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for some reason passing the argument by const reference killed the perf

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(in the packet version of sin, cos, exp, lop), so let's pass them by
value. Also, improve the perf of ei_plog by reducing dependencies.
This commit is contained in:
Gael Guennebaud
2009-03-25 18:33:36 +00:00
parent 17860e578c
commit a22ef7e1f3
2 changed files with 38 additions and 30 deletions
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51
Eigen/src/Core/arch/SSE/TranscendentalFunctions.h
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@@ -84,9 +84,8 @@ _EIGEN_DECLARE_CONST_Packet4f(cephes_log_p8, + 3.3333331174E-1);
_EIGEN_DECLARE_CONST_Packet4f(cephes_log_q1, -2.12194440e-4);
_EIGEN_DECLARE_CONST_Packet4f(cephes_log_q2, 0.693359375);
template<> EIGEN_DONT_INLINE Packet4f ei_plog(const Packet4f& _x)
template<> EIGEN_DONT_INLINE Packet4f ei_plog(Packet4f x)
{
Packet4f x = _x;
Packet4i emm0;
Packet4f invalid_mask = _mm_cmple_ps(x, _mm_setzero_ps());
@@ -113,26 +112,27 @@ template<> EIGEN_DONT_INLINE Packet4f ei_plog(const Packet4f& _x)
e = ei_psub(e, _mm_and_ps(ei_p4f_1, mask));
x = ei_padd(x, tmp);
Packet4f z = ei_pmul(x,x);
Packet4f y = ei_p4f_cephes_log_p0;
y = ei_pmadd(y, x, ei_p4f_cephes_log_p1);
y = ei_pmadd(y, x, ei_p4f_cephes_log_p2);
y = ei_pmadd(y, x, ei_p4f_cephes_log_p3);
y = ei_pmadd(y, x, ei_p4f_cephes_log_p4);
y = ei_pmadd(y, x, ei_p4f_cephes_log_p5);
y = ei_pmadd(y, x, ei_p4f_cephes_log_p6);
y = ei_pmadd(y, x, ei_p4f_cephes_log_p7);
y = ei_pmadd(y, x, ei_p4f_cephes_log_p8);
y = ei_pmul(y, x);
y = ei_pmul(y, z);
Packet4f x2 = ei_pmul(x,x);
Packet4f x3 = ei_pmul(x2,x);
y = ei_pmadd(e, ei_p4f_cephes_log_q1, y);
y = ei_psub(y, ei_pmul(z, ei_p4f_half));
tmp = ei_pmul(e, ei_p4f_cephes_log_q2);
Packet4f y, y1, y2;
y = ei_pmadd(ei_p4f_cephes_log_p0, x, ei_p4f_cephes_log_p1);
y1 = ei_pmadd(ei_p4f_cephes_log_p3, x, ei_p4f_cephes_log_p4);
y2 = ei_pmadd(ei_p4f_cephes_log_p6, x, ei_p4f_cephes_log_p7);
y = ei_pmadd(y , x, ei_p4f_cephes_log_p2);
y1 = ei_pmadd(y1, x, ei_p4f_cephes_log_p5);
y2 = ei_pmadd(y2, x, ei_p4f_cephes_log_p8);
y = ei_pmadd(y, x3, y1);
y = ei_pmadd(y, x3, y2);
y = ei_pmul(y, x3);
y1 = ei_pmul(e, ei_p4f_cephes_log_q1);
tmp = ei_pmul(x2, ei_p4f_half);
y = ei_padd(y, y1);
x = ei_psub(x, tmp);
y2 = ei_pmul(e, ei_p4f_cephes_log_q2);
x = ei_padd(x, y);
x = ei_padd(x, tmp);
x = ei_padd(x, y2);
return _mm_or_ps(x, invalid_mask); // negative arg will be NAN
}
@@ -150,9 +150,8 @@ _EIGEN_DECLARE_CONST_Packet4f(cephes_exp_p3, 4.1665795894E-2);
_EIGEN_DECLARE_CONST_Packet4f(cephes_exp_p4, 1.6666665459E-1);
_EIGEN_DECLARE_CONST_Packet4f(cephes_exp_p5, 5.0000001201E-1);
template<> EIGEN_DONT_INLINE Packet4f ei_pexp(const Packet4f& _x)
template<> EIGEN_DONT_INLINE Packet4f ei_pexp(Packet4f x)
{
Packet4f x = _x;
Packet4f tmp = _mm_setzero_ps(), fx;
Packet4i emm0;
@@ -215,16 +214,17 @@ _EIGEN_DECLARE_CONST_Packet4f(coscof_p0, 2.443315711809948E-005);
_EIGEN_DECLARE_CONST_Packet4f(coscof_p1, -1.388731625493765E-003);
_EIGEN_DECLARE_CONST_Packet4f(coscof_p2, 4.166664568298827E-002);
_EIGEN_DECLARE_CONST_Packet4f(cephes_FOPI, 1.27323954473516); // 4 / M_PI
_EIGEN_DECLARE_CONST_Packet4f(2pi, 2.*M_PI);
template<> EIGEN_DONT_INLINE Packet4f ei_psin(const Packet4f& _x)
template<> EIGEN_DONT_INLINE Packet4f ei_psin(Packet4f x)
{
Packet4f x = _x;
Packet4f xmm1, xmm2 = _mm_setzero_ps(), xmm3, sign_bit, y;
Packet4i emm0, emm2;
sign_bit = x;
/* take the absolute value */
x = ei_pabs(x);
/* extract the sign bit (upper one) */
sign_bit = _mm_and_ps(sign_bit, ei_p4f_sign_mask);
@@ -292,9 +292,8 @@ template<> EIGEN_DONT_INLINE Packet4f ei_psin(const Packet4f& _x)
}
/* almost the same as ei_psin */
template<> EIGEN_DONT_INLINE Packet4f ei_pcos(const Packet4f& _x)
template<> Packet4f ei_pcos(Packet4f x)
{
Packet4f x = _x;
Packet4f xmm1, xmm2 = _mm_setzero_ps(), xmm3, y;
Packet4i emm0, emm2;