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ARM: Implement the ubfx and sbfx instructions.

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This commit is contained in:
Gabe Black
2010-06-02 12:58:08 -05:00
parent b1158e4938
commit 09cc401848
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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@@ -458,4 +458,25 @@ let {{
header_output += BasicDeclare.subst(nopIop)
decoder_output += BasicConstructor.subst(nopIop)
exec_output += BasicExecute.subst(nopIop)
ubfxCode = '''
Dest = bits(Op1, imm2, imm1);
'''
ubfxIop = InstObjParams("ubfx", "Ubfx", "RegRegImmImmOp",
{ "code": ubfxCode,
"predicate_test": predicateTest }, [])
header_output += RegRegImmImmOpDeclare.subst(ubfxIop)
decoder_output += RegRegImmImmOpConstructor.subst(ubfxIop)
exec_output += PredOpExecute.subst(ubfxIop)
sbfxCode = '''
int32_t resTemp = bits(Op1, imm2, imm1);
Dest = resTemp | -(resTemp & (1 << (imm2 - imm1)));
'''
sbfxIop = InstObjParams("sbfx", "Sbfx", "RegRegImmImmOp",
{ "code": sbfxCode,
"predicate_test": predicateTest }, [])
header_output += RegRegImmImmOpDeclare.subst(sbfxIop)
decoder_output += RegRegImmImmOpConstructor.subst(sbfxIop)
exec_output += PredOpExecute.subst(sbfxIop)
}};