diff options
Diffstat (limited to 'lib/ruby_vm/mjit/x86_assembler.rb')
| -rw-r--r-- | lib/ruby_vm/mjit/x86_assembler.rb | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/lib/ruby_vm/mjit/x86_assembler.rb b/lib/ruby_vm/mjit/x86_assembler.rb index c80a95a73a..12f65f5432 100644 --- a/lib/ruby_vm/mjit/x86_assembler.rb +++ b/lib/ruby_vm/mjit/x86_assembler.rb @@ -133,10 +133,35 @@ module RubyVM::MJIT mod_rm: mod_rm(mod: 0b00, rm: reg_code(dst_reg)), # Mod 00: [reg] imm: imm32(src_imm), ) + # MOV r/m64, r64 (Mod 00) + in Symbol => src_reg if r64?(dst_reg) && r64?(src_reg) + # REX.W + 89 /r + # MR: Operand 1: ModRM:r/m (w), Operand 2: ModRM:reg (r) + insn( + prefix: REX_W, + opcode: 0x89, + mod_rm: mod_rm(mod: 0b00, reg: reg_code(src_reg), rm: reg_code(dst_reg)), # Mod 00: [reg] + ) + else + raise NotImplementedError, "mov: not-implemented operands: #{dst.inspect}, #{src.inspect}" end in [Symbol => dst_reg, Integer => dst_disp] - # MOV r/m64, r64 (Mod 01) + # Optimize encoding when disp is 0 + return mov([dst_reg], src) if dst_disp == 0 + case src + # MOV r/m64, imm32 (Mod 01) + in Integer => src_imm if r64?(dst_reg) && imm8?(dst_disp) && imm32?(src_imm) + # REX.W + C7 /0 id + # MI: Operand 1: ModRM:r/m (w), Operand 2: imm8/16/32/64 + insn( + prefix: REX_W, + opcode: 0xc7, + mod_rm: mod_rm(mod: 0b01, rm: reg_code(dst_reg)), # Mod 01: [reg]+disp8 + disp: dst_disp, + imm: imm32(src_imm), + ) + # MOV r/m64, r64 (Mod 01) in Symbol => src_reg if r64?(dst_reg) && imm8?(dst_disp) && r64?(src_reg) # REX.W + 89 /r # MR: Operand 1: ModRM:r/m (w), Operand 2: ModRM:reg (r) |