whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 27 | |
| 28 | #include <stdlib.h> |
| 29 | |
| 30 | #include "v8.h" |
| 31 | |
| 32 | #include "platform.h" |
| 33 | #include "cctest.h" |
| 34 | #include "diy-fp.h" |
| 35 | |
| 36 | |
| 37 | using namespace v8::internal; |
| 38 | |
| 39 | |
| 40 | TEST(Subtract) { |
| 41 | DiyFp diy_fp1 = DiyFp(3, 0); |
| 42 | DiyFp diy_fp2 = DiyFp(1, 0); |
| 43 | DiyFp diff = DiyFp::Minus(diy_fp1, diy_fp2); |
| 44 | |
| 45 | CHECK(2 == diff.f()); // NOLINT |
| 46 | CHECK_EQ(0, diff.e()); |
| 47 | diy_fp1.Subtract(diy_fp2); |
| 48 | CHECK(2 == diy_fp1.f()); // NOLINT |
| 49 | CHECK_EQ(0, diy_fp1.e()); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | TEST(Multiply) { |
| 54 | DiyFp diy_fp1 = DiyFp(3, 0); |
| 55 | DiyFp diy_fp2 = DiyFp(2, 0); |
| 56 | DiyFp product = DiyFp::Times(diy_fp1, diy_fp2); |
| 57 | |
| 58 | CHECK(0 == product.f()); // NOLINT |
| 59 | CHECK_EQ(64, product.e()); |
| 60 | diy_fp1.Multiply(diy_fp2); |
| 61 | CHECK(0 == diy_fp1.f()); // NOLINT |
| 62 | CHECK_EQ(64, diy_fp1.e()); |
| 63 | |
| 64 | diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x80000000, 00000000), 11); |
| 65 | diy_fp2 = DiyFp(2, 13); |
| 66 | product = DiyFp::Times(diy_fp1, diy_fp2); |
| 67 | CHECK(1 == product.f()); // NOLINT |
| 68 | CHECK_EQ(11 + 13 + 64, product.e()); |
| 69 | |
| 70 | // Test rounding. |
| 71 | diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x80000000, 00000001), 11); |
| 72 | diy_fp2 = DiyFp(1, 13); |
| 73 | product = DiyFp::Times(diy_fp1, diy_fp2); |
| 74 | CHECK(1 == product.f()); // NOLINT |
| 75 | CHECK_EQ(11 + 13 + 64, product.e()); |
| 76 | |
| 77 | diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x7fffffff, ffffffff), 11); |
| 78 | diy_fp2 = DiyFp(1, 13); |
| 79 | product = DiyFp::Times(diy_fp1, diy_fp2); |
| 80 | CHECK(0 == product.f()); // NOLINT |
| 81 | CHECK_EQ(11 + 13 + 64, product.e()); |
| 82 | |
| 83 | // Halfway cases are allowed to round either way. So don't check for it. |
| 84 | |
| 85 | // Big numbers. |
| 86 | diy_fp1 = DiyFp(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFF), 11); |
| 87 | diy_fp2 = DiyFp(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFF), 13); |
| 88 | // 128bit result: 0xfffffffffffffffe0000000000000001 |
| 89 | product = DiyFp::Times(diy_fp1, diy_fp2); |
| 90 | CHECK(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFe) == product.f()); |
| 91 | CHECK_EQ(11 + 13 + 64, product.e()); |
| 92 | } |