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More changes to FPU nearest rounding, Unreal works again.

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This commit is contained in:
TomW 2015-09-28 20:33:36 +01:00
commit 33685c3318
3 changed files with 40 additions and 13 deletions
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11
src/codegen_ops_x86-64.h
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@ -3737,10 +3737,19 @@ static void FP_LOAD_REG_D(int reg, int *host_reg1, int *host_reg2)
}
static int64_t x87_fround(double b)
{
int64_t a, c;
switch ((npxc>>10)&3)
{
case 0: /*Nearest*/
return (int64_t)(b+0.5);
a = (int64_t)floor(b);
c = (int64_t)floor(b + 1.0);
if ((b - a) < (b - c))
return a;
else if ((b - a) > (b - c))
return b;
else
return (a & 1) ? c : a;
case 1: /*Down*/
return (int64_t)floor(b);
case 2: /*Up*/