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Implement accurate fma.
This commit is contained in:
Jakub Jelinek
Ulrich Drepper
parent
f90681487d
commit
5e908464b9
32
ChangeLog
32
ChangeLog
@ -1,3 +1,35 @@
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2010-10-13 Jakub Jelinek <jakub@redhat.com>
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[BZ #3268]
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* math/libm-test.inc (fma_test): Some more fmaf and fma tests.
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* sysdeps/i386/i686/multiarch/s_fma.c: Include ldbl-96 version
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instead of dbl-64.
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* sysdeps/i386/fpu/bits/mathinline.h (fma, fmaf, fmal): Remove
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inlines.
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* sysdeps/ieee754/ldbl-96/s_fma.c: New file.
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* sysdeps/ieee754/dbl-64/s_fma.c (__fma): Fix exponent adjustment
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if one of x and y is very large and the other is subnormal.
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* sysdeps/s390/fpu/s_fmaf.c: New file.
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* sysdeps/s390/fpu/s_fma.c: New file.
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* sysdeps/powerpc/fpu/s_fmaf.S: New file.
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* sysdeps/powerpc/fpu/s_fma.S: New file.
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* sysdeps/powerpc/powerpc32/fpu/s_fma.S: New file.
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* sysdeps/powerpc/powerpc64/fpu/s_fma.S: New file.
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* sysdeps/unix/sysv/linux/s390/fpu/s_fma.c: New file.
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2010-10-12 Jakub Jelinek <jakub@redhat.com>
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[BZ #3268]
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* math/libm-test.inc (fma_test): Add some more fmaf tests, add
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fma tests.
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* sysdeps/ieee754/dbl-64/s_fmaf.c (__fmaf): Fix Inf/Nan check.
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* sysdeps/ieee754/dbl-64/s_fma.c: New file.
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* sysdeps/i386/i686/multiarch/s_fma.c: Include
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sysdeps/ieee754/dbl-64/s_fma.c instead of math/s_fma.c.
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* sysdeps/x86_64/multiarch/s_fma.c: Likewise.
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* sysdeps/ieee754/ldbl-opt/s_fma.c: Likewise.
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* sysdeps/ieee754/ldbl-128/s_fma.c: New file.
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2010-10-12 Ulrich Drepper <drepper@redhat.com>
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[BZ #12078]
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@ -2789,9 +2789,25 @@ fma_test (void)
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TEST_fff_f (fma, minus_infty, minus_infty, minus_infty, nan_value, INVALID_EXCEPTION);
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TEST_fff_f (fma, 1.25L, 0.75L, 0.0625L, 1.0L);
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#ifdef TEST_FLOAT
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#if defined (TEST_FLOAT) && FLT_MANT_DIG == 24
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TEST_fff_f (fma, 0x1.7ff8p+13, 0x1.000002p+0, 0x1.ffffp-24, 0x1.7ff802p+13);
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TEST_fff_f (fma, 0x1.fffp+0, 0x1.00001p+0, -0x1.fffp+0, 0x1.fffp-20);
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TEST_fff_f (fma, 0x1.9abcdep+127, 0x0.9abcdep-126, -0x1.f08948p+0, 0x1.bb421p-25);
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TEST_fff_f (fma, 0x1.9abcdep+100, 0x0.9abcdep-126, -0x1.f08948p-27, 0x1.bb421p-52);
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TEST_fff_f (fma, 0x1.fffffep+127, 0x1.001p+0, -0x1.fffffep+127, 0x1.fffffep+115);
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TEST_fff_f (fma, -0x1.fffffep+127, 0x1.fffffep+0, 0x1.fffffep+127, -0x1.fffffap+127);
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TEST_fff_f (fma, 0x1.fffffep+127, 2.0, -0x1.fffffep+127, 0x1.fffffep+127);
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#endif
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#if defined (TEST_DOUBLE) && DBL_MANT_DIG == 53
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TEST_fff_f (fma, 0x1.7fp+13, 0x1.0000000000001p+0, 0x1.ffep-48, 0x1.7f00000000001p+13);
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TEST_fff_f (fma, 0x1.fffp+0, 0x1.0000000000001p+0, -0x1.fffp+0, 0x1.fffp-52);
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TEST_fff_f (fma, 0x1.0000002p+0, 0x1.ffffffcp-1, 0x1p-300, 1.0);
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TEST_fff_f (fma, 0x1.0000002p+0, 0x1.ffffffcp-1, -0x1p-300, 0x1.fffffffffffffp-1);
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TEST_fff_f (fma, 0x1.deadbeef2feedp+1023, 0x0.deadbeef2feedp-1022, -0x1.a05f8c01a4bfbp+1, 0x1.0989687bc9da4p-53);
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TEST_fff_f (fma, 0x1.deadbeef2feedp+900, 0x0.deadbeef2feedp-1022, -0x1.a05f8c01a4bfbp-122, 0x1.0989687bc9da4p-176);
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TEST_fff_f (fma, 0x1.fffffffffffffp+1023, 0x1.001p+0, -0x1.fffffffffffffp+1023, 0x1.fffffffffffffp+1011);
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TEST_fff_f (fma, -0x1.fffffffffffffp+1023, 0x1.fffffffffffffp+0, 0x1.fffffffffffffp+1023, -0x1.ffffffffffffdp+1023);
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TEST_fff_f (fma, 0x1.fffffffffffffp+1023, 2.0, -0x1.fffffffffffffp+1023, 0x1.fffffffffffffp+1023);
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#endif
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END (fma);
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@ -1,6 +1,6 @@
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/* Inline math functions for i387.
