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transform-altivec.c
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transform-altivec.c
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/* vim: set ts=8 sw=8 noexpandtab: */
// qcms
// Copyright (C) 2009 Mozilla Corporation
// Copyright (C) 1998-2007 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include <altivec.h>
#include "qcmsint.h"
#define FLOATSCALE (float)(PRECACHE_OUTPUT_SIZE)
#define CLAMPMAXVAL (((float) (PRECACHE_OUTPUT_SIZE - 1)) / PRECACHE_OUTPUT_SIZE)
static const ALIGN float floatScaleX4 = FLOATSCALE;
static const ALIGN float clampMaxValueX4 = CLAMPMAXVAL;
inline vector float load_aligned_float(float *dataPtr)
{
vector float data = vec_lde(0, dataPtr);
vector unsigned char moveToStart = vec_lvsl(0, dataPtr);
return vec_perm(data, data, moveToStart);
}
void qcms_transform_data_rgb_out_lut_altivec(qcms_transform *transform,
unsigned char *src,
unsigned char *dest,
size_t length)
{
unsigned int i;
float (*mat)[4] = transform->matrix;
char input_back[32];
/* Ensure we have a buffer that's 16 byte aligned regardless of the original
* stack alignment. We can't use __attribute__((aligned(16))) or __declspec(align(32))
* because they don't work on stack variables. gcc 4.4 does do the right thing
* on x86 but that's too new for us right now. For more info: gcc bug #16660 */
float const *input = (float*)(((uintptr_t)&input_back[16]) & ~0xf);
/* share input and output locations to save having to keep the
* locations in separate registers */
uint32_t const *output = (uint32_t*)input;
/* deref *transform now to avoid it in loop */
const float *igtbl_r = transform->input_gamma_table_r;
const float *igtbl_g = transform->input_gamma_table_g;
const float *igtbl_b = transform->input_gamma_table_b;
/* deref *transform now to avoid it in loop */
const uint8_t *otdata_r = &transform->output_table_r->data[0];
const uint8_t *otdata_g = &transform->output_table_g->data[0];
const uint8_t *otdata_b = &transform->output_table_b->data[0];
/* input matrix values never change */
const vector float mat0 = vec_ldl(0, (vector float*)mat[0]);
const vector float mat1 = vec_ldl(0, (vector float*)mat[1]);
const vector float mat2 = vec_ldl(0, (vector float*)mat[2]);
/* these values don't change, either */
const vector float max = vec_splat(vec_lde(0, (float*)&clampMaxValueX4), 0);
const vector float min = (vector float)vec_splat_u32(0);
const vector float scale = vec_splat(vec_lde(0, (float*)&floatScaleX4), 0);
/* working variables */
vector float vec_r, vec_g, vec_b, result;
/* CYA */
if (!length)
return;
/* one pixel is handled outside of the loop */
length--;
/* setup for transforming 1st pixel */
vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
src += 3;
/* transform all but final pixel */
for (i=0; i<length; i++)
{
/* position values from gamma tables */
vec_r = vec_splat(vec_r, 0);
vec_g = vec_splat(vec_g, 0);
vec_b = vec_splat(vec_b, 0);
/* gamma * matrix */
vec_r = vec_madd(vec_r, mat0, min);
vec_g = vec_madd(vec_g, mat1, min);
vec_b = vec_madd(vec_b, mat2, min);
/* crunch, crunch, crunch */
vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
vec_r = vec_max(min, vec_r);
vec_r = vec_min(max, vec_r);
result = vec_madd(vec_r, scale, min);
/* store calc'd output tables indices */
vec_st(vec_ctu(vec_round(result), 0), 0, (vector unsigned int*)output);
/* load for next loop while store completes */
vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
src += 3;
/* use calc'd indices to output RGB values */
dest[0] = otdata_r[output[0]];
dest[1] = otdata_g[output[1]];
dest[2] = otdata_b[output[2]];
dest += 3;
}
/* handle final (maybe only) pixel */
vec_r = vec_splat(vec_r, 0);
vec_g = vec_splat(vec_g, 0);
vec_b = vec_splat(vec_b, 0);
vec_r = vec_madd(vec_r, mat0, min);
vec_g = vec_madd(vec_g, mat1, min);
