mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
91a9062626
* YJIT: use shorter encoding for mov(r64,imm) when unambiguous Previously, for small constants such as `mov(RAX, imm_opnd(Qundef))`, we emit an instruction with an 8-byte immediate. This form commonly gets the `movabs` mnemonic. In 64-bit mode, 32-bit operands get zero extended to 64-bit to fill the register, so when the immediate is small enough, we can save 4 bytes by using the `mov` variant that takes a 32-bit immediate and does a zero extension. Not implement with this change, there is an imm32 variant of `mov` that does sign extension we could use. When the constant is negative, we fallback to the `movabs` form. In railsbench, this change yields roughly a 12% code size reduction for the outlined block. Co-authored-by: Jemma Issroff <jemmaissroff@gmail.com> * [ci skip] comment edit. Please squash. Co-authored-by: Jemma Issroff <jemmaissroff@gmail.com> |
||
|---|---|---|
| .. | ||
| expand_tabs.rb | ||
| lldb_cruby.py | ||
| lldb_disasm.py | ||
| lldb_yjit.py | ||
| rb_optparse.bash | ||
| rb_optparse.zsh | ||
| README | ||
| ruby-style.el | ||
| test_lldb_cruby.rb | ||
| test_yjit_asm.sh | ||
| yjit_asm_tests.c | ||
README this file rb_optparse.bash bash completion script rb_optparse.zsh zsh completion script ruby-style.el Ruby's C/C++ mode style for emacs lldb_cruby.py LLDB port of debug utility test_lldb_cruby.rb test file for LLDB port