ShuriZma
/
flycast
mirror of https://github.com/flyinghead/flycast.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

sh4: Cleanup SetFloatStatusReg a bit

This commit is contained in:
Stefanos Kornilios Mitsis Poiitidis 2015-08-08 17:04:10 +02:00 committed by TwistedUmbrella
parent cda7036ef1
commit c60fca4973
1 changed files with 19 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
core/hw/sh4/sh4_core_regs.cpp
View File

@ -72,32 +72,31 @@ void SetFloatStatusReg()
{ {
old_rm=fpscr.RM ; old_rm=fpscr.RM ;
old_dn=fpscr.DN ; old_dn=fpscr.DN ;
u32 temp=0x1f80; //no flush to zero && round to nearest
//Correct rounding is required by some games (SOTB, etc)
#if BUILD_COMPILER == COMPILER_VC
if (fpscr.RM == 1) //if round to 0 , set the flag
_controlfp(_RC_CHOP, _MCW_RC);
else
_controlfp(_RC_NEAR, _MCW_RC);
if (fpscr.DN) //denormals are considered 0
_controlfp(_DN_FLUSH, _MCW_DN);
else
_controlfp(_DN_SAVE, _MCW_DN);
#else
#if HOST_CPU==CPU_X86 || HOST_CPU==CPU_X64
//TODO: Implement this (needed for SOTB) u32 temp=0x1f80; //no flush to zero && round to nearest
#if HOST_CPU==CPU_X86
#if BUILD_COMPILER == COMPILER_VC
if (fpscr.RM == 1) //if round to 0 , set the flag
_controlfp(_RC_CHOP, _MCW_RC);
else
_controlfp(_RC_NEAR, _MCW_RC);
if (fpscr.DN) //denormals are considered 0
_controlfp(_DN_FLUSH, _MCW_DN);
else
_controlfp(_DN_SAVE, _MCW_DN);
#else
if (fpscr.RM==1) //if round to 0 , set the flag if (fpscr.RM==1) //if round to 0 , set the flag
temp|=(3<<13); temp|=(3<<13);
if (fpscr.DN) //denormals are considered 0 if (fpscr.DN) //denormals are considered 0
temp|=(1<<15); temp|=(1<<15);
asm("ldmxcsr %0" : : "m"(temp)); asm("ldmxcsr %0" : : "m"(temp));
#endif #elif HOST_CPU==CPU_ARM
#elif HOST_CPU==CPU_ARM
static const unsigned int x = 0x04086060; static const unsigned int x = 0x04086060;
unsigned int y = 0x02000000; unsigned int y = 0x02000000;
if (fpscr.RM==1) //if round to 0 , set the flag if (fpscr.RM==1) //if round to 0 , set the flag
@ -118,6 +117,9 @@ void SetFloatStatusReg()
: "=r"(raa) : "=r"(raa)
: "r"(x), "r"(y) : "r"(x), "r"(y)
); );
#else
printf("SetFloatStatusReg: Unsupported platform\n");
#endif
#endif #endif
} }