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-rw-r--r--lib/Support/APFloat.cpp219
-rw-r--r--lib/Support/Atomic.cpp14
-rw-r--r--lib/Support/CMakeLists.txt6
-rw-r--r--lib/Support/Errno.cpp4
-rw-r--r--lib/Support/Host.cpp1
-rw-r--r--lib/Support/Makefile3
-rw-r--r--lib/Support/Triple.cpp32
7 files changed, 94 insertions, 185 deletions
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp
index d07a3c9e7f..43c68f4d1d 100644
--- a/lib/Support/APFloat.cpp
+++ b/lib/Support/APFloat.cpp
@@ -46,22 +46,27 @@ namespace llvm {
/* Number of bits in the significand. This includes the integer
bit. */
unsigned int precision;
-
- /* True if arithmetic is supported. */
- 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 };
- const fltSemantics APFloat::x87DoubleExtended = { 16383, -16382, 64, true };
- const fltSemantics APFloat::Bogus = { 0, 0, 0, true };
-
- // The PowerPC format consists of two doubles. It does not map cleanly
- // onto the usual format above. For now only storage of constants of
- // this type is supported, no arithmetic.
- const fltSemantics APFloat::PPCDoubleDouble = { 1023, -1022, 106, false };
+ const fltSemantics APFloat::IEEEhalf = { 15, -14, 11 };
+ const fltSemantics APFloat::IEEEsingle = { 127, -126, 24 };
+ const fltSemantics APFloat::IEEEdouble = { 1023, -1022, 53 };
+ const fltSemantics APFloat::IEEEquad = { 16383, -16382, 113 };
+ const fltSemantics APFloat::x87DoubleExtended = { 16383, -16382, 64 };
+ const fltSemantics APFloat::Bogus = { 0, 0, 0 };
+
+ /* The PowerPC format consists of two doubles. It does not map cleanly
+ onto the usual format above. It is approximated using twice the
+ mantissa bits. Note that for exponents near the double minimum,
+ we no longer can represent the full 106 mantissa bits, so those
+ will be treated as denormal numbers.
+
+ FIXME: While this approximation is equivalent to what GCC uses for
+ compile-time arithmetic on PPC double-double numbers, it is not able
+ to represent all possible values held by a PPC double-double number,
+ for example: (long double) 1.0 + (long double) 0x1p-106
+ Should this be replaced by a full emulation of PPC double-double? */
+ const fltSemantics APFloat::PPCDoubleDouble = { 1023, -1022 + 53, 53 + 53 };
/* A tight upper bound on number of parts required to hold the value
pow(5, power) is
@@ -116,12 +121,6 @@ hexDigitValue(unsigned int c)
return -1U;
}
-static inline void
-assertArithmeticOK(const llvm::fltSemantics &semantics) {
- assert(semantics.arithmeticOK &&
- "Compile-time arithmetic does not support these semantics");
-}
-
/* Return the value of a decimal exponent of the form
[+-]ddddddd.
