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Merge pull request #470 from archshift/master

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Pica/VertexShader: Implement JMPC/JMPU/CALLC/CALLU.
This commit is contained in:
bunnei 2015-01-12 21:45:38 -05:00
commit 65c12d2430
2 changed files with 53 additions and 24 deletions
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75
src/video_core/vertex_shader.cpp
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@ -349,12 +349,44 @@ static void ProcessShaderCode(VertexShaderState& state) {
break;
}
default:
{
static auto evaluate_condition = [](const VertexShaderState& state, bool refx, bool refy, Instruction::FlowControlType flow_control) {
bool results[2] = { refx == state.conditional_code[0],
refy == state.conditional_code[1] };
switch (flow_control.op) {
case flow_control.Or:
return results[0] || results[1];
case flow_control.And:
return results[0] && results[1];
case flow_control.JustX:
return results[0];
case flow_control.JustY:
return results[1];
}
};
// Handle each instruction on its own
switch (instr.opcode) {
case Instruction::OpCode::END:
exit_loop = true;
break;
case Instruction::OpCode::JMPC:
if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) {
state.program_counter = &shader_memory[instr.flow_control.dest_offset] - 1;
}
break;
case Instruction::OpCode::JMPU:
if (shader_uniforms.b[instr.flow_control.bool_uniform_id]) {
state.program_counter = &shader_memory[instr.flow_control.dest_offset] - 1;
}
break;
case Instruction::OpCode::CALL:
call(state,
instr.flow_control.dest_offset,
@ -362,6 +394,24 @@ static void ProcessShaderCode(VertexShaderState& state) {
binary_offset + 1);
break;
case Instruction::OpCode::CALLU:
if (shader_uniforms.b[instr.flow_control.bool_uniform_id]) {
call(state,
instr.flow_control.dest_offset,
instr.flow_control.num_instructions,
binary_offset + 1);
}
break;
case Instruction::OpCode::CALLC:
if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) {
call(state,
instr.flow_control.dest_offset,
instr.flow_control.num_instructions,
binary_offset + 1);
}
break;
case Instruction::OpCode::NOP:
break;
@ -384,29 +434,7 @@ static void ProcessShaderCode(VertexShaderState& state) {
{
// TODO: Do we need to consider swizzlers here?
auto flow_control = instr.flow_control;
bool results[3] = { (bool)flow_control.refx == state.conditional_code[0],
(bool)flow_control.refy == state.conditional_code[1] };
switch (flow_control.op) {
case flow_control.Or:
results[2] = results[0] || results[1];
break;
case flow_control.And:
results[2] = results[0] && results[1];
break;
case flow_control.JustX:
results[2] = results[0];
break;
case flow_control.JustY:
results[2] = results[1];
break;
}
if (results[2]) {
if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) {
call(state,
binary_offset + 1,
instr.flow_control.dest_offset - binary_offset - 1,
@ -429,6 +457,7 @@ static void ProcessShaderCode(VertexShaderState& state) {
break;
}
}
++state.program_counter;