add tests

Author: bassiounix

libc/test/shared/CMakeLists.txt

@@ -29,6 +29,7 @@ add_fp_unittest(
     libc.src.__support.math.cbrt
     libc.src.__support.math.cbrtf
     libc.src.__support.math.cos
+    libc.src.__support.math.cosf
     libc.src.__support.math.erff
     libc.src.__support.math.exp
     libc.src.__support.math.exp10

libc/test/shared/shared_math_test.cpp

@@ -50,6 +50,7 @@ TEST(LlvmLibcSharedMathTest, AllFloat) {
   EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::atanf(0.0f));
   EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::atanhf(0.0f));
   EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::cbrtf(0.0f));
+  EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::cosf(0.0f));
   EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::erff(0.0f));
   EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::exp10f(0.0f));
   EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::expf(0.0f));