1271 lines
56 KiB
C++
1271 lines
56 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <cmath>
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#include "Common/Common.h"
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//#include "VideoCommon.h" // to get debug logs
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#include "Common/CPUDetect.h"
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#include "Common/Intrinsics.h"
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#include "VideoCommon/LookUpTables.h"
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#include "VideoCommon/TextureDecoder.h"
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#include "VideoCommon/VideoConfig.h"
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// This avoids a harmless warning from a system header in Clang;
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// see http://llvm.org/bugs/show_bug.cgi?id=16093
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#if defined(__clang__) && (__clang_major__ * 100 + __clang_minor__ < 304)
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#pragma clang diagnostic ignored "-Wshadow"
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#endif
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// GameCube/Wii texture decoder
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// Decodes all known GameCube/Wii texture formats.
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// by ector
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static inline u32 DecodePixel_IA8(u16 val)
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{
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int a = val & 0xFF;
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int i = val >> 8;
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return i | (i<<8) | (i<<16) | (a<<24);
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}
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static inline u32 DecodePixel_RGB565(u16 val)
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{
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int r,g,b,a;
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r=Convert5To8((val>>11) & 0x1f);
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g=Convert6To8((val>>5 ) & 0x3f);
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b=Convert5To8((val ) & 0x1f);
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a=0xFF;
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return r | (g<<8) | (b << 16) | (a << 24);
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}
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static inline u32 DecodePixel_RGB5A3(u16 val)
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{
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int r,g,b,a;
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if ((val&0x8000))
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{
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r=Convert5To8((val>>10) & 0x1f);
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g=Convert5To8((val>>5 ) & 0x1f);
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b=Convert5To8((val ) & 0x1f);
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a=0xFF;
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}
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else
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{
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a=Convert3To8((val>>12) & 0x7);
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r=Convert4To8((val>>8 ) & 0xf);
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g=Convert4To8((val>>4 ) & 0xf);
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b=Convert4To8((val ) & 0xf);
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}
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return r | (g<<8) | (b << 16) | (a << 24);
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}
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struct DXTBlock
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{
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u16 color1;
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u16 color2;
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u8 lines[4];
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};
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static inline void DecodeBytes_C4_IA8(u32* dst, const u8* src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 4; x++)
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{
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u8 val = src[x];
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*dst++ = DecodePixel_IA8(tlut[val >> 4]);
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*dst++ = DecodePixel_IA8(tlut[val & 0xF]);
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}
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}
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static inline void DecodeBytes_C4_RGB565(u32* dst, const u8* src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 4; x++)
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{
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u8 val = src[x];
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*dst++ = DecodePixel_RGB565(Common::swap16(tlut[val >> 4]));
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*dst++ = DecodePixel_RGB565(Common::swap16(tlut[val & 0xF]));
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}
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}
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static inline void DecodeBytes_C4_RGB5A3(u32 *dst, const u8 *src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 4; x++)
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{
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u8 val = src[x];
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*dst++ = DecodePixel_RGB5A3(Common::swap16(tlut[val >> 4]));
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*dst++ = DecodePixel_RGB5A3(Common::swap16(tlut[val & 0xF]));
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}
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}
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static inline void DecodeBytes_C8_IA8(u32* dst, const u8* src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 8; x++)
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{
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*dst++ = DecodePixel_IA8(tlut[src[x]]);
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}
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}
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static inline void DecodeBytes_C8_RGB565(u32* dst, const u8* src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 8; x++)
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{
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u8 val = src[x];
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*dst++ = DecodePixel_RGB565(Common::swap16(tlut[val]));
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}
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}
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static inline void DecodeBytes_C8_RGB5A3(u32 *dst, const u8 *src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 8; x++)
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{
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u8 val = src[x];
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*dst++ = DecodePixel_RGB5A3(Common::swap16(tlut[val]));
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}
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}
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static inline void DecodeBytes_C14X2_IA8(u32* dst, const u16* src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 4; x++)
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{
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u16 val = Common::swap16(src[x]);
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*dst++ = DecodePixel_IA8(tlut[(val & 0x3FFF)]);
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}
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}
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static inline void DecodeBytes_C14X2_RGB565(u32* dst, const u16* src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 4; x++)
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{
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u16 val = Common::swap16(src[x]);
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*dst++ = DecodePixel_RGB565(Common::swap16(tlut[(val & 0x3FFF)]));
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}
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}
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static inline void DecodeBytes_C14X2_RGB5A3(u32 *dst, const u16 *src, const u8* tlut_)
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{
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const u16* tlut = (u16*) tlut_;
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for (int x = 0; x < 4; x++)
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{
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u16 val = Common::swap16(src[x]);
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*dst++ = DecodePixel_RGB5A3(Common::swap16(tlut[(val & 0x3FFF)]));
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}
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}
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static inline void DecodeBytes_IA4(u32 *dst, const u8 *src)
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{
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for (int x = 0; x < 8; x++)
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{
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const u8 val = src[x];
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u8 a = Convert4To8(val >> 4);
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u8 l = Convert4To8(val & 0xF);
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dst[x] = (a << 24) | l << 16 | l << 8 | l;
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}
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}
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#ifdef CHECK
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static inline u32 makeRGBA(int r, int g, int b, int a)
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{
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return (a<<24)|(b<<16)|(g<<8)|r;
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}
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static void DecodeDXTBlock(u32 *dst, const DXTBlock *src, int pitch)
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{
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// S3TC Decoder (Note: GCN decodes differently from PC so we can't use native support)
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// Needs more speed.
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u16 c1 = Common::swap16(src->color1);
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u16 c2 = Common::swap16(src->color2);
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int blue1 = Convert5To8(c1 & 0x1F);
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int blue2 = Convert5To8(c2 & 0x1F);
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int green1 = Convert6To8((c1 >> 5) & 0x3F);
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int green2 = Convert6To8((c2 >> 5) & 0x3F);
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int red1 = Convert5To8((c1 >> 11) & 0x1F);
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int red2 = Convert5To8((c2 >> 11) & 0x1F);
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int colors[4];
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colors[0] = MakeRGBA(red1, green1, blue1, 255);
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colors[1] = MakeRGBA(red2, green2, blue2, 255);
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if (c1 > c2)
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{
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int blue3 = ((blue2 - blue1) >> 1) - ((blue2 - blue1) >> 3);
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int green3 = ((green2 - green1) >> 1) - ((green2 - green1) >> 3);
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int red3 = ((red2 - red1) >> 1) - ((red2 - red1) >> 3);
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colors[2] = MakeRGBA(red1 + red3, green1 + green3, blue1 + blue3, 255);
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colors[3] = MakeRGBA(red2 - red3, green2 - green3, blue2 - blue3, 255);
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}
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else
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{
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colors[2] = MakeRGBA((red1 + red2 + 1) / 2, // Average
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(green1 + green2 + 1) / 2,
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(blue1 + blue2 + 1) / 2, 255);
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colors[3] = MakeRGBA(red2, green2, blue2, 0); // Color2 but transparent
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}
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for (int y = 0; y < 4; y++)
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{
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int val = src->lines[y];
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for (int x = 0; x < 4; x++)
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{
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dst[x] = colors[(val >> 6) & 3];
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val <<= 2;
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}
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dst += pitch;
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}
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}
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#endif
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// JSD 01/06/11:
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// TODO: we really should ensure BOTH the source and destination addresses are aligned to 16-byte boundaries to
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// squeeze out a little more performance. _mm_loadu_si128/_mm_storeu_si128 is slower than _mm_load_si128/_mm_store_si128
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// because they work on unaligned addresses. The processor is free to make the assumption that addresses are multiples
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// of 16 in the aligned case.
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// TODO: complete SSE2 optimization of less often used texture formats.
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// TODO: refactor algorithms using _mm_loadl_epi64 unaligned loads to prefer 128-bit aligned loads.
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void _TexDecoder_DecodeImpl(u32 * dst, const u8 * src, int width, int height, int texformat, const u8* tlut, TlutFormat tlutfmt)
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{
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const int Wsteps4 = (width + 3) / 4;
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const int Wsteps8 = (width + 7) / 8;
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switch (texformat)
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{
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case GX_TF_C4:
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if (tlutfmt == GX_TL_RGB5A3)
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{
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
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for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
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DecodeBytes_C4_RGB5A3(dst + (y + iy) * width + x, src + 4 * xStep, tlut);
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}
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else if (tlutfmt == GX_TL_IA8)
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{
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
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for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
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DecodeBytes_C4_IA8(dst + (y + iy) * width + x, src + 4 * xStep, tlut);
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}
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else if (tlutfmt == GX_TL_RGB565)
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{
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
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for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
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DecodeBytes_C4_RGB565(dst + (y + iy) * width + x, src + 4 * xStep, tlut);
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}
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break;
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case GX_TF_I4:
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{
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const __m128i kMask_x0f = _mm_set1_epi32(0x0f0f0f0fL);
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const __m128i kMask_xf0 = _mm_set1_epi32(0xf0f0f0f0L);
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#if _M_SSE >= 0x301
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// xsacha optimized with SSSE3 intrinsics
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// Produces a ~40% speed improvement over SSE2 implementation
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if (cpu_info.bSSSE3)
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{
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const __m128i mask9180 = _mm_set_epi8(9,9,9,9,1,1,1,1,8,8,8,8,0,0,0,0);
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const __m128i maskB3A2 = _mm_set_epi8(11,11,11,11,3,3,3,3,10,10,10,10,2,2,2,2);
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const __m128i maskD5C4 = _mm_set_epi8(13,13,13,13,5,5,5,5,12,12,12,12,4,4,4,4);
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const __m128i maskF7E6 = _mm_set_epi8(15,15,15,15,7,7,7,7,14,14,14,14,6,6,6,6);
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 8; iy += 2,xStep++)
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{
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const __m128i r0 = _mm_loadl_epi64((const __m128i *)(src + 8 * xStep));
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// We want the hi 4 bits of each 8-bit word replicated to 32-bit words:
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// (00000000 00000000 HhGgFfEe DdCcBbAa) -> (00000000 00000000 HHGGFFEE DDCCBBAA)
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const __m128i i1 = _mm_and_si128(r0, kMask_xf0);
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const __m128i i11 = _mm_or_si128(i1, _mm_srli_epi16(i1, 4));
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// Now we do same as above for the second half of the byte
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const __m128i i2 = _mm_and_si128(r0, kMask_x0f);
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const __m128i i22 = _mm_or_si128(i2, _mm_slli_epi16(i2,4));
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// Combine both sides
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const __m128i base = _mm_unpacklo_epi64(i11,i22);
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// Achieve the pattern visible in the masks.
