
{
/* Calculate the actual stack offset and check it */
StackOffs -= oursp;
CheckLocalOffs (StackOffs);
/* Don't loop for up to two bytes */
if (Bytes == 1) {
ldyconst (StackOffs);
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\tsta\tregbank%+d", RegOffs);
} else if (Bytes == 2) {
ldyconst (StackOffs);
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\tsta\tregbank%+d", RegOffs);
AddCodeLine ("\tiny");
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\tsta\tregbank%+d", RegOffs+1);
} else {
/* More than two bytes - loop */
unsigned Label = GetLabel ();
ldyconst (StackOffs+Bytes-1);
ldxconst (Bytes);
g_defloclabel (Label);
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\tsta\tregbank%+d,x", RegOffs-1);
AddCodeLine ("\tdey");
AddCodeLine ("\tdex");
AddCodeLine ("\tbne\tL%04X", Label);
}
}
/*****************************************************************************/
/* Fetching memory cells */
/*****************************************************************************/
void g_getimmed (unsigned flags, unsigned long val, unsigned offs)
/* Load a constant into the primary register */
{
if ((flags & CF_CONST) != 0) {
/* Numeric constant */
switch (flags & CF_TYPE) {
case CF_CHAR:
if ((flags & CF_FORCECHAR) != 0) {
ldaconst (val);
break;
}
/* FALL THROUGH */
case CF_INT:
ldxconst ((val >> 8) & 0xFF);
ldaconst (val & 0xFF);
break;
case CF_LONG:
if (val < 0x100) {
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tstx\tsreg+1");
AddCodeLine ("\tstx\tsreg");
AddCodeLine ("\tlda\t#$%02X", (unsigned char) val);
} else if ((val & 0xFFFF00FF) == 0) {
AddCodeLine ("\tlda\t#$00");
AddCodeLine ("\tsta\tsreg+1");
AddCodeLine ("\tsta\tsreg");
AddCodeLine ("\tldx\t#$%02X", (unsigned char) (val >> 8));
} else if ((val & 0xFFFF0000) == 0 && FavourSize == 0) {
AddCodeLine ("\tlda\t#$00");
AddCodeLine ("\tsta\tsreg+1");
AddCodeLine ("\tsta\tsreg");
AddCodeLine ("\tlda\t#$%02X", (unsigned char) val);
AddCodeLine ("\tldx\t#$%02X", (unsigned char) (val >> 8));
} else if ((val & 0xFFFFFF00) == 0xFFFFFF00) {
AddCodeLine ("\tldx\t#$FF");
AddCodeLine ("\tstx\tsreg+1");
AddCodeLine ("\tstx\tsreg");
if ((val & 0xFF) == 0xFF) {
AddCodeLine ("\ttxa");
} else {
AddCodeLine ("\tlda\t#$%02X", (unsigned char) val);
}
} else if ((val & 0xFFFF00FF) == 0xFFFF00FF) {
AddCodeLine ("\tlda\t#$FF");
AddCodeLine ("\tsta\tsreg+1");
AddCodeLine ("\tsta\tsreg");
AddCodeLine ("\tldx\t#$%02X", (unsigned char) (val >> 8));
} else {
/* Call a subroutine that will load following value */
AddCodeLine ("\tjsr\tldeax");
AddCodeLine ("\t.dword\t$%08lX", val & 0xFFFFFFFF);
}
break;
default:
typeerror (flags);
break;
}
} else {
/* Some sort of label */
const char* Label = GetLabelName (flags, val, offs);
/* Load the address into the primary */
AddCodeLine ("\tldax\t%s", Label);
}
}
void g_getstatic (unsigned flags, unsigned long label, unsigned offs)
/* Fetch an static memory cell into the primary register */
{
/* Create the correct label name */
char* lbuf = GetLabelName (flags, label, offs);
/* Check the size and generate the correct load operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if ((flags & CF_FORCECHAR) || (flags & CF_TEST)) {
AddCodeLine ("\tlda\t%s", lbuf); /* load A from the label */
} else {
ldxconst (0);
AddCodeLine ("\tlda\t%s", lbuf); /* load A from the label */
if (!(flags & CF_UNSIGNED)) {
/* Must sign extend */
AddCodeLine ("\tbpl\t*+3");
AddCodeLine ("\tdex");
AddCodeHint ("x:!"); /* X is invalid now */
}
}
break;
case CF_INT:
AddCodeLine ("\tlda\t%s", lbuf);
if (flags & CF_TEST) {
AddCodeLine ("\tora\t%s+1", lbuf);
} else {
AddCodeLine ("\tldx\t%s+1", lbuf);
}
break;
case CF_LONG:
if (flags & CF_TEST) {
AddCodeLine ("\tlda\t%s+3", lbuf);
AddCodeLine ("\tora\t%s+2", lbuf);
AddCodeLine ("\tora\t%s+1", lbuf);
AddCodeLine ("\tora\t%s+0", lbuf);
} else {
AddCodeLine ("\tlda\t%s+3", lbuf);
AddCodeLine ("\tsta\tsreg+1");
AddCodeLine ("\tlda\t%s+2", lbuf);
AddCodeLine ("\tsta\tsreg");
AddCodeLine ("\tldx\t%s+1", lbuf);
AddCodeLine ("\tlda\t%s", lbuf);
}
break;
default:
typeerror (flags);
}
}
void g_getlocal (unsigned flags, int offs)
/* Fetch specified local object (local var). */
{
offs -= oursp;
CheckLocalOffs (offs);
switch (flags & CF_TYPE) {
case CF_CHAR:
if ((flags & CF_FORCECHAR) || (flags & CF_TEST)) {
ldyconst (offs);
AddCodeLine ("\tlda\t(sp),y");
} else {
if (offs == 0) {
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tlda\t(sp,x)");
} else {
ldyconst (offs);
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tlda\t(sp),y");
}
if ((flags & CF_UNSIGNED) == 0) {
AddCodeLine ("\tbpl\t*+3");
AddCodeLine ("\tdex");
AddCodeHint ("x:!"); /* X is invalid now */
}
}
break;
case CF_INT:
CheckLocalOffs (offs + 1);
if (flags & CF_TEST) {
ldyconst (offs + 1);
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\tdey");
AddCodeLine ("\tora\t(sp),y");
} else {
if (FavourSize) {
if (offs) {
ldyconst (offs+1);
AddCodeLine ("\tjsr\tldaxysp");
} else {
AddCodeLine ("\tjsr\tldax0sp");
}
} else {
ldyconst (offs + 1);
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\ttax");
AddCodeLine ("\tdey");
AddCodeLine ("\tlda\t(sp),y");
}
}
break;
case CF_LONG:
if (offs) {
ldyconst (offs+3);
AddCodeLine ("\tjsr\tldeaxysp");
} else {
AddCodeLine ("\tjsr\tldeax0sp");
}
break;
default:
typeerror (flags);
}
}
void g_getind (unsigned flags, unsigned offs)
/* Fetch the specified object type indirect through the primary register
* into the primary register
*/
{
/* If the offset is greater than 255, add the part that is > 255 to
* the primary. This way we get an easy addition and use the low byte
* as the offset
*/
offs = MakeByteOffs (flags, offs);
/* Handle the indirect fetch */
switch (flags & CF_TYPE) {
case CF_CHAR:
/* Character sized */
if (offs) {
ldyconst (offs);
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tldauidx");
} else {
AddCodeLine ("\tjsr\tldaidx");
}
} else {
if (flags & CF_UNSIGNED) {
if (FavourSize) {
AddCodeLine ("\tjsr\tldaui");
} else {
AddCodeLine ("\tsta\tptr1");
AddCodeLine ("\tstx\tptr1+1");
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tlda\t(ptr1,x)");
}
} else {
AddCodeLine ("\tjsr\tldai");
}
}
break;
case CF_INT:
if (flags & CF_TEST) {
ldyconst (offs);
AddCodeLine ("\tsta\tptr1");
AddCodeLine ("\tstx\tptr1+1");
AddCodeLine ("\tlda\t(ptr1),y");
AddCodeLine ("\tiny");
AddCodeLine ("\tora\t(ptr1),y");
} else {
if (offs == 0) {
AddCodeLine ("\tjsr\tldaxi");
} else {
ldyconst (offs+1);
AddCodeLine ("\tjsr\tldaxidx");
}
}
break;
case CF_LONG:
if (offs == 0) {
AddCodeLine ("\tjsr\tldeaxi");
} else {
ldyconst (offs+3);
AddCodeLine ("\tjsr\tldeaxidx");
}
if (flags & CF_TEST) {
AddCodeLine ("\tjsr\ttsteax");
