diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2017-07-19 15:12:58 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2017-07-19 15:12:58 +0200 |
| commit | 1eba0867060b1643d71d4185fbc23995248092bf (patch) | |
| tree | b933cf0474996b72f099f09c134fd321c9590600 /libquadmath/math/expq.c | |
| parent | 564e405c138dc1891ca92462a585bf89444d7dd1 (diff) | |
re PR libquadmath/65757 (gfortran gives incorrect result for anint with real*16 argument)
PR libquadmath/65757
* quadmath-imp.h (math_opt_barrier, math_force_eval,
math_narrow_eval, math_check_force_underflow,
math_check_force_underflow_nonneg): Define.
* math/ceilq.c: Backport changes from upstream glibc
between 2012-11-01 and 2017-07-13.
* math/remquoq.c: Likewise.
* math/expq.c: Likewise.
* math/llroundq.c: Likewise.
* math/logq.c: Likewise.
* math/atanq.c: Likewise.
* math/nearbyintq.c: Likewise.
* math/scalblnq.c: Likewise.
* math/finiteq.c: Likewise.
* math/atanhq.c: Likewise.
* math/expm1q.c: Likewise.
* math/sinhq.c: Likewise.
* math/log10q.c: Likewise.
* math/rintq.c: Likewise.
* math/roundq.c: Likewise.
* math/fmaq.c: Likewise.
* math/erfq.c: Likewise.
* math/log2q.c: Likewise.
* math/lroundq.c: Likewise.
* math/j1q.c: Likewise.
* math/scalbnq.c: Likewise.
* math/truncq.c: Likewise.
* math/frexpq.c: Likewise.
* math/sincosq.c: Likewise.
* math/tanhq.c: Likewise.
* math/asinq.c: Likewise.
* math/coshq.c: Likewise.
* math/j0q.c: Likewise.
* math/asinhq.c: Likewise.
* math/floorq.c: Likewise.
* math/sinq_kernel.c: Likewise.
* math/powq.c: Likewise.
* math/hypotq.c: Likewise.
* math/sincos_table.c: Likewise.
* math/rem_pio2q.c: Likewise.
* math/nextafterq.c: Likewise.
* math/log1pq.c: Likewise.
* math/sincosq_kernel.c: Likewise.
* math/tanq.c: Likewise.
* math/acosq.c: Likewise.
* math/lrintq.c: Likewise.
* math/llrintq.c: Likewise.
From-SVN: r250343
Diffstat (limited to 'libquadmath/math/expq.c')
| -rw-r--r-- | libquadmath/math/expq.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/libquadmath/math/expq.c b/libquadmath/math/expq.c index 70c638d7a08..5df6cd8e192 100644 --- a/libquadmath/math/expq.c +++ b/libquadmath/math/expq.c @@ -1,5 +1,5 @@ /* Quad-precision floating point e^x. - Copyright (C) 1999 Free Software Foundation, Inc. + Copyright (C) 1999-2017 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jj@ultra.linux.cz> Partly based on double-precision code @@ -1075,7 +1075,7 @@ static const __float128 C[] = { #define TWO15 C[11] 32768.0Q, -/* Chebyshev polynom coeficients for (exp(x)-1)/x */ +/* Chebyshev polynom coefficients for (exp(x)-1)/x */ #define P1 C[12] #define P2 C[13] #define P3 C[14] @@ -1142,7 +1142,7 @@ expq (__float128 x) * __expq_table[T_EXPL_RES2 + tval2]; n_i = (int)n; /* 'unsafe' is 1 iff n_1 != 0. */ - unsafe = abs(n_i) >= -FLT128_MIN_EXP - 1; + unsafe = abs(n_i) >= 15000; ex2_u.ieee.exponent += n_i >> unsafe; /* Compute scale = 2^n_1. */ @@ -1179,7 +1179,7 @@ expq (__float128 x) ex3_u.d = (result - ex2_u.d) - x22 * ex2_u.d; ex2_u.d = result; ex3_u.ieee.exponent += LDBL_MANT_DIG + 15 + IEEE854_LONG_DOUBLE_BIAS - - ex2_u.ieee.exponent; + - ex2_u.ieee.exponent; n_i = abs (ex3_u.d); n_i = (n_i + 1) / 2; #ifdef USE_FENV_H @@ -1196,7 +1196,11 @@ expq (__float128 x) if (!unsafe) return result; else - return result * scale_u.value; + { + result *= scale_u.value; + math_check_force_underflow_nonneg (result); + return result; + } } /* Exceptional cases: */ else if (__builtin_isless (x, himark)) |