Fix "undefined reference to png_init_filter_functions_vsx" (#652)
Add two auxiliary source files needed to properly build libpng for the ppc64 architecture.
This commit is contained in:
ManoloFLTK
parent
c8b4a56735
commit
82ac84a7c8
@ -24,7 +24,8 @@ include ../makeinclude
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OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
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pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
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pngwtran.o pngmem.o pngerror.o pngpread.o \
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arm/arm_init.o arm/filter_neon_intrinsics.o arm/palette_neon_intrinsics.o
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arm/arm_init.o arm/filter_neon_intrinsics.o arm/palette_neon_intrinsics.o \
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powerpc/powerpc_init.o powerpc/filter_vsx_intrinsics.o
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LIBPNG = ../lib/libfltk_png$(LIBEXT)
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768
png/powerpc/filter_vsx_intrinsics.c
Normal file
768
png/powerpc/filter_vsx_intrinsics.c
Normal file
@ -0,0 +1,768 @@
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/* filter_vsx_intrinsics.c - PowerPC optimised filter functions
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*
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* Copyright (c) 2018 Cosmin Truta
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* Copyright (c) 2017 Glenn Randers-Pehrson
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* Written by Vadim Barkov, 2017.
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*
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* This code is released under the libpng license.
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* For conditions of distribution and use, see the disclaimer
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* and license in png.h
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "../pngpriv.h"
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#ifdef PNG_READ_SUPPORTED
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/* This code requires -maltivec and -mvsx on the command line: */
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#if PNG_POWERPC_VSX_IMPLEMENTATION == 1 /* intrinsics code from pngpriv.h */
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#include <altivec.h>
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#if PNG_POWERPC_VSX_OPT > 0
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#ifndef __VSX__
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# error "This code requires VSX support (POWER7 and later). Please provide -mvsx compiler flag."
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#endif
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#define vec_ld_unaligned(vec,data) vec = vec_vsx_ld(0,data)
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#define vec_st_unaligned(vec,data) vec_vsx_st(vec,0,data)
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/* Functions in this file look at most 3 pixels (a,b,c) to predict the 4th (d).
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* They're positioned like this:
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* prev: c b
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* row: a d
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* The Sub filter predicts d=a, Avg d=(a+b)/2, and Paeth predicts d to be
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* whichever of a, b, or c is closest to p=a+b-c.
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* ( this is taken from ../intel/filter_sse2_intrinsics.c )
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*/
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#define vsx_declare_common_vars(row_info,row,prev_row,offset) \
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png_byte i;\
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png_bytep rp = row + offset;\
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png_const_bytep pp = prev_row;\
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size_t unaligned_top = 16 - (((size_t)rp % 16));\
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size_t istop;\
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if(unaligned_top == 16)\
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unaligned_top = 0;\
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istop = row_info->rowbytes;\
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if((unaligned_top < istop))\
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istop -= unaligned_top;\
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else{\
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unaligned_top = istop;\
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istop = 0;\
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}
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void png_read_filter_row_up_vsx(png_row_infop row_info, png_bytep row,
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png_const_bytep prev_row)
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{
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vector unsigned char rp_vec;
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vector unsigned char pp_vec;
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vsx_declare_common_vars(row_info,row,prev_row,0)
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/* Altivec operations require 16-byte aligned data
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* but input can be unaligned. So we calculate
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* unaligned part as usual.
