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Properly return a value from the stack as well

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This commit is contained in:
Takashi Kokubun 2022-12-20 23:38:00 -08:00
parent 145c937f3f
commit dfa19a1658
2 changed files with 11 additions and 2 deletions
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2
lib/mjit/insn_compiler.rb
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@ -18,7 +18,7 @@ module RubyVM::MJIT
asm.mov([:rdi, C.rb_execution_context_t.offsetof(:cfp)], :rsi) # ec->cfp = rsi
# return a value
asm.mov(:rax, 1001)
asm.mov(:rax, [:rbx])
asm.ret
EndBlock
end

11
lib/mjit/x86_assembler.rb
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@ -73,7 +73,16 @@ module RubyVM::MJIT
mod_rm: mod_rm(mod: 0b01, reg: reg_code(src_reg), rm: reg_code(dst_reg)), # Mod 01: [reg]+disp8
disp: dst_offset,
)
# MOV r64, r/m64
# MOV r64, r/m64 (Mod 00)
in [Symbol => dst_reg, [Symbol => src_reg]] if r_reg?(dst_reg) && r_reg?(src_reg)
# REX.W + 8B /r
# RM: Operand 1: ModRM:reg (w), Operand 2: ModRM:r/m (r)
insn(
prefix: REX_W,
opcode: 0x8b,
mod_rm: mod_rm(mod: 0b00, reg: reg_code(dst_reg), rm: reg_code(src_reg)), # Mod 00: [reg]
)
# MOV r64, r/m64 (Mod 01)
in [Symbol => dst_reg, [Symbol => src_reg, Integer => src_offset]] if r_reg?(dst_reg) && r_reg?(src_reg) && src_offset <= 0xff
# REX.W + 8B /r
# RM: Operand 1: ModRM:reg (w), Operand 2: ModRM:r/m (r)