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gimp/app/composite/gimp-composite-altivec.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 2005 Frederic Leroy <fredo@starox.org>
*
* -*- mode: c tab-width: 2; -*-
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdio.h>
#include <glib-object.h>
#include "base/base-types.h"
#include "gimp-composite.h"
#include "gimp-composite-altivec.h"
#ifdef COMPILE_ALTIVEC_IS_OKAY
#ifdef HAVE_ALTIVEC_H
#include <altivec.h>
#endif
/* Paper over differences between official gcc and Apple's weird gcc */
#ifdef HAVE_ALTIVEC_H
#define INIT_VECTOR(v...) {v}
#define CONST_BUFFER(b) (b)
#else
#define INIT_VECTOR(v...) (v)
#define CONST_BUFFER(b) ((guchar *)(b))
#endif
static const vector unsigned char alphamask = (const vector unsigned char)
INIT_VECTOR(0,0,0,0xff,0,0,0,0xff,0,0,0,0xff,0,0,0,0xff);
static const vector unsigned char combine_high_bytes = (const vector unsigned char)
INIT_VECTOR(0,16,2,18,4,20,6,22,8,24,10,26,12,28,14,30);
static const vector unsigned short ox0080 = (const vector unsigned short)
INIT_VECTOR(0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80);
static const vector unsigned short ox0008 = (const vector unsigned short)
INIT_VECTOR(0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8);
static const vector signed short ox00ff = (const vector signed short)
INIT_VECTOR(0x00ff,0x00ff,0x00ff,0x00ff,0x00ff,0x00ff,0x00ff,0x00ff);
static const vector signed short oxff80 = (const vector signed short)
INIT_VECTOR(0xff80,0xff80,0xff80,0xff80,0xff80,0xff80,0xff80,0xff80);
/* Load a vector from an unaligned location in memory */
static inline vector unsigned char
LoadUnaligned(const guchar *v)
{
if ((long)v & 0x0f)
{
vector unsigned char permuteVector = vec_lvsl(0, v);
vector unsigned char low = vec_ld(0, v);
vector unsigned char high = vec_ld(16, v);
return vec_perm(low, high, permuteVector);
}
else
return vec_ld(0, v); /* don't want overflow */
}
/* Load less than a vector from an unaligned location in memory */
static inline vector unsigned char
LoadUnalignedLess(const guchar *v,
int n)
{
vector unsigned char permuteVector = vec_lvsl(0, v);
if (((long)v&0x0f)+n > 15)
{
vector unsigned char low = vec_ld(0, v);
vector unsigned char high = vec_ld(16, v);
return vec_perm(low, high, permuteVector);
}
else
{
vector unsigned char tmp = vec_ld(0, v);
return vec_perm(tmp, tmp, permuteVector); /* don't want overflow */
}
}
/* Store a vector to an unaligned location in memory */
static inline void
StoreUnaligned (vector unsigned char v,
const guchar *where)
{
if ((unsigned long)where & 0x0f)
{
/* Load the surrounding area */
vector unsigned char low = vec_ld(0, where);
vector unsigned char high = vec_ld(16, where);
/* Prepare the constants that we need */
vector unsigned char permuteVector = vec_lvsr(0, where);
vector signed char oxFF = vec_splat_s8(-1);
vector signed char ox00 = vec_splat_s8(0);
/* Make a mask for which parts of the vectors to swap out */
vector unsigned char mask = (vector unsigned char)vec_perm(ox00, oxFF, permuteVector);
v = vec_perm(v, v, permuteVector);
/* Insert our data into the low and high vectors */
