[wasm-simd][liftoff][arm][arm64] Implement adds

Implement f64x2.add, i64x2.add, i8x16.add on ARM and ARM64.

Bug: v8:9909
Change-Id: Id41bb3c02c1873e1380463264a3e5fd31949c949
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2103107
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66733}

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

@@ -1567,7 +1567,8 @@ void LiftoffAssembler::emit_f64x2_extract_lane(LiftoffRegister dst,
 
 void LiftoffAssembler::emit_f64x2_add(LiftoffRegister dst, LiftoffRegister lhs,
                                       LiftoffRegister rhs) {
-  bailout(kSimd, "f64x2add");
+  vadd(dst.low_fp(), lhs.low_fp(), rhs.low_fp());
+  vadd(dst.high_fp(), lhs.high_fp(), rhs.high_fp());
 }
 
 void LiftoffAssembler::emit_f32x4_splat(LiftoffRegister dst,
@@ -1604,7 +1605,9 @@ void LiftoffAssembler::emit_i64x2_extract_lane(LiftoffRegister dst,
 
 void LiftoffAssembler::emit_i64x2_add(LiftoffRegister dst, LiftoffRegister lhs,
                                       LiftoffRegister rhs) {
-  bailout(kSimd, "i64x2add");
+  vadd(Neon64, liftoff::GetSimd128Register(dst.low_fp()),
+       liftoff::GetSimd128Register(lhs.low_fp()),
+       liftoff::GetSimd128Register(rhs.low_fp()));
 }
 
 void LiftoffAssembler::emit_i32x4_splat(LiftoffRegister dst,
@@ -1668,7 +1671,9 @@ void LiftoffAssembler::emit_i8x16_extract_lane_s(LiftoffRegister dst,
 
 void LiftoffAssembler::emit_i8x16_add(LiftoffRegister dst, LiftoffRegister lhs,
                                       LiftoffRegister rhs) {
-  bailout(kSimd, "i8x16add");
+  vadd(Neon8, liftoff::GetSimd128Register(dst.low_fp()),
+       liftoff::GetSimd128Register(lhs.low_fp()),
+       liftoff::GetSimd128Register(rhs.low_fp()));
 }
 
 void LiftoffAssembler::StackCheck(Label* ool_code, Register limit_address) {

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

@@ -1097,7 +1097,7 @@ void LiftoffAssembler::emit_f64x2_extract_lane(LiftoffRegister dst,
 
 void LiftoffAssembler::emit_f64x2_add(LiftoffRegister dst, LiftoffRegister lhs,
                                       LiftoffRegister rhs) {
-  bailout(kSimd, "f64x2add");
+  Fadd(dst.fp().V2D(), lhs.fp().V2D(), rhs.fp().V2D());
 }
 
 void LiftoffAssembler::emit_f32x4_splat(LiftoffRegister dst,
@@ -1129,7 +1129,7 @@ void LiftoffAssembler::emit_i64x2_extract_lane(LiftoffRegister dst,
 
 void LiftoffAssembler::emit_i64x2_add(LiftoffRegister dst, LiftoffRegister lhs,
                                       LiftoffRegister rhs) {
-  bailout(kSimd, "i64x2add");
+  Add(dst.fp().V2D(), lhs.fp().V2D(), rhs.fp().V2D());
 }
 
 void LiftoffAssembler::emit_i32x4_splat(LiftoffRegister dst,
@@ -1189,7 +1189,7 @@ void LiftoffAssembler::emit_i8x16_extract_lane_s(LiftoffRegister dst,
 
 void LiftoffAssembler::emit_i8x16_add(LiftoffRegister dst, LiftoffRegister lhs,
                                       LiftoffRegister rhs) {
-  bailout(kSimd, "i8x16add");
+  Add(dst.fp().V16B(), lhs.fp().V16B(), rhs.fp().V16B());
 }
 
 void LiftoffAssembler::StackCheck(Label* ool_code, Register limit_address) {