//===----------------------------------------------------------------------===//
#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/FoldingSet.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include <cstring>
unsigned int arithmeticOK;
};
+ const fltSemantics APFloat::IEEEhalf = { 15, -14, 11, true };
const fltSemantics APFloat::IEEEsingle = { 127, -126, 24, true };
const fltSemantics APFloat::IEEEdouble = { 1023, -1022, 53, true };
const fltSemantics APFloat::IEEEquad = { 16383, -16382, 113, true };
If the exponent overflows, returns a large exponent with the
appropriate sign. */
static int
-readExponent(const char *p)
+readExponent(StringRef::iterator begin, StringRef::iterator end)
{
bool isNegative;
unsigned int absExponent;
const unsigned int overlargeExponent = 24000; /* FIXME. */
+ StringRef::iterator p = begin;
+
+ assert(p != end && "Exponent has no digits");
isNegative = (*p == '-');
- if (*p == '-' || *p == '+')
+ if (*p == '-' || *p == '+') {
p++;
+ assert(p != end && "Exponent has no digits");
+ }
absExponent = decDigitValue(*p++);
- assert (absExponent < 10U);
+ assert(absExponent < 10U && "Invalid character in exponent");
- for (;;) {
+ for (; p != end; ++p) {
unsigned int value;
value = decDigitValue(*p);
- if (value >= 10U)
- break;
+ assert(value < 10U && "Invalid character in exponent");
- p++;
value += absExponent * 10;
if (absExponent >= overlargeExponent) {
absExponent = overlargeExponent;
absExponent = value;
}
+ assert(p == end && "Invalid exponent in exponent");
+
if (isNegative)
return -(int) absExponent;
else
/* This is ugly and needs cleaning up, but I don't immediately see
how whilst remaining safe. */
static int
-totalExponent(const char *p, int exponentAdjustment)
+totalExponent(StringRef::iterator p, StringRef::iterator end,
+ int exponentAdjustment)
{
int unsignedExponent;
bool negative, overflow;
int exponent;
- /* Move past the exponent letter and sign to the digits. */
- p++;
+ assert(p != end && "Exponent has no digits");
+
negative = *p == '-';
- if(*p == '-' || *p == '+')
+ if(*p == '-' || *p == '+') {
p++;
+ assert(p != end && "Exponent has no digits");
+ }
unsignedExponent = 0;
overflow = false;
- for(;;) {
+ for(; p != end; ++p) {
unsigned int value;
value = decDigitValue(*p);
- if(value >= 10U)
- break;
+ assert(value < 10U && "Invalid character in exponent");
- p++;
unsignedExponent = unsignedExponent * 10 + value;
if(unsignedExponent > 65535)
overflow = true;
return exponent;
}
-static const char *
-skipLeadingZeroesAndAnyDot(const char *p, const char **dot)
+static StringRef::iterator
+skipLeadingZeroesAndAnyDot(StringRef::iterator begin, StringRef::iterator end,
+ StringRef::iterator *dot)
{
- *dot = 0;
- while(*p == '0')
+ StringRef::iterator p = begin;
+ *dot = end;
+ while(*p == '0' && p != end)
p++;
if(*p == '.') {
*dot = p++;
- while(*p == '0')
+
+ assert(end - begin != 1 && "Significand has no digits");
+
+ while(*p == '0' && p != end)
p++;
}
};
static void
-interpretDecimal(const char *p, decimalInfo *D)
+interpretDecimal(StringRef::iterator begin, StringRef::iterator end,
+ decimalInfo *D)
{
- const char *dot;
-
- p = skipLeadingZeroesAndAnyDot (p, &dot);
+ StringRef::iterator dot = end;
+ StringRef::iterator p = skipLeadingZeroesAndAnyDot (begin, end, &dot);
D->firstSigDigit = p;
D->exponent = 0;
D->normalizedExponent = 0;
- for (;;) {
+ for (; p != end; ++p) {
if (*p == '.') {
- assert(dot == 0);
+ assert(dot == end && "String contains multiple dots");
dot = p++;
+ if (p == end)
+ break;
}
if (decDigitValue(*p) >= 10U)
break;
- p++;
}
- /* If number is all zerooes accept any exponent. */
