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| author | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2023-10-25 11:18:14 +0200 |
|---|---|---|
| committer | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2023-11-27 10:23:17 +0100 |
| commit | 74a7bb2c508200651451af04ea81f1d7d0856e5d (patch) | |
| tree | bf1520d0b77cfb2f62eb9294afb6bda95a07f6e0 /gcc | |
| parent | 221166ad15eb37b047c77118f2eb1c8442eaa27b (diff) | |
| download | gcc-74a7bb2c508200651451af04ea81f1d7d0856e5d.zip gcc-74a7bb2c508200651451af04ea81f1d7d0856e5d.tar.gz gcc-74a7bb2c508200651451af04ea81f1d7d0856e5d.tar.bz2 | |
s390: Fix constraint for insn *cmphi_ccu
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.
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.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/s390/s390.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md index e30795a..685bb28 100644 --- a/gcc/config/s390/s390.md +++ b/gcc/config/s390/s390.md @@ -1356,13 +1356,13 @@ (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") |