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authorSzabolcs Nagy <nsz@port70.net>2018-09-22 18:47:27 +0000
committerRich Felker <dalias@aerifal.cx>2018-10-15 14:42:46 -0400
commit7396ef0a05b834bf92c4f268a3336c0bc10c3593 (patch)
tree185691544913e852ac64c13ba8d0a9f7cfe9530f /src/complex/clogf.c
parent7c5f3bb955123ba65bbdedee0e4499ef78a5747c (diff)
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arm: add single instruction fma
vfma is available in the vfpv4 fpu and above, the ACLE standard feature
test for double precision hardware fma support is
  __ARM_FEATURE_FMA && __ARM_FP&8
we need further checks to work around clang bugs (fixed in clang >=7.0)
  && !__SOFTFP__
because __ARM_FP is defined even with -mfloat-abi=soft
  && !BROKEN_VFP_ASM
to disable the single precision code when inline asm handling is broken.

For runtime selection the HWCAP_ARM_VFPv4 hwcap flag can be used, but
that requires further work.
Diffstat (limited to 'src/complex/clogf.c')
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