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*/
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for (i = 0; i < unaligned_top; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
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rp++;
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}
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/* Using SIMD while we can */
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while( istop >= 16 )
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{
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rp_vec = vec_ld(0,rp);
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vec_ld_unaligned(pp_vec,pp);
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rp_vec = vec_add(rp_vec,pp_vec);
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vec_st(rp_vec,0,rp);
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pp += 16;
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rp += 16;
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istop -= 16;
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}
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if(istop > 0)
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{
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/* If byte count of row is not divisible by 16
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* we will process remaining part as usual
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*/
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for (i = 0; i < istop; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
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rp++;
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}
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}
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}
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static const vector unsigned char VSX_LEFTSHIFTED1_4 = {16,16,16,16, 0, 1, 2, 3,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_LEFTSHIFTED2_4 = {16,16,16,16,16,16,16,16, 4, 5, 6, 7,16,16,16,16};
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static const vector unsigned char VSX_LEFTSHIFTED3_4 = {16,16,16,16,16,16,16,16,16,16,16,16, 8, 9,10,11};
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static const vector unsigned char VSX_LEFTSHIFTED1_3 = {16,16,16, 0, 1, 2,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_LEFTSHIFTED2_3 = {16,16,16,16,16,16, 3, 4, 5,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_LEFTSHIFTED3_3 = {16,16,16,16,16,16,16,16,16, 6, 7, 8,16,16,16,16};
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static const vector unsigned char VSX_LEFTSHIFTED4_3 = {16,16,16,16,16,16,16,16,16,16,16,16, 9,10,11,16};
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static const vector unsigned char VSX_NOT_SHIFTED1_4 = {16,16,16,16, 4, 5, 6, 7,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_NOT_SHIFTED2_4 = {16,16,16,16,16,16,16,16, 8, 9,10,11,16,16,16,16};
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static const vector unsigned char VSX_NOT_SHIFTED3_4 = {16,16,16,16,16,16,16,16,16,16,16,16,12,13,14,15};
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static const vector unsigned char VSX_NOT_SHIFTED1_3 = {16,16,16, 3, 4, 5,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_NOT_SHIFTED2_3 = {16,16,16,16,16,16, 6, 7, 8,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_NOT_SHIFTED3_3 = {16,16,16,16,16,16,16,16,16, 9,10,11,16,16,16,16};
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static const vector unsigned char VSX_NOT_SHIFTED4_3 = {16,16,16,16,16,16,16,16,16,16,16,16,12,13,14,16};
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static const vector unsigned char VSX_CHAR_ZERO = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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#ifdef __LITTLE_ENDIAN__
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static const vector unsigned char VSX_CHAR_TO_SHORT1_4 = { 4,16, 5,16, 6,16, 7,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT2_4 = { 8,16, 9,16,10,16,11,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT3_4 = {12,16,13,16,14,16,15,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR1_4 = {16,16,16,16, 0, 2, 4, 6,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR2_4 = {16,16,16,16,16,16,16,16, 0, 2, 4, 6,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR3_4 = {16,16,16,16,16,16,16,16,16,16,16,16, 0, 2, 4, 6};
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static const vector unsigned char VSX_CHAR_TO_SHORT1_3 = { 3,16, 4,16, 5,16,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT2_3 = { 6,16, 7,16, 8,16,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT3_3 = { 9,16,10,16,11,16,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT4_3 = {12,16,13,16,14,16,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR1_3 = {16,16,16, 0, 2, 4,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR2_3 = {16,16,16,16,16,16, 0, 2, 4,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR3_3 = {16,16,16,16,16,16,16,16,16, 0, 2, 4,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR4_3 = {16,16,16,16,16,16,16,16,16,16,16,16, 0, 2, 4,16};
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#elif defined(__BIG_ENDIAN__)
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static const vector unsigned char VSX_CHAR_TO_SHORT1_4 = {16, 4,16, 5,16, 6,16, 7,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT2_4 = {16, 8,16, 9,16,10,16,11,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT3_4 = {16,12,16,13,16,14,16,15,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR1_4 = {16,16,16,16, 1, 3, 5, 7,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR2_4 = {16,16,16,16,16,16,16,16, 1, 3, 5, 7,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR3_4 = {16,16,16,16,16,16,16,16,16,16,16,16, 1, 3, 5, 7};
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static const vector unsigned char VSX_CHAR_TO_SHORT1_3 = {16, 3,16, 4,16, 5,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT2_3 = {16, 6,16, 7,16, 8,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT3_3 = {16, 9,16,10,16,11,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_CHAR_TO_SHORT4_3 = {16,12,16,13,16,14,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR1_3 = {16,16,16, 1, 3, 5,16,16,16,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR2_3 = {16,16,16,16,16,16, 1, 3, 5,16,16,16,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR3_3 = {16,16,16,16,16,16,16,16,16, 1, 3, 5,16,16,16,16};
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static const vector unsigned char VSX_SHORT_TO_CHAR4_3 = {16,16,16,16,16,16,16,16,16,16,16,16, 1, 3, 5,16};
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#endif
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#define vsx_char_to_short(vec,offset,bpp) (vector unsigned short)vec_perm((vec),VSX_CHAR_ZERO,VSX_CHAR_TO_SHORT##offset##_##bpp)
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#define vsx_short_to_char(vec,offset,bpp) vec_perm(((vector unsigned char)(vec)),VSX_CHAR_ZERO,VSX_SHORT_TO_CHAR##offset##_##bpp)
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#ifdef PNG_USE_ABS
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# define vsx_abs(number) abs(number)
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#else
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# define vsx_abs(number) (number > 0) ? (number) : -(number)
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#endif
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void png_read_filter_row_sub4_vsx(png_row_infop row_info, png_bytep row,
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png_const_bytep prev_row)
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{
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png_byte bpp = 4;
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vector unsigned char rp_vec;
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vector unsigned char part_vec;
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vsx_declare_common_vars(row_info,row,prev_row,bpp)
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PNG_UNUSED(pp)
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/* Altivec operations require 16-byte aligned data
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* but input can be unaligned. So we calculate
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* unaligned part as usual.