- if (p != D->firstSigDigit) {
- if (*p == 'e' || *p == 'E')
- D->exponent = readExponent(p + 1);
+ if (p != end) {
+ assert((*p == 'e' || *p == 'E') && "Invalid character in significand");
+ assert(p != begin && "Significand has no digits");
+ assert((dot == end || p - begin != 1) && "Significand has no digits");
+
+ /* p points to the first non-digit in the string */
+ D->exponent = readExponent(p + 1, end);
/* Implied decimal point? */
- if (!dot)
+ if (dot == end)
dot = p;
+ }
+ /* If number is all zeroes accept any exponent. */
+ if (p != D->firstSigDigit) {
/* Drop insignificant trailing zeroes. */
- do
+ if (p != begin) {
do
- p--;
- while (*p == '0');
- while (*p == '.');
+ do
+ p--;
+ while (p != begin && *p == '0');
+ while (p != begin && *p == '.');
+ }
/* Adjust the exponents for any decimal point. */
D->exponent += static_cast<exponent_t>((dot - p) - (dot > p));
DIGITVALUE is the first hex digit of the fraction, P points to
the next digit. */
static lostFraction
-trailingHexadecimalFraction(const char *p, unsigned int digitValue)
+trailingHexadecimalFraction(StringRef::iterator p, StringRef::iterator end,
+ unsigned int digitValue)
{
unsigned int hexDigit;
while(*p == '0')
p++;
+ assert(p != end && "Invalid trailing hexadecimal fraction!");
+
hexDigit = hexDigitValue(*p);
/* If we ran off the end it is exactly zero or one-half, otherwise
unsigned int count, partBits;
integerPart part, boundary;
- assert (bits != 0);
+ assert(bits != 0);
bits--;
count = bits / integerPartWidth;
{
static const integerPart firstEightPowers[] = { 1, 5, 25, 125, 625, 3125,
15625, 78125 };
- static integerPart pow5s[maxPowerOfFiveParts * 2 + 5] = { 78125 * 5 };
- static unsigned int partsCount[16] = { 1 };
-
+ integerPart pow5s[maxPowerOfFiveParts * 2 + 5];
+ pow5s[0] = 78125 * 5;
+
+ unsigned int partsCount[16] = { 1 };
integerPart scratch[maxPowerOfFiveParts], *p1, *p2, *pow5;
unsigned int result;
-
assert(power <= maxExponent);
p1 = dst;
{
unsigned int result = count;
- assert (count != 0 && count <= integerPartWidth / 4);
+ assert(count != 0 && count <= integerPartWidth / 4);
part >>= (integerPartWidth - 4 * count);
while (count--) {
/* Make this number a NaN, with an arbitrary but deterministic value
for the significand. If double or longer, this is a signalling NaN,
- which may not be ideal. */
+ which may not be ideal. If float, this is QNaN(0). */
void
-APFloat::makeNaN(void)
+APFloat::makeNaN(unsigned type)
{
category = fcNaN;
- APInt::tcSet(significandParts(), ~0U, partCount());
+ // FIXME: Add double and long double support for QNaN(0).
+ if (semantics->precision == 24 && semantics->maxExponent == 127) {
+ type |= 0x7fc00000U;
+ type &= ~0x80000000U;
+ } else
+ type = ~0U;
+ APInt::tcSet(significandParts(), type, partCount());
}
APFloat &
normalize(rmNearestTiesToEven, lfExactlyZero);
}
+APFloat::APFloat(const fltSemantics &ourSemantics) {
+ assertArithmeticOK(ourSemantics);
+ initialize(&ourSemantics);
+ category = fcZero;
+ sign = false;
+}
+
+
APFloat::APFloat(const fltSemantics &ourSemantics,
- fltCategory ourCategory, bool negative)
+ fltCategory ourCategory, bool negative, unsigned type)
{
assertArithmeticOK(ourSemantics);
initialize(&ourSemantics);
category = ourCategory;
sign = negative;
- if(category == fcNormal)
+ if (category == fcNormal)
category = fcZero;
else if (ourCategory == fcNaN)
- makeNaN();
+ makeNaN(type);
}
-APFloat::APFloat(const fltSemantics &ourSemantics, const char *text)
+APFloat::APFloat(const fltSemantics &ourSemantics, const StringRef& text)
{
assertArithmeticOK(ourSemantics);
initialize(&ourSemantics);
{
assert(category == fcNormal || category == fcNaN);