@@ -612,8 +611,6 @@ APFloat::assign(const APFloat &rhs)
sign = rhs.sign;
category = rhs.category;
exponent = rhs.exponent;
- sign2 = rhs.sign2;
- exponent2 = rhs.exponent2;
if (category == fcNormal || category == fcNaN)
copySignificand(rhs);
}
@@ -707,16 +704,10 @@ APFloat::bitwiseIsEqual(const APFloat &rhs) const {
category != rhs.category ||
sign != rhs.sign)
return false;
- if (semantics==(const llvm::fltSemantics*)&PPCDoubleDouble &&
- sign2 != rhs.sign2)
- return false;
if (category==fcZero || category==fcInfinity)
return true;
else if (category==fcNormal && exponent!=rhs.exponent)
return false;
- else if (semantics==(const llvm::fltSemantics*)&PPCDoubleDouble &&
- exponent2!=rhs.exponent2)
- return false;
else {
int i= partCount();
const integerPart* p=significandParts();
@@ -729,9 +720,7 @@ APFloat::bitwiseIsEqual(const APFloat &rhs) const {
}
}
-APFloat::APFloat(const fltSemantics &ourSemantics, integerPart value)
- : exponent2(0), sign2(0) {
- assertArithmeticOK(ourSemantics);
+APFloat::APFloat(const fltSemantics &ourSemantics, integerPart value) {
initialize(&ourSemantics);
sign = 0;
zeroSignificand();
@@ -740,24 +729,19 @@ APFloat::APFloat(const fltSemantics &ourSemantics, integerPart value)
normalize(rmNearestTiesToEven, lfExactlyZero);
}
-APFloat::APFloat(const fltSemantics &ourSemantics) : exponent2(0), sign2(0) {
- assertArithmeticOK(ourSemantics);
+APFloat::APFloat(const fltSemantics &ourSemantics) {
initialize(&ourSemantics);
category = fcZero;
sign = false;
}
-APFloat::APFloat(const fltSemantics &ourSemantics, uninitializedTag tag)
- : exponent2(0), sign2(0) {
- assertArithmeticOK(ourSemantics);
+APFloat::APFloat(const fltSemantics &ourSemantics, uninitializedTag tag) {
// Allocates storage if necessary but does not initialize it.
initialize(&ourSemantics);
}
APFloat::APFloat(const fltSemantics &ourSemantics,
- fltCategory ourCategory, bool negative)
- : exponent2(0), sign2(0) {
- assertArithmeticOK(ourSemantics);
+ fltCategory ourCategory, bool negative) {
initialize(&ourSemantics);
category = ourCategory;
sign = negative;
@@ -767,14 +751,12 @@ APFloat::APFloat(const fltSemantics &ourSemantics,
makeNaN();
}
-APFloat::APFloat(const fltSemantics &ourSemantics, StringRef text)
- : exponent2(0), sign2(0) {
- assertArithmeticOK(ourSemantics);
+APFloat::APFloat(const fltSemantics &ourSemantics, StringRef text) {
initialize(&ourSemantics);
convertFromString(text, rmNearestTiesToEven);
}
-APFloat::APFloat(const APFloat &rhs) : exponent2(0), sign2(0) {
+APFloat::APFloat(const APFloat &rhs) {
initialize(rhs.semantics);
assign(rhs);
}
@@ -1561,8 +1543,6 @@ APFloat::addOrSubtract(const APFloat &rhs, roundingMode rounding_mode,
{
opStatus fs;
- assertArithmeticOK(*semantics);
-
fs = addOrSubtractSpecials(rhs, subtract);
/* This return code means it was not a simple case. */
@@ -1607,7 +1587,6 @@ APFloat::multiply(const APFloat &rhs, roundingMode rounding_mode)
{
opStatus fs;
- assertArithmeticOK(*semantics);
sign ^= rhs.sign;
fs = multiplySpecials(rhs);
@@ -1627,7 +1606,6 @@ APFloat::divide(const APFloat &rhs, roundingMode rounding_mode)
{
opStatus fs;
- assertArithmeticOK(*semantics);
sign ^= rhs.sign;
fs = divideSpecials(rhs);
@@ -1649,7 +1627,6 @@ APFloat::remainder(const APFloat &rhs)
APFloat V = *this;
unsigned int origSign = sign;
- assertArithmeticOK(*semantics);
fs = V.divide(rhs, rmNearestTiesToEven);
if (fs == opDivByZero)
return fs;
@@ -1684,7 +1661,6 @@ APFloat::opStatus
APFloat::mod(const APFloat &rhs, roundingMode rounding_mode)
{
opStatus fs;
- assertArithmeticOK(*semantics);
fs = modSpecials(rhs);
if (category == fcNormal && rhs.category == fcNormal) {
@@ -1728,8 +1704,6 @@ APFloat::fusedMultiplyAdd(const APFloat &multiplicand,
{
opStatus fs;
