diff options
| author | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:08 -0500 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:08 -0500 |
| commit | 2c94bf7f30d3e9febe30485cf7182b650f48f4d5 (patch) | |
| tree | 94bf4b64cd4788baf04566eea744d472639bae1c /src/arch/arm/isa/insts/misc.isa | |
| parent | 00320a53ab67e5f7b7a22b67f6b14ade31348c50 (diff) | |
| download | gem5-2c94bf7f30d3e9febe30485cf7182b650f48f4d5.tar.xz | |
ARM: Implement the clz instruction.
Diffstat (limited to 'src/arch/arm/isa/insts/misc.isa')
| -rw-r--r-- | src/arch/arm/isa/insts/misc.isa | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/arch/arm/isa/insts/misc.isa b/src/arch/arm/isa/insts/misc.isa index 09d27360e..c673372bb 100644 --- a/src/arch/arm/isa/insts/misc.isa +++ b/src/arch/arm/isa/insts/misc.isa @@ -174,6 +174,16 @@ let {{ decoder_output += RevOpConstructor.subst(rbitIop) exec_output += PredOpExecute.subst(rbitIop) + clzCode = ''' + Dest = (Op1 == 0) ? 32 : (31 - findMsbSet(Op1)); + ''' + clzIop = InstObjParams("clz", "ClzInst", "RevOp", + { "code": clzCode, + "predicate_test": predicateTest }, []) + header_output += RevOpDeclare.subst(clzIop) + decoder_output += RevOpConstructor.subst(clzIop) + exec_output += PredOpExecute.subst(clzIop) + ssatCode = ''' int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0); int32_t res; |