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[NEW] x86_inc instruction with some binary encoding.

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sjs 2009-05-24 14:05:40 -07:00
parent 9607df73d2
commit 83accb5bba
1 changed files with 15 additions and 0 deletions
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15
compiler.rb
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@ -671,6 +671,21 @@ class Compiler
emit("idiv #{op}") emit("idiv #{op}")
end end
def x86_inc(op)
emit("inc #{op}")
asm do
if register?(op)
emit_byte(0x40 + regnum(op))
elsif rm32?(op)
emit_byte(0xff)
emit_modrm(
else
raise "unsupported op #{op}, wanted r32 or r/m32"
end
end
end
def x86_push(reg) def x86_push(reg)
emit("push #{reg}") emit("push #{reg}")
end end