}
break;
default:
typeerror (flags);
}
}
void g_leasp (int offs)
/* Fetch the address of the specified symbol into the primary register */
{
/* Calculate the offset relative to sp */
offs -= oursp;
/* For value 0 we do direct code */
if (offs == 0) {
AddCodeLine ("\tlda\tsp");
AddCodeLine ("\tldx\tsp+1");
} else {
if (FavourSize) {
ldyconst (offs); /* Load Y with offset value */
AddCodeLine ("\tjsr\tleaysp"); /* Load effective address */
} else {
ldaconst (offs);
AddCodeLine ("\tclc");
AddCodeLine ("\tldx\tsp+1");
AddCodeLine ("\tadc\tsp");
AddCodeLine ("\tbcc\t*+3");
AddCodeLine ("\tinx");
AddCodeHint ("x:!"); /* Invalidate X */
}
}
}
/*****************************************************************************/
/* Store into memory */
/*****************************************************************************/
void g_putstatic (unsigned flags, unsigned long label, unsigned offs)
/* Store the primary register into the specified static memory cell */
{
/* Create the correct label name */
char* lbuf = GetLabelName (flags, label, offs);
/* Check the size and generate the correct store operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
AddCodeLine ("\tsta\t%s", lbuf);
break;
case CF_INT:
AddCodeLine ("\tsta\t%s", lbuf);
AddCodeLine ("\tstx\t%s+1", lbuf);
break;
case CF_LONG:
AddCodeLine ("\tsta\t%s", lbuf);
AddCodeLine ("\tstx\t%s+1", lbuf);
AddCodeLine ("\tldy\tsreg");
AddCodeLine ("\tsty\t%s+2", lbuf);
AddCodeLine ("\tldy\tsreg+1");
AddCodeLine ("\tsty\t%s+3", lbuf);
break;
default:
typeerror (flags);
}
}
void g_putlocal (unsigned flags, int offs)
/* Put data into local object. */
{
offs -= oursp;
CheckLocalOffs (offs);
switch (flags & CF_TYPE) {
case CF_CHAR:
ldyconst (offs);
AddCodeLine ("\tsta\t(sp),y");
break;
case CF_INT:
if (offs) {
ldyconst (offs);
AddCodeLine ("\tjsr\tstaxysp");
} else {
AddCodeLine ("\tjsr\tstax0sp");
}
break;
case CF_LONG:
if (offs) {
ldyconst (offs);
AddCodeLine ("\tjsr\tsteaxysp");
} else {
AddCodeLine ("\tjsr\tsteax0sp");
}
break;
default:
typeerror (flags);
}
}
void g_putind (unsigned flags, unsigned offs)
/* Store the specified object type in the primary register at the address
* on the top of the stack
*/
{
/* We cannot currently handle more than byte sized offsets */
if (offs > 256 - sizeofarg (flags)) {
Internal ("g_putind: Large offsets not implemented");
}
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (offs) {
ldyconst (offs);
AddCodeLine ("\tjsr\tstaspidx");
} else {
AddCodeLine ("\tjsr\tstaspp");
}
break;
case CF_INT:
if (offs) {
ldyconst (offs);
AddCodeLine ("\tjsr\tstaxspidx");
} else {
AddCodeLine ("\tjsr\tstaxspp");
}
break;
case CF_LONG:
if (offs) {
ldyconst (offs);
AddCodeLine ("\tjsr\tsteaxspidx");
} else {
AddCodeLine ("\tjsr\tsteaxspp");
}
break;
default:
typeerror (flags);
}
/* Pop the argument which is always a pointer */
pop (CF_PTR);
}
/*****************************************************************************/
/* type conversion and similiar stuff */
/*****************************************************************************/
void g_toslong (unsigned flags)
/* Make sure, the value on TOS is a long. Convert if necessary */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\ttosulong");
} else {
AddCodeLine ("\tjsr\ttoslong");
}
push (CF_INT);
break;
case CF_LONG:
break;
default:
typeerror (flags);
}
}
void g_tosint (unsigned flags)
/* Make sure, the value on TOS is an int. Convert if necessary */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
break;
case CF_LONG:
AddCodeLine ("\tjsr\ttosint");
pop (CF_INT);
break;
default:
typeerror (flags);
}
}
void g_reglong (unsigned flags)
/* Make sure, the value in the primary register a long. Convert if necessary */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
if (flags & CF_UNSIGNED) {
if (FavourSize) {
AddCodeLine ("\tjsr\taxulong");
} else {
ldyconst (0);
AddCodeLine ("\tsty\tsreg");
AddCodeLine ("\tsty\tsreg+1");
}
} else {
AddCodeLine ("\tjsr\taxlong");
}
break;
case CF_LONG:
break;
default:
typeerror (flags);
}
}
unsigned g_typeadjust (unsigned lhs, unsigned rhs)
/* Adjust the integer operands before doing a binary operation. lhs is a flags
* value, that corresponds to the value on TOS, rhs corresponds to the value
* in (e)ax. The return value is the the flags value for the resulting type.
*/
{
unsigned ltype, rtype;
unsigned result;
/* Get the type spec from the flags */
ltype = lhs & CF_TYPE;
rtype = rhs & CF_TYPE;
/* Check if a conversion is needed */
if (ltype == CF_LONG && rtype != CF_LONG && (rhs & CF_CONST) == 0) {
/* We must promote the primary register to long */
g_reglong (rhs);
/* Get the new rhs type */
rhs = (rhs & ~CF_TYPE) | CF_LONG;
rtype = CF_LONG;
} else if (ltype != CF_LONG && (lhs & CF_CONST) == 0 && rtype == CF_LONG) {
/* We must promote the lhs to long */
if (lhs & CF_REG) {
g_reglong (lhs);
} else {
g_toslong (lhs);
}
/* Get the new rhs type */
lhs = (lhs & ~CF_TYPE) | CF_LONG;
ltype = CF_LONG;
}
/* Determine the result type for the operation:
* - The result is const if both operands are const.
* - The result is unsigned if one of the operands is unsigned.
* - The result is long if one of the operands is long.
* - Otherwise the result is int sized.
*/
result = (lhs & CF_CONST) & (rhs & CF_CONST);
result |= (lhs & CF_UNSIGNED) | (rhs & CF_UNSIGNED);
if (rtype == CF_LONG || ltype == CF_LONG) {
result |= CF_LONG;
} else {
result |= CF_INT;
}
return result;
}
unsigned g_typecast (unsigned lhs, unsigned rhs)
/* Cast the value in the primary register to the operand size that is flagged
* by the lhs value. Return the result value.
*/
{
unsigned ltype, rtype;
/* Get the type spec from the flags */
ltype = lhs & CF_TYPE;
rtype = rhs & CF_TYPE;
/* Check if a conversion is needed */
if (ltype == CF_LONG && rtype != CF_LONG && (rhs & CF_CONST) == 0) {
/* We must promote the primary register to long */
g_reglong (rhs);
}
/* Do not need any other action. If the left type is int, and the primary
* register is long, it will be automagically truncated. If the right hand
* side is const, it is not located in the primary register and handled by
* the expression parser code.
*/
/* Result is const if the right hand side was const */
lhs |= (rhs & CF_CONST);
/* The resulting type is that of the left hand side (that's why you called
* this function :-)
*/
return lhs;
}
void g_scale (unsigned flags, long val)
/* Scale the value in the primary register by the given value. If val is positive,
* scale up, is val is negative, scale down. This function is used to scale
* the operands or results of pointer arithmetic by the size of the type, the
* pointer points to.
