| /* { dg-do compile } */ |
| /* { dg-options "-O3 -msse" } */ |
| |
| #include <xmmintrin.h> |
| static const __m128 v_sign = {-.0f, -.0f, -.0f, -.0f}; |
| static const __m128 v_half = {0.5f, 0.5f, 0.5f, 0.5f}; |
| static const __m128 v_one = {1.0f, 1.0f, 1.0f, 1.0f}; |
| static inline __m128 insn_ABS (__m128 a) |
| { |
| return _mm_andnot_ps (v_sign, a); |
| } |
| __m128 voodoo (__m128 a) |
| { |
| __m128 x = insn_ABS (a), y = _mm_rsqrt_ps (x); |
| y = _mm_add_ps (_mm_mul_ps (_mm_sub_ps (_mm_setzero_ps(), _mm_sub_ps (_mm_mul_ps (x, _mm_add_ps (_mm_mul_ps (y, y), _mm_setzero_ps())), v_one)), _mm_add_ps (_mm_mul_ps (y, v_half), _mm_setzero_ps())), y); |
| return y; |
| } |