- if(partCount() > 1)
+ if (partCount() > 1)
return significand.parts;
else
return &significand.part;
/* Current callers never pass this so we don't handle it. */
assert(lost_fraction != lfExactlyZero);
- switch(rounding_mode) {
+ switch (rounding_mode) {
default:
- assert(0);
+ llvm_unreachable(0);
case rmNearestTiesToAway:
return lost_fraction == lfExactlyHalf || lost_fraction == lfMoreThanHalf;
APFloat::opStatus
APFloat::addOrSubtractSpecials(const APFloat &rhs, bool subtract)
{
- switch(convolve(category, rhs.category)) {
+ switch (convolve(category, rhs.category)) {
default:
- assert(0);
+ llvm_unreachable(0);
case convolve(fcNaN, fcZero):
case convolve(fcNaN, fcNormal):
APFloat::opStatus
APFloat::multiplySpecials(const APFloat &rhs)
{
- switch(convolve(category, rhs.category)) {
+ switch (convolve(category, rhs.category)) {
default:
- assert(0);
+ llvm_unreachable(0);
case convolve(fcNaN, fcZero):
case convolve(fcNaN, fcNormal):
APFloat::opStatus
APFloat::divideSpecials(const APFloat &rhs)
{
- switch(convolve(category, rhs.category)) {
+ switch (convolve(category, rhs.category)) {
default:
- assert(0);
+ llvm_unreachable(0);
case convolve(fcNaN, fcZero):
case convolve(fcNaN, fcNormal):
APFloat::opStatus
APFloat::modSpecials(const APFloat &rhs)
{
- switch(convolve(category, rhs.category)) {
+ switch (convolve(category, rhs.category)) {
default:
- assert(0);
+ llvm_unreachable(0);
case convolve(fcNaN, fcZero):
case convolve(fcNaN, fcNormal):
assertArithmeticOK(*semantics);
assert(semantics == rhs.semantics);
- switch(convolve(category, rhs.category)) {
+ switch (convolve(category, rhs.category)) {
default:
- assert(0);
+ llvm_unreachable(0);
case convolve(fcNaN, fcZero):
case convolve(fcNaN, fcNormal):
}
APFloat::opStatus
-APFloat::convertFromHexadecimalString(const char *p,
+APFloat::convertFromHexadecimalString(const StringRef &s,
roundingMode rounding_mode)
{
- lostFraction lost_fraction;
+ lostFraction lost_fraction = lfExactlyZero;
integerPart *significand;
unsigned int bitPos, partsCount;
- const char *dot, *firstSignificantDigit;
+ StringRef::iterator dot, firstSignificantDigit;
zeroSignificand();
exponent = 0;
bitPos = partsCount * integerPartWidth;
/* Skip leading zeroes and any (hexa)decimal point. */
- p = skipLeadingZeroesAndAnyDot(p, &dot);
+ StringRef::iterator begin = s.begin();
+ StringRef::iterator end = s.end();
+ StringRef::iterator p = skipLeadingZeroesAndAnyDot(begin, end, &dot);
firstSignificantDigit = p;
- for(;;) {
+ for(; p != end;) {
integerPart hex_value;
if(*p == '.') {
- assert(dot == 0);
+ assert(dot == end && "String contains multiple dots");
dot = p++;
+ if (p == end) {
+ break;
+ }
}
hex_value = hexDigitValue(*p);
if(hex_value == -1U) {
- lost_fraction = lfExactlyZero;
break;
}
p++;
- /* Store the number whilst 4-bit nibbles remain. */
- if(bitPos) {
- bitPos -= 4;
- hex_value <<= bitPos % integerPartWidth;
- significand[bitPos / integerPartWidth] |= hex_value;
- } else {
- lost_fraction = trailingHexadecimalFraction(p, hex_value);
- while(hexDigitValue(*p) != -1U)
- p++;
+ if (p == end) {
break;
+ } else {
+ /* Store the number whilst 4-bit nibbles remain. */
+ if(bitPos) {
+ bitPos -= 4;
+ hex_value <<= bitPos % integerPartWidth;
+ significand[bitPos / integerPartWidth] |= hex_value;
+ } else {
+ lost_fraction = trailingHexadecimalFraction(p, end, hex_value);
+ while(p != end && hexDigitValue(*p) != -1U)
+ p++;
+ break;
+ }
}
}
/* Hex floats require an exponent but not a hexadecimal point. */
- assert(*p == 'p' || *p == 'P');
+ assert(p != end && "Hex strings require an exponent");
