mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
4ba7a00fe3
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. |
||
|---|---|---|
| .. | ||
| fpu | ||
| i486 | ||
| i586 | ||
| i686 | ||
| i786 | ||
| nptl | ||
| sys | ||
| ____longjmp_chk.S | ||
| __longjmp.S | ||
| abort-instr.h | ||
| add_n.S | ||
| addmul_1.S | ||
| asm-syntax.h | ||
| backtrace.c | ||
| bsd-_setjmp.S | ||
| bsd-setjmp.S | ||
| bzero.c | ||
| configure | ||
| configure.ac | ||
| crti.S | ||
| crtn.S | ||
| dl-irel.h | ||
| dl-lookupcfg.h | ||
| dl-machine.h | ||
| dl-procinfo.c | ||
| dl-procinfo.h | ||
| dl-tls.h | ||
| dl-tlsdesc.h | ||
| dl-tlsdesc.S | ||
| dl-trampoline.S | ||
| ffs.c | ||
| gccframe.h | ||
| gmp-mparam.h | ||
| htonl.S | ||
| htons.S | ||
| i386-mcount.S | ||
| Implies | ||
| jmpbuf-offsets.h | ||
| jmpbuf-unwind.h | ||
| ldbl2mpn.c | ||
| ldsodefs.h | ||
| lshift.S | ||
| machine-gmon.h | ||
| Makefile | ||
| memchr.S | ||
| memcmp.S | ||
| memcopy.h | ||
| memset.c | ||
| memusage.h | ||
| mp_clz_tab.c | ||
| mul_1.S | ||
| rawmemchr.S | ||
| rshift.S | ||
| setfpucw.c | ||
| setjmp.S | ||
| stackguard-macros.h | ||
| stackinfo.h | ||
| start.S | ||
| stpcpy.S | ||
| stpncpy.S | ||
| strchr.S | ||
| strchrnul.S | ||
| strcspn.S | ||
| string-inlines.c | ||
| strlen.c | ||
| strpbrk.S | ||
| strrchr.S | ||
| strspn.S | ||
| strtok_r.S | ||
| strtok.S | ||
| sub_n.S | ||
| submul_1.S | ||
| sysdep.h | ||
| tls-macros.h | ||
| tlsdesc.c | ||
| tlsdesc.sym | ||
| tst-audit.h | ||
| tst-stack-align.h | ||
| Versions | ||