S390 [simd][liftoff] Implement relaxed fp min/max

Changes for TF instruction selector will be pasted
in the CL comments and will get applied once all
relaxed opcodes have been implemented in codegen/liftoff.

Change-Id: If7250d97398fd99dc2dd59d5d7ce079b99feed43
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3721428
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#81362}

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

@@ -2759,25 +2759,25 @@ void LiftoffAssembler::emit_s128_relaxed_laneselect(LiftoffRegister dst,
 void LiftoffAssembler::emit_f64x2_relaxed_min(LiftoffRegister dst,
                                               LiftoffRegister lhs,
                                               LiftoffRegister rhs) {
-  bailout(kUnsupportedArchitecture, "emit_f64x2_relaxed_min");
+  emit_f64x2_pmin(dst, lhs, rhs);
 }
 
 void LiftoffAssembler::emit_f64x2_relaxed_max(LiftoffRegister dst,
                                               LiftoffRegister lhs,
                                               LiftoffRegister rhs) {
-  bailout(kUnsupportedArchitecture, "emit_f64x2_relaxed_max");
+  emit_f64x2_pmax(dst, lhs, rhs);
 }
 
 void LiftoffAssembler::emit_f32x4_relaxed_min(LiftoffRegister dst,
                                               LiftoffRegister lhs,
                                               LiftoffRegister rhs) {
-  bailout(kUnsupportedArchitecture, "emit_f32x4_relaxed_min");
+  emit_f32x4_pmin(dst, lhs, rhs);
 }
 
 void LiftoffAssembler::emit_f32x4_relaxed_max(LiftoffRegister dst,
                                               LiftoffRegister lhs,
                                               LiftoffRegister rhs) {
-  bailout(kUnsupportedArchitecture, "emit_f32x4_relaxed_max");
+  emit_f32x4_pmax(dst, lhs, rhs);
 }
 
 void LiftoffAssembler::emit_f64x2_convert_low_i32x4_s(LiftoffRegister dst,