Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Force implicit dependency on previous register version when accessing a partial register. Fixes graphics issues in Windows 95 on Packard Bell PB410A using built-in HT216 video.

Browse source
This commit is contained in:
SarahW 2019-04-28 10:04:30 +01:00
commit 16a86adbf8
2 changed files with 7 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/codegen_reg.c
View file

@ -191,7 +191,7 @@ void codegen_reg_mark_as_required()
}
}
static int reg_is_native_size(ir_reg_t ir_reg)
int reg_is_native_size(ir_reg_t ir_reg)
{
int native_size = ireg_data[IREG_GET_REG(ir_reg.reg)].native_size;
int requested_size = IREG_GET_SIZE(ir_reg.reg);

7
src/codegen_reg.h
View file

@ -343,6 +343,8 @@ static inline ir_reg_t codegen_reg_read(int reg)
return ireg;
}
int reg_is_native_size(ir_reg_t ir_reg);
static inline ir_reg_t codegen_reg_write(int reg, int uop_nr)
{
ir_reg_t ireg;
@ -357,7 +359,10 @@ static inline ir_reg_t codegen_reg_write(int reg, int uop_nr)
if (IREG_GET_REG(reg) > IREG_EBX && last_version && !reg_version[IREG_GET_REG(reg)][last_version].refcount &&
!(reg_version[IREG_GET_REG(reg)][last_version].flags & REG_FLAGS_REQUIRED))
add_to_dead_list(&reg_version[IREG_GET_REG(reg)][last_version], IREG_GET_REG(reg), last_version);
{
if (reg_is_native_size(ireg)) /*Non-native size registers have an implicit dependency on the previous version, so don't add to dead list*/
add_to_dead_list(&reg_version[IREG_GET_REG(reg)][last_version], IREG_GET_REG(reg), last_version);
}
reg_last_version[IREG_GET_REG(reg)]++;
if (!reg_last_version[IREG_GET_REG(reg)])