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[libc][obvious] Fix x86 long double conversion to integer.

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Fixes incorrectly constructed ceill tests.
This commit is contained in:
Siva Chandra Reddy
2020-08-19 14:44:23 -07:00
parent dac0b1d330
commit e2645488ca
2 changed files with 12 additions and 12 deletions
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20
libc/test/src/math/ceill_test.cpp
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@@ -47,25 +47,25 @@ TEST(CeillTest, RoundedNumbers) {
}
TEST(CeillTest, Fractions) {
EXPECT_FP_EQ(0.0l, __llvm_libc::ceill(0.5l));
EXPECT_FP_EQ(1.0l, __llvm_libc::ceill(0.5l));
EXPECT_FP_EQ(-0.0l, __llvm_libc::ceill(-0.5l));
EXPECT_FP_EQ(0.0l, __llvm_libc::ceill(0.115l));
EXPECT_FP_EQ(1.0l, __llvm_libc::ceill(0.115l));
EXPECT_FP_EQ(-0.0l, __llvm_libc::ceill(-0.115l));
EXPECT_FP_EQ(0.0l, __llvm_libc::ceill(0.715l));
EXPECT_FP_EQ(1.0l, __llvm_libc::ceill(0.715l));
EXPECT_FP_EQ(-0.0l, __llvm_libc::ceill(-0.715l));
EXPECT_FP_EQ(1.0l, __llvm_libc::ceill(1.3l));
EXPECT_FP_EQ(2.0l, __llvm_libc::ceill(1.3l));
EXPECT_FP_EQ(-1.0l, __llvm_libc::ceill(-1.3l));
EXPECT_FP_EQ(1.0l, __llvm_libc::ceill(1.5l));
EXPECT_FP_EQ(2.0l, __llvm_libc::ceill(1.5l));
EXPECT_FP_EQ(-1.0l, __llvm_libc::ceill(-1.5l));
EXPECT_FP_EQ(1.0l, __llvm_libc::ceill(1.75l));
EXPECT_FP_EQ(2.0l, __llvm_libc::ceill(1.75l));
EXPECT_FP_EQ(-1.0l, __llvm_libc::ceill(-1.75l));
EXPECT_FP_EQ(10.0l, __llvm_libc::ceill(10.32l));
EXPECT_FP_EQ(11.0l, __llvm_libc::ceill(10.32l));
EXPECT_FP_EQ(-10.0l, __llvm_libc::ceill(-10.32l));
EXPECT_FP_EQ(10.0l, __llvm_libc::ceill(10.65l));
EXPECT_FP_EQ(11.0l, __llvm_libc::ceill(10.65l));
EXPECT_FP_EQ(-10.0l, __llvm_libc::ceill(-10.65l));
EXPECT_FP_EQ(1234.0l, __llvm_libc::ceill(1234.38l));
EXPECT_FP_EQ(1235.0l, __llvm_libc::ceill(1234.38l));
EXPECT_FP_EQ(-1234.0l, __llvm_libc::ceill(-1234.38l));
EXPECT_FP_EQ(1234.0l, __llvm_libc::ceill(1234.96l));
EXPECT_FP_EQ(1235.0l, __llvm_libc::ceill(1234.96l));
EXPECT_FP_EQ(-1234.0l, __llvm_libc::ceill(-1234.96l));
}

4
libc/utils/FPUtil/LongDoubleBitsX86.h
View File

@@ -96,8 +96,8 @@ template <> struct __attribute__((packed)) FPBits<long double> {
// there can be garbage bits in the padding. So, we zero the padding bits
// in |result|.
static constexpr UIntType mask =
(UIntType(1) << (sizeof(long double) -
Padding<sizeof(uintptr_t)>::value / 8)) -
(UIntType(1) << (sizeof(long double) * 8 -
Padding<sizeof(uintptr_t)>::value)) -
1;
return result & mask;
}