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Implement opt_minus

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This commit is contained in:
Takashi Kokubun 2023-01-07 14:06:38 -08:00
parent ee6d627b43
commit 9ef04f5636
4 changed files with 81 additions and 6 deletions
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29
lib/ruby_vm/mjit/assembler.rb
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@ -163,6 +163,17 @@ module RubyVM::MJIT
end
end
def jo(dst)
case dst
# JO rel32
in Integer => dst_addr
# 0F 80 cd
insn(opcode: [0x0f, 0x80], imm: rel32(dst_addr))
else
raise NotImplementedError, "jo: not-implemented operands: #{dst.inspect}"
end
end
def jz(dst)
case dst
# JZ rel8
@ -333,12 +344,28 @@ module RubyVM::MJIT
end
end
# RET
def ret
# RET
# Near return: A return to a procedure within the current code segment
insn(opcode: 0xc3)
end
def sub(dst, src)
case [dst, src]
# SUB r/m64, r64 (Mod 11: reg)
in [Symbol => dst_reg, Symbol => src_reg] if r64?(dst_reg) && r64?(src_reg)
# REX.W + 29 /r
# MR: Operand 1: ModRM:r/m (r, w), Operand 2: ModRM:reg (r)
insn(
prefix: REX_W,
opcode: 0x29,
mod_rm: ModRM[mod: Mod11, reg: src_reg, rm: dst_reg],
)
else
raise NotImplementedError, "sub: not-implemented operands: #{dst.inspect}, #{src.inspect}"
end
end
def test(left, right)
case [left, right]
# TEST r/m8*, imm8 (Mod 01: [reg]+disp8)