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const __m128i o1 = _mm_shuffle_epi8(base, mask9180);
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const __m128i o2 = _mm_shuffle_epi8(base, maskB3A2);
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const __m128i o3 = _mm_shuffle_epi8(base, maskD5C4);
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const __m128i o4 = _mm_shuffle_epi8(base, maskF7E6);
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// Write row 0:
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_mm_storeu_si128( (__m128i*)( dst+(y + iy) * width + x ), o1 );
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_mm_storeu_si128( (__m128i*)( dst+(y + iy) * width + x + 4 ), o2 );
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// Write row 1:
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_mm_storeu_si128( (__m128i*)( dst+(y + iy+1) * width + x ), o3 );
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_mm_storeu_si128( (__m128i*)( dst+(y + iy+1) * width + x + 4 ), o4 );
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}
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}
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else
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#endif
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// JSD optimized with SSE2 intrinsics.
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// Produces a ~76% speed improvement over reference C implementation.
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{
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8 ; x < width; x += 8, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 8; iy += 2, xStep++)
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{
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const __m128i r0 = _mm_loadl_epi64((const __m128i *)(src + 8 * xStep));
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// Shuffle low 64-bits with itself to expand from (0000 0000 hgfe dcba) to (hhgg ffee ddcc bbaa)
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const __m128i r1 = _mm_unpacklo_epi8(r0, r0);
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// We want the hi 4 bits of each 8-bit word replicated to 32-bit words:
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// (HhHhGgGg FfFfEeEe DdDdCcCc BbBbAaAa) & kMask_xf0 -> (H0H0G0G0 F0F0E0E0 D0D0C0C0 B0B0A0A0)
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const __m128i i1 = _mm_and_si128(r1, kMask_xf0);
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// -> (HHHHGGGG FFFFEEEE DDDDCCCC BBBBAAAA)
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const __m128i i11 = _mm_or_si128(i1, _mm_srli_epi16(i1, 4));
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// Shuffle low 64-bits with itself to expand from (HHHHGGGG FFFFEEEE DDDDCCCC BBBBAAAA) to (DDDDDDDD CCCCCCCC BBBBBBBB AAAAAAAA)
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const __m128i i15 = _mm_unpacklo_epi8(i11, i11);
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// (DDDDDDDD CCCCCCCC BBBBBBBB AAAAAAAA) -> (BBBBBBBB BBBBBBBB AAAAAAAA AAAAAAAA)
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const __m128i i151 = _mm_unpacklo_epi8(i15, i15);
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// (DDDDDDDD CCCCCCCC BBBBBBBB AAAAAAAA) -> (DDDDDDDD DDDDDDDD CCCCCCCC CCCCCCCC)
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const __m128i i152 = _mm_unpackhi_epi8(i15, i15);
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// Shuffle hi 64-bits with itself to expand from (HHHHGGGG FFFFEEEE DDDDCCCC BBBBAAAA) to (HHHHHHHH GGGGGGGG FFFFFFFF EEEEEEEE)
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const __m128i i16 = _mm_unpackhi_epi8(i11, i11);
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// (HHHHHHHH GGGGGGGG FFFFFFFF EEEEEEEE) -> (FFFFFFFF FFFFFFFF EEEEEEEE EEEEEEEE)
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const __m128i i161 = _mm_unpacklo_epi8(i16, i16);
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// (HHHHHHHH GGGGGGGG FFFFFFFF EEEEEEEE) -> (HHHHHHHH HHHHHHHH GGGGGGGG GGGGGGGG)
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const __m128i i162 = _mm_unpackhi_epi8(i16, i16);
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// Now find the lo 4 bits of each input 8-bit word:
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const __m128i i2 = _mm_and_si128(r1, kMask_x0f);
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const __m128i i22 = _mm_or_si128(i2, _mm_slli_epi16(i2,4));
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const __m128i i25 = _mm_unpacklo_epi8(i22, i22);
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const __m128i i251 = _mm_unpacklo_epi8(i25, i25);
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const __m128i i252 = _mm_unpackhi_epi8(i25, i25);
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const __m128i i26 = _mm_unpackhi_epi8(i22, i22);
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const __m128i i261 = _mm_unpacklo_epi8(i26, i26);
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const __m128i i262 = _mm_unpackhi_epi8(i26, i26);
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// _mm_and_si128(i151, kMask_x00000000ffffffff) takes i151 and masks off 1st and 3rd 32-bit words
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// (BBBBBBBB BBBBBBBB AAAAAAAA AAAAAAAA) -> (00000000 BBBBBBBB 00000000 AAAAAAAA)
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// _mm_and_si128(i251, kMask_xffffffff00000000) takes i251 and masks off 2nd and 4th 32-bit words
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// (bbbbbbbb bbbbbbbb aaaaaaaa aaaaaaaa) -> (bbbbbbbb 00000000 aaaaaaaa 00000000)
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// And last but not least, _mm_or_si128 ORs those two together, giving us the interleaving we desire:
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// (00000000 BBBBBBBB 00000000 AAAAAAAA) | (bbbbbbbb 00000000 aaaaaaaa 00000000) -> (bbbbbbbb BBBBBBBB aaaaaaaa AAAAAAAA)
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const __m128i kMask_x00000000ffffffff = _mm_set_epi32(0x00000000L, 0xffffffffL, 0x00000000L, 0xffffffffL);
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const __m128i kMask_xffffffff00000000 = _mm_set_epi32(0xffffffffL, 0x00000000L, 0xffffffffL, 0x00000000L);
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const __m128i o1 = _mm_or_si128(_mm_and_si128(i151, kMask_x00000000ffffffff), _mm_and_si128(i251, kMask_xffffffff00000000));
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const __m128i o2 = _mm_or_si128(_mm_and_si128(i152, kMask_x00000000ffffffff), _mm_and_si128(i252, kMask_xffffffff00000000));
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// These two are for the next row; same pattern as above. We batched up two rows because our input was 64 bits.
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const __m128i o3 = _mm_or_si128(_mm_and_si128(i161, kMask_x00000000ffffffff), _mm_and_si128(i261, kMask_xffffffff00000000));
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const __m128i o4 = _mm_or_si128(_mm_and_si128(i162, kMask_x00000000ffffffff), _mm_and_si128(i262, kMask_xffffffff00000000));
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// Write row 0:
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_mm_storeu_si128( (__m128i*)( dst+(y + iy) * width + x ), o1 );
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_mm_storeu_si128( (__m128i*)( dst+(y + iy) * width + x + 4 ), o2 );
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// Write row 1:
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_mm_storeu_si128( (__m128i*)( dst+(y + iy+1) * width + x ), o3 );
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_mm_storeu_si128( (__m128i*)( dst+(y + iy+1) * width + x + 4 ), o4 );
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}
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}
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}
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|
break;
|
|
case GX_TF_I8: // speed critical
|
|
{
|
|
#if _M_SSE >= 0x301
|
|
// xsacha optimized with SSSE3 intrinsics
|
|
// Produces a ~10% speed improvement over SSE2 implementation
|
|
if (cpu_info.bSSSE3)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8,yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; ++iy, xStep++)
|
|
{
|
|
const __m128i mask3210 = _mm_set_epi8(3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0);
|
|
|
|
const __m128i mask7654 = _mm_set_epi8(7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4);
|
|
__m128i *quaddst, r, rgba0, rgba1;
|
|
// Load 64 bits from `src` into an __m128i with upper 64 bits zeroed: (0000 0000 hgfe dcba)
|
|
r = _mm_loadl_epi64((const __m128i *)(src + 8 * xStep));
|
|
// Shuffle select bytes to expand from (0000 0000 hgfe dcba) to:
|
|
rgba0 = _mm_shuffle_epi8(r, mask3210); // (dddd cccc bbbb aaaa)
|
|
rgba1 = _mm_shuffle_epi8(r, mask7654); // (hhhh gggg ffff eeee)
|
|
|
|
quaddst = (__m128i *)(dst + (y + iy)*width + x);
|
|
_mm_storeu_si128(quaddst, rgba0);
|
|
_mm_storeu_si128(quaddst+1, rgba1);
|
|
}
|
|
|
|
}
|
|
else
|
|
#endif
|
|
// JSD optimized with SSE2 intrinsics.
|
|
// Produces an ~86% speed improvement over reference C implementation.
