polkavm-assembler: add xchg_mem

paritytech · Jan 16, 2025 · 96bfd33 · 96bfd33
1 parent 9a4902c
commit 96bfd33
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/crates/polkavm-assembler/src/amd64.rs b/crates/polkavm-assembler/src/amd64.rs
@@ -1419,6 +1419,12 @@ pub mod inst {
             None,
             (fmt.write_fmt(core::format_args!("cmov{} {}, {}", self.0.suffix(), self.2.name_from(self.1), self.3.display_without_prefix(Size::from(self.1))))),
 
+        // https://www.felixcloutier.com/x86/xchg
+        xchg_mem(RegSize, Reg, MemOp) =>
+            Inst::new(0x87).rex_64b_if(matches!(self.0, RegSize::R64)).modrm_reg(self.1).mem(self.2).encode(),
+            None,
+            (fmt.write_fmt(core::format_args!("xchg {}, {}", self.1.name_from(self.0), self.2))),
+
         // https://www.felixcloutier.com/x86/add
         add(Operands) =>
             alu_impl(0x00, 0x02, 0b000, self.0),
@@ -2384,6 +2390,7 @@ mod tests {
         syscall,
         test,
         ud2,
+        xchg_mem,
         xor,
     }