35 lines
986 B
Ruby
35 lines
986 B
Ruby
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module RubyVM::MJIT
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class ExitCompiler
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def initialize = freeze
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# @param jit [RubyVM::MJIT::JITState]
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# @param ctx [RubyVM::MJIT::Context]
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# @param asm [RubyVM::MJIT::X86Assembler]
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def compile_exit(jit, ctx, asm)
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if C.mjit_opts.stats
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insn = decode_insn(C.VALUE.new(jit.pc).*)
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asm.comment("increment insn exit: #{insn.name}")
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asm.mov(:rax, (C.mjit_insn_exits + insn.bin).to_i)
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asm.add([:rax], 1) # TODO: lock
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end
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asm.comment("exit to interpreter")
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# Update pc
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asm.mov(:rax, jit.pc) # rax = jit.pc
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asm.mov([CFP, C.rb_control_frame_t.offsetof(:pc)], :rax) # cfp->pc = rax
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# Update sp
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if ctx.stack_size > 0
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asm.add(SP, C.VALUE.size * ctx.stack_size) # rbx += stack_size
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asm.mov([CFP, C.rb_control_frame_t.offsetof(:sp)], SP) # cfp->sp = rbx
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end
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# Restore callee-saved registers
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asm.pop(SP)
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asm.mov(:rax, Qundef)
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asm.ret
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end
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end
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end
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