*/
{
int p2;
/* Value may not be zero */
if (val == 0) {
Internal ("Data type has no size");
} else if (val > 0) {
/* Scale up */
if ((p2 = powerof2 (val)) > 0 && p2 <= 3) {
/* Factor is 2, 4 or 8, use special function */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
while (p2--) {
AddCodeLine ("\tasl\ta");
}
break;
}
/* FALLTHROUGH */
case CF_INT:
if (FavourSize || p2 >= 3) {
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tshlax%d", p2);
} else {
AddCodeLine ("\tjsr\taslax%d", p2);
}
} else {
AddCodeLine ("\tstx\ttmp1");
while (p2--) {
AddCodeLine ("\tasl\ta");
AddCodeLine ("\trol\ttmp1");
}
AddCodeLine ("\tldx\ttmp1");
}
break;
case CF_LONG:
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tshleax%d", p2);
} else {
AddCodeLine ("\tjsr\tasleax%d", p2);
}
break;
default:
typeerror (flags);
}
} else if (val != 1) {
/* Use a multiplication instead */
g_mul (flags | CF_CONST, val);
}
} else {
/* Scale down */
val = -val;
if ((p2 = powerof2 (val)) > 0 && p2 <= 3) {
/* Factor is 2, 4 or 8, use special function */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
if (flags & CF_UNSIGNED) {
while (p2--) {
AddCodeLine ("\tlsr\ta");
}
break;
} else if (p2 <= 2) {
AddCodeLine ("\tcmp\t#$80");
AddCodeLine ("\tror\ta");
break;
}
}
/* FALLTHROUGH */
case CF_INT:
if (flags & CF_UNSIGNED) {
if (FavourSize || p2 >= 3) {
AddCodeLine ("\tjsr\tlsrax%d", p2);
} else {
AddCodeLine ("\tstx\ttmp1");
while (p2--) {
AddCodeLine ("\tlsr\ttmp1");
AddCodeLine ("\tror\ta");
}
AddCodeLine ("\tldx\ttmp1");
}
} else {
if (FavourSize || p2 >= 3) {
AddCodeLine ("\tjsr\tasrax%d", p2);
} else {
AddCodeLine ("\tstx\ttmp1");
while (p2--) {
AddCodeLine ("\tcpx\t#$80");
AddCodeLine ("\tror\ttmp1");
AddCodeLine ("\tror\ta");
}
AddCodeLine ("\tldx\ttmp1");
}
}
break;
case CF_LONG:
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tlsreax%d", p2);
} else {
AddCodeLine ("\tjsr\tasreax%d", p2);
}
break;
default:
typeerror (flags);
}
} else if (val != 1) {
/* Use a division instead */
g_div (flags | CF_CONST, val);
}
}
}
/*****************************************************************************/
/* Adds and subs of variables fix a fixed address */
/*****************************************************************************/
void g_addlocal (unsigned flags, int offs)
/* Add a local variable to ax */
{
/* Correct the offset and check it */
offs -= oursp;
CheckLocalOffs (offs);
switch (flags & CF_TYPE) {
case CF_CHAR:
AddCodeLine ("\tldy\t#$%02X", offs & 0xFF);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t(sp),y");
AddCodeLine ("\tbcc\t*+3");
AddCodeLine ("\tinx");
AddCodeHint ("x:!");
break;
case CF_INT:
AddCodeLine ("\tldy\t#$%02X", offs & 0xFF);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t(sp),y");
AddCodeLine ("\tpha");
AddCodeLine ("\ttxa");
AddCodeLine ("\tiny");
AddCodeLine ("\tadc\t(sp),y");
AddCodeLine ("\ttax");
AddCodeLine ("\tpla");
break;
case CF_LONG:
/* Do it the old way */
g_push (flags, 0);
g_getlocal (flags, offs);
g_add (flags, 0);
break;
default:
typeerror (flags);
}
}
void g_addstatic (unsigned flags, unsigned long label, unsigned offs)
/* Add a static variable to ax */
{
/* Create the correct label name */
char* lbuf = GetLabelName (flags, label, offs);
switch (flags & CF_TYPE) {
case CF_CHAR:
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t%s", lbuf);
AddCodeLine ("\tbcc\t*+3");
AddCodeLine ("\tinx");
AddCodeHint ("x:!");
break;
case CF_INT:
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t%s", lbuf);
AddCodeLine ("\ttay");
AddCodeLine ("\ttxa");
AddCodeLine ("\tadc\t%s+1", lbuf);
AddCodeLine ("\ttax");
AddCodeLine ("\ttya");
break;
case CF_LONG:
/* Do it the old way */
g_push (flags, 0);
g_getstatic (flags, label, offs);
g_add (flags, 0);
break;
default:
typeerror (flags);
}
}
/*****************************************************************************/
/* Compares of ax with a variable with fixed address */
/*****************************************************************************/
void g_cmplocal (unsigned flags, int offs)
/* Compare a local variable to ax */
{
Internal ("g_cmplocal not implemented");
}
void g_cmpstatic (unsigned flags, unsigned label, unsigned offs)
/* Compare a static variable to ax */
{
Internal ("g_cmpstatic not implemented");
}
/*****************************************************************************/
/* Special op= functions */
/*****************************************************************************/
void g_addeqstatic (unsigned flags, unsigned long label, unsigned offs,
unsigned long val)
/* Emit += for a static variable */
{
/* Create the correct label name */
char* lbuf = GetLabelName (flags, label, offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tldx\t#$00");
if (flags & CF_CONST) {
if (val == 1) {
AddCodeLine ("\tinc\t%s", lbuf);
AddCodeLine ("\tlda\t%s", lbuf);
} else {
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t%s", lbuf);
AddCodeLine ("\tsta\t%s", lbuf);
}
} else {
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t%s", lbuf);
AddCodeLine ("\tsta\t%s", lbuf);
}
if ((flags & CF_UNSIGNED) == 0) {
AddCodeLine ("\tbpl\t*+3");
AddCodeLine ("\tdex");
AddCodeHint ("x:!"); /* Invalidate X */
}
break;
}
/* FALLTHROUGH */
case CF_INT:
if (flags & CF_CONST) {
if (val == 1) {
label = GetLabel ();
AddCodeLine ("\tinc\t%s", lbuf);
AddCodeLine ("\tbne\tL%04X", label);
AddCodeLine ("\tinc\t%s+1", lbuf);
g_defloclabel (label);
AddCodeLine ("\tlda\t%s", lbuf); /* Hmmm... */
AddCodeLine ("\tldx\t%s+1", lbuf);
} else {
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t%s", lbuf);
AddCodeLine ("\tsta\t%s", lbuf);
if (val < 0x100) {
label = GetLabel ();
AddCodeLine ("\tbcc\tL%04X", label);
AddCodeLine ("\tinc\t%s+1", lbuf);
g_defloclabel (label);
AddCodeLine ("\tldx\t%s+1", lbuf);
} else {
AddCodeLine ("\tlda\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tadc\t%s+1", lbuf);
AddCodeLine ("\tsta\t%s+1", lbuf);
AddCodeLine ("\ttax");
AddCodeLine ("\tlda\t%s", lbuf);
}
}
} else {
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t%s", lbuf);
AddCodeLine ("\tsta\t%s", lbuf);
AddCodeLine ("\ttxa");
AddCodeLine ("\tadc\t%s+1", lbuf);
AddCodeLine ("\tsta\t%s+1", lbuf);
AddCodeLine ("\ttax");
AddCodeLine ("\tlda\t%s", lbuf);
}
break;
case CF_LONG:
if (flags & CF_CONST) {
if (val < 0x100) {
AddCodeLine ("\tldy\t#<(%s)", lbuf);
AddCodeLine ("\tsty\tptr1");
AddCodeLine ("\tldy\t#>(%s+1)", lbuf);
if (val == 1) {
AddCodeLine ("\tjsr\tladdeq1");
} else {
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tladdeqa");
}
} else {
g_getstatic (flags, label, offs);
g_inc (flags, val);
g_putstatic (flags, label, offs);
}
} else {
AddCodeLine ("\tldy\t#<(%s)", lbuf);
AddCodeLine ("\tsty\tptr1");
AddCodeLine ("\tldy\t#>(%s+1)", lbuf);
AddCodeLine ("\tjsr\tladdeq");
}
break;
default:
typeerror (flags);
}
}
void g_addeqlocal (unsigned flags, int offs, unsigned long val)
/* Emit += for a local variable */
{
/* Calculate the true offset, check it, load it into Y */
offs -= oursp;
CheckLocalOffs (offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
if (offs == 0) {
AddCodeLine ("\tldx\t#$00");
if (flags & CF_CONST) {
AddCodeLine ("\tclc");
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tadc\t(sp,x)");
AddCodeLine ("\tsta\t(sp,x)");
} else {
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t(sp,x)");
AddCodeLine ("\tsta\t(sp,x)");
}
} else {
ldyconst (offs);
AddCodeLine ("\tldx\t#$00");
if (flags & CF_CONST) {
AddCodeLine ("\tclc");
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tadc\t(sp),y");
AddCodeLine ("\tsta\t(sp),y");
} else {
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t(sp),y");
AddCodeLine ("\tsta\t(sp),y");
}
}
if ((flags & CF_UNSIGNED) == 0) {
AddCodeLine ("\tbpl\t*+3");
AddCodeLine ("\tdex");
AddCodeHint ("x:!"); /* Invalidate X */
}
break;
}
/* FALLTHROUGH */
case CF_INT:
if (flags & CF_CONST) {
g_getimmed (flags, val, 0);
}
if (offs == 0) {
AddCodeLine ("\tjsr\taddeq0sp");
} else {
ldyconst (offs);
AddCodeLine ("\tjsr\taddeqysp");
}
break;
case CF_LONG:
if (flags & CF_CONST) {
g_getimmed (flags, val, 0);
}
if (offs == 0) {
AddCodeLine ("\tjsr\tladdeq0sp");
} else {
ldyconst (offs);
AddCodeLine ("\tjsr\tladdeqysp");
}
break;
default:
typeerror (flags);
}
}
void g_addeqind (unsigned flags, unsigned offs, unsigned long val)
/* Emit += for the location with address in ax */
{
/* If the offset is too large for a byte register, add the high byte
* of the offset to the primary. Beware: We need a special correction
* if the offset in the low byte will overflow in the operation.
