Thanks.
And for
>>But I can't see any reason to allocate a fixed scratch register.
The ACC register here I use is not a fixed register for GCC. I make
ACC register to be suitable for QImode operands only.
2010/4/27 Ian Lance Taylor :
> redriver jiang writes:
>
>> test3.c:27: error: insn doe
redriver jiang writes:
> test3.c:27: error: insn does not satisfy its constraints:
> (insn 52 51 32 0 (parallel [
> (set (reg:HI 16 BASE0)
> (plus:HI (reg:HI 16 BASE0)
> (const_int -2 [0xfffe])))
> (clobber (scratch:QI))
> ]
Hi.
Right now I know confused by the usage of "clobber "match_scratch"".
The scene is as follows:
1.Target cpu is with only a 8 bit ACC register( but I make 16 virtual
registers, for reload problems).
2.For HImode operands, I let them never to goto ACC combined with
other virtual registers.
3.
