[wasm-simd][arm64][liftoff] Implement i64x2 signed compares

Bug: v8:11415
Change-Id: I50a805cb97d4d2aadc064da61db2983e0557cf6a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2707771Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72981}

src/wasm/baseline/arm64/liftoff-assembler-arm64.h

@@ -2774,12 +2774,12 @@ void LiftoffAssembler::emit_i64x2_ne(LiftoffRegister dst, LiftoffRegister lhs,
 
 void LiftoffAssembler::emit_i64x2_gt_s(LiftoffRegister dst, LiftoffRegister lhs,
                                        LiftoffRegister rhs) {
-  bailout(kSimd, "i64x2.gt_s");
+  Cmgt(dst.fp().V2D(), lhs.fp().V2D(), rhs.fp().V2D());
 }
 
 void LiftoffAssembler::emit_i64x2_ge_s(LiftoffRegister dst, LiftoffRegister lhs,
                                        LiftoffRegister rhs) {
-  bailout(kSimd, "i64x2.ge_s");
+  Cmge(dst.fp().V2D(), lhs.fp().V2D(), rhs.fp().V2D());
 }
 
 void LiftoffAssembler::emit_f32x4_eq(LiftoffRegister dst, LiftoffRegister lhs,