[llvm] r212676 - R600/SI: Add support for llvm.convert.{to|from}.fp16

[Matt Arsenault]

Author: arsenm
Date: Wed Jul  9 22:22:20 2014
New Revision: 212676

URL: http://llvm.org/viewvc/llvm-project?rev=212676&view=rev
Log:
R600/SI: Add support for llvm.convert.{to|from}.fp16

Added:
    llvm/trunk/test/CodeGen/R600/fp16_to_fp32.ll
    llvm/trunk/test/CodeGen/R600/fp32_to_fp16.ll
Modified:
    llvm/trunk/lib/Target/R600/SIInstructions.td

Modified: llvm/trunk/lib/Target/R600/SIInstructions.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIInstructions.td?rev=212676&r1=212675&r2=212676&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIInstructions.td (original)
+++ llvm/trunk/lib/Target/R600/SIInstructions.td Wed Jul  9 22:22:20 2014
@@ -1078,8 +1078,12 @@ defm V_CVT_I32_F32 : VOP1_32 <0x00000008
   [(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", []>;

Added: llvm/trunk/test/CodeGen/R600/fp16_to_fp32.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/R600/fp16_to_fp32.ll?rev=212676&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/R600/fp16_to_fp32.ll (added)
+++ llvm/trunk/test/CodeGen/R600/fp16_to_fp32.ll Wed Jul  9 22:22:20 2014
@@ -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
+}

Added: llvm/trunk/test/CodeGen/R600/fp32_to_fp16.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/R600/fp32_to_fp16.ll?rev=212676&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/R600/fp32_to_fp16.ll (added)
+++ llvm/trunk/test/CodeGen/R600/fp32_to_fp16.ll Wed Jul  9 22:22:20 2014
@@ -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
+}