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8,yStep++)
|
|
{
|
|
// Each loop iteration processes 4 rows from 4 64-bit reads.
|
|
const u8* src2 = src + 32 * yStep;
|
|
// TODO: is it more efficient to group the loads together sequentially and also the stores at the end?
|
|
// _mm_stream instead of _mm_store on my AMD Phenom II x410 made performance significantly WORSE, so I
|
|
// went with _mm_stores. Perhaps there is some edge case here creating the terrible performance or we're
|
|
// not aligned to 16-byte boundaries. I don't know.
|
|
__m128i *quaddst;
|
|
|
|
// Load 64 bits from `src` into an __m128i with upper 64 bits zeroed: (0000 0000 hgfe dcba)
|
|
const __m128i r0 = _mm_loadl_epi64((const __m128i *)src2);
|
|
// Shuffle low 64-bits with itself to expand from (0000 0000 hgfe dcba) to (hhgg ffee ddcc bbaa)
|
|
const __m128i r1 = _mm_unpacklo_epi8(r0, r0);
|
|
|
|
// Shuffle low 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (dddd cccc bbbb aaaa)
|
|
const __m128i rgba0 = _mm_unpacklo_epi8(r1, r1);
|
|
// Shuffle hi 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (hhhh gggg ffff eeee)
|
|
const __m128i rgba1 = _mm_unpackhi_epi8(r1, r1);
|
|
|
|
// Store (dddd cccc bbbb aaaa) out:
|
|
quaddst = (__m128i *)(dst + (y + 0)*width + x);
|
|
_mm_storeu_si128(quaddst, rgba0);
|
|
// Store (hhhh gggg ffff eeee) out:
|
|
_mm_storeu_si128(quaddst+1, rgba1);
|
|
|
|
// Load 64 bits from `src` into an __m128i with upper 64 bits zeroed: (0000 0000 hgfe dcba)
|
|
src2 += 8;
|
|
const __m128i r2 = _mm_loadl_epi64((const __m128i *)src2);
|
|
// Shuffle low 64-bits with itself to expand from (0000 0000 hgfe dcba) to (hhgg ffee ddcc bbaa)
|
|
const __m128i r3 = _mm_unpacklo_epi8(r2, r2);
|
|
|
|
// Shuffle low 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (dddd cccc bbbb aaaa)
|
|
const __m128i rgba2 = _mm_unpacklo_epi8(r3, r3);
|
|
// Shuffle hi 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (hhhh gggg ffff eeee)
|
|
const __m128i rgba3 = _mm_unpackhi_epi8(r3, r3);
|
|
|
|
// Store (dddd cccc bbbb aaaa) out:
|
|
quaddst = (__m128i *)(dst + (y + 1)*width + x);
|
|
_mm_storeu_si128(quaddst, rgba2);
|
|
// Store (hhhh gggg ffff eeee) out:
|
|
_mm_storeu_si128(quaddst+1, rgba3);
|
|
|
|
// Load 64 bits from `src` into an __m128i with upper 64 bits zeroed: (0000 0000 hgfe dcba)
|
|
src2 += 8;
|
|
const __m128i r4 = _mm_loadl_epi64((const __m128i *)src2);
|
|
// Shuffle low 64-bits with itself to expand from (0000 0000 hgfe dcba) to (hhgg ffee ddcc bbaa)
|
|
const __m128i r5 = _mm_unpacklo_epi8(r4, r4);
|
|
|
|
// Shuffle low 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (dddd cccc bbbb aaaa)
|
|
const __m128i rgba4 = _mm_unpacklo_epi8(r5, r5);
|
|
// Shuffle hi 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (hhhh gggg ffff eeee)
|
|
const __m128i rgba5 = _mm_unpackhi_epi8(r5, r5);
|
|
|
|
// Store (dddd cccc bbbb aaaa) out:
|
|
quaddst = (__m128i *)(dst + (y + 2)*width + x);
|
|
_mm_storeu_si128(quaddst, rgba4);
|
|
// Store (hhhh gggg ffff eeee) out:
|
|
_mm_storeu_si128(quaddst+1, rgba5);
|
|
|
|
// Load 64 bits from `src` into an __m128i with upper 64 bits zeroed: (0000 0000 hgfe dcba)
|
|
src2 += 8;
|
|
const __m128i r6 = _mm_loadl_epi64((const __m128i *)src2);
|
|
// Shuffle low 64-bits with itself to expand from (0000 0000 hgfe dcba) to (hhgg ffee ddcc bbaa)
|
|
const __m128i r7 = _mm_unpacklo_epi8(r6, r6);
|
|
|
|
// Shuffle low 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (dddd cccc bbbb aaaa)
|
|
const __m128i rgba6 = _mm_unpacklo_epi8(r7, r7);
|
|
// Shuffle hi 64-bits with itself to expand from (hhgg ffee ddcc bbaa) to (hhhh gggg ffff eeee)
|
|
const __m128i rgba7 = _mm_unpackhi_epi8(r7, r7);
|
|
|
|
// Store (dddd cccc bbbb aaaa) out:
|
|
quaddst = (__m128i *)(dst + (y + 3)*width + x);
|
|
_mm_storeu_si128(quaddst, rgba6);
|
|
// Store (hhhh gggg ffff eeee) out:
|
|
_mm_storeu_si128(quaddst+1, rgba7);
|
|
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case GX_TF_C8:
|
|
if (tlutfmt == GX_TL_RGB5A3)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
DecodeBytes_C8_RGB5A3((u32*)dst + (y + iy) * width + x, src + 8 * xStep, tlut);
|
|
}
|
|
else if (tlutfmt == GX_TL_IA8)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
DecodeBytes_C8_IA8(dst + (y + iy) * width + x, src + 8 * xStep, tlut);
|
|
|
|
}
|
|
else if (tlutfmt == GX_TL_RGB565)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
DecodeBytes_C8_RGB565(dst + (y + iy) * width + x, src + 8 * xStep, tlut);
|
|
|
|
}
|
|
break;
|
|
case GX_TF_IA4:
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
DecodeBytes_IA4(dst + (y + iy) * width + x, src + 8 * xStep);
|
|
}
|
|
break;
|
|
case GX_TF_IA8:
|
|
{
|
|
#if _M_SSE >= 0x301
|
|
// xsacha optimized with SSSE3 intrinsics.
|
|
// Produces an ~50% speed improvement over SSE2 implementation.
|
|
if (cpu_info.bSSSE3)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
{
|
|
const __m128i mask = _mm_set_epi8(6, 7, 7, 7, 4, 5, 5, 5, 2, 3, 3, 3, 0, 1, 1, 1);
|
|
// Load 4x 16-bit IA8 samples from `src` into an __m128i with upper 64 bits zeroed: (0000 0000 hgfe dcba)
|
|
const __m128i r0 = _mm_loadl_epi64((const __m128i *)(src + 8 * xStep));
|
|
// Shuffle to (ghhh efff cddd abbb)
|
|
const __m128i r1 = _mm_shuffle_epi8(r0, mask);
|
|
_mm_storeu_si128( (__m128i*)(dst + (y + iy) * width + x), r1 );
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
// JSD optimized with SSE2 intrinsics.
|
|
// Produces an ~80% speed improvement over reference C implementation.
|
|
{
|
|
const __m128i kMask_xf0 = _mm_set_epi32(0x00000000L, 0x00000000L, 0xff00ff00L, 0xff00ff00L);
|
|
const __m128i kMask_x0f = _mm_set_epi32(0x00000000L, 0x00000000L, 0x00ff00ffL, 0x00ff00ffL);
|
|
const __m128i kMask_xf000 = _mm_set_epi32(0xff000000L, 0xff000000L, 0xff000000L, 0xff000000L);
|
|
const __m128i kMask_x0fff = _mm_set_epi32(0x00ffffffL, 0x00ffffffL, 0x00ffffffL, 0x00ffffffL);
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
{
|
|
// Expands a 16-bit "IA" to a 32-bit "AIII". Each char is an 8-bit value.
|
|
|
|
// Load 4x 16-bit IA8 samples from `src` into an __m128i with upper 64 bits zeroed: (0000 0000 hgfe dcba)
|
|
const __m128i r0 = _mm_loadl_epi64((const __m128i *)(src+ 8 * xStep));
|
|
|
|
// Logical shift all 16-bit words right by 8 bits (0000 0000 hgfe dcba) to (0000 0000 0h0f 0d0b)
|
|
// This gets us only the I components.
|
|
const __m128i i0 = _mm_srli_epi16(r0, 8);
|
|
|
|
// Now join up the I components from their original positions but mask out the A components.
|
|
// (0000 0000 hgfe dcba) & kMask_xFF00 -> (0000 0000 h0f0 d0b0)
|
|
// (0000 0000 h0f0 d0b0) | (0000 0000 0h0f 0d0b) -> (0000 0000 hhff ddbb)
|
|
const __m128i i1 = _mm_or_si128(_mm_and_si128(r0, kMask_xf0), i0);
|
|
|
|
// Shuffle low 64-bits with itself to expand from (0000 0000 hhff ddbb) to (hhhh ffff dddd bbbb)
|
|
const __m128i i2 = _mm_unpacklo_epi8(i1, i1);
|
|
// (hhhh ffff dddd bbbb) & kMask_x0fff -> (0hhh 0fff 0ddd 0bbb)
|
|
const __m128i i3 = _mm_and_si128(i2, kMask_x0fff);
|
|
|
|
// Now that we have the I components in 32-bit word form, time work out the A components into
|
|
// their final positions.