- assertArithmeticOK(*semantics);
-
/* Post-multiplication sign, before addition. */
sign ^= multiplicand.sign;
@@ -1770,7 +1744,6 @@ APFloat::fusedMultiplyAdd(const APFloat &multiplicand,
/* Rounding-mode corrrect round to integral value. */
APFloat::opStatus APFloat::roundToIntegral(roundingMode rounding_mode) {
opStatus fs;
- assertArithmeticOK(*semantics);
// If the exponent is large enough, we know that this value is already
// integral, and the arithmetic below would potentially cause it to saturate
@@ -1817,7 +1790,6 @@ APFloat::compare(const APFloat &rhs) const
{
cmpResult result;
- assertArithmeticOK(*semantics);
assert(semantics == rhs.semantics);
switch (convolve(category, rhs.category)) {
@@ -1902,8 +1874,6 @@ APFloat::convert(const fltSemantics &toSemantics,
int shift;
const fltSemantics &fromSemantics = *semantics;
- assertArithmeticOK(fromSemantics);
- assertArithmeticOK(toSemantics);
lostFraction = lfExactlyZero;
newPartCount = partCountForBits(toSemantics.precision + 1);
oldPartCount = partCount();
@@ -1988,8 +1958,6 @@ APFloat::convertToSignExtendedInteger(integerPart *parts, unsigned int width,
const integerPart *src;
unsigned int dstPartsCount, truncatedBits;
- assertArithmeticOK(*semantics);
-
*isExact = false;
/* Handle the three special cases first. */
@@ -2151,7 +2119,6 @@ APFloat::convertFromUnsignedParts(const integerPart *src,
integerPart *dst;
lostFraction lost_fraction;
- assertArithmeticOK(*semantics);
category = fcNormal;
omsb = APInt::tcMSB(src, srcCount) + 1;
dst = significandParts();
@@ -2202,7 +2169,6 @@ APFloat::convertFromSignExtendedInteger(const integerPart *src,
{
opStatus status;
- assertArithmeticOK(*semantics);
if (isSigned &&
APInt::tcExtractBit(src, srcCount * integerPartWidth - 1)) {
integerPart *copy;
@@ -2336,7 +2302,7 @@ APFloat::roundSignificandWithExponent(const integerPart *decSigParts,
roundingMode rounding_mode)
{
unsigned int parts, pow5PartCount;
- fltSemantics calcSemantics = { 32767, -32767, 0, true };
+ fltSemantics calcSemantics = { 32767, -32767, 0 };
integerPart pow5Parts[maxPowerOfFiveParts];
bool isNearest;
@@ -2528,7 +2494,6 @@ APFloat::convertFromDecimalString(StringRef str, roundingMode rounding_mode)
APFloat::opStatus
APFloat::convertFromString(StringRef str, roundingMode rounding_mode)
{
- assertArithmeticOK(*semantics);
assert(!str.empty() && "Invalid string length");
/* Handle a leading minus sign. */
@@ -2580,8 +2545,6 @@ APFloat::convertToHexString(char *dst, unsigned int hexDigits,
{
char *p;
- assertArithmeticOK(*semantics);
-
p = dst;
if (sign)
*dst++ = '-';
@@ -2790,42 +2753,46 @@ APFloat::convertPPCDoubleDoubleAPFloatToAPInt() const
assert(semantics == (const llvm::fltSemantics*)&PPCDoubleDouble);
assert(partCount()==2);
- uint64_t myexponent, mysignificand, myexponent2, mysignificand2;
-
- if (category==fcNormal) {
- myexponent = exponent + 1023; //bias
- myexponent2 = exponent2 + 1023;
- mysignificand = significandParts()[0];
- mysignificand2 = significandParts()[1];
- if (myexponent==1 && !(mysignificand & 0x10000000000000LL))
- myexponent = 0; // denormal
- if (myexponent2==1 && !(mysignificand2 & 0x10000000000000LL))
- myexponent2 = 0; // denormal
- } else if (category==fcZero) {
- myexponent = 0;
- mysignificand = 0;
- myexponent2 = 0;
- mysignificand2 = 0;
- } else if (category==fcInfinity) {
- myexponent = 0x7ff;
- myexponent2 = 0;
- mysignificand = 0;
- mysignificand2 = 0;
+ uint64_t words[2];
+ opStatus fs;
+ bool losesInfo;
+
+ // Convert number to double. To avoid spurious underflows, we re-
+ // normalize against the "double" minExponent first, and only *then*
+ // truncate the mantissa. The result of that second conversion
+ // may be inexact, but should never underflow.