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*/
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for (i = 0; i < unaligned_top; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff);
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rp++;
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}
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/* Using SIMD while we can */
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while( istop >= 16 )
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{
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for(i=0;i < bpp ; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff);
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rp++;
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}
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rp -= bpp;
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rp_vec = vec_ld(0,rp);
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part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED1_4);
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rp_vec = vec_add(rp_vec,part_vec);
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part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED2_4);
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rp_vec = vec_add(rp_vec,part_vec);
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part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED3_4);
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rp_vec = vec_add(rp_vec,part_vec);
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vec_st(rp_vec,0,rp);
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rp += 16;
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istop -= 16;
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}
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if(istop > 0)
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for (i = 0; i < istop % 16; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*(rp - bpp))) & 0xff);
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rp++;
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}
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}
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void png_read_filter_row_sub3_vsx(png_row_infop row_info, png_bytep row,
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png_const_bytep prev_row)
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{
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png_byte bpp = 3;
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vector unsigned char rp_vec;
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vector unsigned char part_vec;
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vsx_declare_common_vars(row_info,row,prev_row,bpp)
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PNG_UNUSED(pp)
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/* Altivec operations require 16-byte aligned data
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* but input can be unaligned. So we calculate
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* unaligned part as usual.
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*/
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for (i = 0; i < unaligned_top; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff);
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rp++;
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}
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/* Using SIMD while we can */
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while( istop >= 16 )
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{
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for(i=0;i < bpp ; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff);
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rp++;
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}
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rp -= bpp;
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rp_vec = vec_ld(0,rp);
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part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED1_3);
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rp_vec = vec_add(rp_vec,part_vec);
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part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED2_3);
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rp_vec = vec_add(rp_vec,part_vec);
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part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED3_3);
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rp_vec = vec_add(rp_vec,part_vec);
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part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED4_3);
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rp_vec = vec_add(rp_vec,part_vec);
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vec_st(rp_vec,0,rp);
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rp += 15;
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istop -= 16;
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/* Since 16 % bpp = 16 % 3 = 1, last element of array must
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* be proceeded manually
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*/
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*rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff);
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rp++;
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}
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if(istop > 0)
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for (i = 0; i < istop % 16; i++)
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{
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*rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff);
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rp++;
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}
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}
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void png_read_filter_row_avg4_vsx(png_row_infop row_info, png_bytep row,
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png_const_bytep prev_row)
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{
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png_byte bpp = 4;
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vector unsigned char rp_vec;
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vector unsigned char pp_vec;
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vector unsigned char pp_part_vec;
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vector unsigned char rp_part_vec;
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vector unsigned char avg_vec;
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vsx_declare_common_vars(row_info,row,prev_row,bpp)
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rp -= bpp;
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if(istop >= bpp)
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istop -= bpp;
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for (i = 0; i < bpp; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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((int)(*pp++) / 2 )) & 0xff);
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rp++;
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}
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/* Altivec operations require 16-byte aligned data
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* but input can be unaligned. So we calculate
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* unaligned part as usual.
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*/
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for (i = 0; i < unaligned_top; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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/* Using SIMD while we can */
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while( istop >= 16 )
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{
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for(i=0;i < bpp ; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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rp -= bpp;
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pp -= bpp;
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vec_ld_unaligned(pp_vec,pp);
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rp_vec = vec_ld(0,rp);
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rp_part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED1_4);
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pp_part_vec = vec_perm(pp_vec,VSX_CHAR_ZERO,VSX_NOT_SHIFTED1_4);
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avg_vec = vec_avg(rp_part_vec,pp_part_vec);
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avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
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rp_vec = vec_add(rp_vec,avg_vec);
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rp_part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED2_4);
|
||||
pp_part_vec = vec_perm(pp_vec,VSX_CHAR_ZERO,VSX_NOT_SHIFTED2_4);
|
||||
avg_vec = vec_avg(rp_part_vec,pp_part_vec);
|
||||
avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
|
||||
rp_vec = vec_add(rp_vec,avg_vec);
|
||||
|
||||
rp_part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED3_4);
|
||||
pp_part_vec = vec_perm(pp_vec,VSX_CHAR_ZERO,VSX_NOT_SHIFTED3_4);
|
||||
avg_vec = vec_avg(rp_part_vec,pp_part_vec);
|
||||
avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
|
||||
rp_vec = vec_add(rp_vec,avg_vec);
|
||||
|
||||
vec_st(rp_vec,0,rp);
|
||||
|
||||
rp += 16;
|
||||
pp += 16;
|
||||
istop -= 16;
|
||||
}
|
||||
|
||||
if(istop > 0)
|
||||
for (i = 0; i < istop % 16; i++)
|
||||
{
|
||||
*rp = (png_byte)(((int)(*rp) +
|
||||
(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
|
||||
|
||||
rp++;
|
||||
}
|
||||
}
|
||||
|
||||
void png_read_filter_row_avg3_vsx(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev_row)
|
||||
{
|
||||
png_byte bpp = 3;
|
||||
|
||||
vector unsigned char rp_vec;
|
||||
vector unsigned char pp_vec;
|
||||
vector unsigned char pp_part_vec;
|
||||
vector unsigned char rp_part_vec;
|
||||
vector unsigned char avg_vec;
|
||||
|
||||
vsx_declare_common_vars(row_info,row,prev_row,bpp)
|
||||
rp -= bpp;
|
||||
if(istop >= bpp)
|
||||
istop -= bpp;
|
||||
|
||||
for (i = 0; i < bpp; i++)
|
||||
{
|
||||
*rp = (png_byte)(((int)(*rp) +
|
||||
((int)(*pp++) / 2 )) & 0xff);
|
||||
|
||||
rp++;
|
||||
}
|
||||
|
||||
/* Altivec operations require 16-byte aligned data
|
||||
* but input can be unaligned. So we calculate
|
||||
* unaligned part as usual.