*/
offs = MakeByteOffs (flags, offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
AddCodeLine ("\tsta\tptr1");
AddCodeLine ("\tstx\tptr1+1");
if (offs == 0) {
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t(ptr1,x)");
AddCodeLine ("\tsta\t(ptr1,x)");
} else {
AddCodeLine ("\tldy\t#$%02X", offs);
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t(ptr1),y");
AddCodeLine ("\tsta\t(ptr1),y");
}
break;
case CF_INT:
if (!FavourSize) {
/* Lots of code, use only if size is not important */
AddCodeLine ("\tsta\tptr1");
AddCodeLine ("\tstx\tptr1+1");
AddCodeLine ("\tldy\t#$%02X", offs);
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t(ptr1),y");
AddCodeLine ("\tsta\t(ptr1),y");
AddCodeLine ("\tpha");
AddCodeLine ("\tiny");
AddCodeLine ("\tlda\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tadc\t(ptr1),y");
AddCodeLine ("\tsta\t(ptr1),y");
AddCodeLine ("\ttax");
AddCodeLine ("\tpla");
break;
}
/* FALL THROUGH */
case CF_LONG:
AddCodeLine ("\tjsr\tpushax"); /* Push the address */
push (flags); /* Correct the internal sp */
g_getind (flags, offs); /* Fetch the value */
g_inc (flags, val); /* Increment value in primary */
g_putind (flags, offs); /* Store the value back */
break;
default:
typeerror (flags);
}
}
void g_subeqstatic (unsigned flags, unsigned long label, unsigned offs,
unsigned long val)
/* Emit -= for a static variable */
{
/* Create the correct label name */
char* lbuf = GetLabelName (flags, label, offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tldx\t#$00");
if (flags & CF_CONST) {
if (val == 1) {
AddCodeLine ("\tdec\t%s", lbuf);
AddCodeLine ("\tlda\t%s", lbuf);
} else {
AddCodeLine ("\tsec");
AddCodeLine ("\tlda\t%s", lbuf);
AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
AddCodeLine ("\tsta\t%s", lbuf);
}
} else {
AddCodeLine ("\tsec");
AddCodeLine ("\tsta\ttmp1");
AddCodeLine ("\tlda\t%s", lbuf);
AddCodeLine ("\tsbc\ttmp1");
AddCodeLine ("\tsta\t%s", lbuf);
}
if ((flags & CF_UNSIGNED) == 0) {
AddCodeLine ("\tbpl\t*+3");
AddCodeLine ("\tdex");
AddCodeHint ("x:!"); /* Invalidate X */
}
break;
}
/* FALLTHROUGH */
case CF_INT:
AddCodeLine ("\tsec");
if (flags & CF_CONST) {
AddCodeLine ("\tlda\t%s", lbuf);
AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
AddCodeLine ("\tsta\t%s", lbuf);
if (val < 0x100) {
label = GetLabel ();
AddCodeLine ("\tbcs\tL%04X", label);
AddCodeLine ("\tdec\t%s+1", lbuf);
g_defloclabel (label);
AddCodeLine ("\tldx\t%s+1", lbuf);
} else {
AddCodeLine ("\tlda\t%s+1", lbuf);
AddCodeLine ("\tsbc\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tsta\t%s+1", lbuf);
AddCodeLine ("\ttax");
AddCodeLine ("\tlda\t%s", lbuf);
}
} else {
AddCodeLine ("\tsta\ttmp1");
AddCodeLine ("\tlda\t%s", lbuf);
AddCodeLine ("\tsbc\ttmp1");
AddCodeLine ("\tsta\t%s", lbuf);
AddCodeLine ("\tstx\ttmp1");
AddCodeLine ("\tlda\t%s+1", lbuf);
AddCodeLine ("\tsbc\ttmp1");
AddCodeLine ("\tsta\t%s+1", lbuf);
AddCodeLine ("\ttax");
AddCodeLine ("\tlda\t%s", lbuf);
}
break;
case CF_LONG:
if (flags & CF_CONST) {
if (val < 0x100) {
AddCodeLine ("\tldy\t#<(%s)", lbuf);
AddCodeLine ("\tsty\tptr1");
AddCodeLine ("\tldy\t#>(%s+1)", lbuf);
if (val == 1) {
AddCodeLine ("\tjsr\tlsubeq1");
} else {
AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tlsubeqa");
}
} else {
g_getstatic (flags, label, offs);
g_dec (flags, val);
g_putstatic (flags, label, offs);
}
} else {
AddCodeLine ("\tldy\t#<(%s)", lbuf);
AddCodeLine ("\tsty\tptr1");
AddCodeLine ("\tldy\t#>(%s+1)", lbuf);
AddCodeLine ("\tjsr\tlsubeq");
}
break;
default:
typeerror (flags);
}
}
void g_subeqlocal (unsigned flags, int offs, unsigned long val)
/* Emit -= for a local variable */
{
/* Calculate the true offset, check it, load it into Y */
offs -= oursp;
CheckLocalOffs (offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
ldyconst (offs);
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tsec");
if (flags & CF_CONST) {
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
} else {
AddCodeLine ("\tsta\ttmp1");
AddCodeLine ("\tlda\t(sp),y");
AddCodeLine ("\tsbc\ttmp1");
}
AddCodeLine ("\tsta\t(sp),y");
if ((flags & CF_UNSIGNED) == 0) {
AddCodeLine ("\tbpl\t*+3");
AddCodeLine ("\tdex");
AddCodeHint ("x:!"); /* Invalidate X */
}
break;
}
/* FALLTHROUGH */
case CF_INT:
if (flags & CF_CONST) {
g_getimmed (flags, val, 0);
}
if (offs == 0) {
AddCodeLine ("\tjsr\tsubeq0sp");
} else {
ldyconst (offs);
AddCodeLine ("\tjsr\tsubeqysp");
}
break;
case CF_LONG:
if (flags & CF_CONST) {
g_getimmed (flags, val, 0);
}
if (offs == 0) {
AddCodeLine ("\tjsr\tlsubeq0sp");
} else {
ldyconst (offs);
AddCodeLine ("\tjsr\tlsubeqysp");
}
break;
default:
typeerror (flags);
}
}
void g_subeqind (unsigned flags, unsigned offs, unsigned long val)
/* Emit -= for the location with address in ax */
{
/* If the offset is too large for a byte register, add the high byte
* of the offset to the primary. Beware: We need a special correction
* if the offset in the low byte will overflow in the operation.