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Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2003,2004,2006,2007,2009
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Free Software Foundation, Inc.
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Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2003,2004,2006,2007,2009,
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2010 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by John C. Bowman <bowman@math.ualberta.ca>, 1995.
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@ -657,8 +657,6 @@ __NTH (ldexpl (long double __x, int __y))
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__ldexp_code;
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}
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__inline_mathcodeNP3 (fma, __x, __y, __z, return (__x * __y) + __z)
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__inline_mathopNP (rint, "frndint")
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# endif /* __FAST_MATH__ */
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@ -33,4 +33,4 @@ weak_alias (__fma, fma)
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# define __fma __fma_ia32
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#endif
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#include <math/s_fma.c>
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#include <sysdeps/ieee754/ldbl-96/s_fma.c>
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146
sysdeps/ieee754/dbl-64/s_fma.c
Normal file
146
sysdeps/ieee754/dbl-64/s_fma.c
Normal file
@ -0,0 +1,146 @@
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/* Compute x * y + z as ternary operation.
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Copyright (C) 2010 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <float.h>
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#include <math.h>
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#include <fenv.h>
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#include <ieee754.h>
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/* This implementation uses rounding to odd to avoid problems with
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double rounding. See a paper by Boldo and Melquiond:
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http://www.lri.fr/~melquion/doc/08-tc.pdf */
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double
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__fma (double x, double y, double z)
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{
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union ieee754_double u, v, w;
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int adjust = 0;
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u.d = x;
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v.d = y;
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w.d = z;
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if (__builtin_expect (u.ieee.exponent + v.ieee.exponent
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>= 0x7ff + IEEE754_DOUBLE_BIAS - DBL_MANT_DIG, 0)
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|| __builtin_expect (u.ieee.exponent >= 0x7ff - DBL_MANT_DIG, 0)
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|| __builtin_expect (v.ieee.exponent >= 0x7ff - DBL_MANT_DIG, 0)
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|| __builtin_expect (w.ieee.exponent >= 0x7ff - DBL_MANT_DIG, 0))
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{
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/* If x or y or z is Inf/NaN or if fma will certainly overflow,
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compute as x * y + z. */
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if (u.ieee.exponent == 0x7ff
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|| v.ieee.exponent == 0x7ff
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|| w.ieee.exponent == 0x7ff
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|| u.ieee.exponent + v.ieee.exponent
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> 0x7ff + IEEE754_DOUBLE_BIAS)
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return x * y + z;
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if (u.ieee.exponent + v.ieee.exponent
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>= 0x7ff + IEEE754_DOUBLE_BIAS - DBL_MANT_DIG)
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{
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/* Compute 1p-53 times smaller result and multiply
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at the end. */
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if (u.ieee.exponent > v.ieee.exponent)
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u.ieee.exponent -= DBL_MANT_DIG;
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else
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v.ieee.exponent -= DBL_MANT_DIG;
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/* If x + y exponent is very large and z exponent is very small,
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it doesn't matter if we don't adjust it. */
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if (w.ieee.exponent > DBL_MANT_DIG)
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w.ieee.exponent -= DBL_MANT_DIG;
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adjust = 1;
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}
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else if (w.ieee.exponent >= 0x7ff - DBL_MANT_DIG)
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{
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/* Similarly.
