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1. Fix some indentation and variable names in the get{Min,Max}Value methods.

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2. Implement toString for power-of-2 radix without using divide and always
   printing full words. This allows hex/binary to look at the bit
   respresentation of the APInt as well as avoid bugs in divide.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34396 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-02-18 22:29:05 +00:00
parent 4a6f363491
commit f99a0ac0dc
1 changed files with 24 additions and 8 deletions
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32
lib/Support/APInt.cpp
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@ -675,8 +675,22 @@ std::string APInt::toString(uint8_t radix, bool wantSigned) const {
return result;
}
if (radix != 10) {
uint64_t mask = radix - 1;
uint32_t shift = (radix == 16 ? 4 : radix == 8 ? 3 : 1);
uint32_t nibbles = APINT_BITS_PER_WORD / shift;
for (uint32_t i = 0; i < getNumWords(); ++i) {
uint64_t value = pVal[i];
for (uint32_t j = 0; j < nibbles; ++j) {
result.insert(0, digits[ value & mask ]);
value >>= shift;
}
}
return result;
}
APInt tmp(*this);
APInt divisor(tmp.getBitWidth(), radix);
APInt divisor(tmp.getBitWidth(), 10);
APInt zero(tmp.getBitWidth(), 0);
size_t insert_at = 0;
if (wantSigned && tmp[BitWidth-1]) {
@ -705,19 +719,21 @@ std::string APInt::toString(uint8_t radix, bool wantSigned) const {
/// for an APInt of the specified bit-width and if isSign == true,
/// it should be largest signed value, otherwise unsigned value.
APInt APInt::getMaxValue(uint32_t numBits, bool isSign) {
APInt APIVal(numBits, 0);
APIVal.set();
if (isSign) APIVal.clear(numBits - 1);
return APIVal;
APInt Result(numBits, 0);
Result.set();
if (isSign)
Result.clear(numBits - 1);
return Result;
}
/// getMinValue - This function returns the smallest value for
/// an APInt of the given bit-width and if isSign == true,
/// it should be smallest signed value, otherwise zero.
APInt APInt::getMinValue(uint32_t numBits, bool isSign) {
APInt APIVal(numBits, 0);
if (isSign) APIVal.set(numBits - 1);
return APIVal;
APInt Result(numBits, 0);
if (isSign)
Result.set(numBits - 1);
return Result;
}
/// getAllOnesValue - This function returns an all-ones value for