mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-11 03:52:59 +00:00
134 lines
3.3 KiB
ArmAsm
134 lines
3.3 KiB
ArmAsm
.text
|
|
.macro do_call fn
|
|
#ifdef _TMS320C6400_PLUS
|
|
callp .s2 (\fn), B3
|
|
#elif defined(_TMS320C6400)
|
|
call .s2 (\fn)
|
|
addkpc .s2 9f, B3, 0
|
|
nop 4
|
|
9f:
|
|
#else
|
|
call .s2 (\fn)
|
|
mhkl .s2 9f, B3
|
|
mhkh .s2 9f, B3
|
|
nop 3
|
|
9f:
|
|
#endif
|
|
.endm
|
|
.align 2
|
|
.global restore_core_regs
|
|
.type restore_core_regs, STT_FUNC
|
|
restore_core_regs:
|
|
mv .s2x A4, B4
|
|
ldw .d1t1 *+A4[0], A0
|
|
|| ldw .d2t2 *++B4[16], B0
|
|
ldw .d1t1 *+A4[1], A1
|
|
|| ldw .d2t2 *+B4[1], B1
|
|
ldw .d1t1 *+A4[2], A2
|
|
|| ldw .d2t2 *+B4[2], B2
|
|
ldw .d1t1 *+A4[3], A3
|
|
|| ldw .d2t2 *+B4[3], B3
|
|
;; Base registers are loaded later
|
|
ldw .d1t1 *+A4[5], A5
|
|
|| ldw .d2t2 *+B4[5], B5
|
|
ldw .d1t1 *+A4[6], A6
|
|
|| ldw .d2t2 *+B4[6], B6
|
|
ldw .d1t1 *+A4[7], A7
|
|
|| ldw .d2t2 *+B4[7], B7
|
|
ldw .d1t1 *+A4[8], A8
|
|
|| ldw .d2t2 *+B4[8], B8
|
|
ldw .d1t1 *+A4[9], A9
|
|
|| ldw .d2t2 *+B4[9], B9
|
|
;; load PC into B10 so that it is ready for the branch
|
|
ldw .d2t2 *+B4[16], B10
|
|
ldw .d1t1 *+A4[11], A11
|
|
|| ldw .d2t2 *+B4[11], B11
|
|
ldw .d1t1 *+A4[12], A12
|
|
|| ldw .d2t2 *+B4[12], B12
|
|
ldw .d1t1 *+A4[13], A13
|
|
|| ldw .d2t2 *+B4[13], B13
|
|
ldw .d1t1 *+A4[14], A14
|
|
|| ldw .d2t2 *+B4[14], B14
|
|
;; Loads have 4 delay slots. Take advantage of this to restore the
|
|
;; scratch registers and stack pointer before the base registers
|
|
;; disappear. We also need to make sure no interrupts occur,
|
|
;; so put the whole thing in the delay slots of a dummy branch
|
|
;; We cannot move the ret earlier as that would cause it to occur
|
|
;; before the last load completes
|
|
b .s1 (1f)
|
|
ldw .d1t1 *+A4[4], A4
|
|
|| ldw .d2t2 *+B4[4], B4
|
|
ldw .d1t1 *+A4[15], A15
|
|
|| ldw .d2t2 *+B4[15], B15
|
|
ret .s2 B10
|
|
ldw .d1t1 *+A4[10], A10
|
|
|| ldw .d2t2 *+B4[10], B10
|
|
nop 1
|
|
1:
|
|
nop 3
|
|
.size restore_core_regs, . - restore_core_regs
|
|
|
|
.macro UNWIND_WRAPPER name argreg argside
|
|
.global \name
|
|
.type \name, STT_FUNC
|
|
\name:
|
|
# Create saved register state: flags,A0-A15,B0-B15,PC = 136 bytes.
|
|
# Plus 4 (rounded to 8) for saving return.
|
|
addk .s2 -144, B15
|
|
stw .d2t1 A0, *+B15[2]
|
|
stw .d2t1 A1, *+B15[3]
|
|
stw .d2t1 A2, *+B15[4]
|
|
stw .d2t1 A3, *+B15[5]
|
|
stw .d2t1 A4, *+B15[6]
|
|
stw .d2t1 A5, *+B15[7]
|
|
stw .d2t1 A6, *+B15[8]
|
|
stw .d2t1 A7, *+B15[9]
|
|
stw .d2t1 A8, *+B15[10]
|
|
stw .d2t1 A9, *+B15[11]
|
|
stw .d2t1 A10, *+B15[12]
|
|
stw .d2t1 A11, *+B15[13]
|
|
stw .d2t1 A12, *+B15[14]
|
|
stw .d2t1 A13, *+B15[15]
|
|
stw .d2t1 A14, *+B15[16]
|
|
stw .d2t1 A15, *+B15[17]
|
|
mv .s1x B15, A0
|
|
addk .s1 144, A0
|
|
stw .d2t2 B0, *+B15[18]
|
|
stw .d2t2 B1, *+B15[19]
|
|
stw .d2t2 B2, *+B15[20]
|
|
stw .d2t2 B3, *+B15[21]
|
|
stw .d2t2 B4, *+B15[22]
|
|
stw .d2t2 B5, *+B15[23]
|
|
stw .d2t2 B6, *+B15[24]
|
|
stw .d2t2 B7, *+B15[25]
|
|
stw .d2t2 B8, *+B15[26]
|
|
stw .d2t2 B9, *+B15[27]
|
|
stw .d2t2 B10, *+B15[28]
|
|
stw .d2t2 B11, *+B15[29]
|
|
stw .d2t2 B12, *+B15[30]
|
|
stw .d2t2 B13, *+B15[31]
|
|
stw .d2t2 B14, *+B15[32]
|
|
stw .d2t1 A0, *+B15[33]
|
|
stw .d2t1 A0, *+B15[34]
|
|
# Zero demand saved flags
|
|
mvk .s1 0, A0
|
|
stw .d2t1 A0, *+B15[1]
|
|
# Save return address, setup additional argument and call function
|
|
stw .d2t2 B3, *+B15[35]
|
|
add .d\argside B15, 4, \argreg
|
|
do_call __gnu\name
|
|
# Restore stack and return
|
|
ldw .d2t2 *+B15[35], B3
|
|
addk .s2 144, B15
|
|
nop 3
|
|
ret .s2 B3
|
|
nop 5
|
|
.size \name, . - \name
|
|
.endm
|
|
|
|
UNWIND_WRAPPER _Unwind_RaiseException B4 2
|
|
UNWIND_WRAPPER _Unwind_Resume B4 2
|
|
UNWIND_WRAPPER _Unwind_Resume_or_Rethrow B4 2
|
|
UNWIND_WRAPPER _Unwind_ForcedUnwind B6 2
|
|
UNWIND_WRAPPER _Unwind_Backtrace A6 1x
|