+ assert((*p == 'p' || *p == 'P') && "Invalid character in significand");
+ assert(p != begin && "Significand has no digits");
+ assert((dot == end || p - begin != 1) && "Significand has no digits");
/* Ignore the exponent if we are zero. */
if(p != firstSignificantDigit) {
int expAdjustment;
/* Implicit hexadecimal point? */
- if(!dot)
+ if (dot == end)
dot = p;
/* Calculate the exponent adjustment implicit in the number of
expAdjustment -= partsCount * integerPartWidth;
/* Adjust for the given exponent. */
- exponent = totalExponent(p, expAdjustment);
+ exponent = totalExponent(p + 1, end, expAdjustment);
}
return normalize(rounding_mode, lost_fraction);
/* Both multiplySignificand and divideSignificand return the
result with the integer bit set. */
- assert (APInt::tcExtractBit
- (decSig.significandParts(), calcSemantics.precision - 1) == 1);
+ assert(APInt::tcExtractBit
+ (decSig.significandParts(), calcSemantics.precision - 1) == 1);
HUerr = HUerrBound(calcLostFraction != lfExactlyZero, sigStatus != opOK,
powHUerr);
}
APFloat::opStatus
-APFloat::convertFromDecimalString(const char *p, roundingMode rounding_mode)
+APFloat::convertFromDecimalString(const StringRef &str, roundingMode rounding_mode)
{
decimalInfo D;
opStatus fs;
/* Scan the text. */
- interpretDecimal(p, &D);
+ StringRef::iterator p = str.begin();
+ interpretDecimal(p, str.end(), &D);
/* Handle the quick cases. First the case of no significant digits,
i.e. zero, and then exponents that are obviously too large or too
multiplier = 1;
do {
- if (*p == '.')
+ if (*p == '.') {
p++;
-
+ if (p == str.end()) {
+ break;
+ }
+ }
decValue = decDigitValue(*p++);
+ assert(decValue < 10U && "Invalid character in significand");
multiplier *= 10;
val = val * 10 + decValue;
/* The maximum number that can be multiplied by ten with any
}
APFloat::opStatus
-APFloat::convertFromString(const char *p, roundingMode rounding_mode)
+APFloat::convertFromString(const StringRef &str, roundingMode rounding_mode)
{
assertArithmeticOK(*semantics);
+ assert(!str.empty() && "Invalid string length");
/* Handle a leading minus sign. */
- if(*p == '-')
- sign = 1, p++;
- else
- sign = 0;
+ StringRef::iterator p = str.begin();
+ size_t slen = str.size();
+ sign = *p == '-' ? 1 : 0;
+ if(*p == '-' || *p == '+') {
+ p++;
+ slen--;
+ assert(slen && "String has no digits");
+ }
- if(p[0] == '0' && (p[1] == 'x' || p[1] == 'X'))
- return convertFromHexadecimalString(p + 2, rounding_mode);
+ if(slen >= 2 && p[0] == '0' && (p[1] == 'x' || p[1] == 'X')) {
+ assert(slen - 2 && "Invalid string");
+ return convertFromHexadecimalString(StringRef(p + 2, slen - 2),
+ rounding_mode);
+ }
- return convertFromDecimalString(p, rounding_mode);
+ return convertFromDecimalString(StringRef(p, slen), rounding_mode);
}
/* Write out a hexadecimal representation of the floating point value
q--;
*q = hexDigitChars[hexDigitValue (*q) + 1];
} while (*q == '0');
- assert (q >= p);
+ assert(q >= p);
} else {
/* Add trailing zeroes. */
memset (dst, '0', outputDigits);
APFloat::convertF80LongDoubleAPFloatToAPInt() const
{
assert(semantics == (const llvm::fltSemantics*)&x87DoubleExtended);
- assert (partCount()==2);
+ assert(partCount()==2);
uint64_t myexponent, mysignificand;
}
uint64_t words[2];
- words[0] = ((uint64_t)(sign & 1) << 63) |
- ((myexponent & 0x7fffLL) << 48) |
- ((mysignificand >>16) & 0xffffffffffffLL);
- words[1] = mysignificand & 0xffff;
+ words[0] = mysignificand;
+ words[1] = ((uint64_t)(sign & 1) << 15) |
+ (myexponent & 0x7fffLL);
return APInt(80, 2, words);
}
APFloat::convertPPCDoubleDoubleAPFloatToAPInt() const
{
assert(semantics == (const llvm::fltSemantics*)&PPCDoubleDouble);
