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authorMichel Danzer <michel.daenzer@amd.com>2013-04-10 17:17:56 +0000
committerMichel Danzer <michel.daenzer@amd.com>2013-04-10 17:17:56 +0000
commitb187f8cd1ce98e40405ce8acf49997444646408a (patch)
treecee5c11b1e4148a067f80ef55f71b5c19e4eaaf1 /lib/Target/R600/R600Instructions.td
parent74adad6de8cf947257a53bb08364fa0f4f71b10e (diff)
R600/SI: Add pattern for AMDGPUurecip
21 more little piglits with radeonsi. Reviewed-by: Tom Stellard <thomas.stellard@amd.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179186 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/R600/R600Instructions.td')
-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)))
>;