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Issue 3539003: Fix up RET instructions in sysdeps/i386/fpu (Closed) Base URL: ssh://gitrw.chromium.org/nacl-glibc
Patch Set: Created 10 years, 2 months ago
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1 /* ix87 specific implementation of exp(x)-1. 1 /* ix87 specific implementation of exp(x)-1.
2 Copyright (C) 1996, 1997, 2002, 2005, 2008 Free Software Foundation, Inc. 2 Copyright (C) 1996, 1997, 2002, 2005, 2008 Free Software Foundation, Inc.
3 This file is part of the GNU C Library. 3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. 4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
5 Based on code by John C. Bowman <bowman@ipp-garching.mpg.de>. 5 Based on code by John C. Bowman <bowman@ipp-garching.mpg.de>.
6 Corrections by H.J. Lu (hjl@gnu.ai.mit.edu), 1997. 6 Corrections by H.J. Lu (hjl@gnu.ai.mit.edu), 1997.
7 7
8 The GNU C Library is free software; you can redistribute it and/or 8 The GNU C Library is free software; you can redistribute it and/or
9 modify it under the terms of the GNU Lesser General Public 9 modify it under the terms of the GNU Lesser General Public
10 License as published by the Free Software Foundation; either 10 License as published by the Free Software Foundation; either
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73 fsubr %st, %st(1) // int(log2(e)*x) : fract(log2(e)*x) 73 fsubr %st, %st(1) // int(log2(e)*x) : fract(log2(e)*x)
74 fxch // fract(log2(e)*x) : int(log2(e)*x) 74 fxch // fract(log2(e)*x) : int(log2(e)*x)
75 f2xm1 // 2^fract(log2(e)*x)-1 : int(log2(e)*x) 75 f2xm1 // 2^fract(log2(e)*x)-1 : int(log2(e)*x)
76 fscale // 2^(log2(e)*x)-2^int(log2(e)*x) : int(log2(e)* x) 76 fscale // 2^(log2(e)*x)-2^int(log2(e)*x) : int(log2(e)* x)
77 fxch // int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)* x) 77 fxch // int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)* x)
78 fldl MO(one) // 1 : int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2 (e)*x) 78 fldl MO(one) // 1 : int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2 (e)*x)
79 fscale // 2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2(e )*x)-2^int(log2(e)*x) 79 fscale // 2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2(e )*x)-2^int(log2(e)*x)
80 fsubrl MO(one) // 1-2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2 (e)*x)-2^int(log2(e)*x) 80 fsubrl MO(one) // 1-2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2 (e)*x)-2^int(log2(e)*x)
81 fstp %st(1) // 1-2^int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2 (e)*x) 81 fstp %st(1) // 1-2^int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2 (e)*x)
82 fsubrp %st, %st(1) // 2^(log2(e)*x) 82 fsubrp %st, %st(1) // 2^(log2(e)*x)
83 » ret 83 » NACLRET
84 84
85 2: testl $0x200, %eax // Test sign. 85 2: testl $0x200, %eax // Test sign.
86 jz 3f // If positive, jump. 86 jz 3f // If positive, jump.
87 fstp %st 87 fstp %st
88 fldl MO(minus1) // Set result to -1.0. 88 fldl MO(minus1) // Set result to -1.0.
89 3:» ret 89 3:» NACLRET
90 END(__expm1l) 90 END(__expm1l)
91 libm_hidden_def (__expm1l) 91 libm_hidden_def (__expm1l)
92 weak_alias (__expm1l, expm1l) 92 weak_alias (__expm1l, expm1l)
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