76f1949cfa
Adds the fwidth intrinsic for HLSL. The DXIL path only requires modification to the hlsl headers. The SPIRV path implements the OpFwidth builtin in Clang and instruction selection for the OpFwidth instruction in LLVM. Also adds shader stage tests to the ddx_coarse and ddy_coarse instructions used by fwidth. Closes #99120 --------- Co-authored-by: Alexander Johnston <alexander.johnston@amd.com>
30 lines
1.2 KiB
LLVM
30 lines
1.2 KiB
LLVM
; RUN: not opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library %s 2>&1 | FileCheck --check-prefixes=CHECK-TYPE %s
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; RUN: not opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-compute %s 2>&1 | FileCheck --check-prefixes=CHECK-STAGE %s
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; DXIL operation ddx.coarse does not support double overload type
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; CHECK-TYPE: in function ddx.coarse
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; CHECK-TYPE-SAME: Cannot create DerivCoarseX operation: Invalid overload type
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; Function Attrs: noinline nounwind optnone
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define noundef double @ddx.coarse_double(double noundef %a) #0 {
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entry:
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%a.addr = alloca double, align 8
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store double %a, ptr %a.addr, align 8
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%0 = load double, ptr %a.addr, align 8
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%dx.ddx.coarse = call double @llvm.dx.ddx.coarse.f64(double %0)
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ret double %dx.ddx.coarse
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}
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; DXIL operation ddx.coarse does not support compute shader stage
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; CHECK-STAGE: in function ddx.coarse
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; CHECK-STAGE-SAME: Cannot create DerivCoarseX operation: Invalid stage
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; Function Attrs: noinline nounwind optnone
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define noundef float @ddx.coarse_float(float noundef %a) #0 {
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entry:
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%a.addr = alloca float, align 8
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store float %a, ptr %a.addr, align 8
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%0 = load float, ptr %a.addr, align 8
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%dx.ddx.coarse = call float @llvm.dx.ddx.coarse.f32(float %0)
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ret float %dx.ddx.coarse
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}
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