diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | math/auto-libm-test-in | 1 | ||||
| -rw-r--r-- | math/auto-libm-test-out-pow | 25 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_powf.c | 4 |
4 files changed, 37 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog index 4d667ad759..037552dac4 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,12 @@ +2017-02-07 Joseph Myers <joseph@codesourcery.com> + + [BZ #21112] + * sysdeps/ieee754/flt-32/e_powf.c (cp_h): Use value with trailing + 12 bits zero. + (cp_l): Update for new value of cp_h. + * math/auto-libm-test-in: Add another test of pow. + * math/auto-libm-test-out-pow: Regenerated. + 2017-02-07 Siddhesh Poyarekar <siddhesh@sourceware.org> * manual/contrib.texi: Fix typo. diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in index 52272e8579..58236efd66 100644 --- a/math/auto-libm-test-in +++ b/math/auto-libm-test-in @@ -3749,6 +3749,7 @@ pow 0xf.fffffp+124 -0x5.b5b648p+0 pow 0x1.430d4cp+0 0x5.0e462p+4 pow 0x9.8b82ap-4 -0x1.99907ap+12 pow 0xd.73035p-4 -0x1.47bb8p+8 +pow 0x1.059c76p+0 0x1.ff80bep+11 sin 0 sin -0 diff --git a/math/auto-libm-test-out-pow b/math/auto-libm-test-out-pow index d2c662eec2..4a9f1fc66a 100644 --- a/math/auto-libm-test-out-pow +++ b/math/auto-libm-test-out-pow @@ -44146,3 +44146,28 @@ pow 0xd.73035p-4 -0x1.47bb8p+8 = pow tonearest ibm128 0xd.73035p-4 -0x1.47bb8p+8 : 0x4.523987c590d3192757b32fb92cp+80 : inexact-ok = pow towardzero ibm128 0xd.73035p-4 -0x1.47bb8p+8 : 0x4.523987c590d3192757b32fb92cp+80 : inexact-ok = pow upward ibm128 0xd.73035p-4 -0x1.47bb8p+8 : 0x4.523987c590d3192757b32fb92ep+80 : inexact-ok +pow 0x1.059c76p+0 0x1.ff80bep+11 += pow downward binary32 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe55p+124 : inexact-ok += pow tonearest binary32 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe55p+124 : inexact-ok += pow towardzero binary32 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe55p+124 : inexact-ok += pow upward binary32 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe56p+124 : inexact-ok += pow downward binary64 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f98p+124 : inexact-ok += pow tonearest binary64 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f98p+124 : inexact-ok += pow towardzero binary64 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f98p+124 : inexact-ok += pow upward binary64 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38fap+124 : inexact-ok += pow downward intel96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be6p+124 : inexact-ok += pow tonearest intel96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be6p+124 : inexact-ok += pow towardzero intel96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be6p+124 : inexact-ok += pow upward intel96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be7p+124 : inexact-ok += pow downward m68k96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be6p+124 : inexact-ok += pow tonearest m68k96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be6p+124 : inexact-ok += pow towardzero m68k96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be6p+124 : inexact-ok += pow upward m68k96 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be7p+124 : inexact-ok += pow downward binary128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d56p+124 : inexact-ok += pow tonearest binary128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d568p+124 : inexact-ok += pow towardzero binary128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d56p+124 : inexact-ok += pow upward binary128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d568p+124 : inexact-ok += pow downward ibm128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d4p+124 : inexact-ok += pow tonearest ibm128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d4p+124 : inexact-ok += pow towardzero ibm128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d4p+124 : inexact-ok += pow upward ibm128 0x1.059c76p+0 0xf.fc05fp+8 : 0xf.ffe5535a38f9be648255c105d8p+124 : inexact-ok diff --git a/sysdeps/ieee754/flt-32/e_powf.c b/sysdeps/ieee754/flt-32/e_powf.c index d9470f190d..13b49def8e 100644 --- a/sysdeps/ieee754/flt-32/e_powf.c +++ b/sysdeps/ieee754/flt-32/e_powf.c @@ -43,8 +43,8 @@ lg2_h = 6.93145752e-01, /* 0x3f317200 */ lg2_l = 1.42860654e-06, /* 0x35bfbe8c */ ovt = 4.2995665694e-08, /* -(128-log2(ovfl+.5ulp)) */ cp = 9.6179670095e-01, /* 0x3f76384f =2/(3ln2) */ -cp_h = 9.6179199219e-01, /* 0x3f763800 =head of cp */ -cp_l = 4.7017383622e-06, /* 0x369dc3a0 =tail of cp_h */ +cp_h = 0xf.64p-4, /* cp high 12 bits. */ +cp_l = -0x7.b11e3p-16, /* 2/(3ln2) - cp_h. */ ivln2 = 1.4426950216e+00, /* 0x3fb8aa3b =1/ln2 */ ivln2_h = 1.4426879883e+00, /* 0x3fb8aa00 =16b 1/ln2*/ ivln2_l = 7.0526075433e-06; /* 0x36eca570 =1/ln2 tail*/ |