| commit | c21576f8a32715ab439690d18184b0e02022bbbd | |
| author | Ben Noordhuis <info@bnoordhuis.nl> | |
| Thu, 10 Oct 2024 20:46:14 +0000 (10 22:46 +0200) | ||
| committer | Ben Noordhuis <info@bnoordhuis.nl> | |
| Thu, 10 Oct 2024 20:48:56 +0000 (10 22:48 +0200) | ||
| tree | b0c1d4d712eb7d34aa369339f43a2cc07c9a5335 | treesnapshot (tar.gz zip) |
| parent | b668b72b0660fd803829e9876302222411b0fa1a | commitdiff |
Emit better x86_64 asm for constant loads
Instead of always emitting movabs, emit a regular mov or a xor.
Slims down sequences like:
movabs $0,%rax
mov %rsi,%rax
To:
xor %eax,%eax // also zeroes upper word
mov %rsi,%rax
Future work is to just emit:
xor %esi,%esi
Instead of always emitting movabs, emit a regular mov or a xor.
Slims down sequences like:
movabs $0,%rax
mov %rsi,%rax
To:
xor %eax,%eax // also zeroes upper word
mov %rsi,%rax
Future work is to just emit:
xor %esi,%esi
| x86_64-gen.c | diffblobblamehistory |