diff --git a/lib/Target/R600/SIInstructions.td b/lib/Target/R600/SIInstructions.td
index 4164c558378..85bb73a531d 100644
--- a/lib/Target/R600/SIInstructions.td
+++ b/lib/Target/R600/SIInstructions.td
@@ -1325,6 +1325,16 @@ def : Pat<
   (V_MUL_F32_e32 AllReg_32:$src0, (V_RCP_F32_e32 AllReg_32:$src1))
 >;
 
+def : Pat <
+  (fcos AllReg_32:$src0),
+  (V_COS_F32_e32 (V_MUL_F32_e32 AllReg_32:$src0, (V_MOV_IMM_I32 CONST.TWO_PI_INV)))
+>;
+
+def : Pat <
+  (fsin AllReg_32:$src0),
+  (V_SIN_F32_e32 (V_MUL_F32_e32 AllReg_32:$src0, (V_MOV_IMM_I32 CONST.TWO_PI_INV)))
+>;
+
 def : Pat <
   (int_AMDGPU_cube VReg_128:$src),
   (INSERT_SUBREG (INSERT_SUBREG (INSERT_SUBREG (INSERT_SUBREG (v4f32 (IMPLICIT_DEF)),