- assert (partCount()==2);
+ assert(partCount()==2);
uint64_t myexponent, mysignificand, myexponent2, mysignificand2;
return APInt(128, 2, words);
}
+APInt
+APFloat::convertQuadrupleAPFloatToAPInt() const
+{
+ assert(semantics == (const llvm::fltSemantics*)&IEEEquad);
+ assert(partCount()==2);
+
+ uint64_t myexponent, mysignificand, mysignificand2;
+
+ if (category==fcNormal) {
+ myexponent = exponent+16383; //bias
+ mysignificand = significandParts()[0];
+ mysignificand2 = significandParts()[1];
+ if (myexponent==1 && !(mysignificand2 & 0x1000000000000LL))
+ myexponent = 0; // denormal
+ } else if (category==fcZero) {
+ myexponent = 0;
+ mysignificand = mysignificand2 = 0;
+ } else if (category==fcInfinity) {
+ myexponent = 0x7fff;
+ mysignificand = mysignificand2 = 0;
+ } else {
+ assert(category == fcNaN && "Unknown category!");
+ myexponent = 0x7fff;
+ mysignificand = significandParts()[0];
+ mysignificand2 = significandParts()[1];
+ }
+
+ uint64_t words[2];
+ words[0] = mysignificand;
+ words[1] = ((uint64_t)(sign & 1) << 63) |
+ ((myexponent & 0x7fff) << 48) |
+ (mysignificand2 & 0xffffffffffffLL);
+
+ return APInt(128, 2, words);
+}
+
APInt
APFloat::convertDoubleAPFloatToAPInt() const
{
assert(semantics == (const llvm::fltSemantics*)&IEEEdouble);
- assert (partCount()==1);
+ assert(partCount()==1);
uint64_t myexponent, mysignificand;
APFloat::convertFloatAPFloatToAPInt() const
{
assert(semantics == (const llvm::fltSemantics*)&IEEEsingle);
- assert (partCount()==1);
+ assert(partCount()==1);
uint32_t myexponent, mysignificand;
(mysignificand & 0x7fffff)));
}
+APInt
+APFloat::convertHalfAPFloatToAPInt() const
+{
+ assert(semantics == (const llvm::fltSemantics*)&IEEEhalf);
+ assert(partCount()==1);
+
+ uint32_t myexponent, mysignificand;
+
+ if (category==fcNormal) {
+ myexponent = exponent+15; //bias
+ mysignificand = (uint32_t)*significandParts();
+ if (myexponent == 1 && !(mysignificand & 0x400))
+ myexponent = 0; // denormal
+ } else if (category==fcZero) {
+ myexponent = 0;
+ mysignificand = 0;
+ } else if (category==fcInfinity) {
+ myexponent = 0x1f;
+ mysignificand = 0;
+ } else {
+ assert(category == fcNaN && "Unknown category!");
+ myexponent = 0x1f;
+ mysignificand = (uint32_t)*significandParts();
+ }
+
+ return APInt(16, (((sign&1) << 15) | ((myexponent&0x1f) << 10) |
+ (mysignificand & 0x3ff)));
+}
+
// This function creates an APInt that is just a bit map of the floating
// point constant as it would appear in memory. It is not a conversion,
// and treating the result as a normal integer is unlikely to be useful.
APInt
APFloat::bitcastToAPInt() const
{
+ if (semantics == (const llvm::fltSemantics*)&IEEEhalf)
+ return convertHalfAPFloatToAPInt();
+
if (semantics == (const llvm::fltSemantics*)&IEEEsingle)
return convertFloatAPFloatToAPInt();
-
+
if (semantics == (const llvm::fltSemantics*)&IEEEdouble)
return convertDoubleAPFloatToAPInt();
+ if (semantics == (const llvm::fltSemantics*)&IEEEquad)
+ return convertQuadrupleAPFloatToAPInt();
+
if (semantics == (const llvm::fltSemantics*)&PPCDoubleDouble)
return convertPPCDoubleDoubleAPFloatToAPInt();
float
APFloat::convertToFloat() const
{
- assert(semantics == (const llvm::fltSemantics*)&IEEEsingle);
+ assert(semantics == (const llvm::fltSemantics*)&IEEEsingle &&
+ "Float semantics are not IEEEsingle");
APInt api = bitcastToAPInt();
return api.bitsToFloat();
}
double
APFloat::convertToDouble() const
{
- assert(semantics == (const llvm::fltSemantics*)&IEEEdouble);
+ assert(semantics == (const llvm::fltSemantics*)&IEEEdouble &&
+ "Float semantics are not IEEEdouble");
APInt api = bitcastToAPInt();
