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cell: use simd utilities for pow, exp2, log2

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This commit is contained in:
Brian Paul 2008-10-29 12:12:30 -06:00
parent 4e1c33700d
commit 8b3af5c5d6
1 changed files with 6 additions and 22 deletions
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28
src/gallium/drivers/cell/spu/spu_funcs.c
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@ -38,7 +38,9 @@
#include <math.h>
#include <cos14_v.h>
#include <sin14_v.h>
#include <transpose_matrix4x4.h>
#include <simdmath/exp2f4.h>
#include <simdmath/log2f4.h>
#include <simdmath/powf4.h>
#include "cell/common.h"
#include "spu_main.h"
@ -68,37 +70,19 @@ spu_sin(vector float x)
static vector float
spu_pow(vector float x, vector float y)
{
float z0 = powf(spu_extract(x,0), spu_extract(y,0));
float z1 = powf(spu_extract(x,1), spu_extract(y,1));
float z2 = powf(spu_extract(x,2), spu_extract(y,2));
float z3 = powf(spu_extract(x,3), spu_extract(y,3));
return (vector float) {z0, z1, z2, z3};
return _powf4(x, y);
}
static vector float
spu_exp2(vector float x)
{
float z0 = powf(2.0f, spu_extract(x,0));
float z1 = powf(2.0f, spu_extract(x,1));
float z2 = powf(2.0f, spu_extract(x,2));
float z3 = powf(2.0f, spu_extract(x,3));
return (vector float) {z0, z1, z2, z3};
return _exp2f4(x);
}
static vector float
spu_log2(vector float x)
{
/*
* log_base_2(x) = log(x) / log(2)
* 1.442695 = 1/log(2).
*/
static const vector float k = {1.442695F, 1.442695F, 1.442695F, 1.442695F};
float z0 = logf(spu_extract(x,0));
float z1 = logf(spu_extract(x,1));
float z2 = logf(spu_extract(x,2));
float z3 = logf(spu_extract(x,3));
vector float v = (vector float) {z0, z1, z2, z3};
return spu_mul(v, k);
return _log2f4(x);
}