21 changes: 14 additions & 7 deletions libc/test/src/math/expf_test.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -57,11 +57,13 @@ TEST(LlvmLibcExpfTest, Underflow) {
EXPECT_MATH_ERRNO(ERANGE);

float x = float(FPBits(0xc2cffff8U));
EXPECT_MPFR_MATCH(mpfr::Operation::Exp, x, __llvm_libc::expf(x), 1.0);
EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp, x, __llvm_libc::expf(x),
0.5);
EXPECT_MATH_ERRNO(ERANGE);

x = float(FPBits(0xc2d00008U));
EXPECT_MPFR_MATCH(mpfr::Operation::Exp, x, __llvm_libc::expf(x), 1.0);
EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp, x, __llvm_libc::expf(x),
0.5);
EXPECT_MATH_ERRNO(ERANGE);
}

Expand All @@ -72,19 +74,23 @@ TEST(LlvmLibcExpfTest, Borderline) {

errno = 0;
x = float(FPBits(0x42affff8U));
ASSERT_MPFR_MATCH(mpfr::Operation::Exp, x, __llvm_libc::expf(x), 1.0);
ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp, x, __llvm_libc::expf(x),
0.5);
EXPECT_MATH_ERRNO(0);

x = float(FPBits(0x42b00008U));
ASSERT_MPFR_MATCH(mpfr::Operation::Exp, x, __llvm_libc::expf(x), 1.0);
ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp, x, __llvm_libc::expf(x),
0.5);
EXPECT_MATH_ERRNO(0);

x = float(FPBits(0xc2affff8U));
ASSERT_MPFR_MATCH(mpfr::Operation::Exp, x, __llvm_libc::expf(x), 1.0);
ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp, x, __llvm_libc::expf(x),
0.5);
EXPECT_MATH_ERRNO(0);

x = float(FPBits(0xc2b00008U));
ASSERT_MPFR_MATCH(mpfr::Operation::Exp, x, __llvm_libc::expf(x), 1.0);
ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp, x, __llvm_libc::expf(x),
0.5);
EXPECT_MATH_ERRNO(0);
}

Expand All @@ -104,6 +110,7 @@ TEST(LlvmLibcExpfTest, InFloatRange) {
// wider precision.
if (isnan(result) || isinf(result) || errno != 0)
continue;
ASSERT_MPFR_MATCH(mpfr::Operation::Exp, x, __llvm_libc::expf(x), 1.0);
EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp, x,
__llvm_libc::expf(x), 0.5);
}
}