*/
offs = MakeByteOffs (flags, offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
AddCodeLine ("\tsta\tptr1");
AddCodeLine ("\tstx\tptr1+1");
if (offs == 0) {
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tlda\t(ptr1,x)");
AddCodeLine ("\tsec");
AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
AddCodeLine ("\tsta\t(ptr1,x)");
} else {
AddCodeLine ("\tldy\t#$%02X", offs);
AddCodeLine ("\tldx\t#$00");
AddCodeLine ("\tlda\t(ptr1),y");
AddCodeLine ("\tsec");
AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
AddCodeLine ("\tsta\t(ptr1),y");
}
break;
case CF_INT:
if (!FavourSize) {
/* Lots of code, use only if size is not important */
AddCodeLine ("\tsta\tptr1");
AddCodeLine ("\tstx\tptr1+1");
AddCodeLine ("\tldy\t#$%02X", offs);
AddCodeLine ("\tlda\t(ptr1),y");
AddCodeLine ("\tsec");
AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
AddCodeLine ("\tsta\t(ptr1),y");
AddCodeLine ("\tpha");
AddCodeLine ("\tiny");
AddCodeLine ("\tlda\t(ptr1),y");
AddCodeLine ("\tsbc\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tsta\t(ptr1),y");
AddCodeLine ("\ttax");
AddCodeLine ("\tpla");
break;
}
/* FALL THROUGH */
case CF_LONG:
AddCodeLine ("\tjsr\tpushax"); /* Push the address */
push (flags); /* Correct the internal sp */
g_getind (flags, offs); /* Fetch the value */
g_dec (flags, val); /* Increment value in primary */
g_putind (flags, offs); /* Store the value back */
break;
default:
typeerror (flags);
}
}
/*****************************************************************************/
/* Add a variable address to the value in ax */
/*****************************************************************************/
void g_addaddr_local (unsigned flags, int offs)
/* Add the address of a local variable to ax */
{
/* Add the offset */
offs -= oursp;
if (offs != 0) {
/* We cannot address more then 256 bytes of locals anyway */
CheckLocalOffs (offs);
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t#$%02X", offs & 0xFF);
AddCodeLine ("\tbcc\t*+4"); /* Do also skip the CLC insn below */
AddCodeLine ("\tinx");
AddCodeHint ("x:!"); /* Invalidate X */
}
/* Add the current stackpointer value */
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\tsp");
AddCodeLine ("\ttay");
AddCodeLine ("\ttxa");
AddCodeLine ("\tadc\tsp+1");
AddCodeLine ("\ttax");
AddCodeLine ("\ttya");
}
void g_addaddr_static (unsigned flags, unsigned long label, unsigned offs)
/* Add the address of a static variable to ax */
{
/* Create the correct label name */
char* lbuf = GetLabelName (flags, label, offs);
/* Add the address to the current ax value */
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t#<(%s)", lbuf);
AddCodeLine ("\ttay");
AddCodeLine ("\ttxa");
AddCodeLine ("\tadc\t#>(%s)", lbuf);
AddCodeLine ("\ttax");
AddCodeLine ("\ttya");
}
/*****************************************************************************/
/* */
/*****************************************************************************/
void g_save (unsigned flags)
/* Copy primary register to hold register. */
{
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tpha");
break;
}
/* FALLTHROUGH */
case CF_INT:
AddCodeLine ("\tsta\tregsave");
AddCodeLine ("\tstx\tregsave+1");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tsaveeax");
break;
default:
typeerror (flags);
}
}
void g_restore (unsigned flags)
/* Copy hold register to P. */
{
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tpla");
break;
}
/* FALLTHROUGH */
case CF_INT:
AddCodeLine ("\tlda\tregsave");
AddCodeLine ("\tldx\tregsave+1");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tresteax");
break;
default:
typeerror (flags);
}
}
void g_cmp (unsigned flags, unsigned long val)
/* Immidiate compare. The primary register will not be changed, Z flag
* will be set.
*/
{
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
break;
}
/* FALLTHROUGH */
case CF_INT:
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tbne\t*+4");
AddCodeLine ("\tcpx\t#$%02X", (val >> 8) & 0xFF);
break;
case CF_LONG:
Internal ("g_cmp: Long compares not implemented");
break;
default:
typeerror (flags);
}
}
static void oper (unsigned flags, unsigned long val, char** subs)
/* Encode a binary operation. subs is a pointer to four groups of three
* strings:
* 0-2 --> Operate on ints
* 3-5 --> Operate on unsigneds
* 6-8 --> Operate on longs
* 9-11 --> Operate on unsigned longs
*
* The first subroutine names in each string group is used to encode an
* operation with a zero constant, the second to encode an operation with
* a 8 bit constant, and the third is used in all other cases.
*/
{
unsigned offs;
/* Determine the offset into the array */
offs = (flags & CF_UNSIGNED)? 3 : 0;
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
break;
case CF_LONG:
offs += 6;
break;
default:
typeerror (flags);
}
/* Encode the operation */
if (flags & CF_CONST) {
/* Constant value given */
if (val == 0 && subs [offs+0]) {
/* Special case: constant with value zero */
AddCodeLine ("\tjsr\t%s", subs [offs+0]);
} else if (val < 0x100 && subs [offs+1]) {
/* Special case: constant with high byte zero */
ldaconst (val); /* Load low byte */
AddCodeLine ("\tjsr\t%s", subs [offs+1]);
} else {
/* Others: arbitrary constant value */
g_getimmed (flags, val, 0); /* Load value */
AddCodeLine ("\tjsr\t%s", subs [offs+2]);
}
} else {
/* Value not constant (is already in (e)ax) */
AddCodeLine ("\tjsr\t%s", subs [offs+2]);
}
/* The operation will pop it's argument */
pop (flags);
}
void g_test (unsigned flags)
/* Force a test to set cond codes right */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\ttax");
break;
}
/* FALLTHROUGH */
case CF_INT:
AddCodeLine ("\tstx\ttmp1");
AddCodeLine ("\tora\ttmp1");
break;
case CF_LONG:
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tutsteax");
} else {
AddCodeLine ("\tjsr\ttsteax");
}
break;
default:
typeerror (flags);
}
}
void g_push (unsigned flags, unsigned long val)
/* Push the primary register or a constant value onto the stack */
{
unsigned char hi;
if (flags & CF_CONST && (flags & CF_TYPE) != CF_LONG) {
/* We have a constant 8 or 16 bit value */
if ((flags & CF_TYPE) == CF_CHAR && (flags & CF_FORCECHAR)) {
/* Handle as 8 bit value */
if (FavourSize && val <= 2) {
AddCodeLine ("\tjsr\tpushc%d", (int) val);
} else {
ldaconst (val);
AddCodeLine ("\tjsr\tpusha");
}
} else {
/* Handle as 16 bit value */
hi = val >> 8;
if (val <= 7) {
AddCodeLine ("\tjsr\tpush%u", val);
} else if (hi == 0 || hi == 0xFF) {
/* Use special function */
ldaconst (val);
AddCodeLine ("\tjsr\t%s", (hi == 0)? "pusha0" : "pushaFF");
} else {
/* Long way ... */
g_getimmed (flags, val, 0);
AddCodeLine ("\tjsr\tpushax");
}
}
} else {
/* Value is not 16 bit or not constant */
if (flags & CF_CONST) {
/* Constant 32 bit value, load into eax */
g_getimmed (flags, val, 0);
}
/* Push the primary register */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
/* Handle as char */
AddCodeLine ("\tjsr\tpusha");
break;
}
/* FALL THROUGH */
case CF_INT:
AddCodeLine ("\tjsr\tpushax");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tpusheax");
break;
default:
typeerror (flags);
}
}
/* Adjust the stack offset */
push (flags);
}
void g_swap (unsigned flags)
/* Swap the primary register and the top of the stack. flags give the type
* of *both* values (must have same size).
