| |
|
CALLEE |
| REGISTER |
USAGE |
SAVE |
| %r0 |
Always zero |
NO |
| %r1 |
general reg |
NO |
| %r2 (%rp) |
return ptr/address |
NO |
| %r3-%r18 |
general regs |
YES |
| %r19 |
shared lib link reg |
NO |
| %r20-%r22 |
general regs |
NO |
| %r23 (%arg3) |
4th iarg |
NO |
| %r24 (%arg2) |
3rd iarg |
NO |
| %r25 (%arg1) |
2nd iarg |
NO |
| %r26 (%arg0) |
1st iarg |
NO |
| %r27 (%dp) |
RESERVED: global data pointer |
NA |
| %r28 (%ret0) |
func ret reg |
NO |
| %r29 |
static link reg |
NO |
| %r30 (%sp) |
stack pointer |
YES |
| %r31 |
general reg |
NO |
| Floating Point Registers |
| %fr0 / always zero |
fp status reg |
NO |
| %fr1-%fr3 |
exceptions regs |
NO |
| %fr4-%fr7 |
fp arg regs |
NO |
| %fr8-%fr11 |
fp regs |
NO |
| %fr12-%fr21 |
fp regs |
YES |
| %fr22-%fr31 |
fp regs |
NO |
|
