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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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4
src/x87_ops_arith.h
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@ -5,7 +5,11 @@ static int opFADD ## name ## _a ## a_size(uint32_t fetchdat) \
FP_ENTER(); \
fetch_ea_ ## a_size(fetchdat); \
load_var = get(); if (abrt) return 1; \
if ((npxc >> 10) & 3) \
fesetround(rounding_modes[(npxc >> 10) & 3]); \
ST(0) += use_var; \
if ((npxc >> 10) & 3) \
fesetround(FE_TONEAREST); \
tag[TOP] &= ~TAG_UINT64; \
CLOCK_CYCLES(8); \
return 0; \