#include <xmmintrin.h>
-static const float p1p1p1m1[4] __attribute__((aligned(16))) =
- { 1.0, 1.0, 1.0, -1.0 };
+static const int p1p1p1m1[4] __attribute__((aligned(16))) =
+ { 0, 0, 0, 1 << 31 };
-static const float p1p1m1p1[4] __attribute__((aligned(16))) =
- { 1.0, 1.0, -1.0, 1.0 };
+static const int p1p1m1p1[4] __attribute__((aligned(16))) =
+ { 0, 0, 1 << 31, 0 };
-static const float p1p1m1m1[4] __attribute__((aligned(16))) =
- { 1.0, 1.0, -1.0, -1.0 };
+static const int p1p1m1m1[4] __attribute__((aligned(16))) =
+ { 0, 0, 1 << 31, 1 << 31 };
#if 0
static void print_v4sf(const char *str, __m128 a)
r = (__m128 *)&z[0];
c1 = *(__m128 *)p1p1m1m1;
- c2 = *(__m128 *)p1p1p1m1;
if (s->inverse)
c2 = *(__m128 *)p1p1m1p1;
else
do {
a = r[0];
b = _mm_shuffle_ps(a, a, _MM_SHUFFLE(1, 0, 3, 2));
- a = _mm_mul_ps(a, c1);
+ a = _mm_xor_ps(a, c1);
/* do the pass 0 butterfly */
a = _mm_add_ps(a, b);
a1 = r[1];
b = _mm_shuffle_ps(a1, a1, _MM_SHUFFLE(1, 0, 3, 2));
- a1 = _mm_mul_ps(a1, c1);
+ a1 = _mm_xor_ps(a1, c1);
/* do the pass 0 butterfly */
b = _mm_add_ps(a1, b);
/* multiply third by -i */
+ /* by toggling the sign bit */
b = _mm_shuffle_ps(b, b, _MM_SHUFFLE(2, 3, 1, 0));
- b = _mm_mul_ps(b, c2);
+ b = _mm_xor_ps(b, c2);
/* do the pass 1 butterfly */
r[0] = _mm_add_ps(a, b);