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Diffstat (limited to 'src/pkg/math/frexp_386.s')
-rw-r--r-- | src/pkg/math/frexp_386.s | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/pkg/math/frexp_386.s b/src/pkg/math/frexp_386.s new file mode 100644 index 000000000..177c4b97b --- /dev/null +++ b/src/pkg/math/frexp_386.s @@ -0,0 +1,23 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// func Frexp(x float64) (f float64, e int) +TEXT ·Frexp(SB),7,$0 + FMOVD x+0(FP), F0 // F0=x + FXAM + FSTSW AX + SAHF + JNP nan_zero_inf + JCS nan_zero_inf + FXTRACT // F0=f (0<=f<1), F1=e + FMULD $(0.5), F0 // F0=f (0.5<=f<1), F1=e + FMOVDP F0, f+8(FP) // F0=e + FLD1 // F0=1, F1=e + FADDDP F0, F1 // F0=e+1 + FMOVLP F0, e+16(FP) // (int=int32) + RET +nan_zero_inf: + FMOVDP F0, f+8(FP) // F0=e + MOVL $0, e+16(FP) // e=0 + RET |