R600/SI: Add fsqrt pattern for SI

Patch by: Niels Ole Salscheider

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186180 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/R600/SIInstructions.td b/lib/Target/R600/SIInstructions.td
index eed4f7fb8e593411fdab64eaa6ade5e5c2db7dbf..0f94164665c38f9597dc247ab58719f96c385ff9 100644 (file)
--- a/lib/Target/R600/SIInstructions.td
+++ b/lib/Target/R600/SIInstructions.td
@@ -669,8 +669,12 @@ defm V_RCP_F64 : VOP1_64 <0x0000002f, "V_RCP_F64",
 defm V_RCP_CLAMP_F64 : VOP1_64 <0x00000030, "V_RCP_CLAMP_F64", []>;
 defm V_RSQ_F64 : VOP1_64 <0x00000031, "V_RSQ_F64", []>;
 defm V_RSQ_CLAMP_F64 : VOP1_64 <0x00000032, "V_RSQ_CLAMP_F64", []>;
-defm V_SQRT_F32 : VOP1_32 <0x00000033, "V_SQRT_F32", []>;
-defm V_SQRT_F64 : VOP1_64 <0x00000034, "V_SQRT_F64", []>;
+defm V_SQRT_F32 : VOP1_32 <0x00000033, "V_SQRT_F32",
+  [(set f32:$dst, (fsqrt f32:$src0))]
+>;
+defm V_SQRT_F64 : VOP1_64 <0x00000034, "V_SQRT_F64",
+  [(set f64:$dst, (fsqrt f64:$src0))]
+>;
 defm V_SIN_F32 : VOP1_32 <0x00000035, "V_SIN_F32", []>;
 defm V_COS_F32 : VOP1_32 <0x00000036, "V_COS_F32", []>;
 defm V_NOT_B32 : VOP1_32 <0x00000037, "V_NOT_B32", []>;

diff --git a/test/CodeGen/R600/fsqrt.ll b/test/CodeGen/R600/fsqrt.ll
new file mode 100644 (file)
index 0000000..2613805
--- /dev/null
+++ b/test/CodeGen/R600/fsqrt.ll
@@ -0,0 +1,24 @@
+; RUN: llc < %s -march=r600 -mcpu=tahiti | FileCheck %s
+
+; CHECK: @fsqrt_f32
+; CHECK: V_SQRT_F32_e32 {{VGPR[0-9]+, VGPR[0-9]+}}
+
+define void @fsqrt_f32(float addrspace(1)* %out, float addrspace(1)* %in) {
+   %r0 = load float addrspace(1)* %in
+   %r1 = call float @llvm.sqrt.f32(float %r0)
+   store float %r1, float addrspace(1)* %out
+   ret void
+}
+
+; CHECK: @fsqrt_f64
+; CHECK: V_SQRT_F64_e32 {{VGPR[0-9]+_VGPR[0-9]+, VGPR[0-9]+_VGPR[0-9]+}}
+
+define void @fsqrt_f64(double addrspace(1)* %out, double addrspace(1)* %in) {
+   %r0 = load double addrspace(1)* %in
+   %r1 = call double @llvm.sqrt.f64(double %r0)
+   store double %r1, double addrspace(1)* %out
+   ret void
+}
+
+declare float @llvm.sqrt.f32(float %Val)
+declare double @llvm.sqrt.f64(double %Val)