mirror of git://sourceware.org/git/glibc.git
5011210399
Neither gcc [1] nor clang [2] handles pseudo-normal numbers correctly with the __builtin_fpclassify, so disable its usage for _Float64x and long double types. This only affects x86, so add a new header, fp-builtin-denormal.h, that defines whether the architecture requires disabling the optimization through a new glibc define (__FP_BUILTIN_FPCLASSIFY_DENORMAL). It fixes the regression on test-ldouble-fpclassify and test-float64x-fpclassify when built with clang: Failure: fpclassify (pseudo_zero): Exception "Invalid operation" set Failure: fpclassify (pseudo_inf): Exception "Invalid operation" set Failure: fpclassify (pseudo_qnan): Exception "Invalid operation" set Failure: fpclassify (pseudo_snan): Exception "Invalid operation" set Failure: fpclassify (pseudo_unnormal): Exception "Invalid operation" set Failure: fpclassify_downward (pseudo_zero): Exception "Invalid operation" set Failure: fpclassify_downward (pseudo_inf): Exception "Invalid operation" set Failure: fpclassify_downward (pseudo_qnan): Exception "Invalid operation" set Failure: fpclassify_downward (pseudo_snan): Exception "Invalid operation" set Failure: fpclassify_downward (pseudo_unnormal): Exception "Invalid operation" set Failure: fpclassify_towardzero (pseudo_zero): Exception "Invalid operation" set Failure: fpclassify_towardzero (pseudo_inf): Exception "Invalid operation" set Failure: fpclassify_towardzero (pseudo_qnan): Exception "Invalid operation" set Failure: fpclassify_towardzero (pseudo_snan): Exception "Invalid operation" set Failure: fpclassify_towardzero (pseudo_unnormal): Exception "Invalid operation" set Failure: fpclassify_upward (pseudo_zero): Exception "Invalid operation" set Failure: fpclassify_upward (pseudo_inf): Exception "Invalid operation" set Failure: fpclassify_upward (pseudo_qnan): Exception "Invalid operation" set Failure: fpclassify_upward (pseudo_snan): Exception "Invalid operation" set Failure: fpclassify_upward (pseudo_unnormal): Exception "Invalid operation" set Checked on x86_64-linux-gnu with gcc-15 and clang-18. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123161 [2] https://github.com/llvm/llvm-project/issues/172533 Reviewed-by: H.J. Lu <hjl.tools@gmail.com> |
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| .. | ||
| bits | ||
| fpu | ||
| htl | ||
| include | ||
| nptl | ||
| sys/platform | ||
| Makeconfig | ||
| Makefile | ||
| Versions | ||
| __longjmp_cancel.S | ||
| abi-note.c | ||
| atomic-machine.h | ||
| cacheinfo.c | ||
| cacheinfo.h | ||
| configure | ||
| configure.ac | ||
| cpu-features-offsets.sym | ||
| cpu-features.c | ||
| cpu-tunables.c | ||
| dl-cacheinfo.h | ||
| dl-diagnostics-cpu.c | ||
| dl-get-cpu-features.c | ||
| dl-hwcap.h | ||
| dl-hwcap2.h | ||
| dl-isa-level.h | ||
| dl-lookupcfg.h | ||
| dl-minsigstacksize.h | ||
| dl-new-hash.h | ||
| dl-procinfo.c | ||
| dl-prop.h | ||
| dl-tunables.list | ||
| elf-initfini.h | ||
| features-offsets.sym | ||
| float128-abi.h | ||
| fpu_control.h | ||
| get-cpuid-feature-leaf.c | ||
| get-isa-level.h | ||
| gmp-arch.h | ||
| hp-timing.h | ||
| init-arch.h | ||
| isa-ifunc-macros.h | ||
| isa-level.c | ||
| isa-level.h | ||
| jmp_buf-ssp.sym | ||
| ldbl2mpn.c | ||
| ldsodefs.h | ||
| libc-start.c | ||
| link_map.h | ||
| linkmap.h | ||
| longjmp.c | ||
| readelflib.c | ||
| sysdep.h | ||
| tininess.h | ||
| tst-cpu-features-cpuinfo-static.c | ||
| tst-cpu-features-cpuinfo.c | ||
| tst-cpu-features-supports-static.c | ||
| tst-cpu-features-supports.c | ||
| tst-get-cpu-features-static.c | ||
| tst-get-cpu-features.c | ||
| tst-gnu2-tls2-x86-noxsave.c | ||
| tst-gnu2-tls2-x86-noxsavec.c | ||
| tst-gnu2-tls2-x86-noxsavexsavec.c | ||
| tst-gnu2-tls2.c | ||
| tst-gnu2-tls2.h | ||
| tst-hwcap-tunables.c | ||
| tst-ifunc-isa-1-static.c | ||
| tst-ifunc-isa-1.c | ||
| tst-ifunc-isa-2-static.c | ||
| tst-ifunc-isa-2.c | ||
| tst-ifunc-isa.h | ||
| tst-isa-level-1.c | ||
| tst-isa-level-mod-1-baseline.c | ||
| tst-isa-level-mod-1-v2.c | ||
| tst-isa-level-mod-1-v3.c | ||
| tst-isa-level-mod-1-v4.c | ||
| tst-isa-level-mod-1.c | ||
| tst-ldbl-nonnormal-printf.c | ||
| tst-memchr-rtm.c | ||
| tst-memcmp-rtm.c | ||
| tst-memmove-rtm.c | ||
| tst-memrchr-rtm.c | ||
| tst-memset-rtm.c | ||
| tst-setjmp-cet.c | ||
| tst-stack-align.h | ||
| tst-strcasecmp-rtm.c | ||
| tst-strchr-rtm.c | ||
| tst-strcmp-rtm.c | ||
| tst-strcpy-rtm.c | ||
| tst-string-rtm.h | ||
| tst-strlen-rtm.c | ||
| tst-strncasecmp-rtm.c | ||
| tst-strncmp-rtm.c | ||
| tst-strrchr-rtm.c | ||
| tst-sysconf-cache-linesize-static.c | ||
| tst-sysconf-cache-linesize.c | ||
| tst-tls23.c | ||
| tst-tls23.h | ||
| tst-wcscmp-rtm.c | ||
| tst-wcsncmp-rtm.c | ||
| utmp-size.h | ||