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If z exponent is very large and x and y exponents are
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very small, it doesn't matter if we don't adjust it. */
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if (u.ieee.exponent > v.ieee.exponent)
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{
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if (u.ieee.exponent > DBL_MANT_DIG)
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u.ieee.exponent -= DBL_MANT_DIG;
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}
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else if (v.ieee.exponent > DBL_MANT_DIG)
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v.ieee.exponent -= DBL_MANT_DIG;
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w.ieee.exponent -= DBL_MANT_DIG;
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adjust = 1;
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}
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else if (u.ieee.exponent >= 0x7ff - DBL_MANT_DIG)
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{
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u.ieee.exponent -= DBL_MANT_DIG;
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if (v.ieee.exponent)
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v.ieee.exponent += DBL_MANT_DIG;
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else
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v.d *= 0x1p53;
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}
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else
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{
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v.ieee.exponent -= DBL_MANT_DIG;
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if (u.ieee.exponent)
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u.ieee.exponent += DBL_MANT_DIG;
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else
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u.d *= 0x1p53;
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}
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x = u.d;
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y = v.d;
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z = w.d;
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}
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/* Multiplication m1 + m2 = x * y using Dekker's algorithm. */
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#define C ((1 << (DBL_MANT_DIG + 1) / 2) + 1)
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double x1 = x * C;
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double y1 = y * C;
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double m1 = x * y;
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x1 = (x - x1) + x1;
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y1 = (y - y1) + y1;
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double x2 = x - x1;
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double y2 = y - y1;
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double m2 = (((x1 * y1 - m1) + x1 * y2) + x2 * y1) + x2 * y2;
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/* Addition a1 + a2 = z + m1 using Knuth's algorithm. */
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double a1 = z + m1;
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double t1 = a1 - z;
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double t2 = a1 - t1;
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t1 = m1 - t1;
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t2 = z - t2;
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double a2 = t1 + t2;
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fenv_t env;
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feholdexcept (&env);
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fesetround (FE_TOWARDZERO);
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/* Perform m2 + a2 addition with round to odd. */
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u.d = a2 + m2;
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if ((u.ieee.mantissa1 & 1) == 0 && u.ieee.exponent != 0x7ff)
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u.ieee.mantissa1 |= fetestexcept (FE_INEXACT) != 0;
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feupdateenv (&env);
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/* Add that to a1. */
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a1 = a1 + u.d;
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/* And adjust exponent if needed. */
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if (__builtin_expect (adjust, 0))
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a1 *= 0x1p53;
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return a1;
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}
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#ifndef __fma
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weak_alias (__fma, fma)
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#endif
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#ifdef NO_LONG_DOUBLE
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strong_alias (__fma, __fmal)
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weak_alias (__fmal, fmal)
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#endif
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@ -39,7 +39,7 @@ __fmaf (float x, float y, float z)
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fesetround (FE_TOWARDZERO);
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/* Perform addition with round to odd. */
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u.d = temp + (double) z;
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if ((u.ieee.mantissa1 & 1) == 0 && u.ieee.exponent != 0xff)
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if ((u.ieee.mantissa1 & 1) == 0 && u.ieee.exponent != 0x7ff)
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u.ieee.mantissa1 |= fetestexcept (FE_INEXACT) != 0;
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feupdateenv (&env);
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/* And finally truncation with round to nearest. */
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50
sysdeps/ieee754/ldbl-128/s_fma.c
Normal file
50
sysdeps/ieee754/ldbl-128/s_fma.c
Normal file
@ -0,0 +1,50 @@
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/* Compute x * y + z as ternary operation.
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Copyright (C) 2010 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
|
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License as published by the Free Software Foundation; either
|
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version 2.1 of the License, or (at your option) any later version.
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|
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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Lesser General Public License for more details.
|
||||
|
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You should have received a copy of the GNU Lesser General Public
|
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License along with the GNU C Library; if not, write to the Free
|
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <math.h>
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#include <fenv.h>
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#include <ieee754.h>
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/* This implementation relies on long double being more than twice as
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precise as double and uses rounding to odd in order to avoid problems
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with double rounding.
