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MDEC: Vectorize 16 and 24-bit copy-out

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Speedup of 15% and 6% in FMV playback respectively.
This commit is contained in:
Stenzek 2024-09-02 17:57:26 +10:00
parent f511877910
commit 23fa3776ec
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2 changed files with 73 additions and 1 deletions
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2
src/common/intrin.h
View file

@ -11,6 +11,7 @@
#include <type_traits>
#if defined(CPU_ARCH_X86) || defined(CPU_ARCH_X64)
#define CPU_ARCH_SIMD 1
#define CPU_ARCH_SSE 1
#include <emmintrin.h>
#include <tmmintrin.h>
@ -28,6 +29,7 @@
#define CPU_ARCH_SSE41 1
#endif
#elif defined(CPU_ARCH_ARM32) || defined(CPU_ARCH_ARM64)
#define CPU_ARCH_SIMD 1
#define CPU_ARCH_NEON 1
#if defined(_MSC_VER) && !defined(__clang__)
#include <arm64_neon.h>

72
src/core/mdec.cpp
View file

@ -149,7 +149,7 @@ struct MDECState
u32 current_coefficient = 64; // k (in block)
u16 current_q_scale = 0;
alignas(16) std::array<u32, 256> block_rgb{};
alignas(VECTOR_ALIGNMENT) std::array<u32, 256> block_rgb{};
TimingEvent block_copy_out_event{"MDEC Block Copy Out", 1, 1, &MDEC::CopyOutBlock, nullptr};
u32 total_blocks_decoded = 0;
@ -624,6 +624,7 @@ void MDEC::CopyOutBlock(void* param, TickCount ticks, TickCount ticks_late)
switch (s_state.status.data_output_depth)
{
// Not worth vectorizing these, they're basically never used.
case DataOutputDepth_4Bit:
{
const u32* in_ptr = s_state.block_rgb.data();
@ -658,6 +659,7 @@ void MDEC::CopyOutBlock(void* param, TickCount ticks, TickCount ticks_late)
case DataOutputDepth_24Bit:
{
#ifndef CPU_ARCH_SIMD
// pack tightly
u32 index = 0;
u32 state = 0;
@ -692,6 +694,36 @@ void MDEC::CopyOutBlock(void* param, TickCount ticks, TickCount ticks_late)
break;
}
}
#else
static constexpr GSVector4i mask00 = GSVector4i::cxpr8(0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14, -1, -1, -1, -1);
static constexpr GSVector4i mask01 =
GSVector4i::cxpr8(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 4);
static constexpr GSVector4i mask11 =
GSVector4i::cxpr8(5, 6, 8, 9, 10, 12, 13, 14, -1, -1, -1, -1, -1, -1, -1, -1);
static constexpr GSVector4i mask12 = GSVector4i::cxpr8(-1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 4, 5, 6, 8, 9);
static constexpr GSVector4i mask22 =
GSVector4i::cxpr8(10, 12, 13, 14, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
static constexpr GSVector4i mask23 = GSVector4i::cxpr8(-1, -1, -1, -1, 0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14);
// This is really awful, but the FIFO sucks...
alignas(VECTOR_ALIGNMENT) u32 rgb[256 * 3 / 4];
u32* rgbp = rgb;
for (u32 index = 0; index < s_state.block_rgb.size(); index += 16)
{
const GSVector4i rgbx0 = GSVector4i::load<false>(&s_state.block_rgb[index]);
const GSVector4i rgbx1 = GSVector4i::load<false>(&s_state.block_rgb[index + 4]);
const GSVector4i rgbx2 = GSVector4i::load<false>(&s_state.block_rgb[index + 8]);
const GSVector4i rgbx3 = GSVector4i::load<false>(&s_state.block_rgb[index + 12]);
GSVector4i::store<true>(&rgbp[0], rgbx0.shuffle8(mask00) | rgbx1.shuffle8(mask01));
GSVector4i::store<true>(&rgbp[4], rgbx1.shuffle8(mask11) | rgbx2.shuffle8(mask12));
GSVector4i::store<true>(&rgbp[8], rgbx2.shuffle8(mask22) | rgbx3.shuffle8(mask23));
rgbp += 12;
}
s_state.data_out_fifo.PushRange(rgb, std::size(rgb));
#endif
break;
}
@ -719,6 +751,7 @@ void MDEC::CopyOutBlock(void* param, TickCount ticks, TickCount ticks_late)
}
else
{
#ifndef CPU_ARCH_SIMD
const u32 a = ZeroExtend32(s_state.status.data_output_bit15.GetValue()) << 15;
for (u32 i = 0; i < static_cast<u32>(s_state.block_rgb.size());)
{
@ -738,6 +771,43 @@ void MDEC::CopyOutBlock(void* param, TickCount ticks, TickCount ticks_late)
s_state.data_out_fifo.Push(color15a | (color15b << 16));
}
#else
// This is really awful, but the FIFO sucks...
alignas(VECTOR_ALIGNMENT) u32 rgb[256 / 2];
u32* rgbp = rgb;
const GSVector4i a = s_state.status.data_output_bit15 ? GSVector4i::cxpr(0x8000u) : GSVector4i::cxpr(0);
for (u32 i = 0; i < static_cast<u32>(s_state.block_rgb.size()); i += 8)
{
GSVector4i rgb0 = GSVector4i::load<true>(&s_state.block_rgb[i]);
GSVector4i rgb1 = GSVector4i::load<true>(&s_state.block_rgb[i + 4]);
static constexpr auto rgb32_to_rgba5551 = [](const GSVector4i& rgb32, const GSVector4i& a) {
const GSVector4i r =
(rgb32 & GSVector4i::cxpr(0xff)).add32(GSVector4i::cxpr(4)).srl32(3).min_u32(GSVector4i::cxpr(0x1F));
const GSVector4i g = (rgb32.srl32<8>() & GSVector4i::cxpr(0xff))
.add32(GSVector4i::cxpr(4))
.srl32(3)
.min_u32(GSVector4i::cxpr(0x1F))
.sll32<5>();
const GSVector4i b = (rgb32.srl32<16>() & GSVector4i::cxpr(0xff))
.add32(GSVector4i::cxpr(4))
.srl32(3)
.min_u32(GSVector4i::cxpr(0x1F))
.sll32<10>();
return (r | g | b | a);
};
rgb0 = rgb32_to_rgba5551(rgb0, a);
rgb1 = rgb32_to_rgba5551(rgb1, a);
const GSVector4i packed_rgb0_rb1 = rgb0.pu32(rgb1);
GSVector4i::store<true>(rgbp, packed_rgb0_rb1);
rgbp += sizeof(GSVector4i) / sizeof(u32);
}
s_state.data_out_fifo.PushRange(rgb, std::size(rgb));
#endif
}
}
break;