[libc][NFC] Add library of floating point test matchers.

This eliminates UnitTest's dependency on FPUtil and hence prevents
non-math tests from depending indirectly on FPUtil. The patch
essentially moves some of the existing pieces into a library of its own.

Along the way, renamed add_math_unittest to add_fp_unittest.

Reviewed By: lntue

Differential Revision: https://reviews.llvm.org/D85486

1 files changed, 23 insertions, 22 deletions

diff --git a/libc/test/src/math/fmax_test.cpp b/libc/test/src/math/fmax_test.cpp
index 8d1c6c276382..0dc57e4290fc 100644
--- a/libc/test/src/math/fmax_test.cpp
+++ b/libc/test/src/math/fmax_test.cpp
@@ -9,6 +9,7 @@
 #include "include/math.h"
 #include "src/math/fmax.h"
 #include "utils/FPUtil/FPBits.h"
+#include "utils/FPUtil/TestHelpers.h"
 #include "utils/UnitTest/Test.h"
 
 using FPBits = __llvm_libc::fputil::FPBits<double>;
@@ -18,36 +19,36 @@ double inf = FPBits::inf();
 double negInf = FPBits::negInf();
 
 TEST(FmaxTest, NaNArg) {
-  EXPECT_EQ(inf, __llvm_libc::fmax(nan, inf));
-  EXPECT_EQ(negInf, __llvm_libc::fmax(negInf, nan));
-  EXPECT_EQ(0.0, __llvm_libc::fmax(nan, 0.0));
-  EXPECT_EQ(-0.0, __llvm_libc::fmax(-0.0, nan));
-  EXPECT_EQ(-1.2345, __llvm_libc::fmax(nan, -1.2345));
-  EXPECT_EQ(1.2345, __llvm_libc::fmax(1.2345, nan));
+  EXPECT_FP_EQ(inf, __llvm_libc::fmax(nan, inf));
+  EXPECT_FP_EQ(negInf, __llvm_libc::fmax(negInf, nan));
+  EXPECT_FP_EQ(0.0, __llvm_libc::fmax(nan, 0.0));
+  EXPECT_FP_EQ(-0.0, __llvm_libc::fmax(-0.0, nan));
+  EXPECT_FP_EQ(-1.2345, __llvm_libc::fmax(nan, -1.2345));
+  EXPECT_FP_EQ(1.2345, __llvm_libc::fmax(1.2345, nan));
   EXPECT_NE(isnan(__llvm_libc::fmax(nan, nan)), 0);
 }
 
 TEST(FmaxTest, InfArg) {
-  EXPECT_EQ(inf, __llvm_libc::fmax(negInf, inf));
-  EXPECT_EQ(inf, __llvm_libc::fmax(inf, 0.0));
-  EXPECT_EQ(inf, __llvm_libc::fmax(-0.0, inf));
-  EXPECT_EQ(inf, __llvm_libc::fmax(inf, 1.2345));
-  EXPECT_EQ(inf, __llvm_libc::fmax(-1.2345, inf));
+  EXPECT_FP_EQ(inf, __llvm_libc::fmax(negInf, inf));
+  EXPECT_FP_EQ(inf, __llvm_libc::fmax(inf, 0.0));
+  EXPECT_FP_EQ(inf, __llvm_libc::fmax(-0.0, inf));
+  EXPECT_FP_EQ(inf, __llvm_libc::fmax(inf, 1.2345));
+  EXPECT_FP_EQ(inf, __llvm_libc::fmax(-1.2345, inf));
 }
 
 TEST(FmaxTest, NegInfArg) {
-  EXPECT_EQ(inf, __llvm_libc::fmax(inf, negInf));
-  EXPECT_EQ(0.0, __llvm_libc::fmax(negInf, 0.0));
-  EXPECT_EQ(-0.0, __llvm_libc::fmax(-0.0, negInf));
-  EXPECT_EQ(-1.2345, __llvm_libc::fmax(negInf, -1.2345));
-  EXPECT_EQ(1.2345, __llvm_libc::fmax(1.2345, negInf));
+  EXPECT_FP_EQ(inf, __llvm_libc::fmax(inf, negInf));
+  EXPECT_FP_EQ(0.0, __llvm_libc::fmax(negInf, 0.0));
+  EXPECT_FP_EQ(-0.0, __llvm_libc::fmax(-0.0, negInf));
+  EXPECT_FP_EQ(-1.2345, __llvm_libc::fmax(negInf, -1.2345));
+  EXPECT_FP_EQ(1.2345, __llvm_libc::fmax(1.2345, negInf));
 }
 
 TEST(FmaxTest, BothZero) {
-  EXPECT_EQ(0.0, __llvm_libc::fmax(0.0, 0.0));
-  EXPECT_EQ(0.0, __llvm_libc::fmax(-0.0, 0.0));
-  EXPECT_EQ(0.0, __llvm_libc::fmax(0.0, -0.0));
-  EXPECT_EQ(-0.0, __llvm_libc::fmax(-0.0, -0.0));
+  EXPECT_FP_EQ(0.0, __llvm_libc::fmax(0.0, 0.0));
+  EXPECT_FP_EQ(0.0, __llvm_libc::fmax(-0.0, 0.0));
+  EXPECT_FP_EQ(0.0, __llvm_libc::fmax(0.0, -0.0));
+  EXPECT_FP_EQ(-0.0, __llvm_libc::fmax(-0.0, -0.0));
 }
 
 TEST(FmaxTest, InDoubleRange) {
@@ -65,9 +66,9 @@ TEST(FmaxTest, InDoubleRange) {
       continue;
 
     if (x > y) {
-      ASSERT_EQ(x, __llvm_libc::fmax(x, y));
+      EXPECT_FP_EQ(x, __llvm_libc::fmax(x, y));
     } else {
-      ASSERT_EQ(y, __llvm_libc::fmax(x, y));
+      EXPECT_FP_EQ(y, __llvm_libc::fmax(x, y));
     }
   }
 }