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See a paper by Boldo and Melquiond:
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http://www.lri.fr/~melquion/doc/08-tc.pdf */
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double
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__fma (double x, double y, double z)
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{
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fenv_t env;
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/* Multiplication is always exact. */
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long double temp = (long double) x * (long double) y;
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union ieee854_long_double u;
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feholdexcept (&env);
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fesetround (FE_TOWARDZERO);
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/* Perform addition with round to odd. */
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u.d = temp + (long double) z;
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if ((u.ieee.mantissa3 & 1) == 0 && u.ieee.exponent != 0x7fff)
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u.ieee.mantissa3 |= fetestexcept (FE_INEXACT) != 0;
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feupdateenv (&env);
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/* And finally truncation with round to nearest. */
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return (double) u.d;
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}
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#ifndef __fma
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weak_alias (__fma, fma)
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#endif
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70
sysdeps/ieee754/ldbl-96/s_fma.c
Normal file
70
sysdeps/ieee754/ldbl-96/s_fma.c
Normal file
@ -0,0 +1,70 @@
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/* Compute x * y + z as ternary operation.
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Copyright (C) 2010 Free Software Foundation, Inc.
|
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This file is part of the GNU C Library.
|
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
|
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|
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The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
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02111-1307 USA. */
|
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|
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#include <float.h>
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#include <math.h>
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#include <fenv.h>
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#include <ieee754.h>
|
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|
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/* This implementation uses rounding to odd to avoid problems with
|
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double rounding. See a paper by Boldo and Melquiond:
|
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http://www.lri.fr/~melquion/doc/08-tc.pdf */
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double
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__fma (double x, double y, double z)
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{
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/* Multiplication m1 + m2 = x * y using Dekker's algorithm. */
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#define C ((1ULL << (LDBL_MANT_DIG + 1) / 2) + 1)
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long double x1 = x * C;
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long double y1 = y * C;
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long double m1 = x * y;
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x1 = (x - x1) + x1;
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y1 = (y - y1) + y1;
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long double x2 = x - x1;
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long double y2 = y - y1;
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long double m2 = (((x1 * y1 - m1) + x1 * y2) + x2 * y1) + x2 * y2;
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/* Addition a1 + a2 = z + m1 using Knuth's algorithm. */
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long double a1 = z + m1;
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long double t1 = a1 - z;
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long double t2 = a1 - t1;
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t1 = m1 - t1;
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t2 = z - t2;
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long double a2 = t1 + t2;
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fenv_t env;
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feholdexcept (&env);
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fesetround (FE_TOWARDZERO);
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/* Perform m2 + a2 addition with round to odd. */
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a2 = a2 + m2;
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/* Add that to a1 again using rounding to odd. */
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union ieee854_long_double u;
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u.d = a1 + a2;
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if ((u.ieee.mantissa1 & 1) == 0 && u.ieee.exponent != 0x7fff)
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u.ieee.mantissa1 |= fetestexcept (FE_INEXACT) != 0;
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feupdateenv (&env);
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/* Add finally round to double precision. */
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return u.d;
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}
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#ifndef __fma
|
||||
weak_alias (__fma, fma)
|
||||
#endif
|
||||
@ -1,5 +1,5 @@
|
||||
#include <math_ldbl_opt.h>
|
||||
#include <math/s_fma.c>
|
||||
#include <sysdeps/ieee754/dbl-64/s_fma.c>
|
||||
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
|
||||
compat_symbol (libm, __fma, fmal, GLIBC_2_1);
|
||||
#endif
|
||||
|
||||
33
sysdeps/powerpc/fpu/s_fma.S
Normal file
33
sysdeps/powerpc/fpu/s_fma.S
Normal file
@ -0,0 +1,33 @@
|
||||
/* Compute x * y + z as ternary operation. PowerPC version.
|
||||
Copyright (C) 2010 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
ENTRY(__fma)
|
||||
/* double [f1] fma (double [f1] x, double [f2] y, double [f3] z); */
|
||||
fmadd fp1,fp1,fp2,fp3
|
||||
blr
|
||||
END(__fma)
|
||||
|
||||
weak_alias (__fma,fma)
|
||||
|
||||
#ifdef NO_LONG_DOUBLE
|
||||
weak_alias (__fma,__fmal)
|
||||
weak_alias (__fma,fmal)
|
||||
#endif
|
||||
28
sysdeps/powerpc/fpu/s_fmaf.S
Normal file
28
sysdeps/powerpc/fpu/s_fmaf.S
Normal file
@ -0,0 +1,28 @@
|
||||
/* Compute x * y + z as ternary operation. PowerPC version.
