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recompiler: proper VS inputs initialization

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This commit is contained in:
psucien 2024-07-12 18:12:06 +02:00
parent a75851f7e2
commit 1b94f07a6a
6 changed files with 32 additions and 8 deletions
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16
src/shader_recompiler/frontend/translate/translate.cpp
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@ -35,10 +35,20 @@ void Translator::EmitPrologue() {
IR::VectorReg dst_vreg = IR::VectorReg::V0;
switch (info.stage) {
case Stage::Vertex:
// https://github.com/chaotic-cx/mesa-mirror/blob/72326e15/src/amd/vulkan/radv_shader_args.c#L146C1-L146C23
// v0: vertex ID, always present
ir.SetVectorReg(dst_vreg++, ir.GetAttributeU32(IR::Attribute::VertexId));
ir.SetVectorReg(dst_vreg++, ir.GetAttributeU32(IR::Attribute::InstanceId));
ir.SetVectorReg(dst_vreg++, ir.GetAttributeU32(IR::Attribute::PrimitiveId));
// v1: instance ID, step rate 0
if (info.num_input_vgprs > 0) {
ir.SetVectorReg(dst_vreg++, ir.GetAttributeU32(IR::Attribute::InstanceId0));
}
// v2: instance ID, step rate 1
if (info.num_input_vgprs > 1) {
ir.SetVectorReg(dst_vreg++, ir.GetAttributeU32(IR::Attribute::InstanceId1));
}
// v3: instance ID, plain
if (info.num_input_vgprs > 2) {
ir.SetVectorReg(dst_vreg++, ir.GetAttributeU32(IR::Attribute::InstanceId));
}
break;
case Stage::Fragment:
// https://github.com/chaotic-cx/mesa-mirror/blob/72326e15/src/amd/vulkan/radv_shader_args.c#L258