[wasm-simd][liftoff][arm][arm64] Implement saturating rounding multiply high

Bug: v8:10971
Change-Id: I5650458501f548f8120bcc15fbeb9cd220e3e137
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2621861
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72072}

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

@@ -3320,7 +3320,9 @@ void LiftoffAssembler::emit_i16x8_extmul_high_i8x16_u(LiftoffRegister dst,
 void LiftoffAssembler::emit_i16x8_q15mulr_sat_s(LiftoffRegister dst,
                                                 LiftoffRegister src1,
                                                 LiftoffRegister src2) {
-  bailout(kSimd, "i16x8_q15mulr_sat_s");
+  vqrdmulh(NeonS16, liftoff::GetSimd128Register(dst),
+           liftoff::GetSimd128Register(src1),
+           liftoff::GetSimd128Register(src2));
 }
 
 void LiftoffAssembler::emit_i8x16_shuffle(LiftoffRegister dst,

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

@@ -2907,7 +2907,7 @@ void LiftoffAssembler::emit_i16x8_extmul_high_i8x16_u(LiftoffRegister dst,
 void LiftoffAssembler::emit_i16x8_q15mulr_sat_s(LiftoffRegister dst,
                                                 LiftoffRegister src1,
                                                 LiftoffRegister src2) {
-  bailout(kSimd, "i16x8_q15mulr_sat_s");
+  Sqrdmulh(dst.fp().V8H(), src1.fp().V8H(), src2.fp().V8H());
 }
 
 void LiftoffAssembler::emit_i32x4_abs(LiftoffRegister dst,