low = vec_sel(low, v, mask);
high = vec_sel(v, high, mask);
/* Store the two aligned result vectors */
vec_st(low, 0, CONST_BUFFER(where));
vec_st(high, 16, CONST_BUFFER(where));
}
else
{ /* prevent overflow */
vec_st(v, 0, CONST_BUFFER(where));
}
}
/* Store less than a vector to an unaligned location in memory */
static inline void
StoreUnalignedLess (vector unsigned char v,
const guchar *where,
int n)
{
int i;
vector unsigned char permuteVector = vec_lvsr(0, where);
v = vec_perm(v, v, permuteVector);
for (i=0; i<n; i++)
vec_ste(v, i, CONST_BUFFER(where));
}
void
gimp_composite_addition_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,alpha_a,alpha_b;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
d=vec_min(alpha_a, alpha_b);
a=vec_andc(a, alphamask);
a=vec_adds(a, d);
b=vec_andc(b, alphamask);
d=vec_adds(a, b);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a,alphamask);
alpha_b=vec_and(b,alphamask);
d=vec_min(alpha_a,alpha_b);
a=vec_andc(a,alphamask);
a=vec_adds(a,d);
b=vec_andc(b,alphamask);
d=vec_adds(a,b);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_subtract_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,alpha_a,alpha_b;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
d=vec_min(alpha_a, alpha_b);
a=vec_andc(a, alphamask);
a=vec_adds(a, d);
b=vec_andc(b, alphamask);
d=vec_subs(a, b);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a,alphamask);
alpha_b=vec_and(b,alphamask);
d=vec_min(alpha_a,alpha_b);
a=vec_andc(a,alphamask);
a=vec_adds(a,d);
b=vec_andc(b,alphamask);
d=vec_subs(a,b);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_swap_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guint length = ctx->n_pixels;
vector unsigned char a,b;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
StoreUnaligned(b, A);
StoreUnaligned(a, B);
A+=16;
B+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
StoreUnalignedLess(a, B, length);
StoreUnalignedLess(b, A, length);
}
void
gimp_composite_difference_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,e,alpha_a,alpha_b;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
d=vec_min(alpha_a, alpha_b);
a=vec_andc(a, alphamask);
a=vec_adds(a, d);
b=vec_andc(b, alphamask);
d=vec_subs(a, b);
e=vec_subs(b, a);
d=vec_add(d,e);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a,alphamask);
alpha_b=vec_and(b,alphamask);
d=vec_min(alpha_a,alpha_b);
a=vec_andc(a,alphamask);
a=vec_adds(a,d);
b=vec_andc(b,alphamask);
d=vec_subs(a,b);
e=vec_subs(b, a);
d=vec_add(d,e);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_darken_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
d=vec_min(a, b);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
d=vec_min(a, b);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_lighten_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,alpha_a,alpha_b;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
d=vec_min(alpha_a, alpha_b);
a=vec_andc(a, alphamask);
a=vec_adds(a, d);
b=vec_andc(b, alphamask);
d=vec_max(a, b);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a,alphamask);
alpha_b=vec_and(b,alphamask);
d=vec_min(alpha_a,alpha_b);