vec_b = vec_madd(vec_b, mat2, min);
vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
vec_r = vec_max(min, vec_r);
vec_r = vec_min(max, vec_r);
result = vec_madd(vec_r, scale, min);
vec_st(vec_ctu(vec_round(result),0),0,(vector unsigned int*)output);
dest[0] = otdata_r[output[0]];
dest[1] = otdata_g[output[1]];
dest[2] = otdata_b[output[2]];
}
void qcms_transform_data_rgba_out_lut_altivec(qcms_transform *transform,
unsigned char *src,
unsigned char *dest,
size_t length)
{
unsigned int i;
float (*mat)[4] = transform->matrix;
char input_back[32];
/* Ensure we have a buffer that's 16 byte aligned regardless of the original
* stack alignment. We can't use __attribute__((aligned(16))) or __declspec(align(32))
* because they don't work on stack variables. gcc 4.4 does do the right thing
* on x86 but that's too new for us right now. For more info: gcc bug #16660 */
float const *input = (float*)(((uintptr_t)&input_back[16]) & ~0xf);
/* share input and output locations to save having to keep the
* locations in separate registers */
uint32_t const *output = (uint32_t*)input;
/* deref *transform now to avoid it in loop */
const float *igtbl_r = transform->input_gamma_table_r;
const float *igtbl_g = transform->input_gamma_table_g;
const float *igtbl_b = transform->input_gamma_table_b;
/* deref *transform now to avoid it in loop */
const uint8_t *otdata_r = &transform->output_table_r->data[0];
const uint8_t *otdata_g = &transform->output_table_g->data[0];
const uint8_t *otdata_b = &transform->output_table_b->data[0];
/* input matrix values never change */
const vector float mat0 = vec_ldl(0, (vector float*)mat[0]);
const vector float mat1 = vec_ldl(0, (vector float*)mat[1]);
const vector float mat2 = vec_ldl(0, (vector float*)mat[2]);
/* these values don't change, either */
const vector float max = vec_splat(vec_lde(0, (float*)&clampMaxValueX4), 0);
const vector float min = (vector float)vec_splat_u32(0);
const vector float scale = vec_splat(vec_lde(0, (float*)&floatScaleX4), 0);
/* working variables */
vector float vec_r, vec_g, vec_b, result;
unsigned char alpha;
/* CYA */
if (!length)
return;
/* one pixel is handled outside of the loop */
length--;
/* setup for transforming 1st pixel */
vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
alpha = src[3];
src += 4;
/* transform all but final pixel */
for (i=0; i<length; i++)
{
/* position values from gamma tables */
vec_r = vec_splat(vec_r, 0);
vec_g = vec_splat(vec_g, 0);
vec_b = vec_splat(vec_b, 0);
/* gamma * matrix */
vec_r = vec_madd(vec_r, mat0, min);
vec_g = vec_madd(vec_g, mat1, min);
vec_b = vec_madd(vec_b, mat2, min);
/* store alpha for this pixel; load alpha for next */
dest[3] = alpha;
alpha = src[3];
/* crunch, crunch, crunch */
vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
vec_r = vec_max(min, vec_r);
vec_r = vec_min(max, vec_r);
result = vec_madd(vec_r, scale, min);
/* store calc'd output tables indices */
vec_st(vec_ctu(vec_round(result), 0), 0, (vector unsigned int*)output);
/* load gamma values for next loop while store completes */
vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
src += 4;
/* use calc'd indices to output RGB values */
dest[0] = otdata_r[output[0]];
dest[1] = otdata_g[output[1]];
dest[2] = otdata_b[output[2]];
dest += 4;
}
/* handle final (maybe only) pixel */
vec_r = vec_splat(vec_r, 0);
vec_g = vec_splat(vec_g, 0);
vec_b = vec_splat(vec_b, 0);
vec_r = vec_madd(vec_r, mat0, min);
vec_g = vec_madd(vec_g, mat1, min);
vec_b = vec_madd(vec_b, mat2, min);
dest[3] = alpha;
vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
vec_r = vec_max(min, vec_r);
vec_r = vec_min(max, vec_r);
result = vec_madd(vec_r, scale, min);
vec_st(vec_ctu(vec_round(result), 0), 0, (vector unsigned int*)output);
dest[0] = otdata_r[output[0]];
dest[1] = otdata_g[output[1]];
dest[2] = otdata_b[output[2]];
}