|
|
|
|
// (0000 0000 hgfe dcba) & kMask_x00FF -> (0000 0000 0g0e 0c0a)
|
|
const __m128i a0 = _mm_and_si128(r0, kMask_x0f);
|
|
// (0000 0000 0g0e 0c0a) -> (00gg 00ee 00cc 00aa)
|
|
const __m128i a1 = _mm_unpacklo_epi8(a0, a0);
|
|
// (00gg 00ee 00cc 00aa) << 16 -> (gg00 ee00 cc00 aa00)
|
|
const __m128i a2 = _mm_slli_epi32(a1, 16);
|
|
// (gg00 ee00 cc00 aa00) & kMask_xf000 -> (g000 e000 c000 a000)
|
|
const __m128i a3 = _mm_and_si128(a2, kMask_xf000);
|
|
|
|
// Simply OR up i3 and a3 now and that's our result:
|
|
// (0hhh 0fff 0ddd 0bbb) | (g000 e000 c000 a000) -> (ghhh efff cddd abbb)
|
|
const __m128i r1 = _mm_or_si128(i3, a3);
|
|
|
|
// write out the 128-bit result:
|
|
_mm_storeu_si128( (__m128i*)(dst + (y + iy) * width + x), r1 );
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case GX_TF_C14X2:
|
|
if (tlutfmt == GX_TL_RGB5A3)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
DecodeBytes_C14X2_RGB5A3(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlut);
|
|
}
|
|
else if (tlutfmt == GX_TL_IA8)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
DecodeBytes_C14X2_IA8(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlut);
|
|
}
|
|
else if (tlutfmt == GX_TL_RGB565)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
DecodeBytes_C14X2_RGB565(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlut);
|
|
}
|
|
break;
|
|
case GX_TF_RGB565:
|
|
{
|
|
// JSD optimized with SSE2 intrinsics.
|
|
// Produces an ~78% speed improvement over reference C implementation.
|
|
const __m128i kMaskR0 = _mm_set1_epi32(0x000000F8);
|
|
const __m128i kMaskG0 = _mm_set1_epi32(0x0000FC00);
|
|
const __m128i kMaskG1 = _mm_set1_epi32(0x00000300);
|
|
const __m128i kMaskB0 = _mm_set1_epi32(0x00F80000);
|
|
const __m128i kAlpha = _mm_set1_epi32(0xFF000000);
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
{
|
|
__m128i *dxtsrc = (__m128i *)(src + 8 * xStep);
|
|
// Load 4x 16-bit colors: (0000 0000 hgfe dcba)
|
|
// where hg, fe, ba, and dc are 16-bit colors in big-endian order
|
|
const __m128i rgb565x4 = _mm_loadl_epi64(dxtsrc);
|
|
|
|
// The big-endian 16-bit colors `ba` and `dc` look like 0b_gggBBBbb_RRRrrGGg in a little endian xmm register
|
|
// Unpack `hgfe dcba` to `hhgg ffee ddcc bbaa`, where each 32-bit word is now 0b_gggBBBbb_RRRrrGGg_gggBBBbb_RRRrrGGg
|
|
const __m128i c0 = _mm_unpacklo_epi16(rgb565x4, rgb565x4);
|
|
|
|
// swizzle 0b_gggBBBbb_RRRrrGGg_gggBBBbb_RRRrrGGg
|
|
// to 0b_11111111_BBBbbBBB_GGggggGG_RRRrrRRR
|
|
|
|
// 0b_gggBBBbb_RRRrrGGg_gggBBBbb_RRRrrGGg &
|
|
// 0b_00000000_00000000_00000000_11111000 =
|
|
// 0b_00000000_00000000_00000000_RRRrr000
|
|
const __m128i r0 = _mm_and_si128(c0, kMaskR0);
|
|
// 0b_00000000_00000000_00000000_RRRrr000 >> 5 [32] =
|
|
// 0b_00000000_00000000_00000000_00000RRR
|
|
const __m128i r1 = _mm_srli_epi32(r0, 5);
|
|
|
|
// 0b_gggBBBbb_RRRrrGGg_gggBBBbb_RRRrrGGg >> 3 [32] =
|
|
// 0b_000gggBB_BbbRRRrr_GGggggBB_BbbRRRrr &
|
|
// 0b_00000000_00000000_11111100_00000000 =
|
|
// 0b_00000000_00000000_GGgggg00_00000000
|
|
const __m128i gtmp = _mm_srli_epi32(c0, 3);
|
|
const __m128i g0 = _mm_and_si128(gtmp, kMaskG0);
|
|
// 0b_GGggggBB_BbbRRRrr_GGggggBB_Bbb00000 >> 6 [32] =
|
|
// 0b_000000GG_ggggBBBb_bRRRrrGG_ggggBBBb &
|
|
// 0b_00000000_00000000_00000011_00000000 =
|
|
// 0b_00000000_00000000_000000GG_00000000 =
|
|
const __m128i g1 = _mm_and_si128(_mm_srli_epi32(gtmp, 6), kMaskG1);
|
|
|
|
// 0b_gggBBBbb_RRRrrGGg_gggBBBbb_RRRrrGGg >> 5 [32] =
|
|
// 0b_00000ggg_BBBbbRRR_rrGGgggg_BBBbbRRR &
|
|
// 0b_00000000_11111000_00000000_00000000 =
|
|
// 0b_00000000_BBBbb000_00000000_00000000
|
|
const __m128i b0 = _mm_and_si128(_mm_srli_epi32(c0, 5), kMaskB0);
|
|
// 0b_00000000_BBBbb000_00000000_00000000 >> 5 [16] =
|
|
// 0b_00000000_00000BBB_00000000_00000000
|
|
const __m128i b1 = _mm_srli_epi16(b0, 5);
|
|
|
|
// OR together the final RGB bits and the alpha component:
|
|
const __m128i abgr888x4 = _mm_or_si128(
|
|
_mm_or_si128(
|
|
_mm_or_si128(r0, r1),
|
|
_mm_or_si128(g0, g1)
|
|
),
|
|
_mm_or_si128(
|
|
_mm_or_si128(b0, b1),
|
|
kAlpha
|
|
)
|
|
);
|
|
|
|
__m128i *ptr = (__m128i *)(dst + (y + iy) * width + x);
|
|
_mm_storeu_si128(ptr, abgr888x4);
|
|
}
|
|
}
|
|
break;
|
|
case GX_TF_RGB5A3:
|
|
{
|
|
const __m128i kMask_x1f = _mm_set1_epi32(0x0000001fL);
|
|
const __m128i kMask_x0f = _mm_set1_epi32(0x0000000fL);
|
|
const __m128i kMask_x07 = _mm_set1_epi32(0x00000007L);
|
|
// This is the hard-coded 0xFF alpha constant that is ORed in place after the RGB are calculated
|
|
// for the RGB555 case when (s[x] & 0x8000) is true for all pixels.
|
|
const __m128i aVxff00 = _mm_set1_epi32(0xFF000000L);
|
|
|
|
#if _M_SSE >= 0x301
|
|
// xsacha optimized with SSSE3 intrinsics (2 in 4 cases)
|
|
// Produces a ~10% speed improvement over SSE2 implementation
|
|
if (cpu_info.bSSSE3)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
{
|
|
u32 *newdst = dst+(y+iy)*width+x;
|
|
const __m128i mask = _mm_set_epi8(-128,-128,6,7,-128,-128,4,5,-128,-128,2,3,-128,-128,0,1);
|
|
const __m128i valV = _mm_shuffle_epi8(_mm_loadl_epi64((const __m128i*)(src + 8 * xStep)),mask);
|
|
int cmp = _mm_movemask_epi8(valV); //MSB: 0x2 = val0; 0x20=val1; 0x200 = val2; 0x2000=val3
|
|
if ((cmp&0x2222)==0x2222) // SSSE3 case #1: all 4 pixels are in RGB555 and alpha = 0xFF.
|
|
{
|
|
// Swizzle bits: 00012345 -> 12345123
|
|
|
|
//r0 = (((val0>>10) & 0x1f) << 3) | (((val0>>10) & 0x1f) >> 2);
|
|
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 10), kMask_x1f);
|
|
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 3), _mm_srli_epi16(tmprV, 2) );
|
|
|
|
//g0 = (((val0>>5 ) & 0x1f) << 3) | (((val0>>5 ) & 0x1f) >> 2);
|
|
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 5), kMask_x1f);
|
|
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 3), _mm_srli_epi16(tmpgV, 2) );
|
|
|
|
//b0 = (((val0 ) & 0x1f) << 3) | (((val0 ) & 0x1f) >> 2);
|
|
const __m128i tmpbV = _mm_and_si128(valV, kMask_x1f);
|
|
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 3), _mm_srli_epi16(tmpbV, 2) );
|
|
|
|
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
|
|
const __m128i final = _mm_or_si128(_mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
|
|
_mm_or_si128(_mm_slli_epi32(bV, 16), aVxff00));
|
|
_mm_storeu_si128( (__m128i*)newdst, final );
|
|
}
|
|
else if (!(cmp&0x2222)) // SSSE3 case #2: all 4 pixels are in RGBA4443.
