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libm: ARM without HW double does not have fast FMA 

32-bit ARM processors with HW float (but not HW double) may define
__ARM_FEATURE_FMA, but that only means they have fast FMA for 32-bit
floats.

Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Keith Packard via Newlib 2020-08-08 15:34:11 -07:00 committed by Corinna Vinschen
parent 73b02710ec
commit 432b331c79
1 changed files with 1 additions and 1 deletions
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2
newlib/libm/common/math_config.h
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@ -72,7 +72,7 @@
/* Compiler can inline fma as a single instruction. */ /* Compiler can inline fma as a single instruction. */
#ifndef HAVE_FAST_FMA #ifndef HAVE_FAST_FMA
# if __aarch64__ || __ARM_FEATURE_FMA # if __aarch64__ || (__ARM_FEATURE_FMA && (__ARM_FP & 8))
# define HAVE_FAST_FMA 1 # define HAVE_FAST_FMA 1
# else # else
# define HAVE_FAST_FMA 0 # define HAVE_FAST_FMA 0