From 7d88275577d2c72cc6dfbc47591adce8b25b14f0 Mon Sep 17 00:00:00 2001
From: Konstantin Zhuravlyov <kzhuravl_dev@outlook.com>
Date: Fri, 13 Jan 2017 19:49:25 +0000
Subject: [AMDGPU] Implement f16 fcopysign and fcopysign(f32, f64)

Differential Revision: https://reviews.llvm.org/D28496

llvm-svn: 291954
---
 llvm/lib/Target/AMDGPU/AMDGPUInstructions.td |  6 ++++++
 llvm/lib/Target/AMDGPU/SIInstructions.td     | 31 ++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

(limited to 'llvm/lib/Target/AMDGPU')

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
index 59cba636c58..606b6cea2e4 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
@@ -564,6 +564,12 @@ multiclass BFIPatterns <Instruction BFI_INT,
     (BFI_INT (LoadImm32 (i32 0x7fffffff)), $src0, $src1)
   >;
 
+  def : Pat <
+    (f32 (fcopysign f32:$src0, f64:$src1)),
+    (BFI_INT (LoadImm32 (i32 0x7fffffff)), $src0,
+             (i32 (EXTRACT_SUBREG $src1, sub1)))
+  >;
+
   def : Pat <
     (f64 (fcopysign f64:$src0, f64:$src1)),
     (REG_SEQUENCE RC64,
diff --git a/llvm/lib/Target/AMDGPU/SIInstructions.td b/llvm/lib/Target/AMDGPU/SIInstructions.td
index b86c0419118..7810b0d7060 100644
--- a/llvm/lib/Target/AMDGPU/SIInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SIInstructions.td
@@ -677,6 +677,37 @@ def : Pat <
     sub1)
 >;
 
+def : Pat <
+  (fcopysign f16:$src0, f16:$src1),
+  (V_BFI_B32 (S_MOV_B32 (i32 0x00007fff)), $src0, $src1)
+>;
+
+def : Pat <
+  (fcopysign f32:$src0, f16:$src1),
+  (V_BFI_B32 (S_MOV_B32 (i32 0x7fffffff)), $src0,
+             (V_LSHLREV_B32_e64 (i32 16), $src1))
+>;
+
+def : Pat <
+  (fcopysign f64:$src0, f16:$src1),
+  (REG_SEQUENCE SReg_64,
+    (i32 (EXTRACT_SUBREG $src0, sub0)), sub0,
+    (V_BFI_B32 (S_MOV_B32 (i32 0x7fffffff)), (i32 (EXTRACT_SUBREG $src0, sub1)),
+               (V_LSHLREV_B32_e64 (i32 16), $src1)), sub1)
+>;
+
+def : Pat <
+  (fcopysign f16:$src0, f32:$src1),
+  (V_BFI_B32 (S_MOV_B32 (i32 0x00007fff)), $src0,
+             (V_LSHRREV_B32_e64 (i32 16), $src1))
+>;
+
+def : Pat <
+  (fcopysign f16:$src0, f64:$src1),
+  (V_BFI_B32 (S_MOV_B32 (i32 0x00007fff)), $src0,
+             (V_LSHRREV_B32_e64 (i32 16), (EXTRACT_SUBREG $src1, sub1)))
+>;
+
 def : Pat <
   (fneg f16:$src),
   (V_XOR_B32_e32 $src, (V_MOV_B32_e32 (i32 0x00008000)))
-- 
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