*/
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
AddCodeLine ("\tjsr\tswapstk");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tswapestk");
break;
default:
typeerror (flags);
}
}
void g_call (unsigned flags, char* lbl, unsigned argsize)
/* Call the specified subroutine name */
{
if ((flags & CF_FIXARGC) == 0) {
/* Pass arg count */
ldyconst (argsize);
}
AddCodeLine ("\tjsr\t_%s", lbl);
oursp += argsize; /* callee pops args */
}
void g_callind (unsigned flags, unsigned argsize)
/* Call subroutine with address in AX */
{
if ((flags & CF_FIXARGC) == 0) {
/* Pass arg count */
ldyconst (argsize);
}
AddCodeLine ("\tjsr\tcallax"); /* do the call */
oursp += argsize; /* callee pops args */
}
void g_jump (unsigned label)
/* Jump to specified internal label number */
{
AddCodeLine ("\tjmp\tL%04X", label);
}
void g_switch (unsigned flags)
/* Output switch statement preample */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
AddCodeLine ("\tjsr\tswitch");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tlswitch");
break;
default:
typeerror (flags);
}
}
void g_case (unsigned flags, unsigned label, unsigned long val)
/* Create table code for one case selector */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
AddCodeLine ("\t.word\t$%04X, L%04X", val & 0xFFFF, label & 0xFFFF);
break;
case CF_LONG:
AddCodeLine ("\t.dword\t$%08X", val);
AddCodeLine ("\t.word\tL%04X", label & 0xFFFF);
break;
default:
typeerror (flags);
}
}
void g_truejump (unsigned flags, unsigned label)
/* Jump to label if zero flag clear */
{
if (flags & CF_SHORT) {
AddCodeLine ("\tbne\tL%04X", label);
} else {
AddCodeLine ("\tjne\tL%04X", label);
}
}
void g_falsejump (unsigned flags, unsigned label)
/* Jump to label if zero flag set */
{
if (flags & CF_SHORT) {
AddCodeLine ("\tbeq\tL%04X", label);
} else {
AddCodeLine ("\tjeq\tL%04X", label);
}
}
static void mod_internal (int k, char* verb1, char* verb2)
{
if (k <= 8) {
AddCodeLine ("\tjsr\t%ssp%c", verb1, k + '0');
} else {
CheckLocalOffs (k);
ldyconst (k);
AddCodeLine ("\tjsr\t%ssp", verb2);
}
}
void g_space (int space)
/* Create or drop space on the stack */
{
if (space < 0) {
mod_internal (-space, "inc", "addy");
} else if (space > 0) {
mod_internal (space, "dec", "suby");
}
}
void g_add (unsigned flags, unsigned long val)
/* Primary = TOS + Primary */
{
static char* ops [12] = {
0, "tosadda0", "tosaddax",
0, "tosadda0", "tosaddax",
0, 0, "tosaddeax",
0, 0, "tosaddeax",
};
if (flags & CF_CONST) {
flags &= ~CF_FORCECHAR; // Handle chars as ints
g_push (flags & ~CF_CONST, 0);
}
oper (flags, val, ops);
}
void g_sub (unsigned flags, unsigned long val)
/* Primary = TOS - Primary */
{
static char* ops [12] = {
0, "tossuba0", "tossubax",
0, "tossuba0", "tossubax",
0, 0, "tossubeax",
0, 0, "tossubeax",
};
if (flags & CF_CONST) {
flags &= ~CF_FORCECHAR; // Handle chars as ints
g_push (flags & ~CF_CONST, 0);
}
oper (flags, val, ops);
}
void g_rsub (unsigned flags, unsigned long val)
/* Primary = Primary - TOS */
{
static char* ops [12] = {
0, "tosrsuba0", "tosrsubax",
0, "tosrsuba0", "tosrsubax",
0, 0, "tosrsubeax",
0, 0, "tosrsubeax",
};
oper (flags, val, ops);
}
void g_mul (unsigned flags, unsigned long val)
/* Primary = TOS * Primary */
{
static char* ops [12] = {
0, "tosmula0", "tosmulax",
0, "tosumula0", "tosumulax",
0, 0, "tosmuleax",
0, 0, "tosumuleax",
};
int p2;
/* Do strength reduction if the value is constant and a power of two */
if (flags & CF_CONST && (p2 = powerof2 (val)) >= 0) {
/* Generate a shift instead */
g_asl (flags, p2);
return;
}
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
/* Handle some special cases */
switch (val) {
case 3:
AddCodeLine ("\tsta\ttmp1");
AddCodeLine ("\tasl\ta");
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\ttmp1");
return;
case 5:
AddCodeLine ("\tsta\ttmp1");
AddCodeLine ("\tasl\ta");
AddCodeLine ("\tasl\ta");
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\ttmp1");
return;
case 10:
AddCodeLine ("\tsta\ttmp1");
AddCodeLine ("\tasl\ta");
AddCodeLine ("\tasl\ta");
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\ttmp1");
AddCodeLine ("\tasl\ta");
return;
}
}
/* FALLTHROUGH */
case CF_INT:
break;
case CF_LONG:
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
flags &= ~CF_FORCECHAR; // Handle chars as ints
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_div (unsigned flags, unsigned long val)
/* Primary = TOS / Primary */
{
static char* ops [12] = {
0, "tosdiva0", "tosdivax",
0, "tosudiva0", "tosudivax",
0, 0, "tosdiveax",
0, 0, "tosudiveax",
};
/* Do strength reduction if the value is constant and a power of two */
int p2;
if ((flags & CF_CONST) && (p2 = powerof2 (val)) >= 0) {
/* Generate a shift instead */
g_asr (flags, p2);
} else {
/* Generate a division */
if (flags & CF_CONST) {
/* lhs is not on stack */
flags &= ~CF_FORCECHAR; // Handle chars as ints
g_push (flags & ~CF_CONST, 0);
}
oper (flags, val, ops);
}
}
void g_mod (unsigned flags, unsigned long val)
/* Primary = TOS % Primary */
{
static char* ops [12] = {
0, "tosmoda0", "tosmodax",
0, "tosumoda0", "tosumodax",
0, 0, "tosmodeax",
0, 0, "tosumodeax",
};
int p2;
/* Check if we can do some cost reduction */
if ((flags & CF_CONST) && (flags & CF_UNSIGNED) && val != 0xFFFFFFFF && (p2 = powerof2 (val)) >= 0) {
/* We can do that with an AND operation */
g_and (flags, val - 1);
} else {
/* Do it the hard way... */
if (flags & CF_CONST) {
/* lhs is not on stack */
flags &= ~CF_FORCECHAR; // Handle chars as ints
g_push (flags & ~CF_CONST, 0);
}
oper (flags, val, ops);
}
}
void g_or (unsigned flags, unsigned long val)
/* Primary = TOS | Primary */
{
static char* ops [12] = {
0, "tosora0", "tosorax",
0, "tosora0", "tosorax",
0, 0, "tosoreax",
0, 0, "tosoreax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
if ((val & 0xFF) != 0xFF) {
AddCodeLine ("\tora\t#$%02X", val & 0xFF);
}
return;
}
/* FALLTHROUGH */
case CF_INT:
if (val <= 0xFF) {
AddCodeLine ("\tora\t#$%02X", val & 0xFF);
return;
}
break;
case CF_LONG:
if (val <= 0xFF) {
AddCodeLine ("\tora\t#$%02X", val & 0xFF);
return;
}
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_xor (unsigned flags, unsigned long val)
/* Primary = TOS ^ Primary */
{
static char* ops [12] = {
0, "tosxora0", "tosxorax",
0, "tosxora0", "tosxorax",
0, 0, "tosxoreax",
0, 0, "tosxoreax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
if ((val & 0xFF) != 0) {
AddCodeLine ("\teor\t#$%02X", val & 0xFF);
}
return;
}
/* FALLTHROUGH */
case CF_INT:
if (val <= 0xFF) {
if (val != 0) {
AddCodeLine ("\teor\t#$%02X", val);
}
return;
} else if ((val & 0xFF) == 0) {
AddCodeLine ("\tpha");
AddCodeLine ("\ttxa");
AddCodeLine ("\teor\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\ttax");
AddCodeLine ("\tpla");
return;
}
break;
case CF_LONG:
if (val <= 0xFF) {
if (val != 0) {
AddCodeLine ("\teor\t#$%02X", val & 0xFF);
}
return;
}
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_and (unsigned flags, unsigned long val)
/* Primary = TOS & Primary */
{
static char* ops [12] = {
0, "tosanda0", "tosandax",
0, "tosanda0", "tosandax",
0, 0, "tosandeax",
0, 0, "tosandeax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tand\t#$%02X", val & 0xFF);
return;
}
/* FALLTHROUGH */
case CF_INT:
if ((val & 0xFFFF) != 0xFFFF) {
if (val <= 0xFF) {
ldxconst (0);
if (val == 0) {
ldaconst (0);
} else if (val != 0xFF) {
AddCodeLine ("\tand\t#$%02X", val & 0xFF);
}
} else if ((val & 0xFF00) == 0xFF00) {
AddCodeLine ("\tand\t#$%02X", val & 0xFF);
} else if ((val & 0x00FF) == 0x0000) {
AddCodeLine ("\ttxa");
AddCodeLine ("\tand\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\ttax");
ldaconst (0);
} else {
