summaryrefslogtreecommitdiff
path: root/src/pkg/math/exp_386.s
diff options
context:
space:
mode:
Diffstat (limited to 'src/pkg/math/exp_386.s')
-rw-r--r--src/pkg/math/exp_386.s41
1 files changed, 0 insertions, 41 deletions
diff --git a/src/pkg/math/exp_386.s b/src/pkg/math/exp_386.s
deleted file mode 100644
index af2d680d5..000000000
--- a/src/pkg/math/exp_386.s
+++ /dev/null
@@ -1,41 +0,0 @@
-// 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.
-
-#include "../../cmd/ld/textflag.h"
-
-// func Exp(x float64) float64
-TEXT ·Exp(SB),NOSPLIT,$0
-// test bits for not-finite
- MOVL x_hi+4(FP), AX
- ANDL $0x7ff00000, AX
- CMPL AX, $0x7ff00000
- JEQ not_finite
- FLDL2E // F0=log2(e)
- FMULD x+0(FP), F0 // F0=x*log2(e)
- FMOVD F0, F1 // F0=x*log2(e), F1=x*log2(e)
- FRNDINT // F0=int(x*log2(e)), F1=x*log2(e)
- FSUBD F0, F1 // F0=int(x*log2(e)), F1=x*log2(e)-int(x*log2(e))
- FXCHD F0, F1 // F0=x*log2(e)-int(x*log2(e)), F1=int(x*log2(e))
- F2XM1 // F0=2**(x*log2(e)-int(x*log2(e)))-1, F1=int(x*log2(e))
- FLD1 // F0=1, F1=2**(x*log2(e)-int(x*log2(e)))-1, F2=int(x*log2(e))
- FADDDP F0, F1 // F0=2**(x*log2(e)-int(x*log2(e))), F1=int(x*log2(e))
- FSCALE // F0=e**x, F1=int(x*log2(e))
- FMOVDP F0, F1 // F0=e**x
- FMOVDP F0, ret+8(FP)
- RET
-not_finite:
-// test bits for -Inf
- MOVL x_hi+4(FP), BX
- MOVL x_lo+0(FP), CX
- CMPL BX, $0xfff00000
- JNE not_neginf
- CMPL CX, $0
- JNE not_neginf
- FLDZ // F0=0
- FMOVDP F0, ret+8(FP)
- RET
-not_neginf:
- MOVL CX, ret_lo+8(FP)
- MOVL BX, ret_hi+12(FP)
- RET