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clean up condition codes a little bit

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put back in Tcc code that was deleted in last merge

arch/sparc/isa/bitfields.isa:
    clean up condition codes a little bit

--HG--
extra : convert_revision : c554fd5c3ee8cfd6643f69f8351124a7a4b5d9fa
This commit is contained in:
Ali Saidi 2006-03-16 23:09:01 -05:00
parent fc5d25bdb6
commit cf94242539
2 changed files with 30 additions and 22 deletions
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12
arch/sparc/isa/bitfields.isa
View file

@ -7,13 +7,11 @@
// simply defined alphabetically
def bitfield A <29>;
def bitfield CC02 <20>;
def bitfield CC03 <25>;
def bitfield CC04 <11>;
def bitfield CC12 <21>;
def bitfield CC13 <26>;
def bitfield CC14 <12>;
def bitfield CC2 <18>;
def bitfield BPCC <21:20>; // for BPcc & FBPcc
def bitfield FCMPCC <26:56>; // for FCMP & FCMPEa
def bitflied FMOVCC <13:11>; // for FMOVcc
def bitfield CC <12:11>; // for MOVcc & Tcc
def bitfierd MOVCC3 <18>; // also for MOVcc
def bitfield CMASK <6:4>;
def bitfield COND2 <28:25>;
def bitfield COND4 <17:14>;

40
arch/sparc/isa/decoder.isa
View file

@ -10,7 +10,7 @@ decode OP default Unknown::unknown()
//Throw an illegal instruction acception
0x0: Trap::illtrap({{fault = new IllegalInstruction;}});
0x1: Branch::bpcc({{
switch((CC12 << 1) | CC02)
switch(BPCC)
{
case 1:
case 3:
@ -387,7 +387,7 @@ decode OP default Unknown::unknown()
}
0x2B: BasicOperate::flushw({{\\window toilet}}); //FLUSHW
0x2C: movcc({{
ccBank = (CC24 << 2) | (CC14 << 1) | (CC04 << 0);
ccBank = (MOVCC3 << 2) | CC;
switch(ccBank)
{
case 0: case 1: case 2: case 3:
@ -511,20 +511,30 @@ decode OP default Unknown::unknown()
0x38: Branch::jmpl({{//Stuff}}); //JMPL
0x39: Branch::return({{//Other Stuff}}); //RETURN
0x3A: decode CC04
0x3A: decode CC
{
// If CC04 == 1, it's an illegal instruction
0x0: decode CC14
{
0x0: Trap::tcci({{
if(passesCondition(ccr_icc, machInst<25:28>))
fault = new TrapInstruction;
}});
0x1: Trap::tccx({{
if(passesCondition(ccr_xcc, machInst<25:28>))
fault = new TrapInstruction;
}});
}
0x0: Trap::tcci({{
#if FULL_SYSTEM
fault = new TrapInstruction;
#else
if(passesCondition(ccr_icc, machInst<25:28>))
// At least glibc only uses trap 0,
// solaris/sunos may use others
assert((I ? Rs1 + Rs2 : Rs1 + SW_TRAP) == 0);
xc->syscall();
#endif
}});
0x2: Trap::tccx({{
#if FULL_SYSTEM
fault = new TrapInstruction;
#else
if(passesCondition(ccr_xcc, machInst<25:28>))
// At least glibc only uses trap 0,
// solaris/sunos may use others
assert((I ? Rs1 + Rs2 : Rs1 + SW_TRAP) == 0);
xc->syscall();
#endif
}});
}
0x3B: BasicOperate::flush({{//Lala}}); //FLUSH
0x3C: BasicOperate::save({{//leprechauns); //SAVE