AddCodeLine ("\ttay");
AddCodeLine ("\ttxa");
AddCodeLine ("\tand\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\ttax");
AddCodeLine ("\ttya");
if ((val & 0x00FF) != 0x00FF) {
AddCodeLine ("\tand\t#$%02X", val & 0xFF);
}
}
}
return;
case CF_LONG:
if (val <= 0xFF) {
ldxconst (0);
AddCodeLine ("\tstx\tsreg+1");
AddCodeLine ("\tstx\tsreg");
if ((val & 0xFF) != 0xFF) {
AddCodeLine ("\tand\t#$%02X", val & 0xFF);
}
return;
} else if (val == 0xFF00) {
ldaconst (0);
AddCodeLine ("\tsta\tsreg+1");
AddCodeLine ("\tsta\tsreg");
return;
}
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_asr (unsigned flags, unsigned long val)
/* Primary = TOS >> Primary */
{
static char* ops [12] = {
0, "tosasra0", "tosasrax",
0, "tosshra0", "tosshrax",
0, 0, "tosasreax",
0, 0, "tosshreax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
if (val >= 1 && val <= 3) {
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tshrax%ld", val);
} else {
AddCodeLine ("\tjsr\tasrax%ld", val);
}
return;
} else if (val == 8 && (flags & CF_UNSIGNED)) {
AddCodeLine ("\ttxa");
ldxconst (0);
return;
}
break;
case CF_LONG:
if (val >= 1 && val <= 3) {
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tshreax%ld", val);
} else {
AddCodeLine ("\tjsr\tasreax%ld", val);
}
return;
} else if (val == 8 && (flags & CF_UNSIGNED)) {
AddCodeLine ("\ttxa");
AddCodeLine ("\tldx\tsreg");
AddCodeLine ("\tldy\tsreg+1");
AddCodeLine ("\tsty\tsreg");
AddCodeLine ("\tldy\t#$00");
AddCodeLine ("\tsty\tsreg+1");
return;
} else if (val == 16) {
AddCodeLine ("\tldy\t#$00");
AddCodeLine ("\tldx\tsreg+1");
if ((flags & CF_UNSIGNED) == 0) {
AddCodeLine ("\tbpl\t*+3");
AddCodeLine ("\tdey");
AddCodeHint ("y:!");
}
AddCodeLine ("\tlda\tsreg");
AddCodeLine ("\tsty\tsreg+1");
AddCodeLine ("\tsty\tsreg");
return;
}
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_asl (unsigned flags, unsigned long val)
/* Primary = TOS << Primary */
{
static char* ops [12] = {
0, "tosasla0", "tosaslax",
0, "tosshla0", "tosshlax",
0, 0, "tosasleax",
0, 0, "tosshleax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
if (val >= 1 && val <= 3) {
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tshlax%ld", val);
} else {
AddCodeLine ("\tjsr\taslax%ld", val);
}
return;
} else if (val == 8) {
AddCodeLine ("\ttax");
AddCodeLine ("\tlda\t#$00");
return;
}
break;
case CF_LONG:
if (val >= 1 && val <= 3) {
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tshleax%ld", val);
} else {
AddCodeLine ("\tjsr\tasleax%ld", val);
}
return;
} else if (val == 8) {
AddCodeLine ("\tldy\tsreg");
AddCodeLine ("\tsty\tsreg+1");
AddCodeLine ("\tstx\tsreg");
AddCodeLine ("\ttax");
AddCodeLine ("\tlda\t#$00");
return;
} else if (val == 16) {
AddCodeLine ("\tstx\tsreg+1");
AddCodeLine ("\tsta\tsreg");
AddCodeLine ("\tlda\t#$00");
AddCodeLine ("\ttax");
return;
}
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_neg (unsigned flags)
/* Primary = -Primary */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
AddCodeLine ("\tjsr\tnegax");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tnegeax");
break;
default:
typeerror (flags);
}
}
void g_bneg (unsigned flags)
/* Primary = !Primary */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
AddCodeLine ("\tjsr\tbnega");
break;
case CF_INT:
AddCodeLine ("\tjsr\tbnegax");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tbnegeax");
break;
default:
typeerror (flags);
}
}
void g_com (unsigned flags)
/* Primary = ~Primary */
{
switch (flags & CF_TYPE) {
case CF_CHAR:
case CF_INT:
AddCodeLine ("\tjsr\tcomplax");
break;
case CF_LONG:
AddCodeLine ("\tjsr\tcompleax");
break;
default:
typeerror (flags);
}
}
void g_inc (unsigned flags, unsigned long val)
/* Increment the primary register by a given number */
{
/* Don't inc by zero */
if (val == 0) {
return;
}
/* Generate code for the supported types */
flags &= ~CF_CONST;
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t#$%02X", val & 0xFF);
break;
}
/* FALLTHROUGH */
case CF_INT:
if (FavourSize) {
/* Use jsr calls */
if (val <= 8) {
AddCodeLine ("\tjsr\tincax%u", val);
} else if (val <= 255) {
ldyconst (val);
AddCodeLine ("\tjsr\tincaxy");
} else {
g_add (flags | CF_CONST, val);
}
} else {
/* Inline the code */
if (val < 0x300) {
if ((val & 0xFF) != 0) {
AddCodeLine ("\tclc");
AddCodeLine ("\tadc\t#$%02X", (unsigned char) val);
AddCodeLine ("\tbcc\t*+3");
AddCodeLine ("\tinx");
/* Tell the optimizer that the X register may be invalid */
AddCodeHint ("x:!");
}
if (val >= 0x100) {
AddCodeLine ("\tinx");
}
if (val >= 0x200) {
AddCodeLine ("\tinx");
}
} else {
AddCodeLine ("\tclc");
if ((val & 0xFF) != 0) {
AddCodeLine ("\tadc\t#$%02X", (unsigned char) val);
/* Tell the optimizer that the X register may be invalid */
AddCodeHint ("x:!");
}
AddCodeLine ("\tpha");
AddCodeLine ("\ttxa");
AddCodeLine ("\tadc\t#$%02X", (unsigned char) (val >> 8));
AddCodeLine ("\ttax");
AddCodeLine ("\tpla");
}
}
break;
case CF_LONG:
if (val <= 255) {
ldyconst (val);
AddCodeLine ("\tjsr\tinceaxy");
} else {
g_add (flags | CF_CONST, val);
}
break;
default:
typeerror (flags);
}
}
void g_dec (unsigned flags, unsigned long val)
/* Decrement the primary register by a given number */
{
/* Generate code for the supported types */
flags &= ~CF_CONST;
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tsec");
AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
break;
}
/* FALLTHROUGH */
case CF_INT:
if (val <= 2) {
AddCodeLine ("\tjsr\tdecax%d", (int) val);
} else if (val <= 255) {
ldyconst (val);
AddCodeLine ("\tjsr\tdecaxy");
} else {
g_sub (flags | CF_CONST, val);
}
break;
case CF_LONG:
if (val <= 255) {
ldyconst (val);
AddCodeLine ("\tjsr\tdeceaxy");
} else {
g_sub (flags | CF_CONST, val);
}
break;
default:
typeerror (flags);
}
}
/*
* Following are the conditional operators. They compare the TOS against
* the primary and put a literal 1 in the primary if the condition is
* true, otherwise they clear the primary register
*/
void g_eq (unsigned flags, unsigned long val)
/* Test for equal */
{
static char* ops [12] = {
"toseq00", "toseqa0", "toseqax",
"toseq00", "toseqa0", "toseqax",
0, 0, "toseqeax",
0, 0, "toseqeax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tbooleq");
return;
}
/* FALLTHROUGH */
case CF_INT:
AddCodeLine ("\tcpx\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tbne\t*+4");
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tbooleq");
return;
case CF_LONG:
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_ne (unsigned flags, unsigned long val)
/* Test for not equal */
{
static char* ops [12] = {
"tosne00", "tosnea0", "tosneax",
"tosne00", "tosnea0", "tosneax",
0, 0, "tosneeax",
0, 0, "tosneeax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tboolne");
return;
}
/* FALLTHROUGH */
case CF_INT:
AddCodeLine ("\tcpx\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tbne\t*+4");
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tboolne");
return;
case CF_LONG:
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_lt (unsigned flags, unsigned long val)
/* Test for less than */
{
static char* ops [12] = {
"toslt00", "toslta0", "tosltax",
"tosult00", "tosulta0", "tosultax",
0, 0, "toslteax",
0, 0, "tosulteax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
/* Give a warning in some special cases */
if ((flags & CF_UNSIGNED) && val == 0) {
Warning (WARN_COND_NEVER_TRUE);
}
/* Look at the type */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tboolult");
} else {
AddCodeLine ("\tjsr\tboollt");
}
return;
}
/* FALLTHROUGH */
case CF_INT:
if ((flags & CF_UNSIGNED) == 0 && val == 0) {
/* If we have a signed compare against zero, we only need to
* test the high byte.
