[PATCH] R600: Expand vector FSQRT ops

[Aaron Watry]

Reviewed-by: Aaron Watry <awatry at gmail.com>

I have tested this on a Radeon 5400 (Cedar), and I just sent a few
generated tests to the piglit list.

--Aaron

On Wed, Oct 23, 2013 at 6:28 PM, Tom Stellard <tom at stellard.net> wrote:
> From: Tom Stellard <thomas.stellard at amd.com>
>
> ---
>  lib/Target/R600/AMDGPUISelLowering.cpp |  1 +
>  test/CodeGen/R600/llvm.sqrt.ll         | 54 ++++++++++++++++++++++++++++++++++
>  2 files changed, 55 insertions(+)
>  create mode 100644 test/CodeGen/R600/llvm.sqrt.ll
>
> diff --git a/lib/Target/R600/AMDGPUISelLowering.cpp b/lib/Target/R600/AMDGPUISelLowering.cpp
> index 91d85d3..52dd010 100644
> --- a/lib/Target/R600/AMDGPUISelLowering.cpp
> +++ b/lib/Target/R600/AMDGPUISelLowering.cpp
> @@ -181,6 +181,7 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
>      setOperationAction(ISD::FFLOOR, VT, Expand);
>      setOperationAction(ISD::FMUL, VT, Expand);
>      setOperationAction(ISD::FRINT, VT, Expand);
> +    setOperationAction(ISD::FSQRT, VT, Expand);
>      setOperationAction(ISD::FSUB, VT, Expand);
>    }
>  }
> diff --git a/test/CodeGen/R600/llvm.sqrt.ll b/test/CodeGen/R600/llvm.sqrt.ll
> new file mode 100644
> index 0000000..0d0d186
> --- /dev/null
> +++ b/test/CodeGen/R600/llvm.sqrt.ll
> @@ -0,0 +1,54 @@
> +; RUN: llc < %s -march=r600 --mcpu=redwood | FileCheck %s --check-prefix=R600-CHECK
> +; RUN: llc < %s -march=r600 --mcpu=SI | FileCheck %s --check-prefix=SI-CHECK
> +
> +; R600-CHECK-LABEL: @sqrt_f32
> +; R600-CHECK: RECIPSQRT_CLAMPED * T{{[0-9]\.[XYZW]}}, KC0[2].Z
> +; R600-CHECK: MUL NON-IEEE T{{[0-9]\.[XYZW]}}, KC0[2].Z, PS
> +; SI-CHECK-LABEL: @sqrt_f32
> +; SI-CHECK: V_SQRT_F32_e32
> +define void @sqrt_f32(float addrspace(1)* %out, float %in) {
> +entry:
> +  %0 = call float @llvm.sqrt.f32(float %in)
> +  store float %0, float addrspace(1)* %out
> +  ret void
> +}
> +
> +; R600-CHECK-LABEL: @sqrt_v2f32
> +; R600-CHECK-DAG: RECIPSQRT_CLAMPED * T{{[0-9]\.[XYZW]}}, KC0[2].W
> +; R600-CHECK-DAG: MUL NON-IEEE T{{[0-9]\.[XYZW]}}, KC0[2].W, PS
> +; R600-CHECK-DAG: RECIPSQRT_CLAMPED * T{{[0-9]\.[XYZW]}}, KC0[3].X
> +; R600-CHECK-DAG: MUL NON-IEEE T{{[0-9]\.[XYZW]}}, KC0[3].X, PS
> +; SI-CHECK-LABEL: @sqrt_v2f32
> +; SI-CHECK: V_SQRT_F32_e32
> +; SI-CHECK: V_SQRT_F32_e32
> +define void @sqrt_v2f32(<2 x float> addrspace(1)* %out, <2 x float> %in) {
> +entry:
> +  %0 = call <2 x float> @llvm.sqrt.v2f32(<2 x float> %in)
> +  store <2 x float> %0, <2 x float> addrspace(1)* %out
> +  ret void
> +}
> +
> +; R600-CHECK-LABEL: @sqrt_v4f32
> +; R600-CHECK-DAG: RECIPSQRT_CLAMPED * T{{[0-9]\.[XYZW]}}, KC0[3].Y
> +; R600-CHECK-DAG: MUL NON-IEEE T{{[0-9]\.[XYZW]}}, KC0[3].Y, PS
> +; R600-CHECK-DAG: RECIPSQRT_CLAMPED * T{{[0-9]\.[XYZW]}}, KC0[3].Z
> +; R600-CHECK-DAG: MUL NON-IEEE T{{[0-9]\.[XYZW]}}, KC0[3].Z, PS
> +; R600-CHECK-DAG: RECIPSQRT_CLAMPED * T{{[0-9]\.[XYZW]}}, KC0[3].W
> +; R600-CHECK-DAG: MUL NON-IEEE T{{[0-9]\.[XYZW]}}, KC0[3].W, PS
> +; R600-CHECK-DAG: RECIPSQRT_CLAMPED * T{{[0-9]\.[XYZW]}}, KC0[4].X
> +; R600-CHECK-DAG: MUL NON-IEEE T{{[0-9]\.[XYZW]}}, KC0[4].X, PS
> +; SI-CHECK-LABEL: @sqrt_v4f32
> +; SI-CHECK: V_SQRT_F32_e32
> +; SI-CHECK: V_SQRT_F32_e32
> +; SI-CHECK: V_SQRT_F32_e32
> +; SI-CHECK: V_SQRT_F32_e32
> +define void @sqrt_v4f32(<4 x float> addrspace(1)* %out, <4 x float> %in) {
> +entry:
> +  %0 = call <4 x float> @llvm.sqrt.v4f32(<4 x float> %in)
> +  store <4 x float> %0, <4 x float> addrspace(1)* %out
> +  ret void
> +}
> +
> +declare float @llvm.sqrt.f32(float %in)
> +declare <2 x float> @llvm.sqrt.v2f32(<2 x float> %in)
> +declare <4 x float> @llvm.sqrt.v4f32(<4 x float> %in)
> --
> 1.7.11.4
>
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