|
|
{
|
|
// Swizzle bits: 00001234 -> 12341234
|
|
|
|
//r0 = (((val0>>8 ) & 0xf) << 4) | ((val0>>8 ) & 0xf);
|
|
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 8), kMask_x0f);
|
|
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 4), tmprV );
|
|
|
|
//g0 = (((val0>>4 ) & 0xf) << 4) | ((val0>>4 ) & 0xf);
|
|
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 4), kMask_x0f);
|
|
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 4), tmpgV );
|
|
|
|
//b0 = (((val0 ) & 0xf) << 4) | ((val0 ) & 0xf);
|
|
const __m128i tmpbV = _mm_and_si128(valV, kMask_x0f);
|
|
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 4), tmpbV );
|
|
//a0 = (((val0>>12) & 0x7) << 5) | (((val0>>12) & 0x7) << 2) | (((val0>>12) & 0x7) >> 1);
|
|
const __m128i tmpaV = _mm_and_si128(_mm_srli_epi16(valV, 12), kMask_x07);
|
|
const __m128i aV = _mm_or_si128(
|
|
_mm_slli_epi16(tmpaV, 5),
|
|
_mm_or_si128(
|
|
_mm_slli_epi16(tmpaV, 2),
|
|
_mm_srli_epi16(tmpaV, 1)
|
|
)
|
|
);
|
|
|
|
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
|
|
const __m128i final = _mm_or_si128(_mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
|
|
_mm_or_si128(_mm_slli_epi32(bV, 16), _mm_slli_epi32(aV, 24)));
|
|
_mm_storeu_si128( (__m128i*)newdst, final );
|
|
}
|
|
else
|
|
{
|
|
// TODO: Vectorise (Either 4-way branch or do both and select is better than this)
|
|
u32 *vals = (u32*) &valV;
|
|
int r,g,b,a;
|
|
for (int i=0; i < 4; ++i)
|
|
{
|
|
if (vals[i] & 0x8000)
|
|
{
|
|
// Swizzle bits: 00012345 -> 12345123
|
|
r = (((vals[i]>>10) & 0x1f) << 3) | (((vals[i]>>10) & 0x1f) >> 2);
|
|
g = (((vals[i]>>5 ) & 0x1f) << 3) | (((vals[i]>>5 ) & 0x1f) >> 2);
|
|
b = (((vals[i] ) & 0x1f) << 3) | (((vals[i] ) & 0x1f) >> 2);
|
|
a = 0xFF;
|
|
}
|
|
else
|
|
{
|
|
a = (((vals[i]>>12) & 0x7) << 5) | (((vals[i]>>12) & 0x7) << 2) | (((vals[i]>>12) & 0x7) >> 1);
|
|
// Swizzle bits: 00001234 -> 12341234
|
|
r = (((vals[i]>>8 ) & 0xf) << 4) | ((vals[i]>>8 ) & 0xf);
|
|
g = (((vals[i]>>4 ) & 0xf) << 4) | ((vals[i]>>4 ) & 0xf);
|
|
b = (((vals[i] ) & 0xf) << 4) | ((vals[i] ) & 0xf);
|
|
}
|
|
newdst[i] = r | (g << 8) | (b << 16) | (a << 24);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
// JSD optimized with SSE2 intrinsics (2 in 4 cases)
|
|
// Produces a ~25% speed improvement over reference C implementation.
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
|
|
{
|
|
u32 *newdst = dst+(y+iy)*width+x;
|
|
const u16 *newsrc = (const u16*)(src + 8 * xStep);
|
|
|
|
// TODO: weak point
|
|
const u16 val0 = Common::swap16(newsrc[0]);
|
|
const u16 val1 = Common::swap16(newsrc[1]);
|
|
const u16 val2 = Common::swap16(newsrc[2]);
|
|
const u16 val3 = Common::swap16(newsrc[3]);
|
|
|
|
const __m128i valV = _mm_set_epi16(0, val3, 0, val2, 0, val1, 0, val0);
|
|
|
|
// Need to check all 4 pixels' MSBs to ensure we can do data-parallelism:
|
|
if (((val0 & 0x8000) & (val1 & 0x8000) & (val2 & 0x8000) & (val3 & 0x8000)) == 0x8000)
|
|
{
|
|
// SSE2 case #1: all 4 pixels are in RGB555 and alpha = 0xFF.
|
|
|
|
// Swizzle bits: 00012345 -> 12345123
|
|
|
|
//r0 = (((val0>>10) & 0x1f) << 3) | (((val0>>10) & 0x1f) >> 2);
|
|
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 10), kMask_x1f);
|
|
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 3), _mm_srli_epi16(tmprV, 2) );
|
|
|
|
//g0 = (((val0>>5 ) & 0x1f) << 3) | (((val0>>5 ) & 0x1f) >> 2);
|
|
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 5), kMask_x1f);
|
|
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 3), _mm_srli_epi16(tmpgV, 2) );
|
|
|
|
//b0 = (((val0 ) & 0x1f) << 3) | (((val0 ) & 0x1f) >> 2);
|
|
const __m128i tmpbV = _mm_and_si128(valV, kMask_x1f);
|
|
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 3), _mm_srli_epi16(tmpbV, 2) );
|
|
|
|
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
|
|
const __m128i final = _mm_or_si128(_mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
|
|
_mm_or_si128(_mm_slli_epi32(bV, 16), aVxff00));
|
|
|
|
// write the final result:
|
|
_mm_storeu_si128( (__m128i*)newdst, final );
|
|
}
|
|
else if (((val0 & 0x8000) | (val1 & 0x8000) | (val2 & 0x8000) | (val3 & 0x8000)) == 0x0000)
|
|
{
|
|
// SSE2 case #2: all 4 pixels are in RGBA4443.
|
|
|
|
// Swizzle bits: 00001234 -> 12341234
|
|
|
|
//r0 = (((val0>>8 ) & 0xf) << 4) | ((val0>>8 ) & 0xf);
|
|
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 8), kMask_x0f);
|
|
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 4), tmprV );
|
|
|
|
//g0 = (((val0>>4 ) & 0xf) << 4) | ((val0>>4 ) & 0xf);
|
|
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 4), kMask_x0f);
|
|
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 4), tmpgV );
|
|
|
|
//b0 = (((val0 ) & 0xf) << 4) | ((val0 ) & 0xf);
|
|
const __m128i tmpbV = _mm_and_si128(valV, kMask_x0f);
|
|
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 4), tmpbV );
|
|
|
|
//a0 = (((val0>>12) & 0x7) << 5) | (((val0>>12) & 0x7) << 2) | (((val0>>12) & 0x7) >> 1);
|
|
const __m128i tmpaV = _mm_and_si128(_mm_srli_epi16(valV, 12), kMask_x07);
|
|
const __m128i aV = _mm_or_si128(
|
|
_mm_slli_epi16(tmpaV, 5),
|
|
_mm_or_si128(
|
|
_mm_slli_epi16(tmpaV, 2),
|
|
_mm_srli_epi16(tmpaV, 1)
|
|
)
|
|
);
|
|
|
|
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
|
|
const __m128i final = _mm_or_si128(_mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
|
|
_mm_or_si128(_mm_slli_epi32(bV, 16), _mm_slli_epi32(aV, 24)));
|
|
|
|
// write the final result:
|
|
_mm_storeu_si128( (__m128i*)newdst, final );
|
|
}
|
|
else
|
|
{
|
|
// TODO: Vectorise (Either 4-way branch or do both and select is better than this)
|
|
u32 *vals = (u32*) &valV;
|
|
int r,g,b,a;
|
|
for (int i=0; i < 4; ++i)
|
|
{
|
|
if (vals[i] & 0x8000)
|
|
{
|
|
// Swizzle bits: 00012345 -> 12345123
|
|
r = (((vals[i]>>10) & 0x1f) << 3) | (((vals[i]>>10) & 0x1f) >> 2);
|
|
g = (((vals[i]>>5 ) & 0x1f) << 3) | (((vals[i]>>5 ) & 0x1f) >> 2);
|
|
b = (((vals[i] ) & 0x1f) << 3) | (((vals[i] ) & 0x1f) >> 2);
|
|
a = 0xFF;
|
|
}
|
|
else
|
|
{
|
|
a = (((vals[i]>>12) & 0x7) << 5) | (((vals[i]>>12) & 0x7) << 2) | (((vals[i]>>12) & 0x7) >> 1);
|
|
// Swizzle bits: 00001234 -> 12341234
|
|
r = (((vals[i]>>8 ) & 0xf) << 4) | ((vals[i]>>8 ) & 0xf);
|
|
g = (((vals[i]>>4 ) & 0xf) << 4) | ((vals[i]>>4 ) & 0xf);
|
|
b = (((vals[i] ) & 0xf) << 4) | ((vals[i] ) & 0xf);
|
|
}
|
|
newdst[i] = r | (g << 8) | (b << 16) | (a << 24);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case GX_TF_RGBA8: // speed critical
|
|
{
|
|
#if _M_SSE >= 0x301
|
|
// xsacha optimized with SSSE3 instrinsics
|
|
// Produces a ~30% speed improvement over SSE2 implementation
|
|
if (cpu_info.bSSSE3)
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
{
|
|
const u8* src2 = src + 64 * yStep;
|
|
const __m128i mask0312 = _mm_set_epi8(12,15,13,14,8,11,9,10,4,7,5,6,0,3,1,2);
|
|
const __m128i ar0 = _mm_loadu_si128((__m128i*)src2);
|
|
const __m128i ar1 = _mm_loadu_si128((__m128i*)src2+1);
|
|
const __m128i gb0 = _mm_loadu_si128((__m128i*)src2+2);
|
|
const __m128i gb1 = _mm_loadu_si128((__m128i*)src2+3);
|
|
|
|
|
|
const __m128i rgba00 = _mm_shuffle_epi8(_mm_unpacklo_epi8(ar0,gb0),mask0312);
|
|
const __m128i rgba01 = _mm_shuffle_epi8(_mm_unpackhi_epi8(ar0,gb0),mask0312);
|
|
const __m128i rgba10 = _mm_shuffle_epi8(_mm_unpacklo_epi8(ar1,gb1),mask0312);
|
|
const __m128i rgba11 = _mm_shuffle_epi8(_mm_unpackhi_epi8(ar1,gb1),mask0312);
|
|
|
|
__m128i *dst128 = (__m128i*)( dst + (y + 0) * width + x );
|
|
_mm_storeu_si128(dst128, rgba00);
|
|
dst128 = (__m128i*)( dst + (y + 1) * width + x );
|
|
_mm_storeu_si128(dst128, rgba01);
|
|
dst128 = (__m128i*)( dst + (y + 2) * width + x );
|
|
_mm_storeu_si128(dst128, rgba10);
|
|
dst128 = (__m128i*)( dst + (y + 3) * width + x );
|
|
_mm_storeu_si128(dst128, rgba11);
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
// JSD optimized with SSE2 intrinsics
|
|
// Produces a ~68% speed improvement over reference C implementation.