|
||||
*/
|
||||
for (i = 0; i < unaligned_top; i++)
|
||||
{
|
||||
*rp = (png_byte)(((int)(*rp) +
|
||||
(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
|
||||
|
||||
rp++;
|
||||
}
|
||||
|
||||
/* Using SIMD while we can */
|
||||
while( istop >= 16 )
|
||||
{
|
||||
for(i=0;i < bpp ; i++)
|
||||
{
|
||||
*rp = (png_byte)(((int)(*rp) +
|
||||
(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
|
||||
|
||||
rp++;
|
||||
}
|
||||
rp -= bpp;
|
||||
pp -= bpp;
|
||||
|
||||
vec_ld_unaligned(pp_vec,pp);
|
||||
rp_vec = vec_ld(0,rp);
|
||||
|
||||
rp_part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED1_3);
|
||||
pp_part_vec = vec_perm(pp_vec,VSX_CHAR_ZERO,VSX_NOT_SHIFTED1_3);
|
||||
avg_vec = vec_avg(rp_part_vec,pp_part_vec);
|
||||
avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
|
||||
rp_vec = vec_add(rp_vec,avg_vec);
|
||||
|
||||
rp_part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED2_3);
|
||||
pp_part_vec = vec_perm(pp_vec,VSX_CHAR_ZERO,VSX_NOT_SHIFTED2_3);
|
||||
avg_vec = vec_avg(rp_part_vec,pp_part_vec);
|
||||
avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
|
||||
rp_vec = vec_add(rp_vec,avg_vec);
|
||||
|
||||
rp_part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED3_3);
|
||||
pp_part_vec = vec_perm(pp_vec,VSX_CHAR_ZERO,VSX_NOT_SHIFTED3_3);
|
||||
avg_vec = vec_avg(rp_part_vec,pp_part_vec);
|
||||
avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
|
||||
rp_vec = vec_add(rp_vec,avg_vec);
|
||||
|
||||
rp_part_vec = vec_perm(rp_vec,VSX_CHAR_ZERO,VSX_LEFTSHIFTED4_3);
|
||||
pp_part_vec = vec_perm(pp_vec,VSX_CHAR_ZERO,VSX_NOT_SHIFTED4_3);
|
||||
avg_vec = vec_avg(rp_part_vec,pp_part_vec);
|
||||
avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
|
||||
rp_vec = vec_add(rp_vec,avg_vec);
|
||||
|
||||
vec_st(rp_vec,0,rp);
|
||||
|
||||
rp += 15;
|
||||
pp += 15;
|
||||
istop -= 16;
|
||||
|
||||
/* Since 16 % bpp = 16 % 3 = 1, last element of array must
|
||||
* be proceeded manually
|
||||
*/
|
||||
*rp = (png_byte)(((int)(*rp) +
|
||||
(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
|
||||
rp++;
|
||||
}
|
||||
|
||||
if(istop > 0)
|
||||
for (i = 0; i < istop % 16; i++)
|
||||
{
|
||||
*rp = (png_byte)(((int)(*rp) +
|
||||
(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
|
||||
|
||||
rp++;
|
||||
}
|
||||
}
|
||||
|
||||
/* Bytewise c ? t : e. */
|
||||
#define if_then_else(c,t,e) vec_sel(e,t,c)
|
||||
|
||||
#define vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp) {\
|
||||
c = *(pp - bpp);\
|
||||
a = *(rp - bpp);\
|
||||
b = *pp++;\
|
||||
p = b - c;\
|
||||
pc = a - c;\
|
||||
pa = vsx_abs(p);\
|
||||
pb = vsx_abs(pc);\
|
||||
pc = vsx_abs(p + pc);\
|
||||
if (pb < pa) pa = pb, a = b;\
|
||||
if (pc < pa) a = c;\
|
||||
a += *rp;\
|
||||
*rp++ = (png_byte)a;\
|
||||
}
|
||||
|
||||
void png_read_filter_row_paeth4_vsx(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev_row)
|
||||
{
|
||||
png_byte bpp = 4;
|
||||
|
||||
int a, b, c, pa, pb, pc, p;
|
||||
vector unsigned char rp_vec;
|
||||
vector unsigned char pp_vec;
|
||||
vector unsigned short a_vec,b_vec,c_vec,nearest_vec;
|
||||
vector signed short pa_vec,pb_vec,pc_vec,smallest_vec;
|
||||
|
||||
vsx_declare_common_vars(row_info,row,prev_row,bpp)
|
||||
rp -= bpp;
|
||||
if(istop >= bpp)
|
||||
istop -= bpp;
|
||||
|
||||
/* Process the first pixel in the row completely (this is the same as 'up'
|
||||
* because there is only one candidate predictor for the first row).
