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Merge pull request #478 from archshift/pp3ports4 

Pica/VertexShader: Implement the MAD instruction.
This commit is contained in:
bunnei 2015-01-12 21:55:35 -05:00
parent 65c12d2430 e02db3904b
commit 99c0716d4d
1 changed files with 69 additions and 0 deletions
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69
src/video_core/vertex_shader.cpp
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@ -348,6 +348,75 @@ static void ProcessShaderCode(VertexShaderState& state) {
break;
}
case Instruction::OpCodeType::MultiplyAdd:
{
if (instr.opcode.EffectiveOpCode() == Instruction::OpCode::MAD) {
const SwizzlePattern& swizzle = *(SwizzlePattern*)&swizzle_data[instr.mad.operand_desc_id];
const float24* src1_ = LookupSourceRegister(instr.mad.src1);
const float24* src2_ = LookupSourceRegister(instr.mad.src2);
const float24* src3_ = LookupSourceRegister(instr.mad.src3);
const bool negate_src1 = ((bool)swizzle.negate_src1 != false);
const bool negate_src2 = ((bool)swizzle.negate_src2 != false);
const bool negate_src3 = ((bool)swizzle.negate_src3 != false);
float24 src1[4] = {
src1_[(int)swizzle.GetSelectorSrc1(0)],
src1_[(int)swizzle.GetSelectorSrc1(1)],
src1_[(int)swizzle.GetSelectorSrc1(2)],
src1_[(int)swizzle.GetSelectorSrc1(3)],
};
if (negate_src1) {
src1[0] = src1[0] * float24::FromFloat32(-1);
src1[1] = src1[1] * float24::FromFloat32(-1);
src1[2] = src1[2] * float24::FromFloat32(-1);
src1[3] = src1[3] * float24::FromFloat32(-1);
}
float24 src2[4] = {
src2_[(int)swizzle.GetSelectorSrc2(0)],
src2_[(int)swizzle.GetSelectorSrc2(1)],
src2_[(int)swizzle.GetSelectorSrc2(2)],
src2_[(int)swizzle.GetSelectorSrc2(3)],
};
if (negate_src2) {
src2[0] = src2[0] * float24::FromFloat32(-1);
src2[1] = src2[1] * float24::FromFloat32(-1);
src2[2] = src2[2] * float24::FromFloat32(-1);
src2[3] = src2[3] * float24::FromFloat32(-1);
}
float24 src3[4] = {
src3_[(int)swizzle.GetSelectorSrc3(0)],
src3_[(int)swizzle.GetSelectorSrc3(1)],
src3_[(int)swizzle.GetSelectorSrc3(2)],
src3_[(int)swizzle.GetSelectorSrc3(3)],
};
if (negate_src3) {
src3[0] = src3[0] * float24::FromFloat32(-1);
src3[1] = src3[1] * float24::FromFloat32(-1);
src3[2] = src3[2] * float24::FromFloat32(-1);
src3[3] = src3[3] * float24::FromFloat32(-1);
}
float24* dest = (instr.mad.dest < 0x08) ? state.output_register_table[4*instr.mad.dest.GetIndex()]
: (instr.mad.dest < 0x10) ? dummy_vec4_float24
: (instr.mad.dest < 0x20) ? &state.temporary_registers[instr.mad.dest.GetIndex()][0]
: dummy_vec4_float24;
for (int i = 0; i < 4; ++i) {
if (!swizzle.DestComponentEnabled(i))
continue;
dest[i] = src1[i] * src2[i] + src3[i];
}
} else {
LOG_ERROR(HW_GPU, "Unhandled multiply-add instruction: 0x%02x (%s): 0x%08x",
(int)instr.opcode.Value(), instr.opcode.GetInfo().name, instr.hex);
}
break;
}
default:
{
static auto evaluate_condition = [](const VertexShaderState& state, bool refx, bool refy, Instruction::FlowControlType flow_control) {