S390: Optimize For Mul in TurboFan codegen

src/s390/macro-assembler-s390.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/base/bits.h"
@@ skipping 3679 matching lines @@
   int32_t lo_32 = static_cast<int32_t>(value);
 
   iihf(dst, Operand(hi_32));
   iilf(dst, Operand(lo_32));
 #else
   int value = src.immediate();
   iilf(dst, Operand(value));
 #endif
 }
 
+void MacroAssembler::Mul32(Register dst, const MemOperand& src1) {
+  if (is_uint12(src1.offset())) {
+    ms(dst, src1);
+  } else if (is_int20(src1.offset())) {
+    msy(dst, src1);
+  } else {
+    UNIMPLEMENTED();
+  }
+}
+
+void MacroAssembler::Mul32(Register dst, Register src1) { msr(dst, src1); }
+
+void MacroAssembler::Mul32(Register dst, const Operand& src1) {
+  msfi(dst, src1);
+}
+
+void MacroAssembler::Mul64(Register dst, const MemOperand& src1) {
+  if (is_int20(src1.offset())) {
+    msg(dst, src1);
+  } else {
+    UNIMPLEMENTED();
+  }
+}
+
+void MacroAssembler::Mul64(Register dst, Register src1) { msgr(dst, src1); }
+
+void MacroAssembler::Mul64(Register dst, const Operand& src1) {
+  msgfi(dst, src1);
+}
+
 void MacroAssembler::Mul(Register dst, Register src1, Register src2) {
   if (dst.is(src2)) {
     MulP(dst, src1);
   } else if (dst.is(src1)) {
     MulP(dst, src2);
   } else {
     Move(dst, src1);
     MulP(dst, src2);
   }
 }
@@ skipping 1796 matching lines @@
   }
   if (mag.shift > 0) ShiftRightArith(result, result, Operand(mag.shift));
   ExtractBit(r0, dividend, 31);
   AddP(result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_S390