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

Added MMX emulation (probably some bugs). Implemented RDMSR/WRMSR for Winchip.

Browse source
This commit is contained in:
TomW 2013-08-03 15:05:50 +01:00
commit 119fe36820
17 changed files with 2362 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

49
src/x86_ops_mmx.h Normal file
View file

@ -0,0 +1,49 @@
#define SSATB(val) (((val) < -128) ? -128 : (((val) > 127) ? 127 : (val)))
#define SSATW(val) (((val) < -32768) ? -32768 : (((val) > 32767) ? 32767 : (val)))
#define USATB(val) (((val) < 0) ? 0 : (((val) > 255) ? 255 : (val)))
#define USATW(val) (((val) < 0) ? 0 : (((val) > 65535) ? 65535 : (val)))
#define MMX_GETSRC() \
if (mod == 3) \
{ \
src = MM[rm]; \
cycles--; \
} \
else \
{ \
src.l[0] = readmeml(easeg, eaaddr); \
src.l[1] = readmeml(easeg, eaaddr + 4); if (abrt) return 0; \
cycles -= 2; \
}
#define MMX_ENTER() \
if (!cpu_hasMMX) \
{ \
pc = oldpc; \
x86illegal(); \
return 0; \
} \
if (cr0 & 0xc) \
{ \
x86_int(7); \
return 0; \
} \
x87_set_mmx()
int opEMMS(uint32_t fetchdat)
{
if (!cpu_hasMMX)
{
pc = oldpc;
x86illegal();
return 0;
}
if (cr0 & 4)
{
x86_int(7);
return 0;
}
x87_emms();
cycles -= 100; /*Guess*/
return 0;
}