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ARM: Implement the usad8 and usada8 instructions.

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This commit is contained in:
Gabe Black 2010-06-02 12:58:07 -05:00
parent c643b1c274
commit 8f566e5ee3
1 changed files with 36 additions and 0 deletions
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36
src/arch/arm/isa/insts/misc.isa
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@ -387,4 +387,40 @@ let {{
header_output += RegRegRegOpDeclare.subst(selIop)
decoder_output += RegRegRegOpConstructor.subst(selIop)
exec_output += PredOpExecute.subst(selIop)
usad8Code = '''
uint32_t resTemp = 0;
for (unsigned i = 0; i < 4; i++) {
int low = i * 8;
int high = low + 7;
int32_t diff = bits(Op1, high, low) -
bits(Op2, high, low);
resTemp += ((diff < 0) ? -diff : diff);
}
Dest = resTemp;
'''
usad8Iop = InstObjParams("usad8", "Usad8", "RegRegRegOp",
{ "code": usad8Code,
"predicate_test": predicateTest }, [])
header_output += RegRegRegOpDeclare.subst(usad8Iop)
decoder_output += RegRegRegOpConstructor.subst(usad8Iop)
exec_output += PredOpExecute.subst(usad8Iop)
usada8Code = '''
uint32_t resTemp = 0;
for (unsigned i = 0; i < 4; i++) {
int low = i * 8;
int high = low + 7;
int32_t diff = bits(Op1, high, low) -
bits(Op2, high, low);
resTemp += ((diff < 0) ? -diff : diff);
}
Dest = Op3 + resTemp;
'''
usada8Iop = InstObjParams("usada8", "Usada8", "RegRegRegRegOp",
{ "code": usada8Code,
"predicate_test": predicateTest }, [])
header_output += RegRegRegRegOpDeclare.subst(usada8Iop)
decoder_output += RegRegRegRegOpConstructor.subst(usada8Iop)
exec_output += PredOpExecute.subst(usada8Iop)
}};