[PATCH 1/3] libm: ARM without HW double does not have fast FMA
Keith Packard via Newlib <[email protected]>
| Newsgroups | gmane.comp.lib.newlib |
|---|---|
| Message-ID | <[email protected]> |
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 <[email protected]> --- newlib/libm/common/math_config.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/newlib/libm/common/math_config.h b/newlib/libm/common/math_config.h index 1089b0ec6..df8f8d6e4 100644 --- a/newlib/libm/common/math_config.h +++ b/newlib/libm/common/math_config.h @@ -72,7 +72,7 @@ /* Compiler can inline fma as a single instruction. */ #ifndef HAVE_FAST_FMA -# if __aarch64__ || __ARM_FEATURE_FMA +# if __aarch64__ || (__ARM_FEATURE_FMA && (__ARM_FP & 8)) # define HAVE_FAST_FMA 1 # else # define HAVE_FAST_FMA 0 -- 2.28.0