From de800d83059dbedb7d151580f0a3bdc9eaf37340 Mon Sep 17 00:00:00 2001 From: Szabolcs Nagy Date: Tue, 30 Jan 2018 14:48:22 +0000 Subject: Remove slow paths from exp Remove the __slowexp code, so exp is no longer correctly rounded. The result is computed to about 70 bits precision so the worst case ulp error is about 0.500007 in nearest rounding mode. * manual/probes.texi: Remove slowexp probes. * math/Makefile: Remove slowexp. * sysdeps/generic/math_private.h (__slowexp): Remove. * sysdeps/ieee754/dbl-64/e_exp.c (__ieee754_exp): Remove __slowexp and document error bounds. * sysdeps/i386/fpu/slowexp.c: Remove. * sysdeps/ia64/fpu/slowexp.c: Remove. * sysdeps/ieee754/dbl-64/slowexp.c: Remove. * sysdeps/ieee754/dbl-64/uexp.h (err_0): Remove. * sysdeps/m68k/m680x0/fpu/slowexp.c: Remove. * sysdeps/powerpc/power4/fpu/Makefile (CPPFLAGS-slowexp.c): Remove. * sysdeps/x86_64/fpu/multiarch/Makefile: Remove slowexp-fma. * sysdeps/x86_64/fpu/multiarch/e_exp-avx.c (__slowexp): Remove. * sysdeps/x86_64/fpu/multiarch/e_exp-fma.c (__slowexp): Remove. * sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c (__slowexp): Remove. * sysdeps/x86_64/fpu/multiarch/slowexp-avx.c: Remove. * sysdeps/x86_64/fpu/multiarch/slowexp-fma.c: Remove. * sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c: Remove. --- sysdeps/x86_64/fpu/multiarch/Makefile | 9 +++------ sysdeps/x86_64/fpu/multiarch/e_exp-avx.c | 1 - sysdeps/x86_64/fpu/multiarch/e_exp-fma.c | 1 - sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c | 1 - sysdeps/x86_64/fpu/multiarch/slowexp-avx.c | 9 --------- sysdeps/x86_64/fpu/multiarch/slowexp-fma.c | 9 --------- sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c | 9 --------- 7 files changed, 3 insertions(+), 36 deletions(-) delete mode 100644 sysdeps/x86_64/fpu/multiarch/slowexp-avx.c delete mode 100644 sysdeps/x86_64/fpu/multiarch/slowexp-fma.c delete mode 100644 sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c (limited to 'sysdeps/x86_64/fpu/multiarch') diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile index 9391eb5511..9a0283850a 100644 --- a/sysdeps/x86_64/fpu/multiarch/Makefile +++ b/sysdeps/x86_64/fpu/multiarch/Makefile @@ -10,7 +10,7 @@ libm-sysdep_routines += s_ceil-sse4_1 s_ceilf-sse4_1 s_floor-sse4_1 \ libm-sysdep_routines += e_exp-fma e_log-fma e_pow-fma s_atan-fma \ e_asin-fma e_atan2-fma s_sin-fma s_tan-fma \ - mplog-fma mpa-fma slowexp-fma \ + mplog-fma mpa-fma \ sincos32-fma doasin-fma dosincos-fma \ mpexp-fma \ mpatan2-fma mpatan-fma mpsqrt-fma mptan-fma @@ -31,7 +31,6 @@ CFLAGS-mpsqrt-fma.c = -mfma -mavx2 CFLAGS-mptan-fma.c = -mfma -mavx2 CFLAGS-s_atan-fma.c = -mfma -mavx2 CFLAGS-sincos32-fma.c = -mfma -mavx2 -CFLAGS-slowexp-fma.c = -mfma -mavx2 CFLAGS-s_sin-fma.c = -mfma -mavx2 CFLAGS-s_tan-fma.c = -mfma -mavx2 @@ -51,7 +50,7 @@ CFLAGS-s_sincosf-fma.c = -mfma -mavx2 libm-sysdep_routines += e_exp-fma4 e_log-fma4 e_pow-fma4 s_atan-fma4 \ e_asin-fma4 e_atan2-fma4 s_sin-fma4 s_tan-fma4 \ - mplog-fma4 mpa-fma4 slowexp-fma4 \ + mplog-fma4 mpa-fma4 \ sincos32-fma4 doasin-fma4 dosincos-fma4 \ mpexp-fma4 \ mpatan2-fma4 mpatan-fma4 mpsqrt-fma4 mptan-fma4 @@ -72,13 +71,12 @@ CFLAGS-mpsqrt-fma4.c = -mfma4 CFLAGS-mptan-fma4.c = -mfma4 CFLAGS-s_atan-fma4.c = -mfma4 CFLAGS-sincos32-fma4.c = -mfma4 -CFLAGS-slowexp-fma4.c = -mfma4 CFLAGS-s_sin-fma4.c = -mfma4 