*/
AddCodeLine ("\ttxa");
AddCodeLine ("\tjsr\tboollt");
return;
}
/* Direct code only for unsigned data types */
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tcpx\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tbne\t*+4");
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tboolult");
return;
}
break;
case CF_LONG:
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_le (unsigned flags, unsigned long val)
/* Test for less than or equal to */
{
static char* ops [12] = {
"tosle00", "toslea0", "tosleax",
"tosule00", "tosulea0", "tosuleax",
0, 0, "tosleeax",
0, 0, "tosuleeax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
/* Look at the type */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tboolule");
} else {
AddCodeLine ("\tjsr\tboolle");
}
return;
}
/* FALLTHROUGH */
case CF_INT:
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tcpx\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tbne\t*+4");
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tboolule");
return;
}
break;
case CF_LONG:
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_gt (unsigned flags, unsigned long val)
/* Test for greater than */
{
static char* ops [12] = {
"tosgt00", "tosgta0", "tosgtax",
"tosugt00", "tosugta0", "tosugtax",
0, 0, "tosgteax",
0, 0, "tosugteax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
/* Look at the type */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
if (flags & CF_UNSIGNED) {
/* If we have a compare > 0, we will replace it by
* != 0 here, since both are identical but the latter
* is easier to optimize.
*/
if (val & 0xFF) {
AddCodeLine ("\tjsr\tboolugt");
} else {
AddCodeLine ("\tjsr\tboolne");
}
} else {
AddCodeLine ("\tjsr\tboolgt");
}
return;
}
/* FALLTHROUGH */
case CF_INT:
if (flags & CF_UNSIGNED) {
/* If we have a compare > 0, we will replace it by
* != 0 here, since both are identical but the latter
* is easier to optimize.
*/
if ((val & 0xFFFF) == 0) {
AddCodeLine ("\tstx\ttmp1");
AddCodeLine ("\tora\ttmp1");
AddCodeLine ("\tjsr\tboolne");
} else {
AddCodeLine ("\tcpx\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tbne\t*+4");
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tboolugt");
}
return;
}
break;
case CF_LONG:
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
void g_ge (unsigned flags, unsigned long val)
/* Test for greater than or equal to */
{
static char* ops [12] = {
"tosge00", "tosgea0", "tosgeax",
"tosuge00", "tosugea0", "tosugeax",
0, 0, "tosgeeax",
0, 0, "tosugeeax",
};
/* If the right hand side is const, the lhs is not on stack but still
* in the primary register.
*/
if (flags & CF_CONST) {
/* Give a warning in some special cases */
if ((flags & CF_UNSIGNED) && val == 0) {
Warning (WARN_COND_ALWAYS_TRUE);
}
/* Look at the type */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tjsr\tbooluge");
} else {
AddCodeLine ("\tjsr\tboolge");
}
return;
}
/* FALLTHROUGH */
case CF_INT:
if (flags & CF_UNSIGNED) {
AddCodeLine ("\tcpx\t#$%02X", (val >> 8) & 0xFF);
AddCodeLine ("\tbne\t*+4");
AddCodeLine ("\tcmp\t#$%02X", val & 0xFF);
AddCodeLine ("\tjsr\tbooluge");
return;
}
break;
case CF_LONG:
break;
default:
typeerror (flags);
}
/* If we go here, we didn't emit code. Push the lhs on stack and fall
* into the normal, non-optimized stuff.
*/
g_push (flags & ~CF_CONST, 0);
}
/* Use long way over the stack */
oper (flags, val, ops);
}
/*****************************************************************************/
/* Allocating static storage */
/*****************************************************************************/
void g_res (unsigned n)
/* reserve static storage, n bytes */
{
AddCodeLine ("\t.res\t%u", n);
}
void g_defdata (unsigned flags, unsigned long val, unsigned offs)
/* Define data with the size given in flags */
{
if (flags & CF_CONST) {
/* Numeric constant */
switch (flags & CF_TYPE) {
case CF_CHAR:
AddCodeLine ("\t.byte\t$%02lX", val & 0xFF);
break;
case CF_INT:
AddCodeLine ("\t.word\t$%04lX", val & 0xFFFF);
break;
case CF_LONG:
AddCodeLine ("\t.dword\t$%08lX", val & 0xFFFFFFFF);
break;
default:
typeerror (flags);
break;
}
} else {
/* Create the correct label name */
const char* Label = GetLabelName (flags, val, offs);
/* Labels are always 16 bit */
AddCodeLine ("\t.word\t%s", Label);
}
}
void g_defbytes (const unsigned char* Bytes, unsigned Count)
/* output a row of bytes as a constant */
{
unsigned Chunk;
char Buf [128];
char* B;
/* Output the stuff */
while (Count) {
/* How many go into this line? */
if ((Chunk = Count) > 16) {
Chunk = 16;
}
Count -= Chunk;
/* Output one line */
strcpy (Buf, "\t.byte\t");
B = Buf + 7;
do {
B += sprintf (B, "$%02X", *Bytes++ & 0xFF);
if (--Chunk) {
*B++ = ',';
}
} while (Chunk);
/* Output the line */
AddCodeLine (Buf);
}
}
void g_zerobytes (unsigned n)
/* Output n bytes of data initialized with zero */
{
AddCodeLine ("\t.res\t%u", n);
}
/*****************************************************************************/
/* Inlined known functions */
/*****************************************************************************/
void g_strlen (unsigned flags, unsigned long val, unsigned offs)
/* Inline the strlen() function */
{
/* We need a label in both cases */
unsigned label = GetLabel ();
/* Two different encodings */
if (flags & CF_CONST) {
/* The address of the string is constant. Create the correct label name */
char* lbuf = GetLabelName (flags, val, offs);
/* Generate the strlen code */
AddCodeLine ("\tldy\t#$FF");
g_defloclabel (label);
AddCodeLine ("\tiny");
AddCodeLine ("\tlda\t%s,y", lbuf);
AddCodeLine ("\tbne\tL%04X", label);
AddCodeLine ("\ttya");
AddCodeLine ("\tldx\t#$00");
} else {
/* Address not constant but in primary */
if (FavourSize) {
/* This is too much code, so call strlen instead of inlining */
AddCodeLine ("\tjsr\t_strlen");
} else {
/* Inline the function */
AddCodeLine ("\tsta\tptr1");
AddCodeLine ("\tstx\tptr1+1");
AddCodeLine ("\tldy\t#$FF");
g_defloclabel (label);
AddCodeLine ("\tiny");
AddCodeLine ("\tlda\t(ptr1),y");
AddCodeLine ("\tbne\tL%04X", label);
AddCodeLine ("\ttya");
AddCodeLine ("\tldx\t#$00");
}
}
}
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