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FPU rounding modes now have effect in FADD double precision. Fixes rendering in Interstate '76.

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This commit is contained in:
TomW 2015-09-21 21:54:43 +01:00
commit 986476b9db
4 changed files with 75 additions and 0 deletions
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33
src/codegen_ops_x86-64.h
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@ -4080,7 +4080,40 @@ static void FP_OP_D(int op)
addbyte(0x0f);
addbyte(0x6e);
addbyte(0xc8);
if (((npxc >> 10) & 3) && op == FPU_ADD)
{
addbyte(0x0f); /*STMXCSR [ESP+8]*/
addbyte(0xae);
addbyte(0x5c);
addbyte(0x24);
addbyte(0x08);
addbyte(0x8b); /*MOV EAX, [ESP+8]*/
addbyte(0x44);
addbyte(0x24);
addbyte(0x08);
addbyte(0x25); /*AND EAX, ~(3 << 13)*/
addlong(~(3 << 10));
addbyte(0x0d); /*OR EAX, (npxc & (3 << 10)) << 3*/
addlong((npxc & (3 << 10)) << 3);
addbyte(0x89); /*MOV [RSP+12], EAX*/
addbyte(0x44);
addbyte(0x24);
addbyte(0x0c);
addbyte(0x0f); /*LDMXCSR [RSP+12]*/
addbyte(0xae);
addbyte(0x54);
addbyte(0x24);
addbyte(0x0c);
}
FP_OP_MEM(op);
if (((npxc >> 10) & 3) && op == FPU_ADD)
{
addbyte(0x0f); /*LDMXCSR [RSP+8]*/
addbyte(0xae);
addbyte(0x54);
addbyte(0x24);
addbyte(0x08);
}
}
static void FP_OP_IW(int op)
{