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Edit File: test-diy-fp.cc
// Copyright 2006-2008 the V8 project authors. All rights reserved. #include <stdlib.h> #include "v8.h" #include "platform.h" #include "cctest.h" #include "diy-fp.h" using namespace v8::internal; TEST(Subtract) { DiyFp diy_fp1 = DiyFp(3, 0); DiyFp diy_fp2 = DiyFp(1, 0); DiyFp diff = DiyFp::Minus(diy_fp1, diy_fp2); CHECK(2 == diff.f()); // NOLINT CHECK_EQ(0, diff.e()); diy_fp1.Subtract(diy_fp2); CHECK(2 == diy_fp1.f()); // NOLINT CHECK_EQ(0, diy_fp1.e()); } TEST(Multiply) { DiyFp diy_fp1 = DiyFp(3, 0); DiyFp diy_fp2 = DiyFp(2, 0); DiyFp product = DiyFp::Times(diy_fp1, diy_fp2); CHECK(0 == product.f()); // NOLINT CHECK_EQ(64, product.e()); diy_fp1.Multiply(diy_fp2); CHECK(0 == diy_fp1.f()); // NOLINT CHECK_EQ(64, diy_fp1.e()); diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x80000000, 00000000), 11); diy_fp2 = DiyFp(2, 13); product = DiyFp::Times(diy_fp1, diy_fp2); CHECK(1 == product.f()); // NOLINT CHECK_EQ(11 + 13 + 64, product.e()); // Test rounding. diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x80000000, 00000001), 11); diy_fp2 = DiyFp(1, 13); product = DiyFp::Times(diy_fp1, diy_fp2); CHECK(1 == product.f()); // NOLINT CHECK_EQ(11 + 13 + 64, product.e()); diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x7fffffff, ffffffff), 11); diy_fp2 = DiyFp(1, 13); product = DiyFp::Times(diy_fp1, diy_fp2); CHECK(0 == product.f()); // NOLINT CHECK_EQ(11 + 13 + 64, product.e()); // Halfway cases are allowed to round either way. So don't check for it. // Big numbers. diy_fp1 = DiyFp(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFF), 11); diy_fp2 = DiyFp(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFF), 13); // 128bit result: 0xfffffffffffffffe0000000000000001 product = DiyFp::Times(diy_fp1, diy_fp2); CHECK(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFe) == product.f()); CHECK_EQ(11 + 13 + 64, product.e()); }