The x86/amd64 mmintrin.h provides the _mm_empty intrinsic for the 'emms' MMX instruction. Although ARM does not need such an instruction, we should provide an empty _mm_empty function nonetheless for source compatibility.
2012-02-24 Matt Turner <matts...@gmail.com> * config/arm/mmintrin.h (_mm_empty): New. --- gcc/config/arm/mmintrin.h | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/gcc/config/arm/mmintrin.h b/gcc/config/arm/mmintrin.h index 2cc500d..ea73bf1 100644 --- a/gcc/config/arm/mmintrin.h +++ b/gcc/config/arm/mmintrin.h @@ -32,6 +32,12 @@ typedef int __v2si __attribute__ ((vector_size (8))); typedef short __v4hi __attribute__ ((vector_size (8))); typedef char __v8qi __attribute__ ((vector_size (8))); +/* Provided for source compatibility with MMX. */ +extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__)) +_mm_empty (void) +{ +} + /* "Convert" __m64 and __int64 into each other. */ static __inline __m64 _mm_cvtsi64_m64 (__int64 __i) @@ -1248,6 +1254,7 @@ _m_from_int (int __a) #define _m_psadzbw _mm_sadz_pu8 #define _m_psadzwd _mm_sadz_pu16 #define _m_paligniq _mm_align_si64 +#define _m_empty _mm_empty #define _m_cvt_si2pi _mm_cvtsi64_m64 #define _m_cvt_pi2si _mm_cvtm64_si64 -- 1.7.3.4