diff options
| author | Takashi Kokubun <[email protected]> | 2022-12-23 16:23:21 -0800 |
|---|---|---|
| committer | Takashi Kokubun <[email protected]> | 2023-03-05 22:11:20 -0800 |
| commit | 5db2ef5e1480fe15299ea39fe062376e50e35b47 (patch) | |
| tree | e037fbbb12557d491f2af8ccb4de229a2cc21d6f /lib/ruby_vm/mjit/compiler.rb | |
| parent | 783f730773b50a18be5abd2766ff64d4cb917136 (diff) | |
Define constants for magic registers
Diffstat (limited to 'lib/ruby_vm/mjit/compiler.rb')
| -rw-r--r-- | lib/ruby_vm/mjit/compiler.rb | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/lib/ruby_vm/mjit/compiler.rb b/lib/ruby_vm/mjit/compiler.rb index 8a5614c081..652feb9a34 100644 --- a/lib/ruby_vm/mjit/compiler.rb +++ b/lib/ruby_vm/mjit/compiler.rb @@ -13,6 +13,11 @@ module RubyVM::MJIT Qnil = Fiddle::Qnil Qundef = Fiddle::Qundef + # Fixed registers + EC = :rdi # TODO: change this + CFP = :rsi # TODO: change this + SP = :rbx + class Compiler attr_accessor :write_pos @@ -65,10 +70,10 @@ module RubyVM::MJIT # @param asm [RubyVM::MJIT::X86Assembler] def compile_prologue(asm) # Save callee-saved registers used by JITed code - asm.push(:rbx) + asm.push(SP) # Load sp to a register - asm.mov(:rbx, [:rsi, C.rb_control_frame_t.offsetof(:sp)]) # rbx = cfp->sp + asm.mov(SP, [CFP, C.rb_control_frame_t.offsetof(:sp)]) # rbx = cfp->sp end # @param asm [RubyVM::MJIT::X86Assembler] @@ -103,16 +108,16 @@ module RubyVM::MJIT def compile_exit(ctx, asm, exit_pc) # update pc asm.mov(:rax, exit_pc) # rax = exit_pc - asm.mov([:rsi, C.rb_control_frame_t.offsetof(:pc)], :rax) # cfp->pc = rax + asm.mov([CFP, C.rb_control_frame_t.offsetof(:pc)], :rax) # cfp->pc = rax # update sp if ctx.stack_size > 0 - asm.add(:rbx, C.VALUE.size * ctx.stack_size) # rbx += stack_size - asm.mov([:rsi, C.rb_control_frame_t.offsetof(:sp)], :rbx) # cfp->sp = rbx + asm.add(SP, C.VALUE.size * ctx.stack_size) # rbx += stack_size + asm.mov([CFP, C.rb_control_frame_t.offsetof(:sp)], SP) # cfp->sp = rbx end # Restore callee-saved registers - asm.pop(:rbx) + asm.pop(SP) asm.mov(:rax, Qundef) asm.ret |