a=vec_andc(a,alphamask);
a=vec_adds(a,d);
b=vec_andc(b,alphamask);
d=vec_max(a, b);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_multiply_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,alpha_a,alpha_b,alpha;
vector unsigned short al,ah;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
al=vec_mule(a,b);
al=vec_add(al,ox0080);
ah=vec_mulo(a,b);
ah=vec_add(ah,ox0080);
al=vec_add(al,vec_sr(al,ox0008));
ah=vec_add(ah,vec_sr(ah,ox0008));
d=vec_perm((vector unsigned char)al,(vector unsigned char)ah,combine_high_bytes);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
al=vec_mule(a,b);
al=vec_add(al,ox0080);
ah=vec_mulo(a,b);
ah=vec_add(ah,ox0080);
al=vec_add(al,vec_sr(al,ox0008));
ah=vec_add(ah,vec_sr(ah,ox0008));
d=vec_perm((vector unsigned char)al,(vector unsigned char)ah,combine_high_bytes);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_blend_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
guchar blend = ctx->blend.blend;
union
{
vector unsigned char v;
unsigned char u8[16];
} vblend;
vector unsigned char vblendc;
vector unsigned char a,b,d;
vector unsigned short al,ah,bl,bh,one=vec_splat_u16(1);
guchar tmp;
for (tmp=0; tmp<16; tmp++ )
vblend.u8[tmp]=blend;
vblendc=vec_nor(vblend.v,vblend.v);
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
/* dest[b] = (src1[b] * blend2 + src2[b] * blend) / 255;
* to divide by 255 we use ((n+1)+(n+1)>>8)>>8
* It works for all value but 0xffff
* happily blending formula can't give this value */
al=vec_mule(a,vblendc);
ah=vec_mulo(a,vblendc);
bl=vec_mule(b,vblend.v);
bh=vec_mulo(b,vblend.v);
al=vec_add(al,bl);
al=vec_add(al,one);
al=vec_add(al,vec_sr(al,ox0008));
ah=vec_add(ah,bh);
ah=vec_add(ah,one);
ah=vec_add(ah,vec_sr(ah,ox0008));
d=vec_perm((vector unsigned char)al,(vector unsigned char)ah,combine_high_bytes);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
al=vec_mule(a,vblendc);
ah=vec_mulo(a,vblendc);
bl=vec_mule(b,vblend.v);
bh=vec_mulo(b,vblend.v);
al=vec_add(al,bl);
al=vec_add(al,one);
al=vec_add(al,vec_sr(al,ox0008));
ah=vec_add(ah,bh);
ah=vec_add(ah,one);
ah=vec_add(ah,vec_sr(ah,ox0008));
d=vec_perm((vector unsigned char)al,(vector unsigned char)ah,combine_high_bytes);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_screen_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,alpha_a,alpha_b,alpha;
vector unsigned short ah,al;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
a=vec_nor(a,a);
b=vec_nor(b,b);
al=vec_mule(a,b);
al=vec_add(al,ox0080);
ah=vec_mulo(a,b);
ah=vec_add(ah,ox0080);
al=vec_add(al,vec_sr(al,ox0008));
ah=vec_add(ah,vec_sr(ah,ox0008));
d=vec_perm((vector unsigned char)al,(vector unsigned char)ah,combine_high_bytes);
d=vec_nor(d,d);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
a=vec_nor(a,a);
b=vec_nor(b,b);
al=vec_mule(a,b);
al=vec_add(al,ox0080);
ah=vec_mulo(a,b);
ah=vec_add(ah,ox0080);
al=vec_add(al,vec_sr(al,ox0008));
ah=vec_add(ah,vec_sr(ah,ox0008));
d=vec_perm((vector unsigned char)al,(vector unsigned char)ah,combine_high_bytes);
d=vec_nor(d,d);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_grain_merge_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,alpha_a,alpha_b,alpha;
