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-rw-r--r--lib/Target/R600/R600Instructions.td3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Target/R600/R600Instructions.td b/lib/Target/R600/R600Instructions.td
index b4c45e18fc1..8ede6ccc5a2 100644
--- a/lib/Target/R600/R600Instructions.td
+++ b/lib/Target/R600/R600Instructions.td
@@ -1923,10 +1923,11 @@ def : COS_PAT <COS_cm>;
defm DIV_cm : DIV_Common<RECIP_IEEE_cm>;
// RECIP_UINT emulation for Cayman
+// The multiplication scales from [0,1] to the unsigned integer range
def : Pat <
(AMDGPUurecip R600_Reg32:$src0),
(FLT_TO_UINT_eg (MUL_IEEE (RECIP_IEEE_cm (UINT_TO_FLT_eg R600_Reg32:$src0)),
- (MOV_IMM_I32 0x4f800000)))
+ (MOV_IMM_I32 CONST.FP_UINT_MAX_PLUS_1)))
>;