|
||||
*/
|
||||
for(i = 0; i < bpp ; i++)
|
||||
{
|
||||
*rp = (png_byte)( *rp + *pp);
|
||||
rp++;
|
||||
pp++;
|
||||
}
|
||||
|
||||
for(i = 0; i < unaligned_top ; i++)
|
||||
{
|
||||
vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp)
|
||||
}
|
||||
|
||||
while( istop >= 16)
|
||||
{
|
||||
for(i = 0; i < bpp ; i++)
|
||||
{
|
||||
vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp)
|
||||
}
|
||||
|
||||
rp -= bpp;
|
||||
pp -= bpp;
|
||||
rp_vec = vec_ld(0,rp);
|
||||
vec_ld_unaligned(pp_vec,pp);
|
||||
|
||||
a_vec = vsx_char_to_short(vec_perm(rp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED1_4),1,4);
|
||||
b_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_NOT_SHIFTED1_4),1,4);
|
||||
c_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED1_4),1,4);
|
||||
pa_vec = (vector signed short) vec_sub(b_vec,c_vec);
|
||||
pb_vec = (vector signed short) vec_sub(a_vec , c_vec);
|
||||
pc_vec = vec_add(pa_vec,pb_vec);
|
||||
pa_vec = vec_abs(pa_vec);
|
||||
pb_vec = vec_abs(pb_vec);
|
||||
pc_vec = vec_abs(pc_vec);
|
||||
smallest_vec = vec_min(pc_vec, vec_min(pa_vec,pb_vec));
|
||||
nearest_vec = if_then_else(
|
||||
vec_cmpeq(pa_vec,smallest_vec),
|
||||
a_vec,
|
||||
if_then_else(
|
||||
vec_cmpeq(pb_vec,smallest_vec),
|
||||
b_vec,
|
||||
c_vec
|
||||
)
|
||||
);
|
||||
rp_vec = vec_add(rp_vec,(vsx_short_to_char(nearest_vec,1,4)));
|
||||
|
||||
a_vec = vsx_char_to_short(vec_perm(rp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED2_4),2,4);
|
||||
b_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_NOT_SHIFTED2_4),2,4);
|
||||
c_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED2_4),2,4);
|
||||
pa_vec = (vector signed short) vec_sub(b_vec,c_vec);
|
||||
pb_vec = (vector signed short) vec_sub(a_vec , c_vec);
|
||||
pc_vec = vec_add(pa_vec,pb_vec);
|
||||
pa_vec = vec_abs(pa_vec);
|
||||
pb_vec = vec_abs(pb_vec);
|
||||
pc_vec = vec_abs(pc_vec);
|
||||
smallest_vec = vec_min(pc_vec, vec_min(pa_vec,pb_vec));
|
||||
nearest_vec = if_then_else(
|
||||
vec_cmpeq(pa_vec,smallest_vec),
|
||||
a_vec,
|
||||
if_then_else(
|
||||
vec_cmpeq(pb_vec,smallest_vec),
|
||||
b_vec,
|
||||
c_vec
|
||||
)
|
||||
);
|
||||
rp_vec = vec_add(rp_vec,(vsx_short_to_char(nearest_vec,2,4)));
|
||||
|
||||
a_vec = vsx_char_to_short(vec_perm(rp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED3_4),3,4);
|
||||
b_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_NOT_SHIFTED3_4),3,4);
|
||||
c_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED3_4),3,4);
|
||||
pa_vec = (vector signed short) vec_sub(b_vec,c_vec);
|
||||
pb_vec = (vector signed short) vec_sub(a_vec , c_vec);
|
||||
pc_vec = vec_add(pa_vec,pb_vec);
|
||||
pa_vec = vec_abs(pa_vec);
|
||||
pb_vec = vec_abs(pb_vec);
|
||||
pc_vec = vec_abs(pc_vec);
|
||||
smallest_vec = vec_min(pc_vec, vec_min(pa_vec,pb_vec));
|
||||
nearest_vec = if_then_else(
|
||||
vec_cmpeq(pa_vec,smallest_vec),
|
||||
a_vec,
|
||||
if_then_else(
|
||||
vec_cmpeq(pb_vec,smallest_vec),
