ARM: Add support for DoMathAbs with double inputs....

test/cctest/test-assembler-arm.cc

Index: test/cctest/test-assembler-arm.cc
===================================================================
--- test/cctest/test-assembler-arm.cc	(revision 6524)
+++ test/cctest/test-assembler-arm.cc	(working copy)
@@ -229,6 +229,8 @@
     double d;
     double e;
     double f;
+    double g;
+    double h;
     int i;
     float x;
     float y;
@@ -286,6 +288,15 @@
     __ vmov(s31, lr);
     __ vcvt_f64_s32(d4, s31);
     __ 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));
+
     __ ldm(ia_w, sp, r4.bit() | fp.bit() | pc.bit());
 
     CodeDesc desc;
@@ -305,6 +316,8 @@
     t.d = 0.0;
     t.e = 0.0;
     t.f = 0.0;
+    t.g = -2718.2818;
+    t.h = 31415926.5;
     t.i = 0;
     t.x = 4.5;
     t.y = 9.0;
@@ -313,6 +326,8 @@
     CHECK_EQ(4.5, t.y);
     CHECK_EQ(9.0, t.x);
     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);