PPC/s390: [wasm-simd] Prototype relaxed integer Dot product instructions

Port a52b44f0

Original Commit Message:

    Prototype the instruction on the interpreter, and Arm64. Details of
    instruction lowerings on all relevant architectures can be found at:
    https://github.com/WebAssembly/relaxed-simd/issues/52

R=irezvov@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: Ia42e3f7fcb77d5515ee20bb428902cc3ff033f69
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3688290
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80944}

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

@@ -2483,6 +2483,19 @@ void LiftoffAssembler::emit_i16x8_relaxed_q15mulr_s(LiftoffRegister dst,
   bailout(kRelaxedSimd, "emit_i16x8_relaxed_q15mulr_s");
 }
 
+void LiftoffAssembler::emit_i16x8_dot_i8x16_i7x16_s(LiftoffRegister dst,
+                                                    LiftoffRegister lhs,
+                                                    LiftoffRegister rhs) {
+  bailout(kSimd, "emit_i16x8_dot_i8x16_i7x16_s");
+}
+
+void LiftoffAssembler::emit_i32x4_dot_i8x16_i7x16_add_s(LiftoffRegister dst,
+                                                        LiftoffRegister lhs,
+                                                        LiftoffRegister rhs,
+                                                        LiftoffRegister acc) {
+  bailout(kSimd, "emit_i32x4_dot_i8x16_i7x16_add_s");
+}
+
 void LiftoffAssembler::emit_i8x16_shuffle(LiftoffRegister dst,
                                           LiftoffRegister lhs,
                                           LiftoffRegister rhs,

src/wasm/baseline/s390/liftoff-assembler-s390.h

@@ -2838,6 +2838,19 @@ void LiftoffAssembler::emit_i16x8_relaxed_q15mulr_s(LiftoffRegister dst,
   bailout(kRelaxedSimd, "emit_i16x8_relaxed_q15mulr_s");
 }
 
+void LiftoffAssembler::emit_i16x8_dot_i8x16_i7x16_s(LiftoffRegister dst,
+                                                    LiftoffRegister lhs,
+                                                    LiftoffRegister rhs) {
+  bailout(kSimd, "emit_i16x8_dot_i8x16_i7x16_s");
+}
+
+void LiftoffAssembler::emit_i32x4_dot_i8x16_i7x16_add_s(LiftoffRegister dst,
+                                                        LiftoffRegister lhs,
+                                                        LiftoffRegister rhs,
+                                                        LiftoffRegister acc) {
+  bailout(kSimd, "emit_i32x4_dot_i8x16_i7x16_add_s");
+}
+
 void LiftoffAssembler::emit_i8x16_shuffle(LiftoffRegister dst,
                                           LiftoffRegister lhs,
                                           LiftoffRegister rhs,