|
||||
b_vec,
|
||||
c_vec
|
||||
)
|
||||
);
|
||||
rp_vec = vec_add(rp_vec,(vsx_short_to_char(nearest_vec,3,4)));
|
||||
|
||||
vec_st(rp_vec,0,rp);
|
||||
|
||||
rp += 16;
|
||||
pp += 16;
|
||||
istop -= 16;
|
||||
}
|
||||
|
||||
if(istop > 0)
|
||||
for (i = 0; i < istop % 16; i++)
|
||||
{
|
||||
vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp)
|
||||
}
|
||||
}
|
||||
|
||||
void png_read_filter_row_paeth3_vsx(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev_row)
|
||||
{
|
||||
png_byte bpp = 3;
|
||||
|
||||
int a, b, c, pa, pb, pc, p;
|
||||
vector unsigned char rp_vec;
|
||||
vector unsigned char pp_vec;
|
||||
vector unsigned short a_vec,b_vec,c_vec,nearest_vec;
|
||||
vector signed short pa_vec,pb_vec,pc_vec,smallest_vec;
|
||||
|
||||
vsx_declare_common_vars(row_info,row,prev_row,bpp)
|
||||
rp -= bpp;
|
||||
if(istop >= bpp)
|
||||
istop -= bpp;
|
||||
|
||||
/* Process the first pixel in the row completely (this is the same as 'up'
|
||||
* because there is only one candidate predictor for the first row).
|
||||
*/
|
||||
for(i = 0; i < bpp ; i++)
|
||||
{
|
||||
*rp = (png_byte)( *rp + *pp);
|
||||
rp++;
|
||||
pp++;
|
||||
}
|
||||
|
||||
for(i = 0; i < unaligned_top ; i++)
|
||||
{
|
||||
vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp)
|
||||
}
|
||||
|
||||
while( istop >= 16)
|
||||
{
|
||||
for(i = 0; i < bpp ; i++)
|
||||
{
|
||||
vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp)
|
||||
}
|
||||
|
||||
rp -= bpp;
|
||||
pp -= bpp;
|
||||
rp_vec = vec_ld(0,rp);
|
||||
vec_ld_unaligned(pp_vec,pp);
|
||||
|
||||
a_vec = vsx_char_to_short(vec_perm(rp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED1_3),1,3);
|
||||
b_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_NOT_SHIFTED1_3),1,3);
|
||||
c_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED1_3),1,3);
|
||||
pa_vec = (vector signed short) vec_sub(b_vec,c_vec);
|
||||
pb_vec = (vector signed short) vec_sub(a_vec , c_vec);
|
||||
pc_vec = vec_add(pa_vec,pb_vec);
|
||||
pa_vec = vec_abs(pa_vec);
|
||||
pb_vec = vec_abs(pb_vec);
|
||||
pc_vec = vec_abs(pc_vec);
|
||||
smallest_vec = vec_min(pc_vec, vec_min(pa_vec,pb_vec));
|
||||
nearest_vec = if_then_else(
|
||||
vec_cmpeq(pa_vec,smallest_vec),
|
||||
a_vec,
|
||||
if_then_else(
|
||||
vec_cmpeq(pb_vec,smallest_vec),
|
||||
b_vec,
|
||||
c_vec
|
||||
)
|
||||
);
|
||||
rp_vec = vec_add(rp_vec,(vsx_short_to_char(nearest_vec,1,3)));
|
||||
|
||||
a_vec = vsx_char_to_short(vec_perm(rp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED2_3),2,3);
|
||||
b_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_NOT_SHIFTED2_3),2,3);
|
||||
c_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED2_3),2,3);
|
||||
pa_vec = (vector signed short) vec_sub(b_vec,c_vec);
|
||||
pb_vec = (vector signed short) vec_sub(a_vec , c_vec);
|
||||
pc_vec = vec_add(pa_vec,pb_vec);
|
||||
pa_vec = vec_abs(pa_vec);
|
||||
pb_vec = vec_abs(pb_vec);
|
||||
pc_vec = vec_abs(pc_vec);
