Ok, thanks! Andreas
On 11/27/23 10:12, Stefan Schulze Frielinghaus wrote: > Ping. > > On Wed, Oct 25, 2023 at 11:27:33AM +0200, Stefan Schulze Frielinghaus wrote: >> Currently for an unsigned 16-bit comparison between memory and an >> immediate where the high bit is set, a clc is emitted. This is because >> the constant is created for mode HI and therefore sign extended. This >> means constraint D does not hold anymore. Since the mode already >> restricts the immediate to 16 bit, it is enough to make use of >> constraint n and chop of the high bits in the output template. >> >> Bootstrapped and regtested on s390. Ok for mainline? >> >> gcc/ChangeLog: >> >> * config/s390/s390.md (*cmphi_ccu): For immediate operand 1 make >> use of constraint n instead of D and chop of high bits in the >> output template. >> --- >> gcc/config/s390/s390.md | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md >> index 3f29ba21442..777a20f8e77 100644 >> --- a/gcc/config/s390/s390.md >> +++ b/gcc/config/s390/s390.md >> @@ -1355,13 +1355,13 @@ >> (define_insn "*cmphi_ccu" >> [(set (reg CC_REGNUM) >> (compare (match_operand:HI 0 "nonimmediate_operand" "d,d,Q,Q,BQ") >> - (match_operand:HI 1 "general_operand" "Q,S,D,BQ,Q")))] >> + (match_operand:HI 1 "general_operand" "Q,S,n,BQ,Q")))] >> "s390_match_ccmode (insn, CCUmode) >> && !register_operand (operands[1], HImode)" >> "@ >> clm\t%0,3,%S1 >> clmy\t%0,3,%S1 >> - clhhsi\t%0,%1 >> + clhhsi\t%0,%x1 >> # >> #" >> [(set_attr "op_type" "RS,RSY,SIL,SS,SS") >> -- >> 2.41.0 >>