|
|
{
|
|
for (int y = 0; y < height; y += 4)
|
|
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
|
|
{
|
|
// Input is divided up into 16-bit words. The texels are split up into AR and GB components where all
|
|
// AR components come grouped up first in 32 bytes followed by the GB components in 32 bytes. We are
|
|
// processing 16 texels per each loop iteration, numbered from 0-f.
|
|
//
|
|
// Convention is:
|
|
// one byte is [component-name texel-number]
|
|
// __m128i is (4-bytes 4-bytes 4-bytes 4-bytes)
|
|
//
|
|
// Input is ([A 7][R 7][A 6][R 6] [A 5][R 5][A 4][R 4] [A 3][R 3][A 2][R 2] [A 1][R 1][A 0][R 0])
|
|
// ([A f][R f][A e][R e] [A d][R d][A c][R c] [A b][R b][A a][R a] [A 9][R 9][A 8][R 8])
|
|
// ([G 7][B 7][G 6][B 6] [G 5][B 5][G 4][B 4] [G 3][B 3][G 2][B 2] [G 1][B 1][G 0][B 0])
|
|
// ([G f][B f][G e][B e] [G d][B d][G c][B c] [G b][B b][G a][B a] [G 9][B 9][G 8][B 8])
|
|
//
|
|
// Output is (RGBA3 RGBA2 RGBA1 RGBA0)
|
|
// (RGBA7 RGBA6 RGBA5 RGBA4)
|
|
// (RGBAb RGBAa RGBA9 RGBA8)
|
|
// (RGBAf RGBAe RGBAd RGBAc)
|
|
const u8* src2 = src + 64 * yStep;
|
|
// Loads the 1st half of AR components ([A 7][R 7][A 6][R 6] [A 5][R 5][A 4][R 4] [A 3][R 3][A 2][R 2] [A 1][R 1][A 0][R 0])
|
|
const __m128i ar0 = _mm_loadu_si128((__m128i*)src2);
|
|
// Loads the 2nd half of AR components ([A f][R f][A e][R e] [A d][R d][A c][R c] [A b][R b][A a][R a] [A 9][R 9][A 8][R 8])
|
|
const __m128i ar1 = _mm_loadu_si128((__m128i*)src2+1);
|
|
// Loads the 1st half of GB components ([G 7][B 7][G 6][B 6] [G 5][B 5][G 4][B 4] [G 3][B 3][G 2][B 2] [G 1][B 1][G 0][B 0])
|
|
const __m128i gb0 = _mm_loadu_si128((__m128i*)src2+2);
|
|
// Loads the 2nd half of GB components ([G f][B f][G e][B e] [G d][B d][G c][B c] [G b][B b][G a][B a] [G 9][B 9][G 8][B 8])
|
|
const __m128i gb1 = _mm_loadu_si128((__m128i*)src2+3);
|
|
__m128i rgba00, rgba01, rgba10, rgba11;
|
|
const __m128i kMask_x000f = _mm_set_epi32(0x000000FFL, 0x000000FFL, 0x000000FFL, 0x000000FFL);
|
|
const __m128i kMask_xf000 = _mm_set_epi32(0xFF000000L, 0xFF000000L, 0xFF000000L, 0xFF000000L);
|
|
const __m128i kMask_x0ff0 = _mm_set_epi32(0x00FFFF00L, 0x00FFFF00L, 0x00FFFF00L, 0x00FFFF00L);
|
|
// Expand the AR components to fill out 32-bit words:
|
|
// ([A 7][R 7][A 6][R 6] [A 5][R 5][A 4][R 4] [A 3][R 3][A 2][R 2] [A 1][R 1][A 0][R 0]) -> ([A 3][A 3][R 3][R 3] [A 2][A 2][R 2][R 2] [A 1][A 1][R 1][R 1] [A 0][A 0][R 0][R 0])
|
|
const __m128i aarr00 = _mm_unpacklo_epi8(ar0, ar0);
|
|
// ([A 7][R 7][A 6][R 6] [A 5][R 5][A 4][R 4] [A 3][R 3][A 2][R 2] [A 1][R 1][A 0][R 0]) -> ([A 7][A 7][R 7][R 7] [A 6][A 6][R 6][R 6] [A 5][A 5][R 5][R 5] [A 4][A 4][R 4][R 4])
|
|
const __m128i aarr01 = _mm_unpackhi_epi8(ar0, ar0);
|
|
// ([A f][R f][A e][R e] [A d][R d][A c][R c] [A b][R b][A a][R a] [A 9][R 9][A 8][R 8]) -> ([A b][A b][R b][R b] [A a][A a][R a][R a] [A 9][A 9][R 9][R 9] [A 8][A 8][R 8][R 8])
|
|
const __m128i aarr10 = _mm_unpacklo_epi8(ar1, ar1);
|
|
// ([A f][R f][A e][R e] [A d][R d][A c][R c] [A b][R b][A a][R a] [A 9][R 9][A 8][R 8]) -> ([A f][A f][R f][R f] [A e][A e][R e][R e] [A d][A d][R d][R d] [A c][A c][R c][R c])
|
|
const __m128i aarr11 = _mm_unpackhi_epi8(ar1, ar1);
|
|
|
|
// Move A right 16 bits and mask off everything but the lowest 8 bits to get A in its final place:
|
|
const __m128i ___a00 = _mm_and_si128(_mm_srli_epi32(aarr00, 16), kMask_x000f);
|
|
// Move R left 16 bits and mask off everything but the highest 8 bits to get R in its final place:
|
|
const __m128i r___00 = _mm_and_si128(_mm_slli_epi32(aarr00, 16), kMask_xf000);
|
|
// OR the two together to get R and A in their final places:
|
|
const __m128i r__a00 = _mm_or_si128(r___00, ___a00);
|
|
|
|
const __m128i ___a01 = _mm_and_si128(_mm_srli_epi32(aarr01, 16), kMask_x000f);
|
|
const __m128i r___01 = _mm_and_si128(_mm_slli_epi32(aarr01, 16), kMask_xf000);
|
|
const __m128i r__a01 = _mm_or_si128(r___01, ___a01);
|
|
|
|
const __m128i ___a10 = _mm_and_si128(_mm_srli_epi32(aarr10, 16), kMask_x000f);
|
|
const __m128i r___10 = _mm_and_si128(_mm_slli_epi32(aarr10, 16), kMask_xf000);
|
|
const __m128i r__a10 = _mm_or_si128(r___10, ___a10);
|
|
|
|
const __m128i ___a11 = _mm_and_si128(_mm_srli_epi32(aarr11, 16), kMask_x000f);
|
|
const __m128i r___11 = _mm_and_si128(_mm_slli_epi32(aarr11, 16), kMask_xf000);
|
|
const __m128i r__a11 = _mm_or_si128(r___11, ___a11);
|
|
|
|
// Expand the GB components to fill out 32-bit words:
|
|
// ([G 7][B 7][G 6][B 6] [G 5][B 5][G 4][B 4] [G 3][B 3][G 2][B 2] [G 1][B 1][G 0][B 0]) -> ([G 3][G 3][B 3][B 3] [G 2][G 2][B 2][B 2] [G 1][G 1][B 1][B 1] [G 0][G 0][B 0][B 0])
|
|
const __m128i ggbb00 = _mm_unpacklo_epi8(gb0, gb0);
|
|
// ([G 7][B 7][G 6][B 6] [G 5][B 5][G 4][B 4] [G 3][B 3][G 2][B 2] [G 1][B 1][G 0][B 0]) -> ([G 7][G 7][B 7][B 7] [G 6][G 6][B 6][B 6] [G 5][G 5][B 5][B 5] [G 4][G 4][B 4][B 4])
|
|
const __m128i ggbb01 = _mm_unpackhi_epi8(gb0, gb0);
|
|
// ([G f][B f][G e][B e] [G d][B d][G c][B c] [G b][B b][G a][B a] [G 9][B 9][G 8][B 8]) -> ([G b][G b][B b][B b] [G a][G a][B a][B a] [G 9][G 9][B 9][B 9] [G 8][G 8][B 8][B 8])
|
|
const __m128i ggbb10 = _mm_unpacklo_epi8(gb1, gb1);
|
|
// ([G f][B f][G e][B e] [G d][B d][G c][B c] [G b][B b][G a][B a] [G 9][B 9][G 8][B 8]) -> ([G f][G f][B f][B f] [G e][G e][B e][B e] [G d][G d][B d][B d] [G c][G c][B c][B c])
|
|
const __m128i ggbb11 = _mm_unpackhi_epi8(gb1, gb1);
|
|
|
|
// G and B are already in perfect spots in the center, just remove the extra copies in the 1st and 4th positions:
|
|
const __m128i _gb_00 = _mm_and_si128(ggbb00, kMask_x0ff0);
|
|
const __m128i _gb_01 = _mm_and_si128(ggbb01, kMask_x0ff0);
|
|
const __m128i _gb_10 = _mm_and_si128(ggbb10, kMask_x0ff0);
|
|
const __m128i _gb_11 = _mm_and_si128(ggbb11, kMask_x0ff0);
|
|
|
|
// Now join up R__A and _GB_ to get RGBA!
