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save callee-save registers

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This commit is contained in:
Quentin Carbonneaux 2015-09-20 17:46:17 -04:00
parent dab9590ce7
commit 9fcad221d0
4 changed files with 50 additions and 23 deletions
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24
lisc/isel.c
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@ -486,42 +486,46 @@ classify(Ins *i0, Ins *i1, AClass *ac, int op)
}
int rsave[NRSave] = {RDI, RSI, RDX, RCX, R8, R9, R10, R11, RAX};
int rclob[NRClob] = {RBX, R12, R13, R14, R15};
uint64_t calldef(Ins i, int *p)
ulong
calldef(Ins i, int *p)
{
uint64_t b;
ulong b;
int n;
n = i.arg[1].val & 15;
b = 1ll << RAX;
b = BIT(RAX);
if (n == 2)
b |= 1ll << RDX;
b |= BIT(RDX);
if (p)
*p = n;
return b;
}
uint64_t calluse(Ins i, int *p)
ulong
calluse(Ins i, int *p)
{
uint64_t b;
ulong b;
int j, n;
n = (i.arg[1].val >> 4) & 15;
for (j = 0, b = 0; j < n; j++)
b |= 1ll << rsave[j];
b |= BIT(rsave[j]);
if (p)
*p = n;
return b;
}
uint64_t callclb(Ins i, int *p)
ulong
callclb(Ins i, int *p)
{
uint64_t b;
ulong b;
int j, n;
n = (i.arg[1].val >> 4) & 15;
for (j = n, b = 0; j < NRSave; j++)
b |= 1ll << rsave[j];
b |= BIT(rsave[j]);
if (p)
*p = n;
return b;