Joseph Myers fa752c6981 Fix powf inaccuracy (bug 18956). ...

The flt-32 version of powf can be inaccurate because of bugs in the
extra-precision calculation of (x-1)/(x+1) or (x-1.5)/(x+1.5) as part
of calculating log(x) with extra precision: a constant used (as part
of adding 1 or 1.5 through integer arithmetic) is incorrect, and then
the code fails to mask a computed high part before using it in
arithmetic that relies on s_h*t_h being exactly representable.  This
patch fixes these bugs.

Tested for x86_64 and x86.  x86_64 ulps for powf removed and
regenerated to reflect reduced ulps from the increased accuracy for
existing tests.

	[BZ #18956]
	* sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Add 0x00400000
	not 0x0040000 for high bit of mantissa.  Mask with 0xfffff000 when
	extracting high part.
	* math/auto-libm-test-in: Add another test of pow.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/x86_64/fpu/libm-test-ulps: Update.

2015-09-26 00:27:06 +00:00

..

multiarch

Fix x86_64 fma4 pow inappropriate contraction (bug 19003).

2015-09-24 16:48:32 +00:00

dla.h

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e_acosl.c

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e_atan2l.c

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e_exp2l.S

Refactor x86_64 libm code forcing underflow exceptions.

2015-09-24 22:25:30 +00:00

e_exp10l.S

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e_expf.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

e_expl.S

Refactor x86_64 libm code forcing underflow exceptions.

2015-09-24 22:25:30 +00:00

e_fmodl.S

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e_ilogbl.S

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e_log2l.S

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e_log10l.S

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e_logl.S

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e_powl.S

Fix pow missing underflows (bug 18825).

2015-09-25 22:29:10 +00:00

e_remainderl.S

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e_scalbl.S

Fix x86/x86_64 scalb (qNaN, -Inf) (bug 16783).

2015-02-24 17:30:02 +00:00

e_sqrt.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

e_sqrtf.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

e_sqrtl.c

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fclrexcpt.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

fedisblxcpt.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

feenablxcpt.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

fegetenv.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

fegetexcept.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

fegetround.c

Fix libm fegetround namespace (bug 17748).

2015-01-02 20:44:42 +00:00

feholdexcpt.c

Fix libm feholdexcept namespace (bug 17748).

2015-01-05 23:06:14 +00:00

fesetenv.c

Fix libm fesetenv namespace (bug 17748).

2015-01-06 23:36:20 +00:00

fesetround.c

Fix libm fesetround namespace (bug 17748).

2015-01-07 00:41:23 +00:00

feupdateenv.c

Fix libm feupdateenv namespace (bug 17748).

2015-01-07 19:01:20 +00:00

fgetexcptflg.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

fraiseexcpt.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

fsetexcptflg.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

ftestexcept.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

Implies

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k_rem_pio2l.c

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libm-test-ulps

Fix powf inaccuracy (bug 18956).

2015-09-26 00:27:06 +00:00

Makefile

Update libmvec multiarch functions for <cpu-features.h>

2015-08-13 03:41:47 -07:00

math_ldbl.h

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math_private.h

…

math-tests-arch.h

Update libmvec multiarch functions for <cpu-features.h>

2015-08-13 03:41:47 -07:00

printf_fphex.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_atanl.c

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s_ceill.S

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s_copysign.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_copysignf.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_copysignl.S

…

s_cosf.S

Align stack to 16 bytes when calling __errno_location

2015-08-05 08:36:27 -07:00

s_expm1l.S

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s_fabs.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fabsf.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fabsl.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fdiml.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_finitel.S

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s_floorl.S

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s_fmax.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fmaxf.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fmaxl.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fmin.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fminf.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fminl.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fpclassifyl.c

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s_isinfl.c

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s_isnanl.c

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s_llrint.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_llrintf.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_llrintl.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_log1pl.S

Set errno for log1p on pole/domain error.

2015-04-13 21:19:27 +02:00

s_logbl.c

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s_lrint.S

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s_lrintf.S

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s_lrintl.S

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s_nearbyintl.S

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s_nextafterl.c

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s_nexttoward.c

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s_nexttowardf.c

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s_rintl.c

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s_scalbnl.S

Make scalbn set errno (bug 6803).

2015-09-16 21:11:00 +00:00

s_signbit.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_signbitf.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_significandl.c

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s_sincosf.S

Align stack to 16 bytes when calling __errno_location

2015-08-05 08:36:27 -07:00

s_sinf.S

Align stack to 16 bytes when calling __errno_location

2015-08-05 08:36:27 -07:00

s_truncl.S

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

svml_d_cos2_core.S

Combination of data tables for x86_64 vector functions sin, cos and sincos.