|
|
rgba00 = _mm_or_si128(r__a00, _gb_00);
|
|
rgba01 = _mm_or_si128(r__a01, _gb_01);
|
|
rgba10 = _mm_or_si128(r__a10, _gb_10);
|
|
rgba11 = _mm_or_si128(r__a11, _gb_11);
|
|
// Write em out!
|
|
__m128i *dst128 = (__m128i*)( dst + (y + 0) * width + x );
|
|
_mm_storeu_si128(dst128, rgba00);
|
|
dst128 = (__m128i*)( dst + (y + 1) * width + x );
|
|
_mm_storeu_si128(dst128, rgba01);
|
|
dst128 = (__m128i*)( dst + (y + 2) * width + x );
|
|
_mm_storeu_si128(dst128, rgba10);
|
|
dst128 = (__m128i*)( dst + (y + 3) * width + x );
|
|
_mm_storeu_si128(dst128, rgba11);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case GX_TF_CMPR: // speed critical
|
|
// The metroid games use this format almost exclusively.
|
|
{
|
|
// JSD optimized with SSE2 intrinsics.
|
|
// Produces a ~50% improvement for x86 and a ~40% improvement for x64 in speed over reference C implementation.
|
|
// The x64 compiled reference C code is faster than the x86 compiled reference C code, but the SSE2 is
|
|
// faster than both.
|
|
for (int y = 0; y < height; y += 8)
|
|
{
|
|
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
|
|
{
|
|
// We handle two DXT blocks simultaneously to take full advantage of SSE2's 128-bit registers.
|
|
// This is ideal because a single DXT block contains 2 RGBA colors when decoded from their 16-bit.
|
|
// Two DXT blocks therefore contain 4 RGBA colors to be processed. The processing is parallelizable
|
|
// at this level, so we do.
|
|
for (int z = 0, xStep = 2 * yStep; z < 2; ++z, xStep++)
|
|
{
|
|
// JSD NOTE: You may see many strange patterns of behavior in the below code, but they
|
|
// are for performance reasons. Sometimes, calculating what should be obvious hard-coded
|
|
// constants is faster than loading their values from memory. Unfortunately, there is no
|
|
// way to inline 128-bit constants from opcodes so they must be loaded from memory. This
|
|
// seems a little ridiculous to me in that you can't even generate a constant value of 1 without
|
|
// having to load it from memory. So, I stored the minimal constant I could, 128-bits worth
|
|
// of 1s :). Then I use sequences of shifts to squash it to the appropriate size and bit
|
|
// positions that I need.
|
|
|
|
const __m128i allFFs128 = _mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128());
|
|
|
|
// Load 128 bits, i.e. two DXTBlocks (64-bits each)
|
|
const __m128i dxt = _mm_loadu_si128((__m128i *)(src + sizeof(struct DXTBlock) * 2 * xStep));
|
|
|
|
// Copy the 2-bit indices from each DXT block:
|
|
alignas(16) u32 dxttmp[4];
|
|
_mm_store_si128((__m128i*)dxttmp, dxt);
|
|
|
|
u32 dxt0sel = dxttmp[1];
|
|
u32 dxt1sel = dxttmp[3];
|
|
|
|
__m128i argb888x4;
|
|
__m128i c1 = _mm_unpackhi_epi16(dxt, dxt);
|
|
c1 = _mm_slli_si128(c1, 8);
|
|
const __m128i c0 = _mm_or_si128(c1, _mm_srli_si128(_mm_slli_si128(_mm_unpacklo_epi16(dxt, dxt), 8), 8));
|
|
|
|
// Compare rgb0 to rgb1:
|
|
// Each 32-bit word will contain either 0xFFFFFFFF or 0x00000000 for true/false.
|
|
const __m128i c0cmp = _mm_srli_epi32(_mm_slli_epi32(_mm_srli_epi64(c0, 8), 16), 16);
|
|
const __m128i c0shr = _mm_srli_epi64(c0cmp, 32);
|
|
const __m128i cmprgb0rgb1 = _mm_cmpgt_epi32(c0cmp, c0shr);
|
|
|
|
int cmp0 = _mm_extract_epi16(cmprgb0rgb1, 0);
|
|
int cmp1 = _mm_extract_epi16(cmprgb0rgb1, 4);
|
|
|
|
// green:
|
|
// NOTE: We start with the larger number of bits (6) firts for G and shift the mask down 1 bit to get a 5-bit mask
|
|
// later for R and B components.
|
|
// low6mask == _mm_set_epi32(0x0000FC00, 0x0000FC00, 0x0000FC00, 0x0000FC00)
|
|
const __m128i low6mask = _mm_slli_epi32( _mm_srli_epi32(allFFs128, 24 + 2), 8 + 2);
|
|
const __m128i gtmp = _mm_srli_epi32(c0, 3);
|
|
const __m128i g0 = _mm_and_si128(gtmp, low6mask);
|
|
// low3mask == _mm_set_epi32(0x00000300, 0x00000300, 0x00000300, 0x00000300)
|
|
const __m128i g1 = _mm_and_si128(_mm_srli_epi32(gtmp, 6), _mm_set_epi32(0x00000300, 0x00000300, 0x00000300, 0x00000300));
|
|
argb888x4 = _mm_or_si128(g0, g1);
|
|
// red:
|
|
// low5mask == _mm_set_epi32(0x000000F8, 0x000000F8, 0x000000F8, 0x000000F8)
|
|
const __m128i low5mask = _mm_slli_epi32( _mm_srli_epi32(low6mask, 8 + 3), 3);
|
|
const __m128i r0 = _mm_and_si128(c0, low5mask);
|
|
const __m128i r1 = _mm_srli_epi32(r0, 5);
|
|
argb888x4 = _mm_or_si128(argb888x4, _mm_or_si128(r0, r1));
|
|
// blue:
|
|
// _mm_slli_epi32(low5mask, 16) == _mm_set_epi32(0x00F80000, 0x00F80000, 0x00F80000, 0x00F80000)
|
|
const __m128i b0 = _mm_and_si128(_mm_srli_epi32(c0, 5), _mm_slli_epi32(low5mask, 16));
|
|
const __m128i b1 = _mm_srli_epi16(b0, 5);
|
|
// OR in the fixed alpha component
|
|
// _mm_slli_epi32( allFFs128, 24 ) == _mm_set_epi32(0xFF000000, 0xFF000000, 0xFF000000, 0xFF000000)
|
|
argb888x4 = _mm_or_si128(_mm_or_si128(argb888x4, _mm_slli_epi32( allFFs128, 24 ) ), _mm_or_si128(b0, b1));
|
|
// calculate RGB2 and RGB3:
|
|
const __m128i rgb0 = _mm_shuffle_epi32(argb888x4, _MM_SHUFFLE(2, 2, 0, 0));
|
|
const __m128i rgb1 = _mm_shuffle_epi32(argb888x4, _MM_SHUFFLE(3, 3, 1, 1));
|
|
const __m128i rrggbb0 = _mm_and_si128(_mm_unpacklo_epi8(rgb0, rgb0), _mm_srli_epi16( allFFs128, 8 ));
|
|
const __m128i rrggbb1 = _mm_and_si128(_mm_unpacklo_epi8(rgb1, rgb1), _mm_srli_epi16( allFFs128, 8 ));
|
|
const __m128i rrggbb01 = _mm_and_si128(_mm_unpackhi_epi8(rgb0, rgb0), _mm_srli_epi16( allFFs128, 8 ));
|
|
const __m128i rrggbb11 = _mm_and_si128(_mm_unpackhi_epi8(rgb1, rgb1), _mm_srli_epi16( allFFs128, 8 ));
|
|
|
|
__m128i rgb2, rgb3;
|
|
|
|
// if (rgb0 > rgb1):
|
|
if (cmp0 != 0)
|
|
{
|
|
// RGB2a = ((RGB1 - RGB0) >> 1) - ((RGB1 - RGB0) >> 3) using arithmetic shifts to extend sign (not logical shifts)
|
|
const __m128i rrggbbsub = _mm_subs_epi16(rrggbb1, rrggbb0);
|
|
const __m128i rrggbbsubshr1 = _mm_srai_epi16(rrggbbsub, 1);
|
|
const __m128i rrggbbsubshr3 = _mm_srai_epi16(rrggbbsub, 3);
|
|
const __m128i shr1subshr3 = _mm_sub_epi16(rrggbbsubshr1, rrggbbsubshr3);
|
|
// low8mask16 == _mm_set_epi16(0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff)
|
|
const __m128i low8mask16 = _mm_srli_epi16( allFFs128, 8 );
|
|
const __m128i rrggbbdelta = _mm_and_si128(shr1subshr3, low8mask16);
|
|
const __m128i rgbdeltadup = _mm_packus_epi16(rrggbbdelta, rrggbbdelta);
|
|
