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Fix gen-auto-libm-tests sticky bit setting for negative results.
gen-auto-libm-tests has a bug in the logic for setting a sticky bit based on the ternary value from MPFR: it is correct for positive results, but for negative results mpz_setbit acts as if a two's complement representation is used, whereas the low bit needs setting based on the sign-magnitude representation GMP actually uses. (This showed up in converting fma tests to use auto-libm-test-in / gen-auto-libm-tests.) This patch fixes the problem by negating the mpz_t value to set its low bit. There are lots of changes to auto-libm-test-out (mainly 1ulp fixes to ldbl-128 expected results), but only a few ulps updates are needed on x86 / x86_64. In one case, a corrected expectation showed up a spurious underflow exception where the correct result is slightly outside the underflowing range. Tested x86_64 and x86 and ulps updated accordingly. * math/gen-auto-libm-tests.c (adjust_real): Ensure integers are non-negative before setting low bit. * math/auto-libm-test-in: Mark one asin test possibly having spurious underflow. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
This commit is contained in:
Joseph Myers
parent
ef114eafbf
commit
a4fb786185
10
ChangeLog
10
ChangeLog
@ -1,3 +1,13 @@
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2014-02-18 Joseph Myers <joseph@codesourcery.com>
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* math/gen-auto-libm-tests.c (adjust_real): Ensure integers are
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non-negative before setting low bit.
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* math/auto-libm-test-in: Mark one asin test possibly having
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spurious underflow.
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* math/auto-libm-test-out: Regenerated.
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* sysdeps/i386/fpu/libm-test-ulps: Update.
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* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
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2014-02-17 David Holsgrove <david.holsgrove@xilinx.com>
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* sysdeps/microblaze: Move directory from ports/sysdeps/microblaze.
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@ -61,8 +61,9 @@ asin -0x0.ffffffffffffp0
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asin 0x0.ffffffffffffffffp0
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asin -0x0.ffffffffffffffffp0
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# Bug 16351: underflow exception may be missing.
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# Bug 16599: spurious underflow may occur.
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asin min missing-underflow
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asin -min missing-underflow
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asin -min missing-underflow spurious-underflow:dbl-64:x86
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asin min_subnorm missing-underflow
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asin -min_subnorm missing-underflow
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File diff suppressed because it is too large
Load Diff
@ -987,7 +987,14 @@ adjust_real (mpfr_t r, bool inexact)
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mpz_t tmp;
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mpz_init (tmp);
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mpfr_exp_t e = mpfr_get_z_2exp (tmp, r);
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mpz_setbit (tmp, 0);
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if (mpz_sgn (tmp) < 0)
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{
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mpz_neg (tmp, tmp);
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mpz_setbit (tmp, 0);
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mpz_neg (tmp, tmp);
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}
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else
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mpz_setbit (tmp, 0);
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assert_exact (mpfr_set_z_2exp (r, tmp, e, MPFR_RNDN));
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mpz_clear (tmp);
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}
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@ -53,28 +53,47 @@ ildouble: 1
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ldouble: 1
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# asin_downward
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Test "asin_downward (-0x2p-16384)":
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-1024)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-1076)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-128)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-16384)":
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-152)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-16448)":
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-4)":
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-972)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0xf.fffffff8p-4)":
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ildouble: 1
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ldouble: 1
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@ -136,9 +155,13 @@ Test "asin_upward (-0x2p-16384)":
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ildouble: 1
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ldouble: 1
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Test "asin_upward (-0x4p-1024)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_upward (-0x4p-1076)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_upward (-0x4p-128)":
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@ -3894,6 +3917,9 @@ ifloat: 1
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Test "Imaginary part of: ccos (0x4p-1076 + 0x5.ap+8 i)":
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double: 1
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idouble: 1
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Test "Imaginary part of: ccos (0x4p-16328 + 0x1p-120 i)":
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ildouble: 1
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ldouble: 1
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Test "Real part of: ccos (0xcp-4 + 0x1.4p+0 i)":
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double: 1
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float: 1
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@ -6840,6 +6866,13 @@ float: 1
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ifloat: 1
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ildouble: 2
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ldouble: 2
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Test "Imaginary part of: ctan_downward (-0xc.35p+12 - 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctan_downward (0x1.921fb4p+0 + +0 i)":
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ildouble: 1
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ldouble: 1
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@ -6982,6 +7015,13 @@ ifloat: 1
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Test "Imaginary part of: ctan_downward (0x8p+16380 + 0x1p+0 i)":
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ildouble: 1
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ldouble: 1
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Test "Imaginary part of: ctan_downward (0xc.35p+12 - 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctan_downward (0xcp-4 + 0x1.4p+0 i)":
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double: 1
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idouble: 1
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@ -7701,6 +7741,20 @@ double: 2
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idouble: 2
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctanh_downward (-0xc.35p+12 + 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctanh_downward (-0xc.35p+12 - 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Imaginary part of: ctanh_downward (0x1.63p+8 + 0x1p+0 i)":
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ildouble: 1
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ldouble: 1
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@ -123,11 +123,49 @@ double: 1
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Test "asin_downward (-0x1p+0)":
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double: 1
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idouble: 1
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Test "asin_downward (-0x2p-16384)":
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-1024)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-1076)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-128)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x4p-16384)":
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-152)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-16448)":
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-4)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0x8p-972)":
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double: 1
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idouble: 1
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ildouble: 1
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ldouble: 1
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Test "asin_downward (-0xf.fffffff8p-4)":
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double: 1
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idouble: 1
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@ -5127,6 +5165,9 @@ ldouble: 1
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Test "Imaginary part of: ccos (0x4p-1076 + 0x5.ap+8 i)":
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double: 1
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idouble: 1
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Test "Imaginary part of: ccos (0x4p-16328 + 0x1p-120 i)":
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ildouble: 1
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ldouble: 1
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Test "Real part of: ccos (0xcp-4 + 0x1.4p+0 i)":
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double: 1
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float: 1
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@ -8485,6 +8526,13 @@ double: 2
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idouble: 2
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ildouble: 2
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ldouble: 2
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Test "Imaginary part of: ctan_downward (-0xc.35p+12 - 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctan_downward (0x1.921fb4p+0 + +0 i)":
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float: 1
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ifloat: 1
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@ -8631,6 +8679,13 @@ ifloat: 1
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Test "Imaginary part of: ctan_downward (0x8p+16380 + 0x1p+0 i)":
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ildouble: 1
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ldouble: 1
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Test "Imaginary part of: ctan_downward (0xc.35p+12 - 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctan_downward (0xcp-4 + 0x1.4p+0 i)":
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float: 1
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ifloat: 1
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@ -9479,6 +9534,20 @@ idouble: 1
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ifloat: 3
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctanh_downward (-0xc.35p+12 + 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Real part of: ctanh_downward (-0xc.35p+12 - 0xc.35p+12 i)":
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double: 1
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float: 1
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idouble: 1
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ifloat: 1
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ildouble: 1
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ldouble: 1
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Test "Imaginary part of: ctanh_downward (0x1.63p+8 + 0x1p+0 i)":
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ildouble: 1
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ldouble: 1
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