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It is enabled through math-use-builtins-fma.h if glibc is built for VPFv4 (__ARM_FEATURE_FMA predefined by GCC), or through IFUNC (testing HWCAP_ARM_VFPv4) otherwise. Checked on arm-linux-gnueabihf. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
12 lines
283 B
C
12 lines
283 B
C
#if defined __ARM_FEATURE_FMA && __ARM_FP & 0x4
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# define USE_FMA_BUILTIN 1
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#endif
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#if defined __ARM_FEATURE_FMA && __ARM_FP & 0x2
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# define USE_FMAF_BUILTIN 1
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#else
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# define USE_FMA_BUILTIN 0
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# define USE_FMAF_BUILTIN 0
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#endif
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#define USE_FMAL_BUILTIN 0
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#define USE_FMAF128_BUILTIN 0
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