Add x64 MovsRM operation

Author: nmraz

crates/codegen/src/target/x64.rs

@@ -264,6 +264,7 @@ pub enum X64Instr {
     AddSp(i32),
     MovRM(FullOperandSize, AddrMode),
     MovMR(FullOperandSize, AddrMode),
+    MovsRM(SseFpuPrecision, AddrMode),
     MovsMR(SseFpuPrecision, AddrMode),
     Ret,
     FuncAddrRel(FunctionRef),
@@ -306,6 +307,7 @@ impl X64Instr {
             X64Instr::AddSp(..) => false,
             X64Instr::MovRM(..) => false,
             X64Instr::MovMR(..) => false,
+            X64Instr::MovsRM(..) => false,
             X64Instr::MovsMR(..) => false,
             X64Instr::Ret => false,
             X64Instr::FuncAddrRel(..) => false,
@@ -348,6 +350,7 @@ impl X64Instr {
             X64Instr::AddSp(..) => true,
             X64Instr::MovRM(..) => false,
             X64Instr::MovMR(..) => false,
+            X64Instr::MovsRM(..) => false,
             X64Instr::MovsMR(..) => false,
             X64Instr::Ret => false,
             X64Instr::FuncAddrRel(..) => false,

crates/codegen/src/target/x64/emit.rs

@@ -334,6 +334,12 @@ impl MachineEmit for X64Machine {
                 RegMem::Mem(state.lower_addr_mode(addr_mode, &uses[1..])),
                 uses[0].as_reg().unwrap(),
             ),
+            X64Instr::MovsRM(prec, addr_mode) => emit_movs_r_rm(
+                buffer,
+                *prec,
+                defs[0].as_reg().unwrap(),
+                RegMem::Mem(state.lower_addr_mode(addr_mode, uses)),
+            ),
             X64Instr::MovsMR(prec, addr_mode) => emit_movs_rm_r(
                 buffer,
                 *prec,