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[Shader interpreter] Add LG2/EX2

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wheremyfoodat 2023-07-01 02:17:19 +03:00
parent 005db316cf
commit 7d56af26af
2 changed files with 71 additions and 0 deletions
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5
include/PICA/shader.hpp
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@ -30,6 +30,8 @@ namespace ShaderOpcodes {
RSQ = 0x0F,
MOVA = 0x12,
MOV = 0x13,
DPHI = 0x18,
DSTI = 0x19,
SGEI = 0x1A,
SLTI = 0x1B,
NOP = 0x21,
@ -137,11 +139,14 @@ private:
void cmp(u32 instruction);
void dp3(u32 instruction);
void dp4(u32 instruction);
void dphi(u32 instruction);
void ex2(u32 instruction);
void flr(u32 instruction);
void ifc(u32 instruction);
void ifu(u32 instruction);
void jmpc(u32 instruction);
void jmpu(u32 instruction);
void lg2(u32 instruction);
void loop(u32 instruction);
void mad(u32 instruction);
void madi(u32 instruction);

66
src/core/PICA/shader_interpreter.cpp
View file

@ -23,12 +23,15 @@ void PICAShader::run() {
break;
case ShaderOpcodes::DP3: dp3(instruction); break;
case ShaderOpcodes::DP4: dp4(instruction); break;
case ShaderOpcodes::DPHI: dphi(instruction); break;
case ShaderOpcodes::END: return; // Stop running shader
case ShaderOpcodes::EX2: ex2(instruction); break;
case ShaderOpcodes::FLR: flr(instruction); break;
case ShaderOpcodes::IFC: ifc(instruction); break;
case ShaderOpcodes::IFU: ifu(instruction); break;
case ShaderOpcodes::JMPC: jmpc(instruction); break;
case ShaderOpcodes::JMPU: jmpu(instruction); break;
case ShaderOpcodes::LG2: lg2(instruction); break;
case ShaderOpcodes::LOOP: loop(instruction); break;
case ShaderOpcodes::MAX: max(instruction); break;
case ShaderOpcodes::MIN: min(instruction); break;
@ -325,6 +328,29 @@ void PICAShader::dp4(u32 instruction) {
}
}
void PICAShader::dphi(u32 instruction) {
const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
const u32 src1 = getBits<14, 5>(instruction);
u32 src2 = getBits<7, 7>(instruction);
const u32 idx = getBits<19, 2>(instruction);
const u32 dest = getBits<21, 5>(instruction);
src2 = getIndexedSource(src2, idx);
vec4f srcVec1 = getSourceSwizzled<1>(src1, operandDescriptor);
vec4f srcVec2 = getSourceSwizzled<2>(src2, operandDescriptor);
vec4f& destVector = getDest(dest);
// srcVec1[3] is supposed to be replaced with 1.0 in the dot product, so we just add srcVec2[3] without multiplying it with anything
f24 dot = srcVec1[0] * srcVec2[0] + srcVec1[1] * srcVec2[1] + srcVec1[2] * srcVec2[2] + srcVec2[3];
u32 componentMask = operandDescriptor & 0xf;
for (int i = 0; i < 4; i++) {
if (componentMask & (1 << i)) {
destVector[3 - i] = dot;
}
}
}
void PICAShader::rcp(u32 instruction) {
const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
const u32 src1 = getBits<12, 7>(instruction);
@ -365,6 +391,46 @@ void PICAShader::rsq(u32 instruction) {
}
}
void PICAShader::ex2(u32 instruction) {
const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
u32 src = getBits<12, 7>(instruction);
const u32 idx = getBits<19, 2>(instruction);
const u32 dest = getBits<21, 5>(instruction);
src = getIndexedSource(src, idx);
vec4f srcVec = getSourceSwizzled<1>(src, operandDescriptor);
vec4f& destVector = getDest(dest);
f24 res = f24::fromFloat32(std::exp2(srcVec[0].toFloat32()));
u32 componentMask = operandDescriptor & 0xf;
for (int i = 0; i < 4; i++) {
if (componentMask & (1 << i)) {
destVector[3 - i] = res;
}
}
}
void PICAShader::lg2(u32 instruction) {
const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
u32 src = getBits<12, 7>(instruction);
const u32 idx = getBits<19, 2>(instruction);
const u32 dest = getBits<21, 5>(instruction);
src = getIndexedSource(src, idx);
vec4f srcVec = getSourceSwizzled<1>(src, operandDescriptor);
vec4f& destVector = getDest(dest);
f24 res = f24::fromFloat32(std::log2(srcVec[0].toFloat32()));
u32 componentMask = operandDescriptor & 0xf;
for (int i = 0; i < 4; i++) {
if (componentMask & (1 << i)) {
destVector[3 - i] = res;
}
}
}
void PICAShader::mad(u32 instruction) {
const u32 operandDescriptor = operandDescriptors[instruction & 0x1f];
const u32 src1 = getBits<17, 5>(instruction);