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add bench_reverse, draft of a reverse vectorization for AltiVec, make

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global Scaling function static
This commit is contained in:
Gael Guennebaud
2009-02-06 13:28:55 +00:00
parent f5d96df800
commit cc90495e30
3 changed files with 105 additions and 11 deletions
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15
Eigen/src/Core/arch/AltiVec/PacketMath.h
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@@ -111,7 +111,7 @@ template<> inline v4i ei_pmul(const v4i& a, const v4i& b)
USE_CONST_v1i;
USE_CONST_v16i_;
// Get the absolute values
// Get the absolute values
a1 = vec_abs(a);
b1 = vec_abs(b);
@@ -146,7 +146,7 @@ template<> inline v4f ei_pdiv(const v4f& a, const v4f& b) {
// Altivec does not offer a divide instruction, we have to do a reciprocal approximation
y_0 = vec_re(b);
// Do one Newton-Raphson iteration to get the needed accuracy
t = vec_nmsub(y_0, b, v1f);
y_1 = vec_madd(y_0, t, y_0);
@@ -260,6 +260,17 @@ template<> inline int ei_pfirst(const v4i& a)
return ai[0];
}
template<> EIGEN_STRONG_INLINE v4f ei_preverse(const v4f& a)
{
static const unsigned char __attribute__(aligned(16)) reverse_mask = {12,13,14,15, 8,9,10,11, 4,5,6,7, 0,1,2,3};
return (v4f)vec_perm((__vector unsigned char)a,(__vector unsigned char)a,reverse_mask);
}
template<> EIGEN_STRONG_INLINE v4i ei_preverse(const v4i& a)
{
static const unsigned char __attribute__(aligned(16)) reverse_mask = {12,13,14,15, 8,9,10,11, 4,5,6,7, 0,1,2,3};
return (v4i)vec_perm((__vector unsigned char)a,(__vector unsigned char)a,reverse_mask);
}
inline v4f ei_preduxp(const v4f* vecs)
{
v4f v[4], sum[4];