diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2022-06-07 21:01:01 -0700 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2022-06-08 08:47:40 -0700 |
| commit | e94c6dbfb57a862dd8a8685eabc4886ad1aaea25 (patch) | |
| tree | 4dffcf96c2d0745767f8105f5ce0e68e42e1f0c0 /gcc | |
| parent | 90a6c3b6d69765ea9269ba7ae16ef02d5527e875 (diff) | |
| download | gcc-e94c6dbfb57a862dd8a8685eabc4886ad1aaea25.zip gcc-e94c6dbfb57a862dd8a8685eabc4886ad1aaea25.tar.gz gcc-e94c6dbfb57a862dd8a8685eabc4886ad1aaea25.tar.bz2 | |
gcc: xtensa: fix PR target/105879
split_double operates with the 'word that comes first in memory in the
target' terminology, while gen_lowpart operates with the 'value
representing some low-order bits of X' terminology. They are not
equivalent and must be dealt with differently on little- and big-endian
targets.
gcc/
PR target/105879
* config/xtensa/xtensa.md (movdi): Rename 'first' and 'second'
to 'lowpart' and 'highpart' so that they match 'gen_lowpart' and
'gen_highpart' bitwise semantics and fix order of highpart and
lowpart depending on target endianness.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/xtensa/xtensa.md | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/gcc/config/xtensa/xtensa.md b/gcc/config/xtensa/xtensa.md index 6f5cbc5..8a11903 100644 --- a/gcc/config/xtensa/xtensa.md +++ b/gcc/config/xtensa/xtensa.md @@ -799,11 +799,14 @@ because of offering further optimization opportunities. */ if (register_operand (operands[0], DImode)) { - rtx first, second; - - split_double (operands[1], &first, &second); - emit_insn (gen_movsi (gen_lowpart (SImode, operands[0]), first)); - emit_insn (gen_movsi (gen_highpart (SImode, operands[0]), second)); + rtx lowpart, highpart; + + if (TARGET_BIG_ENDIAN) + split_double (operands[1], &highpart, &lowpart); + else + split_double (operands[1], &lowpart, &highpart); + emit_insn (gen_movsi (gen_lowpart (SImode, operands[0]), lowpart)); + emit_insn (gen_movsi (gen_highpart (SImode, operands[0]), highpart)); DONE; } |