6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-06 20:32:19 +00:00
Code Issues Projects Releases Wiki Activity

Changed getSOImmValRotate()'s hunt retry logic to ignore the low order 6 bits,

Browse Source 
instead of 7, because we are only looking for even rotate amount.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101172 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Johnny Chen 2010-04-13 20:35:16 +00:00
parent 50d80e394d
commit 8a87ffb925
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/Target/ARM/ARMAddressingModes.h
View File

@ -151,10 +151,10 @@ namespace ARM_AM {
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.