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Improve efficiency of operator*(fquatSIMD, fquatSIMD) in SSE4 mode.

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Now only requires 3 shuffle, 4 mul and 4 dpps.
This commit is contained in:
Dave Reid 2013-04-24 07:58:41 +10:00
parent d23da666c5
commit 197b6c96d8
1 changed files with 29 additions and 28 deletions
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17
glm/gtx/simd_quat.inl
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@ -122,7 +122,7 @@ GLM_FUNC_QUALIFIER fquatSIMD operator* (fquatSIMD const & q1, fquatSIMD const &
// SSE4 STATS:
// 3 shuffle
// 8 mul
// 4 mul
// 4 dpps
__m128 mul0 = _mm_mul_ps(q1.Data, q2.Data);
@ -130,18 +130,18 @@ GLM_FUNC_QUALIFIER fquatSIMD operator* (fquatSIMD const & q1, fquatSIMD const &
__m128 mul2 = _mm_mul_ps(q1.Data, _mm_shuffle_ps(q2.Data, q2.Data, _MM_SHUFFLE(1, 0, 3, 2)));
__m128 mul3 = _mm_mul_ps(q1.Data, _mm_shuffle_ps(q2.Data, q2.Data, _MM_SHUFFLE(2, 3, 0, 1)));
# if((GLM_ARCH & GLM_ARCH_SSE4))
__m128 add0 = _mm_dp_ps(mul0, _mm_set_ps(1.0f, -1.0f, -1.0f, -1.0f), 0xff);
__m128 add1 = _mm_dp_ps(mul1, _mm_set_ps(1.0f, -1.0f, 1.0f, 1.0f), 0xff);
__m128 add2 = _mm_dp_ps(mul2, _mm_set_ps(1.0f, 1.0f, 1.0f, -1.0f), 0xff);
__m128 add3 = _mm_dp_ps(mul3, _mm_set_ps(1.0f, 1.0f, -1.0f, 1.0f), 0xff);
# else
mul0 = _mm_mul_ps(mul0, _mm_set_ps(1.0f, -1.0f, -1.0f, -1.0f));
mul1 = _mm_mul_ps(mul1, _mm_set_ps(1.0f, -1.0f, 1.0f, 1.0f));
mul2 = _mm_mul_ps(mul2, _mm_set_ps(1.0f, 1.0f, 1.0f, -1.0f));
mul3 = _mm_mul_ps(mul3, _mm_set_ps(1.0f, 1.0f, -1.0f, 1.0f));
# if((GLM_ARCH & GLM_ARCH_SSE4))
__m128 add0 = _mm_dp_ps(mul0, _mm_set1_ps(1.0f), 0xff);
__m128 add1 = _mm_dp_ps(mul1, _mm_set1_ps(1.0f), 0xff);
__m128 add2 = _mm_dp_ps(mul2, _mm_set1_ps(1.0f), 0xff);
__m128 add3 = _mm_dp_ps(mul3, _mm_set1_ps(1.0f), 0xff);
# elif((GLM_ARCH & GLM_ARCH_SSE3))
# if((GLM_ARCH & GLM_ARCH_SSE3))
__m128 add0 = _mm_hadd_ps(mul0, mul0);
add0 = _mm_hadd_ps(add0, add0);
__m128 add1 = _mm_hadd_ps(mul1, mul1);
@ -159,6 +159,7 @@ GLM_FUNC_QUALIFIER fquatSIMD operator* (fquatSIMD const & q1, fquatSIMD const &
add2 = _mm_add_ss(add2, _mm_shuffle_ps(add2, add2, 1));
__m128 add3 = _mm_add_ps(mul3, _mm_movehl_ps(mul3, mul3));
add3 = _mm_add_ss(add3, _mm_shuffle_ps(add3, add3, 1));
# endif
#endif