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ARM: Implement the bfc and bfi instructions.

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This commit is contained in:
Gabe Black 2010-06-02 12:58:08 -05:00
parent 5a63887617
commit a37b6b6bce
1 changed files with 21 additions and 0 deletions
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21
src/arch/arm/isa/insts/misc.isa
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@ -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)
}};