+ APFloat extended(*this);
+ fltSemantics extendedSemantics = *semantics;
+ extendedSemantics.minExponent = IEEEdouble.minExponent;
+ fs = extended.convert(extendedSemantics, rmNearestTiesToEven, &losesInfo);
+ assert(fs == opOK && !losesInfo);
+ (void)fs;
+
+ APFloat u(extended);
+ fs = u.convert(IEEEdouble, rmNearestTiesToEven, &losesInfo);
+ assert(fs == opOK || fs == opInexact);
+ (void)fs;
+ words[0] = *u.convertDoubleAPFloatToAPInt().getRawData();
+
+ // If conversion was exact or resulted in a special case, we're done;
+ // just set the second double to zero. Otherwise, re-convert back to
+ // the extended format and compute the difference. This now should
+ // convert exactly to double.
+ if (u.category == fcNormal && losesInfo) {
+ fs = u.convert(extendedSemantics, rmNearestTiesToEven, &losesInfo);
+ assert(fs == opOK && !losesInfo);
+ (void)fs;
+
+ APFloat v(extended);
+ v.subtract(u, rmNearestTiesToEven);
+ fs = v.convert(IEEEdouble, rmNearestTiesToEven, &losesInfo);
+ assert(fs == opOK && !losesInfo);
+ (void)fs;
+ words[1] = *v.convertDoubleAPFloatToAPInt().getRawData();
} else {
- assert(category == fcNaN && "Unknown category");
- myexponent = 0x7ff;
- mysignificand = significandParts()[0];
- myexponent2 = exponent2;
- mysignificand2 = significandParts()[1];
+ words[1] = 0;
}
- uint64_t words[2];
- words[0] = ((uint64_t)(sign & 1) << 63) |
- ((myexponent & 0x7ff) << 52) |
- (mysignificand & 0xfffffffffffffLL);
- words[1] = ((uint64_t)(sign2 & 1) << 63) |
- ((myexponent2 & 0x7ff) << 52) |
- (mysignificand2 & 0xfffffffffffffLL);
return APInt(128, words);
}
@@ -3045,47 +3012,23 @@ APFloat::initFromPPCDoubleDoubleAPInt(const APInt &api)
assert(api.getBitWidth()==128);
uint64_t i1 = api.getRawData()[0];
uint64_t i2 = api.getRawData()[1];
- uint64_t myexponent = (i1 >> 52) & 0x7ff;
- uint64_t mysignificand = i1 & 0xfffffffffffffLL;
- uint64_t myexponent2 = (i2 >> 52) & 0x7ff;
- uint64_t mysignificand2 = i2 & 0xfffffffffffffLL;
+ opStatus fs;
+ bool losesInfo;
- initialize(&APFloat::PPCDoubleDouble);
- assert(partCount()==2);
+ // Get the first double and convert to our format.
+ initFromDoubleAPInt(APInt(64, i1));
+ fs = convert(PPCDoubleDouble, rmNearestTiesToEven, &losesInfo);
+ assert(fs == opOK && !losesInfo);
+ (void)fs;
- sign = static_cast<unsigned int>(i1>>63);
- sign2 = static_cast<unsigned int>(i2>>63);
- if (myexponent==0 && mysignificand==0) {
- // exponent, significand meaningless
- // exponent2 and significand2 are required to be 0; we don't check
- category = fcZero;
- } else if (myexponent==0x7ff && mysignificand==0) {
- // exponent, significand meaningless
- // exponent2 and significand2 are required to be 0; we don't check
- category = fcInfinity;
- } else if (myexponent==0x7ff && mysignificand!=0) {
- // exponent meaningless. So is the whole second word, but keep it
- // for determinism.
- category = fcNaN;
- exponent2 = myexponent2;
- significandParts()[0] = mysignificand;
- significandParts()[1] = mysignificand2;
- } else {
- category = fcNormal;
- // Note there is no category2; the second word is treated as if it is
- // fcNormal, although it might be something else considered by itself.
