S390 [Crankshaft]: Use LoadPositive for MathAbs

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 4114 matching lines @@
   lgf(dst, opnd);  // 64<-32
 #else
   if (is_uint12(opnd.offset())) {
     l(dst, opnd);
   } else {
     ly(dst, opnd);
   }
 #endif
 }
 
+void MacroAssembler::LoadPositiveP(Register result, Register input) {
+#if V8_TARGET_ARCH_S390X
+  lpgr(result, input);
+#else
+  lpr(result, input);
+#endif
+}
+
+void MacroAssembler::LoadPositive32(Register result, Register input) {
+  lpr(result, input);
+  lgfr(result, result);
+}
+
 //-----------------------------------------------------------------------------
 //  Compare Helpers
 //-----------------------------------------------------------------------------
 
 // Compare 32-bit Register vs Register
 void MacroAssembler::Cmp32(Register src1, Register src2) { cr_z(src1, src2); }
 
 // Compare Pointer Sized Register vs Register
 void MacroAssembler::CmpP(Register src1, Register src2) {
 #if V8_TARGET_ARCH_S390X
@@ skipping 935 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