2015-06-23 19:21:50 +03:00

svml_d_cos4_core_avx.S

Start of series of patches with x86_64 vector math functions.

2015-06-09 14:25:49 +03:00

svml_d_cos4_core.S

Combination of data tables for x86_64 vector functions sin, cos and sincos.

2015-06-23 19:21:50 +03:00

svml_d_cos8_core.S

Combination of data tables for x86_64 vector functions sin, cos and sincos.

2015-06-23 19:21:50 +03:00

svml_d_exp2_core.S

Vector exp for x86_64 and tests.

2015-06-17 15:58:05 +03:00

svml_d_exp4_core_avx.S

Vector exp for x86_64 and tests.

2015-06-17 15:58:05 +03:00

svml_d_exp4_core.S

Vector exp for x86_64 and tests.

2015-06-17 15:58:05 +03:00

svml_d_exp8_core.S

Vector exp for x86_64 and tests.

2015-06-17 15:58:05 +03:00

svml_d_exp_data.h

Vector exp for x86_64 and tests.

2015-06-17 15:58:05 +03:00

svml_d_exp_data.S

Vector exp for x86_64 and tests.

2015-06-17 15:58:05 +03:00

svml_d_log2_core.S

Vector log for x86_64 and tests.

2015-06-17 15:38:29 +03:00

svml_d_log4_core_avx.S

Vector log for x86_64 and tests.

2015-06-17 15:38:29 +03:00

svml_d_log4_core.S

Vector log for x86_64 and tests.

2015-06-17 15:38:29 +03:00

svml_d_log8_core.S

Vector log for x86_64 and tests.

2015-06-17 15:38:29 +03:00

svml_d_log_data.h

Vector log for x86_64 and tests.

2015-06-17 15:38:29 +03:00

svml_d_log_data.S

Vector log for x86_64 and tests.

2015-06-17 15:38:29 +03:00

svml_d_pow2_core.S

Vector pow for x86_64 and tests.

2015-06-17 16:22:26 +03:00

svml_d_pow4_core_avx.S

Vector pow for x86_64 and tests.

2015-06-17 16:22:26 +03:00

svml_d_pow4_core.S

Vector pow for x86_64 and tests.

2015-06-17 16:22:26 +03:00

svml_d_pow8_core.S

Vector pow for x86_64 and tests.

2015-06-17 16:22:26 +03:00

svml_d_pow_data.h

Vector pow for x86_64 and tests.

2015-06-17 16:22:26 +03:00

svml_d_pow_data.S

Vector pow for x86_64 and tests.

2015-06-17 16:22:26 +03:00

svml_d_sin2_core.S

Vector sin for x86_64 and tests.

2015-06-11 17:12:38 +03:00

svml_d_sin4_core_avx.S

Vector sin for x86_64 and tests.

2015-06-11 17:12:38 +03:00

svml_d_sin4_core.S

Vector sin for x86_64 and tests.

2015-06-11 17:12:38 +03:00

svml_d_sin8_core.S

Vector sin for x86_64 and tests.

2015-06-11 17:12:38 +03:00

svml_d_sincos2_core.S

Vector sincos for x86_64 and tests.

2015-06-18 17:55:55 +03:00

svml_d_sincos4_core_avx.S

Vector sincos for x86_64 and tests.

2015-06-18 17:55:55 +03:00

svml_d_sincos4_core.S

Vector sincos for x86_64 and tests.

2015-06-18 17:55:55 +03:00

svml_d_sincos8_core.S

Vector sincos for x86_64 and tests.

2015-06-18 17:55:55 +03:00

svml_d_trig_data.h

Combination of data tables for x86_64 vector functions sin, cos and sincos.

2015-06-23 19:21:50 +03:00

svml_d_trig_data.S

Combination of data tables for x86_64 vector functions sin, cos and sincos.

2015-06-23 19:21:50 +03:00

svml_d_wrapper_impl.h

Fixed several libmvec bugs found during testing on KNL hardware.

2015-07-24 14:47:23 +03:00

svml_s_cosf4_core.S

Vector cosf for x86_64.

2015-06-09 18:29:47 +03:00

svml_s_cosf8_core_avx.S

Vector cosf for x86_64.

2015-06-09 18:29:47 +03:00

svml_s_cosf8_core.S

Vector cosf for x86_64.

2015-06-09 18:29:47 +03:00

svml_s_cosf16_core.S

Vector cosf for x86_64.

