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This patch fixes __ieee754_logl (-LDBL_MAX) on x86_64 and x86 not to subtract 1 from its argument and so cause spurious overflow in FE_DOWNWARD mode. (For any argument strictly less than -1, it doesn't matter whether or not 1 is subtracted before computing log1p, as long as the result doesn't overflow to -Inf.) Tested x86_64 and x86. (This particular case lacks test coverage, since the testsuite doesn't cover -lieee, but it will be covered by tests after the following patch to test pow in all rounding modes, which was the context in which this bug was found.) [BZ #17022] * sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Do not subtract 1 from arguments -2 or below. * sysdeps/i386/i686/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/x86_64/fpu/e_logl.S (__ieee754_logl): Likewise. |
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| .. | ||
| multiarch | ||
| e_log.S | ||
| e_logf.S | ||
| e_logl.S | ||
| s_fdim.S | ||
| s_fdimf.S | ||
| s_fdiml.S | ||
| s_fmax.S | ||
| s_fmaxf.S | ||
| s_fmaxl.S | ||
| s_fmin.S | ||
| s_fminf.S | ||
| s_fminl.S | ||