- exponent = myexponent - 1023;
- exponent2 = myexponent2 - 1023;
- significandParts()[0] = mysignificand;
- significandParts()[1] = mysignificand2;
- if (myexponent==0) // denormal
- exponent = -1022;
- else
- significandParts()[0] |= 0x10000000000000LL; // integer bit
- if (myexponent2==0)
- exponent2 = -1022;
- else
- significandParts()[1] |= 0x10000000000000LL; // integer bit
+ // Unless we have a special case, add in second double.
+ if (category == fcNormal) {
+ APFloat v(APInt(64, i2));
+ fs = v.convert(PPCDoubleDouble, rmNearestTiesToEven, &losesInfo);
+ assert(fs == opOK && !losesInfo);
+ (void)fs;
+
+ add(v, rmNearestTiesToEven);
}
}
@@ -3311,15 +3254,15 @@ APFloat APFloat::getSmallestNormalized(const fltSemantics &Sem, bool Negative) {
return Val;
}
-APFloat::APFloat(const APInt& api, bool isIEEE) : exponent2(0), sign2(0) {
+APFloat::APFloat(const APInt& api, bool isIEEE) {
initFromAPInt(api, isIEEE);
}
-APFloat::APFloat(float f) : exponent2(0), sign2(0) {
+APFloat::APFloat(float f) {
initFromAPInt(APInt::floatToBits(f));
}
-APFloat::APFloat(double d) : exponent2(0), sign2(0) {
+APFloat::APFloat(double d) {
initFromAPInt(APInt::doubleToBits(d));
}
diff --git a/lib/Support/Atomic.cpp b/lib/Support/Atomic.cpp
index 3001f6c468..9559ad7295 100644
--- a/lib/Support/Atomic.cpp
+++ b/lib/Support/Atomic.cpp
@@ -21,11 +21,15 @@ using namespace llvm;
#undef MemoryFence
#endif
+#if defined(__GNUC__) || (defined(__IBMCPP__) && __IBMCPP__ >= 1210)
+#define GNU_ATOMICS
+#endif
+
void sys::MemoryFence() {
#if LLVM_HAS_ATOMICS == 0
return;
#else
-# if defined(__GNUC__)
+# if defined(GNU_ATOMICS)
__sync_synchronize();
# elif defined(_MSC_VER)
MemoryBarrier();
@@ -43,7 +47,7 @@ sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
if (result == old_value)
*ptr = new_value;
return result;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_val_compare_and_swap(ptr, old_value, new_value);
#elif defined(_MSC_VER)
return InterlockedCompareExchange(ptr, new_value, old_value);
@@ -56,7 +60,7 @@ sys::cas_flag sys::AtomicIncrement(volatile sys::cas_flag* ptr) {
#if LLVM_HAS_ATOMICS == 0
++(*ptr);
return *ptr;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_add_and_fetch(ptr, 1);
#elif defined(_MSC_VER)
return InterlockedIncrement(ptr);
@@ -69,7 +73,7 @@ sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) {
#if LLVM_HAS_ATOMICS == 0
--(*ptr);
return *ptr;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_sub_and_fetch(ptr, 1);
#elif defined(_MSC_VER)
return InterlockedDecrement(ptr);
@@ -82,7 +86,7 @@ sys::cas_flag sys::AtomicAdd(volatile sys::cas_flag* ptr, sys::cas_flag val) {
#if LLVM_HAS_ATOMICS == 0
*ptr += val;
return *ptr;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_add_and_fetch(ptr, val);
#elif defined(_MSC_VER)
return InterlockedExchangeAdd(ptr, val) + val;
diff --git a/lib/Support/CMakeLists.txt b/lib/Support/CMakeLists.txt
index 83baf60d04..6af0f4a6c9 100644
--- a/lib/Support/CMakeLists.txt
+++ b/lib/Support/CMakeLists.txt
@@ -1,9 +1,3 @@
-## FIXME: This only requires RTTI because tblgen uses it. Fix that.