return api.bitsToDouble();
}
assert(api.getBitWidth()==80);
uint64_t i1 = api.getRawData()[0];
uint64_t i2 = api.getRawData()[1];
- uint64_t myexponent = (i1 >> 48) & 0x7fff;
- uint64_t mysignificand = ((i1 << 16) & 0xffffffffffff0000ULL) |
- (i2 & 0xffff);
+ uint64_t myexponent = (i2 & 0x7fff);
+ uint64_t mysignificand = i1;
initialize(&APFloat::x87DoubleExtended);
assert(partCount()==2);
- sign = static_cast<unsigned int>(i1>>63);
+ sign = static_cast<unsigned int>(i2>>15);
if (myexponent==0 && mysignificand==0) {
// exponent, significand meaningless
category = fcZero;
}
}
+void
+APFloat::initFromQuadrupleAPInt(const APInt &api)
+{
+ assert(api.getBitWidth()==128);
+ uint64_t i1 = api.getRawData()[0];
+ uint64_t i2 = api.getRawData()[1];
+ uint64_t myexponent = (i2 >> 48) & 0x7fff;
+ uint64_t mysignificand = i1;
+ uint64_t mysignificand2 = i2 & 0xffffffffffffLL;
+
+ initialize(&APFloat::IEEEquad);
+ assert(partCount()==2);
+
+ sign = static_cast<unsigned int>(i2>>63);
+ if (myexponent==0 &&
+ (mysignificand==0 && mysignificand2==0)) {
+ // exponent, significand meaningless
+ category = fcZero;
+ } else if (myexponent==0x7fff &&
+ (mysignificand==0 && mysignificand2==0)) {
+ // exponent, significand meaningless
+ category = fcInfinity;
+ } else if (myexponent==0x7fff &&
+ (mysignificand!=0 || mysignificand2 !=0)) {
+ // exponent meaningless
+ category = fcNaN;
+ significandParts()[0] = mysignificand;
+ significandParts()[1] = mysignificand2;
+ } else {
+ category = fcNormal;
+ exponent = myexponent - 16383;
+ significandParts()[0] = mysignificand;
+ significandParts()[1] = mysignificand2;
+ if (myexponent==0) // denormal
+ exponent = -16382;
+ else
+ significandParts()[1] |= 0x1000000000000LL; // integer bit
+ }
+}
+
void
APFloat::initFromDoubleAPInt(const APInt &api)
{
}
}
+void
+APFloat::initFromHalfAPInt(const APInt & api)
+{
+ assert(api.getBitWidth()==16);
+ uint32_t i = (uint32_t)*api.getRawData();
+ uint32_t myexponent = (i >> 10) & 0x1f;
+ uint32_t mysignificand = i & 0x3ff;
+
+ initialize(&APFloat::IEEEhalf);
+ assert(partCount()==1);
+
+ sign = i >> 15;
+ if (myexponent==0 && mysignificand==0) {
+ // exponent, significand meaningless
+ category = fcZero;
+ } else if (myexponent==0x1f && mysignificand==0) {
+ // exponent, significand meaningless
+ category = fcInfinity;
+ } else if (myexponent==0x1f && mysignificand!=0) {
+ // sign, exponent, significand meaningless
+ category = fcNaN;
+ *significandParts() = mysignificand;
+ } else {
+ category = fcNormal;
+ exponent = myexponent - 15; //bias
+ *significandParts() = mysignificand;
+ if (myexponent==0) // denormal
+ exponent = -14;
+ else
+ *significandParts() |= 0x400; // integer bit
+ }
+}
+
/// Treat api as containing the bits of a floating point number. Currently
/// we infer the floating point type from the size of the APInt. The
/// isIEEE argument distinguishes between PPC128 and IEEE128 (not meaningful
void
APFloat::initFromAPInt(const APInt& api, bool isIEEE)
{
- if (api.getBitWidth() == 32)
+ if (api.getBitWidth() == 16)
+ return initFromHalfAPInt(api);
+ else if (api.getBitWidth() == 32)
return initFromFloatAPInt(api);
else if (api.getBitWidth()==64)
return initFromDoubleAPInt(api);
else if (api.getBitWidth()==80)
return initFromF80LongDoubleAPInt(api);
- else if (api.getBitWidth()==128 && !isIEEE)
- return initFromPPCDoubleDoubleAPInt(api);
+ else if (api.getBitWidth()==128)
+ return (isIEEE ?
+ initFromQuadrupleAPInt(api) : initFromPPCDoubleDoubleAPInt(api));
else
- assert(0);
+ llvm_unreachable(0);
}
APFloat::APFloat(const APInt& api, bool isIEEE)
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