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[PICA] Implement mul

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wheremyfoodat 2022-09-24 03:11:36 +03:00
parent f22d389591
commit 61212c9341
2 changed files with 24 additions and 0 deletions
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2
include/PICA/shader.hpp
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@ -14,6 +14,7 @@ namespace ShaderOpcodes {
enum : u32 {
ADD = 0x00,
DP4 = 0x02,
MUL = 0x08,
MOV = 0x13,
END = 0x22
};
@ -41,6 +42,7 @@ class PICAShader {
void add(u32 instruction);
void dp4(u32 instruction);
void mov(u32 instruction);
void mul(u32 instruction);
// src1, src2 and src3 have different negation & component swizzle bits in the operand descriptor
// https://problemkaputt.github.io/gbatek.htm#3dsgpushaderinstructionsetopcodesummary in the

22
src/core/PICA/shader_interpreter.cpp
View file

@ -12,6 +12,7 @@ void PICAShader::run() {
case ShaderOpcodes::DP4: dp4(instruction); break;
case ShaderOpcodes::END: return; // Stop running shader
case ShaderOpcodes::MOV: mov(instruction); break;
case ShaderOpcodes::MUL: mul(instruction); break;
default:Helpers::panic("Unimplemented PICA instruction %08X (Opcode = %02X)", instruction, opcode);
}
}
@ -58,6 +59,27 @@ void PICAShader::add(u32 instruction) {
}
}
void PICAShader::mul(u32 instruction) {
const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
const u32 src1 = (instruction >> 12) & 0x7f;
const u32 src2 = (instruction >> 7) & 0x1f; // src2 coming first because PICA moment
const u32 idx = (instruction >> 19) & 3;
const u32 dest = (instruction >> 21) & 0x1f;
if (idx) Helpers::panic("[PICA] MUL: idx != 0");
vec4f srcVec1 = getSourceSwizzled<1>(src1, operandDescriptor);
vec4f srcVec2 = getSourceSwizzled<2>(src2, operandDescriptor);
vec4f& destVector = getDest(dest);
u32 componentMask = operandDescriptor & 0xf;
for (int i = 0; i < 4; i++) {
if (componentMask & (1 << i)) {
destVector[3 - i] = srcVec1[3 - i] * srcVec2[3 - 1];
}
}
}
void PICAShader::mov(u32 instruction) {
const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
const u32 src = (instruction >> 12) & 0x7f;