| Leonard Chan | c03642e | 2018-08-06 16:05:08 | [diff] [blame] | 1 | #include "clang/AST/Type.h" |
| 2 | #include "llvm/ADT/APSInt.h" |
| 3 | #include "llvm/ADT/SmallString.h" |
| 4 | #include "gtest/gtest.h" |
| 5 | |
| 6 | using clang::FixedPointValueToString; |
| 7 | using llvm::APSInt; |
| 8 | using llvm::SmallString; |
| 9 | |
| 10 | namespace { |
| 11 | |
| 12 | TEST(FixedPointString, DifferentTypes) { |
| 13 | SmallString<64> S; |
| 14 | FixedPointValueToString(S, APSInt::get(320), 7); |
| 15 | ASSERT_STREQ(S.c_str(), "2.5"); |
| 16 | |
| 17 | S.clear(); |
| 18 | FixedPointValueToString(S, APSInt::get(0), 7); |
| 19 | ASSERT_STREQ(S.c_str(), "0.0"); |
| 20 | |
| 21 | // signed short _Accum |
| 22 | S.clear(); |
| 23 | FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/false), 7); |
| 24 | ASSERT_STREQ(S.c_str(), "255.9921875"); |
| 25 | |
| 26 | // signed _Accum |
| 27 | S.clear(); |
| 28 | FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/false), 15); |
| 29 | ASSERT_STREQ(S.c_str(), "65535.999969482421875"); |
| 30 | |
| 31 | // signed long _Accum |
| 32 | S.clear(); |
| 33 | FixedPointValueToString(S, APSInt::getMaxValue(64, /*Unsigned=*/false), 31); |
| 34 | ASSERT_STREQ(S.c_str(), "4294967295.9999999995343387126922607421875"); |
| 35 | |
| 36 | // unsigned short _Accum |
| 37 | S.clear(); |
| 38 | FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/true), 8); |
| 39 | ASSERT_STREQ(S.c_str(), "255.99609375"); |
| 40 | |
| 41 | // unsigned _Accum |
| 42 | S.clear(); |
| 43 | FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/true), 16); |
| 44 | ASSERT_STREQ(S.c_str(), "65535.9999847412109375"); |
| 45 | |
| 46 | // unsigned long _Accum |
| 47 | S.clear(); |
| 48 | FixedPointValueToString(S, APSInt::getMaxValue(64, /*Unsigned=*/true), 32); |
| 49 | ASSERT_STREQ(S.c_str(), "4294967295.99999999976716935634613037109375"); |
| 50 | |
| 51 | // signed short _Fract |
| 52 | S.clear(); |
| 53 | FixedPointValueToString(S, APSInt::getMaxValue(8, /*Unsigned=*/false), 7); |
| 54 | ASSERT_STREQ(S.c_str(), "0.9921875"); |
| 55 | |
| 56 | // signed _Fract |
| 57 | S.clear(); |
| 58 | FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/false), 15); |
| 59 | ASSERT_STREQ(S.c_str(), "0.999969482421875"); |
| 60 | |
| 61 | // signed long _Fract |
| 62 | S.clear(); |
| 63 | FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/false), 31); |
| 64 | ASSERT_STREQ(S.c_str(), "0.9999999995343387126922607421875"); |
| 65 | |
| 66 | // unsigned short _Fract |
| 67 | S.clear(); |
| 68 | FixedPointValueToString(S, APSInt::getMaxValue(8, /*Unsigned=*/true), 8); |
| 69 | ASSERT_STREQ(S.c_str(), "0.99609375"); |
| 70 | |
| 71 | // unsigned _Fract |
| 72 | S.clear(); |
| 73 | FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/true), 16); |
| 74 | ASSERT_STREQ(S.c_str(), "0.9999847412109375"); |
| 75 | |
| 76 | // unsigned long _Fract |
| 77 | S.clear(); |
| 78 | FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/true), 32); |
| 79 | ASSERT_STREQ(S.c_str(), "0.99999999976716935634613037109375"); |
| 80 | } |
| 81 | |
| 82 | TEST(FixedPointString, Negative) { |
| 83 | SmallString<64> S; |
| 84 | FixedPointValueToString(S, APSInt::get(-320), 7); |
| 85 | ASSERT_STREQ(S.c_str(), "-2.5"); |
| 86 | |
| 87 | S.clear(); |
| 88 | FixedPointValueToString(S, APSInt::get(-64), 7); |
| 89 | ASSERT_STREQ(S.c_str(), "-0.5"); |
| 90 | |
| 91 | // signed short _Accum |
| 92 | S.clear(); |
| 93 | FixedPointValueToString(S, APSInt::getMinValue(16, /*Unsigned=*/false), 7); |
| 94 | ASSERT_STREQ(S.c_str(), "-256.0"); |
| 95 | |
| 96 | // signed _Accum |
| 97 | S.clear(); |
| 98 | FixedPointValueToString(S, APSInt::getMinValue(32, /*Unsigned=*/false), 15); |
| 99 | ASSERT_STREQ(S.c_str(), "-65536.0"); |
| 100 | |
| 101 | // signed long _Accum |
| 102 | S.clear(); |
| 103 | FixedPointValueToString(S, APSInt::getMinValue(64, /*Unsigned=*/false), 31); |
| 104 | ASSERT_STREQ(S.c_str(), "-4294967296.0"); |
| 105 | } |
| 106 | |
| 107 | } // namespace |
