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| author | Takayuki 'January June' Suwa <jjsuwa_sys3175@yahoo.co.jp> | 2021-05-27 19:04:12 +0900 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2022-06-13 17:25:48 -0700 |
| commit | 70ce04ca353bb0cda8321b91a77c2477e26d339b (patch) | |
| tree | 024ec5354e8f68d1928e3d3ea97b3f044ac24d26 /gcc/tree-vect-patterns.cc | |
| parent | e1b193c1cce3a975a9ed60dd0f30182fe0255d7c (diff) | |
| download | gcc-70ce04ca353bb0cda8321b91a77c2477e26d339b.zip gcc-70ce04ca353bb0cda8321b91a77c2477e26d339b.tar.gz gcc-70ce04ca353bb0cda8321b91a77c2477e26d339b.tar.bz2 | |
xtensa: Make use of BALL/BNALL instructions
In Xtensa ISA, there is no single machine instruction that calculates unary
bitwise negation, but a few similar fused instructions are exist:
"BALL Ax, Ay, label" // if ((~Ax & Ay) == 0) goto label;
"BNALL Ax, Ay, label" // if ((~Ax & Ay) != 0) goto label;
These instructions have never been emitted before, but it seems no reason not
to make use of them.
gcc/ChangeLog:
* config/xtensa/xtensa.md (*masktrue_bitcmpl): New insn pattern.
gcc/testsuite/ChangeLog:
* gcc.target/xtensa/BALL-BNALL.c: New.
Diffstat (limited to 'gcc/tree-vect-patterns.cc')
0 files changed, 0 insertions, 0 deletions