vector signed short ah,al,bh,bl;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah=vec_unpackh((vector signed char)a);
ah=vec_and(ah,ox00ff);
al=vec_unpackl((vector signed char)a);
al=vec_and(al,ox00ff);
bh=vec_unpackh((vector signed char)b);
bh=vec_and(bh,ox00ff);
bl=vec_unpackl((vector signed char)b);
bl=vec_and(bl,ox00ff);
ah=vec_add(ah,bh);
al=vec_add(al,bl);
ah=vec_add(ah,oxff80);
al=vec_add(al,oxff80);
d=vec_packsu(ah,al);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah=vec_unpackh((vector signed char)a);
ah=vec_and(ah,ox00ff);
al=vec_unpackl((vector signed char)a);
al=vec_and(al,ox00ff);
bh=vec_unpackh((vector signed char)b);
bh=vec_and(bh,ox00ff);
bl=vec_unpackl((vector signed char)b);
bl=vec_and(bl,ox00ff);
ah=vec_add(ah,bh);
al=vec_add(al,bl);
ah=vec_add(ah,oxff80);
al=vec_add(al,oxff80);
d=vec_packsu(ah,al);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_grain_extract_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d,alpha_a,alpha_b,alpha;
vector signed short ah,al,bh,bl;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah=vec_unpackh((vector signed char)a);
ah=vec_and(ah,ox00ff);
al=vec_unpackl((vector signed char)a);
al=vec_and(al,ox00ff);
bh=vec_unpackh((vector signed char)b);
bh=vec_and(bh,ox00ff);
bl=vec_unpackl((vector signed char)b);
bl=vec_and(bl,ox00ff);
ah=vec_sub(ah,bh);
al=vec_sub(al,bl);
ah=vec_sub(ah,oxff80);
al=vec_sub(al,oxff80);
d=vec_packsu(ah,al);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
/* process last pixels */
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah=vec_unpackh((vector signed char)a);
ah=vec_and(ah,ox00ff);
al=vec_unpackl((vector signed char)a);
al=vec_and(al,ox00ff);
bh=vec_unpackh((vector signed char)b);
bh=vec_and(bh,ox00ff);
bl=vec_unpackl((vector signed char)b);
bl=vec_and(bl,ox00ff);
ah=vec_sub(ah,bh);
al=vec_sub(al,bl);
ah=vec_sub(ah,oxff80);
al=vec_sub(al,oxff80);
d=vec_packsu(ah,al);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_divide_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d;
vector unsigned char alpha_a,alpha_b,alpha;
vector signed short ox0001=vec_splat_s16(1);
union
{
vector signed short v;
vector unsigned short vu;
gushort u16[8];
} ah,al,bh,bl;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah.v=vec_unpackh((vector signed char)a);
ah.v=vec_sl(ah.v,ox0008);
al.v=vec_unpackl((vector signed char)a);
al.v=vec_sl(al.v,ox0008);
bh.v=vec_unpackh((vector signed char)b);
bh.v=vec_and(bh.v,ox00ff);
bh.v=vec_add(bh.v,ox0001);
bl.v=vec_unpackl((vector signed char)b);
bl.v=vec_and(bl.v,ox00ff);
bl.v=vec_add(bl.v,ox0001);
ah.u16[0]=ah.u16[0]/bh.u16[0];
ah.u16[1]=ah.u16[1]/bh.u16[1];
ah.u16[2]=ah.u16[2]/bh.u16[2];
ah.u16[4]=ah.u16[4]/bh.u16[4];
ah.u16[5]=ah.u16[5]/bh.u16[5];
ah.u16[6]=ah.u16[6]/bh.u16[6];
al.u16[0]=al.u16[0]/bl.u16[0];
al.u16[1]=al.u16[1]/bl.u16[1];
al.u16[2]=al.u16[2]/bl.u16[2];
al.u16[4]=al.u16[4]/bl.u16[4];
al.u16[5]=al.u16[5]/bl.u16[5];
al.u16[6]=al.u16[6]/bl.u16[6];
d=vec_packs(ah.vu,al.vu);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah.v=vec_unpackh((vector signed char)a);
ah.v=vec_sl(ah.v,ox0008);
al.v=vec_unpackl((vector signed char)a);