2015-06-09 18:29:47 +03:00

svml_s_expf4_core.S

Vector expf for x86_64 and tests.

2015-06-17 16:10:51 +03:00

svml_s_expf8_core_avx.S

Vector expf for x86_64 and tests.

2015-06-17 16:10:51 +03:00

svml_s_expf8_core.S

Vector expf for x86_64 and tests.

2015-06-17 16:10:51 +03:00

svml_s_expf16_core.S

Vector expf for x86_64 and tests.

2015-06-17 16:10:51 +03:00

svml_s_expf_data.h

Vector expf for x86_64 and tests.

2015-06-17 16:10:51 +03:00

svml_s_expf_data.S

Vector expf for x86_64 and tests.

2015-06-17 16:10:51 +03:00

svml_s_logf4_core.S

Vector logf for x86_64 and tests.

2015-06-17 15:53:00 +03:00

svml_s_logf8_core_avx.S

Vector logf for x86_64 and tests.

2015-06-17 15:53:00 +03:00

svml_s_logf8_core.S

Vector logf for x86_64 and tests.

2015-06-17 15:53:00 +03:00

svml_s_logf16_core.S

Vector logf for x86_64 and tests.

2015-06-17 15:53:00 +03:00

svml_s_logf_data.h

Vector logf for x86_64 and tests.

2015-06-17 15:53:00 +03:00

svml_s_logf_data.S

Vector logf for x86_64 and tests.

2015-06-17 15:53:00 +03:00

svml_s_powf4_core.S

Vector powf for x86_64 and tests.

2015-06-18 17:04:07 +03:00

svml_s_powf8_core_avx.S

Vector powf for x86_64 and tests.

2015-06-18 17:04:07 +03:00

svml_s_powf8_core.S

Vector powf for x86_64 and tests.

2015-06-18 17:04:07 +03:00

svml_s_powf16_core.S

Vector powf for x86_64 and tests.

2015-06-18 17:04:07 +03:00

svml_s_powf_data.h

Vector powf for x86_64 and tests.

2015-06-18 17:04:07 +03:00

svml_s_powf_data.S

Vector powf for x86_64 and tests.

2015-06-18 17:04:07 +03:00

svml_s_sincosf4_core.S

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

svml_s_sincosf8_core_avx.S

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

svml_s_sincosf8_core.S

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

svml_s_sincosf16_core.S

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

svml_s_sinf4_core.S

Vector sinf for x86_64 and tests.

2015-06-15 15:06:53 +03:00

svml_s_sinf8_core_avx.S

Vector sinf for x86_64 and tests.

2015-06-15 15:06:53 +03:00

svml_s_sinf8_core.S

Vector sinf for x86_64 and tests.

2015-06-15 15:06:53 +03:00

svml_s_sinf16_core.S

Vector sinf for x86_64 and tests.

2015-06-15 15:06:53 +03:00

svml_s_trig_data.h

Combination of data tables for x86_64 vector functions sinf, cosf and sincosf.

2015-06-24 17:44:35 +03:00

svml_s_trig_data.S

Combination of data tables for x86_64 vector functions sinf, cosf and sincosf.

2015-06-24 17:44:35 +03:00

svml_s_wrapper_impl.h

Fixed several libmvec bugs found during testing on KNL hardware.

2015-07-24 14:47:23 +03:00

test-double-vlen2-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-double-vlen2.c

Vector sincos for x86_64 and tests.

2015-06-18 17:55:55 +03:00

test-double-vlen4-avx2-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-double-vlen4-avx2.c

Vector sincos for x86_64 and tests.

2015-06-18 17:55:55 +03:00

test-double-vlen4-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-double-vlen4.c

Added runtime check for AVX vector math tests.

2015-07-29 19:47:29 +03:00

test-double-vlen8-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-double-vlen8.c

Vector sincos for x86_64 and tests.

2015-06-18 17:55:55 +03:00

test-float-vlen4-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-float-vlen4.c

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

test-float-vlen8-avx2-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-float-vlen8-avx2.c

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

test-float-vlen8-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-float-vlen8.c

Added runtime check for AVX vector math tests.

2015-07-29 19:47:29 +03:00

test-float-vlen16-wrappers.c

Refactor libm tests.

2015-06-24 23:27:18 +00:00

test-float-vlen16.c

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

Versions

Vector sincosf for x86_64 and tests.

2015-06-18 20:11:27 +03:00

x86_64-math-asm.h

Fix pow missing underflows (bug 18825).

2015-09-25 22:29:10 +00:00