const __m128i rgbdelta = _mm_srli_si128(_mm_slli_si128(rgbdeltadup, 8), 8);
|
|
|
|
rgb2 = _mm_and_si128(_mm_add_epi8(rgb0, rgbdelta), _mm_srli_si128(allFFs128, 8));
|
|
rgb3 = _mm_and_si128(_mm_sub_epi8(rgb1, rgbdelta), _mm_srli_si128(allFFs128, 8));
|
|
}
|
|
else
|
|
{
|
|
// RGB2b = avg(RGB0, RGB1)
|
|
const __m128i rrggbb21 = _mm_avg_epu16(rrggbb0, rrggbb1);
|
|
const __m128i rgb210 = _mm_srli_si128(_mm_packus_epi16(rrggbb21, rrggbb21), 8);
|
|
rgb2 = rgb210;
|
|
rgb3 = _mm_and_si128(_mm_srli_si128(_mm_shuffle_epi32(argb888x4, _MM_SHUFFLE(1, 1, 1, 1)), 8), _mm_srli_epi32( allFFs128, 8 ));
|
|
}
|
|
|
|
// if (rgb0 > rgb1):
|
|
if (cmp1 != 0)
|
|
{
|
|
// RGB2a = ((RGB1 - RGB0) >> 1) - ((RGB1 - RGB0) >> 3) using arithmetic shifts to extend sign (not logical shifts)
|
|
const __m128i rrggbbsub1 = _mm_subs_epi16(rrggbb11, rrggbb01);
|
|
const __m128i rrggbbsubshr11 = _mm_srai_epi16(rrggbbsub1, 1);
|
|
const __m128i rrggbbsubshr31 = _mm_srai_epi16(rrggbbsub1, 3);
|
|
const __m128i shr1subshr31 = _mm_sub_epi16(rrggbbsubshr11, rrggbbsubshr31);
|
|
// low8mask16 == _mm_set_epi16(0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff)
|
|
const __m128i low8mask16 = _mm_srli_epi16( allFFs128, 8 );
|
|
const __m128i rrggbbdelta1 = _mm_and_si128(shr1subshr31, low8mask16);
|
|
__m128i rgbdelta1 = _mm_packus_epi16(rrggbbdelta1, rrggbbdelta1);
|
|
rgbdelta1 = _mm_slli_si128(rgbdelta1, 8);
|
|
|
|
rgb2 = _mm_or_si128(rgb2, _mm_and_si128(_mm_add_epi8(rgb0, rgbdelta1), _mm_slli_si128(allFFs128, 8)));
|
|
rgb3 = _mm_or_si128(rgb3, _mm_and_si128(_mm_sub_epi8(rgb1, rgbdelta1), _mm_slli_si128(allFFs128, 8)));
|
|
}
|
|
else
|
|
{
|
|
// RGB2b = avg(RGB0, RGB1)
|
|
const __m128i rrggbb211 = _mm_avg_epu16(rrggbb01, rrggbb11);
|
|
const __m128i rgb211 = _mm_slli_si128(_mm_packus_epi16(rrggbb211, rrggbb211), 8);
|
|
rgb2 = _mm_or_si128(rgb2, rgb211);
|
|
|
|
// _mm_srli_epi32( allFFs128, 8 ) == _mm_set_epi32(0x00FFFFFF, 0x00FFFFFF, 0x00FFFFFF, 0x00FFFFFF)
|
|
// Make this color fully transparent:
|
|
rgb3 = _mm_or_si128(rgb3, _mm_and_si128(_mm_and_si128(rgb1, _mm_srli_epi32( allFFs128, 8 ) ), _mm_slli_si128(allFFs128, 8)));
|
|
}
|
|
|
|
// Create an array for color lookups for DXT0 so we can use the 2-bit indices:
|
|
const __m128i mmcolors0 = _mm_or_si128(
|
|
_mm_or_si128(
|
|
_mm_srli_si128(_mm_slli_si128(argb888x4, 8), 8),
|
|
_mm_slli_si128(_mm_srli_si128(_mm_slli_si128(rgb2, 8), 8 + 4), 8)
|
|
),
|
|
_mm_slli_si128(_mm_srli_si128(rgb3, 4), 8 + 4)
|
|
);
|
|
|
|
// Create an array for color lookups for DXT1 so we can use the 2-bit indices:
|
|
const __m128i mmcolors1 = _mm_or_si128(
|
|
_mm_or_si128(
|
|
_mm_srli_si128(argb888x4, 8),
|
|
_mm_slli_si128(_mm_srli_si128(rgb2, 8 + 4), 8)
|
|
),
|
|
_mm_slli_si128(_mm_srli_si128(rgb3, 8 + 4), 8 + 4)
|
|
);
|
|
|
|
// The #ifdef CHECKs here and below are to compare correctness of output against the reference code.
|
|
// Don't use them in a normal build.
|
|
#ifdef CHECK
|
|
// REFERENCE:
|
|
u32 tmp0[4][4], tmp1[4][4];
|
|
|
|
DecodeDXTBlock(&(tmp0[0][0]), (const DXTBlock *)src, 4);
|
|
DecodeDXTBlock(&(tmp1[0][0]), (const DXTBlock *)(src + 8), 4);
|
|
#endif
|
|
|
|
u32 *dst32 = ( dst + (y + z*4) * width + x );
|
|
|
|
// Copy the colors here:
|
|
alignas(16) u32 colors0[4];
|
|
alignas(16) u32 colors1[4];
|
|
_mm_store_si128((__m128i*)colors0, mmcolors0);
|
|
_mm_store_si128((__m128i*)colors1, mmcolors1);
|
|
|
|
// Row 0:
|
|
dst32[(width * 0) + 0] = colors0[(dxt0sel >> ((0*8)+6)) & 3];
|
|
dst32[(width * 0) + 1] = colors0[(dxt0sel >> ((0*8)+4)) & 3];
|
|
dst32[(width * 0) + 2] = colors0[(dxt0sel >> ((0*8)+2)) & 3];
|
|
dst32[(width * 0) + 3] = colors0[(dxt0sel >> ((0*8)+0)) & 3];
|
|
dst32[(width * 0) + 4] = colors1[(dxt1sel >> ((0*8)+6)) & 3];
|
|
dst32[(width * 0) + 5] = colors1[(dxt1sel >> ((0*8)+4)) & 3];
|
|
dst32[(width * 0) + 6] = colors1[(dxt1sel >> ((0*8)+2)) & 3];
|
|
dst32[(width * 0) + 7] = colors1[(dxt1sel >> ((0*8)+0)) & 3];
|
|
#ifdef CHECK
|
|
assert( memcmp(&(tmp0[0]), &dst32[(width * 0)], 16) == 0 );
|
|
assert( memcmp(&(tmp1[0]), &dst32[(width * 0) + 4], 16) == 0 );
|
|
#endif
|
|
// Row 1:
|
|
dst32[(width * 1) + 0] = colors0[(dxt0sel >> ((1*8)+6)) & 3];
|
|
dst32[(width * 1) + 1] = colors0[(dxt0sel >> ((1*8)+4)) & 3];
|
|
dst32[(width * 1) + 2] = colors0[(dxt0sel >> ((1*8)+2)) & 3];
|
|
dst32[(width * 1) + 3] = colors0[(dxt0sel >> ((1*8)+0)) & 3];
|
|
dst32[(width * 1) + 4] = colors1[(dxt1sel >> ((1*8)+6)) & 3];
|
|
dst32[(width * 1) + 5] = colors1[(dxt1sel >> ((1*8)+4)) & 3];
|
|
dst32[(width * 1) + 6] = colors1[(dxt1sel >> ((1*8)+2)) & 3];
|
|
dst32[(width * 1) + 7] = colors1[(dxt1sel >> ((1*8)+0)) & 3];
|
|
#ifdef CHECK
|
|
assert( memcmp(&(tmp0[1]), &dst32[(width * 1)], 16) == 0 );
|
|
assert( memcmp(&(tmp1[1]), &dst32[(width * 1) + 4], 16) == 0 );
|
|
#endif
|
|
// Row 2:
|
|
dst32[(width * 2) + 0] = colors0[(dxt0sel >> ((2*8)+6)) & 3];
|
|
dst32[(width * 2) + 1] = colors0[(dxt0sel >> ((2*8)+4)) & 3];
|
|
dst32[(width * 2) + 2] = colors0[(dxt0sel >> ((2*8)+2)) & 3];
|
|
dst32[(width * 2) + 3] = colors0[(dxt0sel >> ((2*8)+0)) & 3];
|
|
dst32[(width * 2) + 4] = colors1[(dxt1sel >> ((2*8)+6)) & 3];
|
|
dst32[(width * 2) + 5] = colors1[(dxt1sel >> ((2*8)+4)) & 3];
|
|
dst32[(width * 2) + 6] = colors1[(dxt1sel >> ((2*8)+2)) & 3];
|
|
dst32[(width * 2) + 7] = colors1[(dxt1sel >> ((2*8)+0)) & 3];
|
|
#ifdef CHECK
|
|
assert( memcmp(&(tmp0[2]), &dst32[(width * 2)], 16) == 0 );
|
|
assert( memcmp(&(tmp1[2]), &dst32[(width * 2) + 4], 16) == 0 );
|
|
#endif
|
|
// Row 3:
|
|
dst32[(width * 3) + 0] = colors0[(dxt0sel >> ((3*8)+6)) & 3];
|
|
dst32[(width * 3) + 1] = colors0[(dxt0sel >> ((3*8)+4)) & 3];
|
|
dst32[(width * 3) + 2] = colors0[(dxt0sel >> ((3*8)+2)) & 3];
|
|
dst32[(width * 3) + 3] = colors0[(dxt0sel >> ((3*8)+0)) & 3];
|
|
dst32[(width * 3) + 4] = colors1[(dxt1sel >> ((3*8)+6)) & 3];
|
|
dst32[(width * 3) + 5] = colors1[(dxt1sel >> ((3*8)+4)) & 3];
|
|
dst32[(width * 3) + 6] = colors1[(dxt1sel >> ((3*8)+2)) & 3];
|
|
dst32[(width * 3) + 7] = colors1[(dxt1sel >> ((3*8)+0)) & 3];
|
|
#ifdef CHECK
|
|
assert( memcmp(&(tmp0[3]), &dst32[(width * 3)], 16) == 0 );
|
|
assert( memcmp(&(tmp1[3]), &dst32[(width * 3) + 4], 16) == 0 );
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|