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 | a37b6b6bce6b0aa04de270b756d624fd9c3afad2 (patch) | |
| tree | 91db73276c6a37625d42397391eaa76e92b73ff1 | |
| parent | 5a63887617999fb18e8b661c0f1f0439bfe1b567 (diff) | |
| download | gem5-a37b6b6bce6b0aa04de270b756d624fd9c3afad2.tar.xz | |
ARM: Implement the bfc and bfi instructions.
| -rw-r--r-- | src/arch/arm/isa/insts/misc.isa | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/arch/arm/isa/insts/misc.isa b/src/arch/arm/isa/insts/misc.isa index e3c3132d9..d6ab47f5d 100644 --- a/src/arch/arm/isa/insts/misc.isa +++ b/src/arch/arm/isa/insts/misc.isa @@ -479,4 +479,25 @@ let {{ header_output += RegRegImmImmOpDeclare.subst(sbfxIop) decoder_output += RegRegImmImmOpConstructor.subst(sbfxIop) exec_output += PredOpExecute.subst(sbfxIop) + + bfcCode = ''' + Dest = Op1 & ~(mask(imm2 - imm1 + 1) << imm1); + ''' + bfcIop = InstObjParams("bfc", "Bfc", "RegRegImmImmOp", + { "code": bfcCode, + "predicate_test": predicateTest }, []) + header_output += RegRegImmImmOpDeclare.subst(bfcIop) + decoder_output += RegRegImmImmOpConstructor.subst(bfcIop) + exec_output += PredOpExecute.subst(bfcIop) + + bfiCode = ''' + uint32_t bitMask = (mask(imm2 - imm1 + 1) << imm1); + Dest = ((Op1 << imm1) & bitMask) | (Dest & ~bitMask); + ''' + bfiIop = InstObjParams("bfi", "Bfi", "RegRegImmImmOp", + { "code": bfiCode, + "predicate_test": predicateTest }, []) + header_output += RegRegImmImmOpDeclare.subst(bfiIop) + decoder_output += RegRegImmImmOpConstructor.subst(bfiIop) + exec_output += PredOpExecute.subst(bfiIop) }}; |