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LibJS/JIT: Store the VM register array base in RBX

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This allows us to use the displacement-less MOV encoding when accessing
register $0 (the accumulator).

This reduces code size by 158 KiB on Kraken/ai-astar.js :^)
This commit is contained in:
Andreas Kling 2023-10-28 19:25:26 +02:00
parent 32d3a47058
commit 9c0c672839
1 changed files with 1 additions and 1 deletions
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2
Userland/Libraries/LibJS/JIT/Compiler.h
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@ -32,7 +32,7 @@ private:
static constexpr auto ARG5 = Assembler::Reg::R9;
static constexpr auto RET = Assembler::Reg::RAX;
static constexpr auto STACK_POINTER = Assembler::Reg::RSP;
static constexpr auto REGISTER_ARRAY_BASE = Assembler::Reg::R13;
static constexpr auto REGISTER_ARRAY_BASE = Assembler::Reg::RBX;
static constexpr auto LOCALS_ARRAY_BASE = Assembler::Reg::R14;
static constexpr auto UNWIND_CONTEXT_BASE = Assembler::Reg::R15;
# endif