R600/SI: Add support for llvm.convert.{to|from}.fp16

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212676 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/R600/SIInstructions.td b/lib/Target/R600/SIInstructions.td
index 291d63455c9164a3abe67a6e509ae38a2a8b7441..b3b44e2b6801c0bf4534d5ce5c91b7ed45ef7be0 100644 (file)
--- a/lib/Target/R600/SIInstructions.td
+++ b/lib/Target/R600/SIInstructions.td
@@ -1078,8 +1078,12 @@ defm V_CVT_I32_F32 : VOP1_32 <0x00000008, "V_CVT_I32_F32",
   [(set i32:$dst, (fp_to_sint f32:$src0))]
 >;
 defm V_MOV_FED_B32 : VOP1_32 <0x00000009, "V_MOV_FED_B32", []>;
-////def V_CVT_F16_F32 : VOP1_F16 <0x0000000a, "V_CVT_F16_F32", []>;
-//defm V_CVT_F32_F16 : VOP1_32 <0x0000000b, "V_CVT_F32_F16", []>;
+defm V_CVT_F16_F32 : VOP1_32 <0x0000000a, "V_CVT_F16_F32",
+  [(set i32:$dst, (f32_to_f16 f32:$src0))]
+>;
+defm V_CVT_F32_F16 : VOP1_32 <0x0000000b, "V_CVT_F32_F16",
+  [(set f32:$dst, (f16_to_f32 i32:$src0))]
+>;
 //defm V_CVT_RPI_I32_F32 : VOP1_32 <0x0000000c, "V_CVT_RPI_I32_F32", []>;
 //defm V_CVT_FLR_I32_F32 : VOP1_32 <0x0000000d, "V_CVT_FLR_I32_F32", []>;
 //defm V_CVT_OFF_F32_I4 : VOP1_32 <0x0000000e, "V_CVT_OFF_F32_I4", []>;

diff --git a/test/CodeGen/R600/fp16_to_fp32.ll b/test/CodeGen/R600/fp16_to_fp32.ll
new file mode 100644 (file)
index 0000000..fa2e379
--- /dev/null
+++ b/test/CodeGen/R600/fp16_to_fp32.ll
@@ -0,0 +1,14 @@
+; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+
+declare i16 @llvm.convert.to.fp16(float) nounwind readnone
+
+; SI-LABEL: @test_convert_fp16_to_fp32:
+; SI: BUFFER_LOAD_DWORD [[VAL:v[0-9]+]]
+; SI: V_CVT_F16_F32_e32 [[RESULT:v[0-9]+]], [[VAL]]
+; SI: BUFFER_STORE_SHORT [[RESULT]]
+define void @test_convert_fp16_to_fp32(i16 addrspace(1)* noalias %out, float addrspace(1)* noalias %in) nounwind {
+  %val = load float addrspace(1)* %in, align 4
+  %cvt = call i16 @llvm.convert.to.fp16(float %val) nounwind readnone
+  store i16 %cvt, i16 addrspace(1)* %out, align 2
+  ret void
+}

diff --git a/test/CodeGen/R600/fp32_to_fp16.ll b/test/CodeGen/R600/fp32_to_fp16.ll
new file mode 100644 (file)
index 0000000..9997cd3
--- /dev/null
+++ b/test/CodeGen/R600/fp32_to_fp16.ll
@@ -0,0 +1,14 @@
+; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+
+declare float @llvm.convert.from.fp16(i16) nounwind readnone
+
+; SI-LABEL: @test_convert_fp16_to_fp32:
+; SI: BUFFER_LOAD_USHORT [[VAL:v[0-9]+]]
+; SI: V_CVT_F32_F16_e32 [[RESULT:v[0-9]+]], [[VAL]]
+; SI: BUFFER_STORE_DWORD [[RESULT]]
+define void @test_convert_fp16_to_fp32(float addrspace(1)* noalias %out, i16 addrspace(1)* noalias %in) nounwind {
+  %val = load i16 addrspace(1)* %in, align 2
+  %cvt = call float @llvm.convert.from.fp16(i16 %val) nounwind readnone
+  store float %cvt, float addrspace(1)* %out, align 4
+  ret void
+}