|
||||
smallest_vec = vec_min(pc_vec, vec_min(pa_vec,pb_vec));
|
||||
nearest_vec = if_then_else(
|
||||
vec_cmpeq(pa_vec,smallest_vec),
|
||||
a_vec,
|
||||
if_then_else(
|
||||
vec_cmpeq(pb_vec,smallest_vec),
|
||||
b_vec,
|
||||
c_vec
|
||||
)
|
||||
);
|
||||
rp_vec = vec_add(rp_vec,(vsx_short_to_char(nearest_vec,2,3)));
|
||||
|
||||
a_vec = vsx_char_to_short(vec_perm(rp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED3_3),3,3);
|
||||
b_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_NOT_SHIFTED3_3),3,3);
|
||||
c_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED3_3),3,3);
|
||||
pa_vec = (vector signed short) vec_sub(b_vec,c_vec);
|
||||
pb_vec = (vector signed short) vec_sub(a_vec , c_vec);
|
||||
pc_vec = vec_add(pa_vec,pb_vec);
|
||||
pa_vec = vec_abs(pa_vec);
|
||||
pb_vec = vec_abs(pb_vec);
|
||||
pc_vec = vec_abs(pc_vec);
|
||||
smallest_vec = vec_min(pc_vec, vec_min(pa_vec,pb_vec));
|
||||
nearest_vec = if_then_else(
|
||||
vec_cmpeq(pa_vec,smallest_vec),
|
||||
a_vec,
|
||||
if_then_else(
|
||||
vec_cmpeq(pb_vec,smallest_vec),
|
||||
b_vec,
|
||||
c_vec
|
||||
)
|
||||
);
|
||||
rp_vec = vec_add(rp_vec,(vsx_short_to_char(nearest_vec,3,3)));
|
||||
|
||||
a_vec = vsx_char_to_short(vec_perm(rp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED4_3),4,3);
|
||||
b_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_NOT_SHIFTED4_3),4,3);
|
||||
c_vec = vsx_char_to_short(vec_perm(pp_vec , VSX_CHAR_ZERO , VSX_LEFTSHIFTED4_3),4,3);
|
||||
pa_vec = (vector signed short) vec_sub(b_vec,c_vec);
|
||||
pb_vec = (vector signed short) vec_sub(a_vec , c_vec);
|
||||
pc_vec = vec_add(pa_vec,pb_vec);
|
||||
pa_vec = vec_abs(pa_vec);
|
||||
pb_vec = vec_abs(pb_vec);
|
||||
pc_vec = vec_abs(pc_vec);
|
||||
smallest_vec = vec_min(pc_vec, vec_min(pa_vec,pb_vec));
|
||||
nearest_vec = if_then_else(
|
||||
vec_cmpeq(pa_vec,smallest_vec),
|
||||
a_vec,
|
||||
if_then_else(
|
||||
vec_cmpeq(pb_vec,smallest_vec),
|
||||
b_vec,
|
||||
c_vec
|
||||
)
|
||||
);
|
||||
rp_vec = vec_add(rp_vec,(vsx_short_to_char(nearest_vec,4,3)));
|
||||
|
||||
vec_st(rp_vec,0,rp);
|
||||
|
||||
rp += 15;
|
||||
pp += 15;
|
||||
istop -= 16;
|
||||
|
||||
/* Since 16 % bpp = 16 % 3 = 1, last element of array must
|
||||
* be proceeded manually
|
||||
*/
|
||||
vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp)
|
||||
}
|
||||
|
||||
if(istop > 0)
|
||||
for (i = 0; i < istop % 16; i++)
|
||||
{
|
||||
vsx_paeth_process(rp,pp,a,b,c,pa,pb,pc,bpp)
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* PNG_POWERPC_VSX_OPT > 0 */
|
||||
#endif /* PNG_POWERPC_VSX_IMPLEMENTATION == 1 (intrinsics) */
|
||||
#endif /* READ */
|
||||
126
png/powerpc/powerpc_init.c
Normal file
126
png/powerpc/powerpc_init.c
Normal file
@ -0,0 +1,126 @@
|
||||
|
||||
/* powerpc_init.c - POWERPC optimised filter functions
|
||||
*
|
||||
* Copyright (c) 2018 Cosmin Truta
|
||||
* Copyright (c) 2017 Glenn Randers-Pehrson
|
||||
* Written by Vadim Barkov, 2017.
