kernel coder wrote:
Would you please give a bit more explaination of "GPRs come in pairs"
and where this assumption is being checked in function
override_options.
It doesn't, that's why $24 gets marked as suitable for DImode in
mips_hard_regno_mode_ok.
kernel coder wrote:
Would you please give a bit more explaination of "GPRs come in pairs"
and where this assumption is being checked in function
override_options.
These two lines
else if (GP_REG_P (regno))
temp = ((regno & 1) == 0 || size <= UNITS_PER_WORD);
which say tha
This violates an assumption in mips.c:override_options that GPRs come in pairs.
Thus you end up with (reg/v:DI 24 $24 [orig:55 res2 ] [55]), which does not
satisfy the 'd' constraint.
Would you please give a bit more explaination of "GPRs come in pairs"
and where this assumption is being checke
In http://gcc.gnu.org/ml/gcc/2006-07/msg00632.html, you wrote:
dp-bit.c: In function '__muldf3':
dp-bit.c:953: error: insn does not satisfy its constraints:
(insn 677 231 616 19 dp-bit.c:871 (set (reg/v:DI 24 $24 [orig:55 res2 ] [55])
(reg:DI 2 $2)) 3 {*movdi_32bit} (nil)
(nil))
dp-bit.c:
hi,
I'm trying to learn mips backend by making some changes to it.I
just tried to decrease the number of general purpose registers to 25
but following error was generated.
dp-bit.c: In function '__muldf3':
dp-bit.c:953: error: insn does not satisfy its constraints:
(insn 677 231 616 19 dp-bit.c
