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Diffstat (limited to 'src/math/modf_386.s')
| -rw-r--r-- | src/math/modf_386.s | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/math/modf_386.s b/src/math/modf_386.s index 3debd3b95d..d549f1d1a0 100644 --- a/src/math/modf_386.s +++ b/src/math/modf_386.s @@ -6,6 +6,19 @@ // func Modf(f float64) (int float64, frac float64) TEXT ·Modf(SB),NOSPLIT,$0 + // special case for f == -0.0 + MOVL f+4(FP), DX // high word + MOVL f+0(FP), AX // low word + CMPL DX, $(1<<31) // beginning of -0.0 + JNE notNegativeZero + CMPL AX, $0 // could be denormalized + JNE notNegativeZero + MOVL AX, int+8(FP) + MOVL DX, int+12(FP) + MOVL AX, frac+16(FP) + MOVL DX, frac+20(FP) + RET +notNegativeZero: FMOVD f+0(FP), F0 // F0=f FMOVD F0, F1 // F0=f, F1=f FSTCW -2(SP) // save old Control Word |