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Support: Return ScaledNumbers::MaxScale from getQuotient()

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Return MaxScale now that it's available.

llvm-svn: 211559
This commit is contained in:
Duncan P. N. Exon Smith 2014-06-24 00:26:08 +00:00
parent 6ccaf0fa23
commit 339e2238e8
2 changed files with 6 additions and 6 deletions
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4
include/llvm/Support/ScaledNumber.h
View File

@ -148,7 +148,7 @@ std::pair<uint32_t, int16_t> divide32(uint32_t Dividend, uint32_t Divisor);
///
/// Implemented with one 64-bit integer divide/remainder pair.
///
/// Returns \c (DigitsT_MAX, INT16_MAX) for divide-by-zero (0 for 0/0).
/// Returns \c (DigitsT_MAX, MaxScale) for divide-by-zero (0 for 0/0).
template <class DigitsT>
std::pair<DigitsT, int16_t> getQuotient(DigitsT Dividend, DigitsT Divisor) {
static_assert(!std::numeric_limits<DigitsT>::is_signed, "expected unsigned");
@ -159,7 +159,7 @@ std::pair<DigitsT, int16_t> getQuotient(DigitsT Dividend, DigitsT Divisor) {
if (!Dividend)
return std::make_pair(0, 0);
if (!Divisor)
return std::make_pair(std::numeric_limits<DigitsT>::max(), INT16_MAX);
return std::make_pair(std::numeric_limits<DigitsT>::max(), MaxScale);
if (getWidth<DigitsT>() == 64)
return divide64(Dividend, Divisor);

8
unittests/Support/ScaledNumberTest.cpp
View File

@ -137,8 +137,8 @@ TEST(ScaledNumberHelpersTest, getQuotient) {
EXPECT_EQ(SP32(0, 0), getQuotient32(0, 0));
EXPECT_EQ(SP32(0, 0), getQuotient32(0, 1));
EXPECT_EQ(SP32(0, 0), getQuotient32(0, 73));
EXPECT_EQ(SP32(UINT32_MAX, INT16_MAX), getQuotient32(1, 0));
EXPECT_EQ(SP32(UINT32_MAX, INT16_MAX), getQuotient32(6, 0));
EXPECT_EQ(SP32(UINT32_MAX, MaxScale), getQuotient32(1, 0));
EXPECT_EQ(SP32(UINT32_MAX, MaxScale), getQuotient32(6, 0));
// Powers of two.
EXPECT_EQ(SP32(1u << 31, -31), getQuotient32(1, 1));
@ -171,8 +171,8 @@ TEST(ScaledNumberHelpersTest, getQuotient) {
EXPECT_EQ(SP64(0, 0), getQuotient64(0, 0));
EXPECT_EQ(SP64(0, 0), getQuotient64(0, 1));
EXPECT_EQ(SP64(0, 0), getQuotient64(0, 73));
EXPECT_EQ(SP64(UINT64_MAX, INT16_MAX), getQuotient64(1, 0));
EXPECT_EQ(SP64(UINT64_MAX, INT16_MAX), getQuotient64(6, 0));
EXPECT_EQ(SP64(UINT64_MAX, MaxScale), getQuotient64(1, 0));
EXPECT_EQ(SP64(UINT64_MAX, MaxScale), getQuotient64(6, 0));
// Powers of two.
EXPECT_EQ(SP64(1, 0), getQuotient64(1, 1));