[llvm-commits] [llvm] r101172 - /llvm/trunk/lib/Target/ARM/ARMAddressingModes.h

[Johnny Chen]

Author: johnny
Date: Tue Apr 13 15:35:16 2010
New Revision: 101172

URL: http://llvm.org/viewvc/llvm-project?rev=101172&view=rev
Log:
Changed getSOImmValRotate()'s hunt retry logic to ignore the low order 6 bits,
instead of 7, because we are only looking for even rotate amount.

Modified:
    llvm/trunk/lib/Target/ARM/ARMAddressingModes.h

Modified: llvm/trunk/lib/Target/ARM/ARMAddressingModes.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMAddressingModes.h?rev=101172&r1=101171&r2=101172&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMAddressingModes.h (original)
+++ llvm/trunk/lib/Target/ARM/ARMAddressingModes.h Tue Apr 13 15:35:16 2010
@@ -151,10 +151,10 @@
     if ((rotr32(Imm, RotAmt) & ~255U) == 0)
       return (32-RotAmt)&31;  // HW rotates right, not left.
 
-    // For values like 0xF000000F, we should ignore the low 7 bits, then
+    // For values like 0xF000000F, we should ignore the low 6 bits, then
     // retry the hunt.
-    if (Imm & 127U) {
-      unsigned TZ2 = CountTrailingZeros_32(Imm & ~127U);
+    if (Imm & 63U) {
+      unsigned TZ2 = CountTrailingZeros_32(Imm & ~63U);
       unsigned RotAmt2 = TZ2 & ~1;
       if ((rotr32(Imm, RotAmt2) & ~255U) == 0)
         return (32-RotAmt2)&31;  // HW rotates right, not left.