|
||||
Copyright (C) 2010 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
ENTRY(__fmaf)
|
||||
/* float [f1] fmaf (float [f1] x, float [f2] y, float [f3] z); */
|
||||
fmadds fp1,fp1,fp2,fp3
|
||||
blr
|
||||
END(__fmaf)
|
||||
|
||||
weak_alias (__fmaf,fmaf)
|
||||
5
sysdeps/powerpc/powerpc32/fpu/s_fma.S
Normal file
5
sysdeps/powerpc/powerpc32/fpu/s_fma.S
Normal file
@ -0,0 +1,5 @@
|
||||
#include <math_ldbl_opt.h>
|
||||
#include <sysdeps/powerpc/fpu/s_fma.S>
|
||||
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
|
||||
compat_symbol (libm, __fma, fmal, GLIBC_2_1)
|
||||
#endif
|
||||
5
sysdeps/powerpc/powerpc64/fpu/s_fma.S
Normal file
5
sysdeps/powerpc/powerpc64/fpu/s_fma.S
Normal file
@ -0,0 +1,5 @@
|
||||
#include <math_ldbl_opt.h>
|
||||
#include <sysdeps/powerpc/fpu/s_fma.S>
|
||||
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
|
||||
compat_symbol (libm, __fma, fmal, GLIBC_2_1)
|
||||
#endif
|
||||
37
sysdeps/s390/fpu/s_fma.c
Normal file
37
sysdeps/s390/fpu/s_fma.c
Normal file
@ -0,0 +1,37 @@
|
||||
/* Compute x * y + z as ternary operation. S/390 version.
|
||||
Copyright (C) 2010 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#include <math.h>
|
||||
|
||||
double
|
||||
__fma (double x, double y, double z)
|
||||
{
|
||||
double r;
|
||||
asm ("madbr %0,%1,%2" : "=f" (r) : "%f" (x), "fR" (y), "0" (z));
|
||||
return r;
|
||||
}
|
||||
#ifndef __fma
|
||||
weak_alias (__fma, fma)
|
||||
#endif
|
||||
|
||||
#ifdef NO_LONG_DOUBLE
|
||||
strong_alias (__fma, __fmal)
|
||||
weak_alias (__fmal, fmal)
|
||||
#endif
|
||||
32
sysdeps/s390/fpu/s_fmaf.c
Normal file
32
sysdeps/s390/fpu/s_fmaf.c
Normal file
@ -0,0 +1,32 @@
|
||||
/* Compute x * y + z as ternary operation. S/390 version.
|
||||
Copyright (C) 2010 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#include <math.h>
|
||||
|
||||
float
|
||||
__fmaf (float x, float y, float z)
|
||||
{
|
||||
float r;
|
||||
asm ("maebr %0,%1,%2" : "=f" (r) : "%f" (x), "fR" (y), "0" (z));
|
||||
return r;
|
||||
}
|
||||
#ifndef __fmaf
|
||||
weak_alias (__fmaf, fmaf)
|
||||
#endif
|
||||
5
sysdeps/unix/sysv/linux/s390/fpu/s_fma.c
Normal file
5
sysdeps/unix/sysv/linux/s390/fpu/s_fma.c
Normal file
@ -0,0 +1,5 @@
|
||||
#include <math_ldbl_opt.h>
|
||||
#include <sysdeps/s390/fpu/s_fma.c>
|
||||
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
|
||||
compat_symbol (libm, __fma, fmal, GLIBC_2_1);
|
||||
#endif
|
||||
@ -1,5 +1,5 @@
|
||||
/* FMA version of fma.
|
||||
Copyright (C) 2009 Free Software Foundation, Inc.
|
||||
Copyright (C) 2009, 2010 Free Software Foundation, Inc.
|
||||
Contributed by Intel Corporation.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
@ -40,4 +40,4 @@ weak_alias (__fma, fma)
|
||||
# define __fma __fma_sse2
|
||||
#endif
|
||||
|
||||
#include <math/s_fma.c>
|
||||
#include <sysdeps/ieee754/dbl-64/s_fma.c>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user