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jeremybenn |
/* HOST_WIDE_INT definitions for the GNU compiler.
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Copyright (C) 1998, 2002, 2004, 2008, 2009, 2010
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Free Software Foundation, Inc.
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This file is part of GCC.
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Provide definitions for macros which depend on HOST_BITS_PER_INT
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and HOST_BITS_PER_LONG. */
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#ifndef GCC_HWINT_H
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#define GCC_HWINT_H
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/* This describes the machine the compiler is hosted on. */
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#define HOST_BITS_PER_CHAR CHAR_BIT
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#define HOST_BITS_PER_SHORT (CHAR_BIT * SIZEOF_SHORT)
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#define HOST_BITS_PER_INT (CHAR_BIT * SIZEOF_INT)
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#define HOST_BITS_PER_LONG (CHAR_BIT * SIZEOF_LONG)
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/* The string that should be inserted into a printf style format to
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indicate a "long" operand. */
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#ifndef HOST_LONG_FORMAT
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#define HOST_LONG_FORMAT "l"
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#endif
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/* The string that should be inserted into a printf style format to
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indicate a "long long" operand. */
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#ifndef HOST_LONG_LONG_FORMAT
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#define HOST_LONG_LONG_FORMAT "ll"
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#endif
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/* If HAVE_LONG_LONG and SIZEOF_LONG_LONG aren't defined, but
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GCC_VERSION >= 3000, assume this is the second or later stage of a
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bootstrap, we do have long long, and it's 64 bits. (This is
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required by C99; we do have some ports that violate that assumption
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but they're all cross-compile-only.) Just in case, force a
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constraint violation if that assumption is incorrect. */
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#if !defined HAVE_LONG_LONG
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# if GCC_VERSION >= 3000
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# define HAVE_LONG_LONG 1
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# define SIZEOF_LONG_LONG 8
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extern char sizeof_long_long_must_be_8[sizeof(long long) == 8 ? 1 : -1];
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# endif
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#endif
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#ifdef HAVE_LONG_LONG
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# define HOST_BITS_PER_LONGLONG (CHAR_BIT * SIZEOF_LONG_LONG)
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#endif
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#ifdef HAVE___INT64
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# define HOST_BITS_PER___INT64 (CHAR_BIT * SIZEOF___INT64)
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#endif
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/* Set HOST_WIDE_INT. This should be the widest efficient host
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integer type. It can be 32 or 64 bits, except that if we are
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targeting a machine with 64-bit size_t then it has to be 64 bits.
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With a sane ABI, 'long' is the largest efficient host integer type.
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Thus, we use that unless we have to use 'long long' or '__int64'
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because we're targeting a 64-bit machine from a 32-bit host. */
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#if HOST_BITS_PER_LONG >= 64 || !defined NEED_64BIT_HOST_WIDE_INT
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# define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG
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# define HOST_WIDE_INT long
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#else
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# if HOST_BITS_PER_LONGLONG >= 64
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# define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONGLONG
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# define HOST_WIDE_INT long long
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# else
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# if HOST_BITS_PER___INT64 >= 64
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# define HOST_BITS_PER_WIDE_INT HOST_BITS_PER___INT64
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# define HOST_WIDE_INT __int64
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# else
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#error "Unable to find a suitable type for HOST_WIDE_INT"
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# endif
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# endif
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#endif
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/* Various printf format strings for HOST_WIDE_INT. */
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#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
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# define HOST_WIDE_INT_PRINT HOST_LONG_FORMAT
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# define HOST_WIDE_INT_PRINT_C "L"
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# define HOST_WIDE_INT_1 1L
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/* 'long' might be 32 or 64 bits, and the number of leading zeroes
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must be tweaked accordingly. */
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# if HOST_BITS_PER_WIDE_INT == 64
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# define HOST_WIDE_INT_PRINT_DOUBLE_HEX \
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"0x%" HOST_LONG_FORMAT "x%016" HOST_LONG_FORMAT "x"
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# else
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# define HOST_WIDE_INT_PRINT_DOUBLE_HEX \
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"0x%" HOST_LONG_FORMAT "x%08" HOST_LONG_FORMAT "x"
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# endif
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#else
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# define HOST_WIDE_INT_PRINT HOST_LONG_LONG_FORMAT
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# define HOST_WIDE_INT_PRINT_C "LL"
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# define HOST_WIDE_INT_1 1LL
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/* We can assume that 'long long' is at least 64 bits. */
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# define HOST_WIDE_INT_PRINT_DOUBLE_HEX \
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"0x%" HOST_LONG_LONG_FORMAT "x%016" HOST_LONG_LONG_FORMAT "x"
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#endif /* HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG */
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#define HOST_WIDE_INT_PRINT_DEC "%" HOST_WIDE_INT_PRINT "d"
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#define HOST_WIDE_INT_PRINT_DEC_C HOST_WIDE_INT_PRINT_DEC HOST_WIDE_INT_PRINT_C
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#define HOST_WIDE_INT_PRINT_UNSIGNED "%" HOST_WIDE_INT_PRINT "u"
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#define HOST_WIDE_INT_PRINT_HEX "%#" HOST_WIDE_INT_PRINT "x"
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#define HOST_WIDE_INT_PRINT_HEX_PURE "%" HOST_WIDE_INT_PRINT "x"
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/* Set HOST_WIDEST_INT. This is a 64-bit type unless the compiler
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in use has no 64-bit type at all; in that case it's 32 bits. */
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#if HOST_BITS_PER_WIDE_INT >= 64 \
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|| (HOST_BITS_PER_LONGLONG < 64 && HOST_BITS_PER___INT64 < 64)
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# define HOST_WIDEST_INT HOST_WIDE_INT
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# define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_WIDE_INT
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# define HOST_WIDEST_INT_PRINT HOST_WIDE_INT_PRINT
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# define HOST_WIDEST_INT_PRINT_DEC HOST_WIDE_INT_PRINT_DEC
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# define HOST_WIDEST_INT_PRINT_DEC_C HOST_WIDE_INT_PRINT_DEC_C
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# define HOST_WIDEST_INT_PRINT_UNSIGNED HOST_WIDE_INT_PRINT_UNSIGNED
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# define HOST_WIDEST_INT_PRINT_HEX HOST_WIDE_INT_PRINT_HEX