CFLAGS-s_tan-fma4.c = -mfma4 libm-sysdep_routines += e_exp-avx e_log-avx s_atan-avx \ e_atan2-avx s_sin-avx s_tan-avx \ - mplog-avx mpa-avx slowexp-avx \ + mplog-avx mpa-avx \ mpexp-avx CFLAGS-e_atan2-avx.c = -msse2avx -DSSE2AVX @@ -89,7 +87,6 @@ CFLAGS-mpexp-avx.c = -msse2avx -DSSE2AVX CFLAGS-mplog-avx.c = -msse2avx -DSSE2AVX CFLAGS-s_atan-avx.c = -msse2avx -DSSE2AVX CFLAGS-s_sin-avx.c = -msse2avx -DSSE2AVX -CFLAGS-slowexp-avx.c = -msse2avx -DSSE2AVX CFLAGS-s_tan-avx.c = -msse2avx -DSSE2AVX endif diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c b/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c index ee5dd6d2dc..afd917442a 100644 --- a/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c +++ b/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c @@ -1,6 +1,5 @@ #define __ieee754_exp __ieee754_exp_avx #define __exp1 __exp1_avx -#define __slowexp __slowexp_avx #define SECTION __attribute__ ((section (".text.avx"))) #include diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c b/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c index 6e0fdb7941..765b1b9dd3 100644 --- a/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c +++ b/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c @@ -1,6 +1,5 @@ #define __ieee754_exp __ieee754_exp_fma #define __exp1 __exp1_fma -#define __slowexp __slowexp_fma #define SECTION __attribute__ ((section (".text.fma"))) #include diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c b/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c index ae6eb67603..9ac7acad28 100644 --- a/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c +++ b/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c @@ -1,6 +1,5 @@ #define __ieee754_exp __ieee754_exp_fma4 #define __exp1 __exp1_fma4 -#define __slowexp __slowexp_fma4 #define SECTION __attribute__ ((section (".text.fma4"))) #include diff --git a/sysdeps/x86_64/fpu/multiarch/slowexp-avx.c b/sysdeps/x86_64/fpu/multiarch/slowexp-avx.c deleted file mode 100644 index d01c6d71a4..0000000000 --- a/sysdeps/x86_64/fpu/multiarch/slowexp-avx.c +++ /dev/null @@ -1,9 +0,0 @@ -#define __slowexp __slowexp_avx -#define __add __add_avx -#define __dbl_mp __dbl_mp_avx -#define __mpexp __mpexp_avx -#define __mul __mul_avx -#define __sub __sub_avx -#define SECTION __attribute__ ((section (".text.avx"))) - -#include diff --git a/sysdeps/x86_64/fpu/multiarch/slowexp-fma.c b/sysdeps/x86_64/fpu/multiarch/slowexp-fma.c deleted file mode 100644 index 6fffca1a93..0000000000 --- a/sysdeps/x86_64/fpu/multiarch/slowexp-fma.c +++ /dev/null @@ -1,9 +0,0 @@ -#define __slowexp __slowexp_fma -#define __add __add_fma -#define __dbl_mp __dbl_mp_fma -#define __mpexp __mpexp_fma -#define __mul __mul_fma -#define __sub __sub_fma -#define SECTION __attribute__ ((section (".text.fma"))) - -#include diff --git a/sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c b/sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c deleted file mode 100644 index 3bcde84233..0000000000 --- a/sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c +++ /dev/null @@ -1,9 +0,0 @@ -#define __slowexp __slowexp_fma4 -#define __add __add_fma4 -#define __dbl_mp __dbl_mp_fma4 -#define __mpexp __mpexp_fma4 -#define __mul __mul_fma4 -#define __sub __sub_fma4 -#define SECTION __attribute__ ((section (".text.fma4"))) - -#include -- cgit 1.4.1