al.v=vec_sl(al.v,ox0008);
bh.v=vec_unpackh((vector signed char)b);
bh.v=vec_and(bh.v,ox00ff);
bh.v=vec_add(bh.v,ox0001);
bl.v=vec_unpackl((vector signed char)b);
bl.v=vec_and(bl.v,ox00ff);
bl.v=vec_add(bl.v,ox0001);
ah.u16[0]=ah.u16[0]/bh.u16[0];
ah.u16[1]=ah.u16[1]/bh.u16[1];
ah.u16[2]=ah.u16[2]/bh.u16[2];
ah.u16[4]=ah.u16[4]/bh.u16[4];
ah.u16[5]=ah.u16[5]/bh.u16[5];
ah.u16[6]=ah.u16[6]/bh.u16[6];
al.u16[0]=al.u16[0]/bl.u16[0];
al.u16[1]=al.u16[1]/bl.u16[1];
al.u16[2]=al.u16[2]/bl.u16[2];
al.u16[4]=al.u16[4]/bl.u16[4];
al.u16[5]=al.u16[5]/bl.u16[5];
al.u16[6]=al.u16[6]/bl.u16[6];
d=vec_packs(ah.vu,al.vu);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnalignedLess(d, D, length);
}
void
gimp_composite_dodge_rgba8_rgba8_rgba8_altivec (GimpCompositeContext *ctx)
{
const guchar *A = ctx->A;
const guchar *B = ctx->B;
guchar *D = ctx->D;
guint length = ctx->n_pixels;
vector unsigned char a,b,d;
vector unsigned char alpha_a,alpha_b,alpha;
vector signed short ox0001=vec_splat_s16(1);
union
{
vector signed short v;
vector unsigned short vu;
gushort u16[8];
} ah,al,bh,bl;
while (length >= 4)
{
a=LoadUnaligned(A);
b=LoadUnaligned(B);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah.v=vec_unpackh((vector signed char)a);
ah.v=vec_sl(ah.v,ox0008);
al.v=vec_unpackl((vector signed char)a);
al.v=vec_sl(al.v,ox0008);
b=vec_nor(b,b);
bh.v=vec_unpackh((vector signed char)b);
bh.v=vec_and(bh.v,ox00ff);
bh.v=vec_add(bh.v,ox0001);
bl.v=vec_unpackl((vector signed char)b);
bl.v=vec_and(bl.v,ox00ff);
bl.v=vec_add(bl.v,ox0001);
ah.u16[0]=ah.u16[0]/bh.u16[0];
ah.u16[1]=ah.u16[1]/bh.u16[1];
ah.u16[2]=ah.u16[2]/bh.u16[2];
ah.u16[4]=ah.u16[4]/bh.u16[4];
ah.u16[5]=ah.u16[5]/bh.u16[5];
ah.u16[6]=ah.u16[6]/bh.u16[6];
al.u16[0]=al.u16[0]/bl.u16[0];
al.u16[1]=al.u16[1]/bl.u16[1];
al.u16[2]=al.u16[2]/bl.u16[2];
al.u16[4]=al.u16[4]/bl.u16[4];
al.u16[5]=al.u16[5]/bl.u16[5];
al.u16[6]=al.u16[6]/bl.u16[6];
d=vec_packs(ah.vu,al.vu);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnaligned(d, D);
A+=16;
B+=16;
D+=16;
length-=4;
}
length = length*4;
a=LoadUnalignedLess(A, length);
b=LoadUnalignedLess(B, length);
alpha_a=vec_and(a, alphamask);
alpha_b=vec_and(b, alphamask);
alpha=vec_min(alpha_a, alpha_b);
ah.v=vec_unpackh((vector signed char)a);
ah.v=vec_sl(ah.v,ox0008);
al.v=vec_unpackl((vector signed char)a);
al.v=vec_sl(al.v,ox0008);
b=vec_nor(b,b);
bh.v=vec_unpackh((vector signed char)b);
bh.v=vec_and(bh.v,ox00ff);
bh.v=vec_add(bh.v,ox0001);
bl.v=vec_unpackl((vector signed char)b);
bl.v=vec_and(bl.v,ox00ff);
bl.v=vec_add(bl.v,ox0001);
ah.u16[0]=ah.u16[0]/bh.u16[0];
ah.u16[1]=ah.u16[1]/bh.u16[1];
ah.u16[2]=ah.u16[2]/bh.u16[2];
ah.u16[4]=ah.u16[4]/bh.u16[4];
ah.u16[5]=ah.u16[5]/bh.u16[5];
ah.u16[6]=ah.u16[6]/bh.u16[6];
al.u16[0]=al.u16[0]/bl.u16[0];
al.u16[1]=al.u16[1]/bl.u16[1];
al.u16[2]=al.u16[2]/bl.u16[2];
al.u16[4]=al.u16[4]/bl.u16[4];
al.u16[5]=al.u16[5]/bl.u16[5];
al.u16[6]=al.u16[6]/bl.u16[6];
d=vec_packs(ah.vu,al.vu);
d=vec_andc(d, alphamask);
d=vec_or(d, alpha);
StoreUnalignedLess(d, D, length);
}
#endif /* COMPILE_IS_OKAY */
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