ARM: Fix the CLZ instruction.

2009-07-27 00:52:59 -07:00
parent dc0df3f396
commit b560acfe17
1 changed files with 1 additions and 2 deletions
--- a/src/arch/arm/isa/decoder.isa
+++ b/src/arch/arm/isa/decoder.isa
@@ -113,8 +113,7 @@ format DataOp {
                0x1: decode OPCODE {
                    0x9: BranchExchange::bx({{ }});
                    0xb: PredOp::clz({{
-                        unsigned lsb = findLsbSet(Rm);
-                        Rd = (lsb > 31) ? 32 : lsb;
+                        Rd = ((Rm == 0) ? 32 : (31 - findMsbSet(Rm)));
                    }});
                }
                0x2: decode OPCODE {