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# define HOST_WIDEST_INT_PRINT_DOUBLE_HEX HOST_WIDE_INT_PRINT_DOUBLE_HEX
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#else
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# if HOST_BITS_PER_LONGLONG >= 64
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# define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_LONGLONG
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# define HOST_WIDEST_INT long long
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# else
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# if HOST_BITS_PER___INT64 >= 64
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# define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER___INT64
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# define HOST_WIDEST_INT __int64
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# else
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#error "This line should be impossible to reach"
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# endif
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# endif
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# define HOST_WIDEST_INT_PRINT HOST_LONG_LONG_FORMAT
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# define HOST_WIDEST_INT_PRINT_DEC "%" HOST_LONG_LONG_FORMAT "d"
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# define HOST_WIDEST_INT_PRINT_DEC_C "%" HOST_LONG_LONG_FORMAT "dLL"
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# define HOST_WIDEST_INT_PRINT_UNSIGNED "%" HOST_LONG_LONG_FORMAT "u"
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# define HOST_WIDEST_INT_PRINT_HEX "%#" HOST_LONG_LONG_FORMAT "x"
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# define HOST_WIDEST_INT_PRINT_DOUBLE_HEX \
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"0x%" HOST_LONG_LONG_FORMAT "x%016" HOST_LONG_LONG_FORMAT "x"
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#endif
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/* Define HOST_WIDEST_FAST_INT to the widest integer type supported
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efficiently in hardware. (That is, the widest integer type that fits
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in a hardware register.) Normally this is "long" but on some hosts it
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should be "long long" or "__int64". This is no convenient way to
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autodetect this, so such systems must set a flag in config.host; see there
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for details. */
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#ifdef USE_LONG_LONG_FOR_WIDEST_FAST_INT
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# ifdef HAVE_LONG_LONG
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# define HOST_WIDEST_FAST_INT long long
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# define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONGLONG
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# elif defined (HAVE___INT64)
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# define HOST_WIDEST_FAST_INT __int64
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# define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER___INT64
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# else
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# error "Your host said it wanted to use long long or __int64 but neither"
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# error "exist"
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# endif
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#else
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# define HOST_WIDEST_FAST_INT long
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# define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONG
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#endif
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/* Inline functions operating on HOST_WIDE_INT. */
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#if GCC_VERSION < 3004
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extern int clz_hwi (unsigned HOST_WIDE_INT x);
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extern int ctz_hwi (unsigned HOST_WIDE_INT x);
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extern int ffs_hwi (unsigned HOST_WIDE_INT x);
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/* Return log2, or -1 if not exact. */
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extern int exact_log2 (unsigned HOST_WIDE_INT);
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/* Return floor of log2, with -1 for zero. */
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extern int floor_log2 (unsigned HOST_WIDE_INT);
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#else /* GCC_VERSION >= 3004 */
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/* For convenience, define 0 -> word_size. */
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static inline int
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clz_hwi (unsigned HOST_WIDE_INT x)
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{
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if (x == 0)
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return HOST_BITS_PER_WIDE_INT;
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# if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
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return __builtin_clzl (x);
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# elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
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return __builtin_clzll (x);
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# else
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return __builtin_clz (x);
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# endif
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}
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static inline int
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ctz_hwi (unsigned HOST_WIDE_INT x)
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{
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if (x == 0)
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return HOST_BITS_PER_WIDE_INT;
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# if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
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return __builtin_ctzl (x);
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# elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
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return __builtin_ctzll (x);
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# else
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return __builtin_ctz (x);
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# endif
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}
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static inline int
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ffs_hwi (unsigned HOST_WIDE_INT x)
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{
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# if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
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return __builtin_ffsl (x);
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# elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
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return __builtin_ffsll (x);
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# else
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return __builtin_ffs (x);
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# endif
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}
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static inline int
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floor_log2 (unsigned HOST_WIDE_INT x)
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{
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return HOST_BITS_PER_WIDE_INT - 1 - clz_hwi (x);
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}
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static inline int
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exact_log2 (unsigned HOST_WIDE_INT x)
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{
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return x == (x & -x) && x ? ctz_hwi (x) : -1;
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}
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#endif /* GCC_VERSION >= 3004 */
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#define HOST_WIDE_INT_MIN (HOST_WIDE_INT) \
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((unsigned HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1))
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#define HOST_WIDE_INT_MAX (~(HOST_WIDE_INT_MIN))
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extern HOST_WIDE_INT abs_hwi (HOST_WIDE_INT);
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extern unsigned HOST_WIDE_INT absu_hwi (HOST_WIDE_INT);
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extern HOST_WIDE_INT gcd (HOST_WIDE_INT, HOST_WIDE_INT);
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extern HOST_WIDE_INT pos_mul_hwi (HOST_WIDE_INT, HOST_WIDE_INT);
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extern HOST_WIDE_INT mul_hwi (HOST_WIDE_INT, HOST_WIDE_INT);
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extern HOST_WIDE_INT least_common_multiple (HOST_WIDE_INT, HOST_WIDE_INT);
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#endif /* ! GCC_HWINT_H */
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