add x86_64 Int neq support for gen_dev

compiler/gen_dev/src/generic64/aarch64.rs

@@ -490,6 +490,16 @@ impl Assembler<AArch64GeneralReg, AArch64FloatReg> for AArch64Assembler {
         unimplemented!("registers equality not implemented yet for AArch64");
     }
 
+    #[inline(always)]
+    fn neq_reg64_reg64_reg64(
+        _buf: &mut Vec<'_, u8>,
+        _dst: AArch64GeneralReg,
+        _src1: AArch64GeneralReg,
+        _src2: AArch64GeneralReg,
+    ) {
+        unimplemented!("registers non-equality not implemented yet for AArch64");
+    }
+
     #[inline(always)]
     fn ret(buf: &mut Vec<'_, u8>) {
         ret_reg64(buf, AArch64GeneralReg::LR)

compiler/gen_dev/src/generic64/mod.rs

@@ -172,6 +172,13 @@ pub trait Assembler<GeneralReg: RegTrait, FloatReg: RegTrait> {
         src2: GeneralReg,
     );
 
+    fn neq_reg64_reg64_reg64(
+        buf: &mut Vec<'_, u8>,
+        dst: GeneralReg,
+        src1: GeneralReg,
+        src2: GeneralReg,
+    );
+
     fn ret(buf: &mut Vec<'_, u8>);
 }
 
@@ -842,6 +849,25 @@ impl<
         }
     }
 
+    fn build_neq(
+        &mut self,
+        dst: &Symbol,
+        src1: &Symbol,
+        src2: &Symbol,
+        arg_layout: &Layout<'a>,
+    ) -> Result<(), String> {
+        match arg_layout {
+            Layout::Builtin(Builtin::Int64) => {
+                let dst_reg = self.claim_general_reg(dst)?;
+                let src1_reg = self.load_to_general_reg(src1)?;
+                let src2_reg = self.load_to_general_reg(src2)?;
+                ASM::neq_reg64_reg64_reg64(&mut self.buf, dst_reg, src1_reg, src2_reg);
+                Ok(())
+            }
+            x => Err(format!("NumNeq: layout, {:?}, not implemented yet", x)),
+        }
+    }
+
     fn create_struct(
         &mut self,
         sym: &Symbol,

compiler/gen_dev/src/generic64/x86_64.rs

@@ -1096,6 +1096,17 @@ impl Assembler<X86_64GeneralReg, X86_64FloatReg> for X86_64Assembler {
         sete_reg64(buf, dst);
     }
 
+    #[inline(always)]
+    fn neq_reg64_reg64_reg64(
+        buf: &mut Vec<'_, u8>,
+        dst: X86_64GeneralReg,
+        src1: X86_64GeneralReg,
+        src2: X86_64GeneralReg,
+    ) {
+        cmp_reg64_reg64(buf, src1, src2);
+        setne_reg64(buf, dst);
+    }
+
     #[inline(always)]
     fn ret(buf: &mut Vec<'_, u8>) {
         ret(buf);
@@ -1475,6 +1486,26 @@ fn sete_reg64(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg) {
     and_reg64_imm8(buf, reg, 1);
 }
 
+/// `SETNE r/m64` -> Set byte if not equal (ZF=0).
+#[inline(always)]
+fn setne_reg64(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg) {
+    // Follow `sete_reg64` implementation.
+    // Change 94 => 95
+    buf.reserve(7);
+
+    let reg_mod = reg as u8 % 8;
+    use X86_64GeneralReg::*;
+    match reg {
+        RAX | RCX | RDX | RBX => buf.extend(&[0x0F, 0x95, 0xC0 + reg_mod]),
+        RSP | RBP | RSI | RDI => buf.extend(&[REX, 0x0F, 0x95, 0xC0 + reg_mod]),
+        R8 | R9 | R10 | R11 | R12 | R13 | R14 | R15 => {
+            buf.extend(&[REX + 1, 0x0F, 0x95, 0xC0 + reg_mod])
+        }
+    }
+
+    and_reg64_imm8(buf, reg, 1);
+}
+
 /// `RET` -> Near return to calling procedure.
 #[inline(always)]
 fn ret(buf: &mut Vec<'_, u8>) {
@@ -2074,6 +2105,46 @@ mod tests {
         }
     }
 
+    #[test]
+    // follow test_sete_reg64
+    // refer it
+    fn test_setne_reg64() {
+        let arena = bumpalo::Bump::new();
+        let mut buf = bumpalo::vec![in &arena];
+
+        let (reg, expected) = (
+            X86_64GeneralReg::RAX,
+            [
+                0x0F, 0x95, 0xC0, // SETNE al ;
+                0x48, 0x83, 0xE0, 0x01,
+            ],
+        );
+        buf.clear();
+        setne_reg64(&mut buf, reg);
+        assert_eq!(expected, &buf[..]);
+
+        for (reg, expected) in &[
+            (
+                X86_64GeneralReg::RSP,
+                [
+                    // SETNE spl;
+                    0x40, 0x0F, 0x95, 0xC4, 0x48, 0x83, 0xE4, 0x01,
+                ],
+            ),
+            (
+                X86_64GeneralReg::R15,
+                [
+                    // SETNE r15b;
+                    0x41, 0x0F, 0x95, 0xC7, 0x49, 0x83, 0xE7, 0x01,
+                ],
+            ),
+        ] {
+            buf.clear();
+            setne_reg64(&mut buf, *reg);
+            assert_eq!(expected, &buf[..]);
+        }
+    }
+
     #[test]
     fn test_ret() {
         let arena = bumpalo::Bump::new();

compiler/gen_dev/src/lib.rs

@@ -416,6 +416,23 @@ where
                 );
                 self.build_eq(sym, &args[0], &args[1], &arg_layouts[0])
             }
+            LowLevel::NotEq => {
+                debug_assert_eq!(
+                    2,
+                    args.len(),
+                    "NotEq: expected to have exactly two argument"
+                );
+                debug_assert_eq!(
+                    arg_layouts[0], arg_layouts[1],
+                    "NotEq: expected all arguments of to have the same layout"
+                );
+                debug_assert_eq!(
+                    Layout::Builtin(Builtin::Int1),
+                    *ret_layout,
+                    "NotEq: expected to have return layout of type I1"
+                );
+                self.build_neq(sym, &args[0], &args[1], &arg_layouts[0])
+            }
             LowLevel::NumRound => self.build_fn_call(
                 sym,
                 bitcode::NUM_ROUND[FloatWidth::F64].to_string(),
@@ -497,6 +514,15 @@ where
         arg_layout: &Layout<'a>,
     ) -> Result<(), String>;
 
+    /// build_neq stores the result of `src1 != src2` into dst.
+    fn build_neq(
+        &mut self,
+        dst: &Symbol,
+        src1: &Symbol,
+        src2: &Symbol,
+        arg_layout: &Layout<'a>,
+    ) -> Result<(), String>;
+
     /// literal_map gets the map from symbol to literal, used for lazy loading and literal folding.
     fn literal_map(&mut self) -> &mut MutMap<Symbol, Literal<'a>>;
 

compiler/test_gen/src/gen_num.rs

@@ -713,7 +713,7 @@ fn gen_int_eq() {
 }
 
 #[test]
-#[cfg(any(feature = "gen-llvm", feature = "gen-wasm"))]
+#[cfg(any(feature = "gen-llvm", feature = "gen-wasm", feature = "gen-dev"))]
 fn gen_int_neq() {
     assert_evals_to!(
         indoc!(