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This patch fixes bug 16390, incorrect signs of zero results from ldbl-128ibm atan2l, soft-float only. The problem is a longstanding GCC bug with fabsl not being correct for signed zero for soft float, and the fix is using -fno-builtin-fabsl as a workaround, as already done for various other source files. Tested powerpc-nofpu. * sysdeps/powerpc/nofpu/Makefile [$(subdir) = math] (CFLAGS-e_atan2l.c): Use -fno-builtin-fabsl.
33 lines
1.2 KiB
Makefile
33 lines
1.2 KiB
Makefile
# Makefile fragment for PowerPC with no FPU.
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ifeq ($(subdir),soft-fp)
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sysdep_routines += $(gcc-single-routines) $(gcc-double-routines) \
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sim-full atomic-feholdexcept atomic-feclearexcept \
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atomic-feupdateenv flt-rounds
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endif
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ifeq ($(subdir),math)
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libm-support += fenv_const
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CPPFLAGS += -I../soft-fp/
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# The follow CFLAGS are a work around for GCC Bugzilla Bug 29253
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# "expand_abs wrong default code for floating point"
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# As this is not a regression, a fix is not likely to go into
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# gcc-4.1.1 and may be too late for gcc-4.2. So we need these flags
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# until the fix in a gcc release and glibc drops support for earlier
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# versions of gcc.
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CFLAGS-e_atan2l.c += -fno-builtin-fabsl
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CFLAGS-e_hypotl.c += -fno-builtin-fabsl
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CFLAGS-e_powl.c += -fno-builtin-fabsl
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CFLAGS-s_ccoshl.c += -fno-builtin-fabsl
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CFLAGS-s_csinhl.c += -fno-builtin-fabsl
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CFLAGS-s_clogl.c += -fno-builtin-fabsl
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CFLAGS-s_clog10l.c += -fno-builtin-fabsl
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CFLAGS-s_csinl.c += -fno-builtin-fabsl
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CFLAGS-s_csqrtl.c += -fno-builtin-fabsl
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CFLAGS-w_acosl.c += -fno-builtin-fabsl
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CFLAGS-w_asinl.c += -fno-builtin-fabsl
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CFLAGS-w_atanhl.c += -fno-builtin-fabsl
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CFLAGS-w_j0l.c += -fno-builtin-fabsl
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CFLAGS-w_j1l.c += -fno-builtin-fabsl
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endif
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