lifning
/
gpsp
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix ARM dynarec unaligned 32 bit loads 

This might make a handful games slightly slower (but on the upper side
they work now instead of crashing or restarting).
Also while at it, fix some minor stuff in arm stubs for speed.
This commit is contained in:
David Guillen Fandos 2021-05-15 21:43:10 +02:00 committed by David G. F
parent cc1a074621
commit 2877886ff1
1 changed files with 9 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
arm/arm_stub.S
View File

@ -67,14 +67,8 @@ _##symbol:
#define MODE_SUPERVISOR 3
#ifdef __ARM_ARCH_7A__
#define extract_u16(rd, rs) \
uxth rd, rs
#else
#define extract_u16(rd, rs) \
bic rd, rs, #0xff000000 ;\
bic rd, rd, #0x00ff0000
#endif
#define extract_u16(rd, rs) \
uxth rd, rs
@ Will load the register set from memory into the appropriate cached registers.
@ See arm_emit.h for listing explanation.
@ -777,12 +771,10 @@ lookup_pc:
#define sign_extend_u32(reg)
#define sign_extend_s8(reg) ;\
mov reg, reg, lsl #24 /* shift reg into upper 8bits */;\
mov reg, reg, asr #24 /* shift down, sign extending */;\
sxtb reg, reg
#define sign_extend_s16(reg) ;\
mov reg, reg, lsl #16 /* shift reg into upper 16bits */;\
mov reg, reg, asr #16 /* shift down, sign extending */;\
sxth reg, reg
#define execute_load_op_u8(load_op) ;\
mov r0, r0, lsl #17 ;\
@ -836,11 +828,11 @@ ext_load_##load_type: ;\
.pool
execute_load_builder(u8, 8, ldrneb, #0xF0000000)
execute_load_builder(s8, 8, ldrnesb, #0xF0000000)
execute_load_builder(u16, 16, ldrneh, #0xF0000001)
execute_load_builder(s16, 16_signed, ldrnesh, #0xF0000001)
execute_load_builder(u32, 32, ldrne, #0xF0000000)
execute_load_builder(u8, 8, ldrb, #0xF0000000)
execute_load_builder(s8, 8, ldrsb, #0xF0000000)
execute_load_builder(u16, 16, ldrh, #0xF0000001)
execute_load_builder(s16, 16_signed, ldrsh, #0xF0000001)
execute_load_builder(u32, 32, ldr, #0xF0000003)
.data