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
/* Below, after checking __linux__, various non-C90 POSIX 1003.1 functions are
|
||||
* called.
|
||||
*/
|
||||
#define _POSIX_SOURCE 1
|
||||
|
||||
#include <stdio.h>
|
||||
#include "../pngpriv.h"
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
|
||||
#if PNG_POWERPC_VSX_OPT > 0
|
||||
#ifdef PNG_POWERPC_VSX_CHECK_SUPPORTED /* Do run-time checks */
|
||||
/* WARNING: it is strongly recommended that you do not build libpng with
|
||||
* run-time checks for CPU features if at all possible. In the case of the PowerPC
|
||||
* VSX instructions there is no processor-specific way of detecting the
|
||||
* presence of the required support, therefore run-time detection is extremely
|
||||
* OS specific.
|
||||
*
|
||||
* You may set the macro PNG_POWERPC_VSX_FILE to the file name of file containing
|
||||
* a fragment of C source code which defines the png_have_vsx function. There
|
||||
* are a number of implementations in contrib/powerpc-vsx, but the only one that
|
||||
* has partial support is contrib/powerpc-vsx/linux.c - a generic Linux
|
||||
* implementation which reads /proc/cpufino.
|
||||
*/
|
||||
#ifndef PNG_POWERPC_VSX_FILE
|
||||
# ifdef __linux__
|
||||
# define PNG_POWERPC_VSX_FILE "contrib/powerpc-vsx/linux_aux.c"
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef PNG_POWERPC_VSX_FILE
|
||||
|
||||
#include <signal.h> /* for sig_atomic_t */
|
||||
static int png_have_vsx(png_structp png_ptr);
|
||||
#include PNG_POWERPC_VSX_FILE
|
||||
|
||||
#else /* PNG_POWERPC_VSX_FILE */
|
||||
# error "PNG_POWERPC_VSX_FILE undefined: no support for run-time POWERPC VSX checks"
|
||||
#endif /* PNG_POWERPC_VSX_FILE */
|
||||
#endif /* PNG_POWERPC_VSX_CHECK_SUPPORTED */
|
||||
|
||||
void
|
||||
png_init_filter_functions_vsx(png_structp pp, unsigned int bpp)
|
||||
{
|
||||
/* The switch statement is compiled in for POWERPC_VSX_API, the call to
|
||||
* png_have_vsx is compiled in for POWERPC_VSX_CHECK. If both are defined
|
||||
* the check is only performed if the API has not set the PowerPC option on
|
||||
* or off explicitly. In this case the check controls what happens.
|
||||
*/
|
||||
|
||||
#ifdef PNG_POWERPC_VSX_API_SUPPORTED
|
||||
switch ((pp->options >> PNG_POWERPC_VSX) & 3)
|
||||
{
|
||||
case PNG_OPTION_UNSET:
|
||||
/* Allow the run-time check to execute if it has been enabled -
|
||||
* thus both API and CHECK can be turned on. If it isn't supported
|
||||
* this case will fall through to the 'default' below, which just
|
||||
* returns.
|
||||
*/
|
||||
#endif /* PNG_POWERPC_VSX_API_SUPPORTED */
|
||||
#ifdef PNG_POWERPC_VSX_CHECK_SUPPORTED
|
||||
{
|
||||
static volatile sig_atomic_t no_vsx = -1; /* not checked */
|
||||
|
||||
if (no_vsx < 0)
|
||||
no_vsx = !png_have_vsx(pp);
|
||||
|
||||
if (no_vsx)
|
||||
return;
|
||||
}
|
||||
#ifdef PNG_POWERPC_VSX_API_SUPPORTED
|
||||
break;
|
||||
#endif
|
||||
#endif /* PNG_POWERPC_VSX_CHECK_SUPPORTED */
|
||||
|
||||
#ifdef PNG_POWERPC_VSX_API_SUPPORTED
|
||||
default: /* OFF or INVALID */
|
||||
return;
|
||||
|
||||
case PNG_OPTION_ON:
|
||||
/* Option turned on */
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* IMPORTANT: any new internal functions used here must be declared using
|
||||
* PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the
|
||||
* 'prefix' option to configure works:
|
||||
*
|
||||
* ./configure --with-libpng-prefix=foobar_
|
||||
*
|
||||
* Verify you have got this right by running the above command, doing a build
|
||||
* and examining pngprefix.h; it must contain a #define for every external
|
||||
* function you add. (Notice that this happens automatically for the
|
||||
* initialization function.)
|
||||
*/
|
||||
pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_vsx;
|
||||
|
||||
if (bpp == 3)
|
||||
{
|
||||
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_vsx;
|
||||
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_vsx;
|
||||
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth3_vsx;
|
||||
}
|
||||
|
||||
else if (bpp == 4)
|
||||
{
|
||||
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_vsx;
|
||||
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_vsx;
|
||||
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth4_vsx;
|
||||
}
|
||||
}
|
||||
#endif /* PNG_POWERPC_VSX_OPT > 0 */
|
||||
#endif /* READ */
|
||||
Loading…
Reference in New Issue
Block a user