-set(LLVM_REQUIRES_RTTI 1)
-if( MINGW )
- set(LLVM_REQUIRES_EH 1)
-endif()
-
add_llvm_library(LLVMSupport
APFloat.cpp
APInt.cpp
diff --git a/lib/Support/Errno.cpp b/lib/Support/Errno.cpp
index 00be43b750..730220f47d 100644
--- a/lib/Support/Errno.cpp
+++ b/lib/Support/Errno.cpp
@@ -53,8 +53,10 @@ std::string StrError(int errnum) {
str = buffer;
# endif
#elif HAVE_DECL_STRERROR_S // "Windows Secure API"
- if (errnum)
+ if (errnum) {
strerror_s(buffer, MaxErrStrLen - 1, errnum);
+ str = buffer;
+ }
#elif defined(HAVE_STRERROR)
// Copy the thread un-safe result of strerror into
// the buffer as fast as possible to minimize impact
diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp
index 9ee3f2db92..34e32b817b 100644
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -503,6 +503,7 @@ std::string sys::getHostCPUName() {
.Case("0xb76", "arm1176jz-s")
.Case("0xc08", "cortex-a8")
.Case("0xc09", "cortex-a9")
+ .Case("0xc0f", "cortex-a15")
.Case("0xc20", "cortex-m0")
.Case("0xc23", "cortex-m3")
.Case("0xc24", "cortex-m4")
diff --git a/lib/Support/Makefile b/lib/Support/Makefile
index d68e500ca5..4a2185d589 100644
--- a/lib/Support/Makefile
+++ b/lib/Support/Makefile
@@ -11,9 +11,6 @@ LEVEL = ../..
LIBRARYNAME = LLVMSupport
BUILD_ARCHIVE = 1
-## FIXME: This only requires RTTI because tblgen uses it. Fix that.
-REQUIRES_RTTI = 1
-
EXTRA_DIST = Unix Win32 README.txt
include $(LEVEL)/Makefile.common
diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index 2cc7a58462..c59ec19ecb 100644
--- a/lib/Support/Triple.cpp
+++ b/lib/Support/Triple.cpp
@@ -180,38 +180,6 @@ Triple::ArchType Triple::getArchTypeForLLVMName(StringRef Name) {
.Default(UnknownArch);
}
-Triple::ArchType Triple::getArchTypeForDarwinArchName(StringRef Str) {
- // See arch(3) and llvm-gcc's driver-driver.c. We don't implement support for
- // archs which Darwin doesn't use.
-
- // The matching this routine does is fairly pointless, since it is neither the
- // complete architecture list, nor a reasonable subset. The problem is that
- // historically the driver driver accepts this and also ties its -march=
- // handling to the architecture name, so we need to be careful before removing
- // support for it.
-
- // This code must be kept in sync with Clang's Darwin specific argument
- // translation.
-
- return StringSwitch<ArchType>(Str)
- .Cases("ppc", "ppc601", "ppc603", "ppc604", "ppc604e", Triple::ppc)
- .Cases("ppc750", "ppc7400", "ppc7450", "ppc970", Triple::ppc)
- .Case("ppc64", Triple::ppc64)
- .Cases("i386", "i486", "i486SX", "i586", "i686", Triple::x86)
- .Cases("pentium", "pentpro", "pentIIm3", "pentIIm5", "pentium4",
- Triple::x86)
- .Case("x86_64", Triple::x86_64)
- // This is derived from the driver driver.
- .Cases("arm", "armv4t", "armv5", "armv6", Triple::arm)
- .Cases("armv7", "armv7f", "armv7k", "armv7s", "xscale", Triple::arm)
- .Case("r600", Triple::r600)
- .Case("nvptx", Triple::nvptx)
- .Case("nvptx64", Triple::nvptx64)
- .Case("amdil", Triple::amdil)
- .Case("spir", Triple::spir)
- .Default(Triple::UnknownArch);
-}
-
// Returns architecture name that is understood by the target assembler.
const char *Triple::getArchNameForAssembler() {
if (!isOSDarwin() && getVendor() != Triple::Apple)