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more accuracy fixes

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@186 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-07-07 14:54:33 +00:00
parent 2d0b15bb2c
commit 1c88b865ce
5 changed files with 57 additions and 34 deletions
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5
cpu/Cyclone/OpLogic.cpp
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@ -403,7 +403,7 @@ static int EmitAsr(int op,int type,int dir,int count,int size,int usereg)
ot("\n");
}
if (type==0 && dir) ot(" mov r3,r0 ;@ save old value for V flag calculation\n");
if (type==0 && dir) ot(" adds r3,r0,#0 ;@ save old value for V flag calculation, also clear V\n");
ot(";@ Shift register:\n");
if (type==0) ot(" movs r0,r0,%s %s\n",dir?"asl":"asr",pct);
@ -434,7 +434,8 @@ static int EmitAsr(int op,int type,int dir,int count,int size,int usereg)
ot(" mov r1,#0x80000000\n");
ot(" ands r3,r3,r1,asr %s\n", pct);
ot(" cmpne r3,r1,asr %s\n", pct);
ot(" biceq r9,r9,#0x10000000\n");
ot(" eoreq r1,r0,r3\n"); // above check doesn't catch (-1)<<(32+), so we need this
ot(" tsteq r1,#0x80000000\n");
ot(" orrne r9,r9,#0x10000000\n");
ot("\n");
}