ARM: Improved double to integer truncation....

test/cctest/test-assembler-arm.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 214 matching lines @@
   typedef struct {
     double a;
     double b;
     double c;
     double d;
     double e;
     double f;
     double g;
     double h;
     int i;
+    double m;
+    double n;
     float x;
     float y;
   } T;
   T t;
 
   // Create a function that accepts &t, and loads, manipulates, and stores
   // the doubles and floats.
   Assembler assm(NULL, 0);
   Label L, C;
 
@@ skipping 45 matching lines @@
     __ vstr(d4, r4, OFFSET_OF(T, f));
 
     // Test vabs.
     __ vldr(d1, r4, OFFSET_OF(T, g));
     __ vabs(d0, d1);
     __ vstr(d0, r4, OFFSET_OF(T, g));
     __ vldr(d2, r4, OFFSET_OF(T, h));
     __ vabs(d0, d2);
     __ vstr(d0, r4, OFFSET_OF(T, h));
 
+    // Test vneg.
+    __ vldr(d1, r4, OFFSET_OF(T, m));
+    __ vneg(d0, d1);
+    __ vstr(d0, r4, OFFSET_OF(T, m));
+    __ vldr(d1, r4, OFFSET_OF(T, n));
+    __ vneg(d0, d1);
+    __ vstr(d0, r4, OFFSET_OF(T, n));
+
     __ ldm(ia_w, sp, r4.bit() | fp.bit() | pc.bit());
 
     CodeDesc desc;
     assm.GetCode(&desc);
     Object* code = Heap::CreateCode(
         desc,
         Code::ComputeFlags(Code::STUB),
         Handle<Object>(Heap::undefined_value()))->ToObjectChecked();
     CHECK(code->IsCode());
 #ifdef DEBUG
     Code::cast(code)->Print();
 #endif
     F3 f = FUNCTION_CAST<F3>(Code::cast(code)->entry());
     t.a = 1.5;
     t.b = 2.75;
     t.c = 17.17;
     t.d = 0.0;
     t.e = 0.0;
     t.f = 0.0;
     t.g = -2718.2818;
     t.h = 31415926.5;
     t.i = 0;
+    t.m = -2718.2818;
+    t.n = 123.456;
     t.x = 4.5;
     t.y = 9.0;
     Object* dummy = CALL_GENERATED_CODE(f, &t, 0, 0, 0, 0);
     USE(dummy);
     CHECK_EQ(4.5, t.y);
     CHECK_EQ(9.0, t.x);
+    CHECK_EQ(-123.456, t.n);
+    CHECK_EQ(2718.2818, t.m);
     CHECK_EQ(2, t.i);
     CHECK_EQ(2718.2818, t.g);
     CHECK_EQ(31415926.5, t.h);
     CHECK_EQ(42.0, t.f);
     CHECK_EQ(1.0, t.e);
     CHECK_EQ(1.000000059604644775390625, t.d);
     CHECK_EQ(4.25, t.c);
     CHECK_EQ(4.25, t.b);
     CHECK_EQ(1.5, t.a);
   }
@@ skipping 250 matching lines @@
   TestRoundingMode(u32_f64, RN, static_cast<double>(kMaxInt), kMaxInt);
   TestRoundingMode(u32_f64, RN, (kMaxInt + 0.49), kMaxInt);
   TestRoundingMode(u32_f64, RN, (kMaxInt + 0.5),
                                 static_cast<uint32_t>(kMaxInt) + 1);
   TestRoundingMode(u32_f64, RN, (kMaxUInt + 0.49), kMaxUInt);
   TestRoundingMode(u32_f64, RN, (kMaxUInt + 0.5), kMaxUInt, true);
   TestRoundingMode(u32_f64, RN, (kMaxUInt + 1.0), kMaxUInt, true);
 }
 
 #undef __