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ARM: Implement the CPS instruction.

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This commit is contained in:
Gabe Black
2010-06-02 12:58:11 -05:00
parent eb1447302d
commit 7861b084f6
1 changed files with 31 additions and 0 deletions
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31
src/arch/arm/isa/insts/misc.isa
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@@ -546,4 +546,35 @@ let {{
header_output += ImmOpDeclare.subst(setendIop)
decoder_output += ImmOpConstructor.subst(setendIop)
exec_output += PredOpExecute.subst(setendIop)
cpsCode = '''
uint32_t mode = bits(imm, 4, 0);
uint32_t f = bits(imm, 5);
uint32_t i = bits(imm, 6);
uint32_t a = bits(imm, 7);
bool setMode = bits(imm, 8);
bool enable = bits(imm, 9);
CPSR cpsr = Cpsr;
if (cpsr.mode != MODE_USER) {
if (enable) {
if (f) cpsr.f = 0;
if (i) cpsr.i = 0;
if (a) cpsr.a = 0;
} else {
if (f) cpsr.f = 1;
if (i) cpsr.i = 1;
if (a) cpsr.a = 1;
}
if (setMode) {
cpsr.mode = mode;
}
}
Cpsr = cpsr;
'''
cpsIop = InstObjParams("cps", "Cps", "ImmOp",
{ "code": cpsCode,
"predicate_test": predicateTest }, [])
header_output += ImmOpDeclare.subst(cpsIop)
decoder_output += ImmOpConstructor.subst(cpsIop)
exec_output += PredOpExecute.subst(cpsIop)
}};