[PATCH 0/3] ARM with only 32-bit floats do not have fast 64-bit FMA

[Sebastian Huber]

Hello,

with the latest Newlib, I get a linker error in the RTEMS test suite:


undefined reference to `fma'
undefined reference to `fmaf'

The following machine flags are used:

'-march=armv7-a', '-mthumb', '-mfpu=neon', '-mfloat-abi=hard', 
'-mtune=cortex-a9'

It seems to be missing in the corresponding multilib:

nm /build/rtems/6/arm-rtems6/lib/thumb/armv7-a+simd/hard/libm.a | grep fma
lib_a-fmal.o:
          U fma
00000000 T fmal
lib_a-fmaxl.o:
          U fmax
00000000 T fmaxl
lib_a-s_fma.o:
lib_a-s_fmax.o:
00000000 T fmax
lib_a-sf_fma.o:
lib_a-sf_fmax.o:
00000000 T fmaxf