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spirv: Add integer clamping workarounds 

Workaround more bugs on Nvidia's OpenGL SPIR-V compiler.
This commit is contained in:
ReinUsesLisp 2021-05-23 04:12:08 -03:00 committed by ameerj
parent 7b03b97118
commit 33bebc3412
1 changed files with 34 additions and 4 deletions
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38
src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp
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@ -171,7 +171,13 @@ Id EmitFindUMsb32(EmitContext& ctx, Id value) {
}
Id EmitSMin32(EmitContext& ctx, Id a, Id b) {
return ctx.OpSMin(ctx.U32[1], a, b);
const bool is_broken{ctx.profile.has_broken_signed_operations};
if (is_broken) {
a = ctx.OpBitcast(ctx.S32[1], a);
b = ctx.OpBitcast(ctx.S32[1], b);
}
const Id result{ctx.OpSMin(ctx.U32[1], a, b)};
return is_broken ? ctx.OpBitcast(ctx.U32[1], result) : result;
}
Id EmitUMin32(EmitContext& ctx, Id a, Id b) {
@ -179,7 +185,13 @@ Id EmitUMin32(EmitContext& ctx, Id a, Id b) {
}
Id EmitSMax32(EmitContext& ctx, Id a, Id b) {
return ctx.OpSMax(ctx.U32[1], a, b);
const bool is_broken{ctx.profile.has_broken_signed_operations};
if (is_broken) {
a = ctx.OpBitcast(ctx.S32[1], a);
b = ctx.OpBitcast(ctx.S32[1], b);
}
const Id result{ctx.OpSMax(ctx.U32[1], a, b)};
return is_broken ? ctx.OpBitcast(ctx.U32[1], result) : result;
}
Id EmitUMax32(EmitContext& ctx, Id a, Id b) {
@ -187,14 +199,32 @@ Id EmitUMax32(EmitContext& ctx, Id a, Id b) {
}
Id EmitSClamp32(EmitContext& ctx, IR::Inst* inst, Id value, Id min, Id max) {
const Id result{ctx.OpSClamp(ctx.U32[1], value, min, max)};
Id result{};
if (ctx.profile.has_broken_signed_operations || ctx.profile.has_broken_spirv_clamp) {
value = ctx.OpBitcast(ctx.S32[1], value);
min = ctx.OpBitcast(ctx.S32[1], min);
max = ctx.OpBitcast(ctx.S32[1], max);
if (ctx.profile.has_broken_spirv_clamp) {
result = ctx.OpSMax(ctx.S32[1], ctx.OpSMin(ctx.S32[1], value, max), min);
} else {
result = ctx.OpSClamp(ctx.S32[1], value, min, max);
}
result = ctx.OpBitcast(ctx.U32[1], result);
} else {
result = ctx.OpSClamp(ctx.U32[1], value, min, max);
}
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitUClamp32(EmitContext& ctx, IR::Inst* inst, Id value, Id min, Id max) {
const Id result{ctx.OpUClamp(ctx.U32[1], value, min, max)};
Id result{};
if (ctx.profile.has_broken_spirv_clamp) {
result = ctx.OpUMax(ctx.U32[1], ctx.OpUMin(ctx.U32[1], value, max), min);
} else {
result = ctx.OpUClamp(ctx.U32[1], value, min, max);
}
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;