Dear all,
I am currently working on handling bit-fields on my port and am having
difficulties understanding why GCC is having problems with what I
wrote in.
Following what mips did:
(define_expand "extzv"
[(set (match_operand 0 "register_operand")
(zero_extract (match_operand 1 "nonimmediate_operand")
(match_operand 2 "immediate_operand")
(match_operand 3 "immediate_operand")))]
"!TARGET_MIPS16"
{
...
})
(define_insn "extzv<mode>"
[(set (match_operand:GPR 0 "register_operand" "=d")
(zero_extract:GPR (match_operand:GPR 1 "register_operand" "d")
(match_operand:SI 2 "immediate_operand" "I")
(match_operand:SI 3 "immediate_operand" "I")))]
"mips_use_ins_ext_p (operands[1], INTVAL (operands[2]),INTVAL (operands[3]))"
"<d>ext\t%0,%1,%3,%2"
[(set_attr "type" "arith")
(set_attr "mode" "<MODE>")])
I did:
(define_insn "extzv"
[(set (match_operand 0 "register_operand" "")
(zero_extract (match_operand 1 "register_operand" "")
(match_operand 2 "const_int_operand" "")
(match_operand 3 "const_int_operand" "")))]
""
"")
(define_insn "extzvdi2"
[(set (match_operand:DI 0 "register_operand" "=r")
(zero_extract:DI (match_operand:DI 1 "register_operand" "r")
(match_operand:DI 2 "const_int_operand" "L")
(match_operand:DI 3 "const_int_operand" "L")))]
"check_extract (DImode, DImode, operands[2], operands[2])"
"extr\\t%0,%1,%3,%2";
[(set_attr "type" "arith")
(set_attr "mode" "DI")
(set_attr "length" "1")])
For the moment, I haven't put anything in my expand because I don't
know if anything is necessary yet. I was first looking at if GCC was
generating the right code on simple examples.
But I get this message:
struct4.c: In function 'goo':
struct4.c:32: internal compiler error: in simplify_subreg, at
simplify-rtx.c:4923
Does anybody know how can I solve this issue ?
Thanks again for all your help,
Jean Christophe Beyler
