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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/double-int.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/double-int.c | 401 |
1 files changed, 0 insertions, 401 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/double-int.c b/gcc-4.2.1-5666.3/gcc/double-int.c deleted file mode 100644 index 3be0abf4f..000000000 --- a/gcc-4.2.1-5666.3/gcc/double-int.c +++ /dev/null @@ -1,401 +0,0 @@ -/* Operations with long integers. - Copyright (C) 2006 Free Software Foundation, Inc. - -This file is part of GCC. - -GCC is free software; you can redistribute it and/or modify it -under the terms of the GNU General Public License as published by the -Free Software Foundation; either version 2, or (at your option) any -later version. - -GCC is distributed in the hope that it will be useful, but WITHOUT -ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -for more details. - -You should have received a copy of the GNU General Public License -along with GCC; see the file COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - -#include "config.h" -#include "system.h" -#include "coretypes.h" -#include "tm.h" -#include "tree.h" - -/* Returns mask for PREC bits. */ - -static inline double_int -double_int_mask (unsigned prec) -{ - unsigned HOST_WIDE_INT m; - double_int mask; - - if (prec > HOST_BITS_PER_WIDE_INT) - { - prec -= HOST_BITS_PER_WIDE_INT; - m = ((unsigned HOST_WIDE_INT) 2 << (prec - 1)) - 1; - mask.high = (HOST_WIDE_INT) m; - mask.low = ALL_ONES; - } - else - { - mask.high = 0; - mask.low = ((unsigned HOST_WIDE_INT) 2 << (prec - 1)) - 1; - } - - return mask; -} - -/* Clears the bits of CST over the precision PREC. If UNS is false, the bits - outside of the precision are set to the sign bit (i.e., the PREC-th one), - otherwise they are set to zero. - - This corresponds to returning the value represented by PREC lowermost bits - of CST, with the given signedness. */ - -double_int -double_int_ext (double_int cst, unsigned prec, bool uns) -{ - if (uns) - return double_int_zext (cst, prec); - else - return double_int_sext (cst, prec); -} - -/* The same as double_int_ext with UNS = true. */ - -double_int -double_int_zext (double_int cst, unsigned prec) -{ - double_int mask = double_int_mask (prec); - double_int r; - - r.low = cst.low & mask.low; - r.high = cst.high & mask.high; - - return r; -} - -/* The same as double_int_ext with UNS = false. */ - -double_int -double_int_sext (double_int cst, unsigned prec) -{ - double_int mask = double_int_mask (prec); - double_int r; - unsigned HOST_WIDE_INT snum; - - if (prec <= HOST_BITS_PER_WIDE_INT) - snum = cst.low; - else - { - prec -= HOST_BITS_PER_WIDE_INT; - snum = (unsigned HOST_WIDE_INT) cst.high; - } - if (((snum >> (prec - 1)) & 1) == 1) - { - r.low = cst.low | ~mask.low; - r.high = cst.high | ~mask.high; - } - else - { - r.low = cst.low & mask.low; - r.high = cst.high & mask.high; - } - - return r; -} - -/* Constructs long integer from tree CST. The extra bits over the precision of - the number are filled with sign bit if CST is signed, and with zeros if it - is unsigned. */ - -double_int -tree_to_double_int (tree cst) -{ - /* We do not need to call double_int_restrict here to ensure the semantics as - described, as this is the default one for trees. */ - return TREE_INT_CST (cst); -} - -/* Returns true if CST fits in unsigned HOST_WIDE_INT. */ - -bool -double_int_fits_in_uhwi_p (double_int cst) -{ - return cst.high == 0; -} - -/* Returns true if CST fits in signed HOST_WIDE_INT. */ - -bool -double_int_fits_in_shwi_p (double_int cst) -{ - if (cst.high == 0) - return (HOST_WIDE_INT) cst.low >= 0; - else if (cst.high == -1) - return (HOST_WIDE_INT) cst.low < 0; - else - return false; -} - -/* Returns true if CST fits in HOST_WIDE_INT if UNS is false, or in - unsigned HOST_WIDE_INT if UNS is true. */ - -bool -double_int_fits_in_hwi_p (double_int cst, bool uns) -{ - if (uns) - return double_int_fits_in_uhwi_p (cst); - else - return double_int_fits_in_shwi_p (cst); -} - -/* Returns value of CST as a signed number. CST must satisfy - double_int_fits_in_shwi_p. */ - -HOST_WIDE_INT -double_int_to_shwi (double_int cst) -{ - return (HOST_WIDE_INT) cst.low; -} - -/* Returns value of CST as an unsigned number. CST must satisfy - double_int_fits_in_uhwi_p. */ - -unsigned HOST_WIDE_INT -double_int_to_uhwi (double_int cst) -{ - return cst.low; -} - -/* Returns A * B. */ - -double_int -double_int_mul (double_int a, double_int b) -{ - double_int ret; - mul_double (a.low, a.high, b.low, b.high, &ret.low, &ret.high); - return ret; -} - -/* Returns A + B. */ - -double_int -double_int_add (double_int a, double_int b) -{ - double_int ret; - add_double (a.low, a.high, b.low, b.high, &ret.low, &ret.high); - return ret; -} - -/* Returns -A. */ - -double_int -double_int_neg (double_int a) -{ - double_int ret; - neg_double (a.low, a.high, &ret.low, &ret.high); - return ret; -} - -/* Returns A / B (computed as unsigned depending on UNS, and rounded as - specified by CODE). CODE is enum tree_code in fact, but double_int.h - must be included before tree.h. The remainder after the division is - stored to MOD. */ - -double_int -double_int_divmod (double_int a, double_int b, bool uns, unsigned code, - double_int *mod) -{ - double_int ret; - - div_and_round_double (code, uns, a.low, a.high, b.low, b.high, - &ret.low, &ret.high, &mod->low, &mod->high); - return ret; -} - -/* The same as double_int_divmod with UNS = false. */ - -double_int -double_int_sdivmod (double_int a, double_int b, unsigned code, double_int *mod) -{ - return double_int_divmod (a, b, false, code, mod); -} - -/* The same as double_int_divmod with UNS = true. */ - -double_int -double_int_udivmod (double_int a, double_int b, unsigned code, double_int *mod) -{ - return double_int_divmod (a, b, true, code, mod); -} - -/* Returns A / B (computed as unsigned depending on UNS, and rounded as - specified by CODE). CODE is enum tree_code in fact, but double_int.h - must be included before tree.h. */ - -double_int -double_int_div (double_int a, double_int b, bool uns, unsigned code) -{ - double_int mod; - - return double_int_divmod (a, b, uns, code, &mod); -} - -/* The same as double_int_div with UNS = false. */ - -double_int -double_int_sdiv (double_int a, double_int b, unsigned code) -{ - return double_int_div (a, b, false, code); -} - -/* The same as double_int_div with UNS = true. */ - -double_int -double_int_udiv (double_int a, double_int b, unsigned code) -{ - return double_int_div (a, b, true, code); -} - -/* Returns A % B (computed as unsigned depending on UNS, and rounded as - specified by CODE). CODE is enum tree_code in fact, but double_int.h - must be included before tree.h. */ - -double_int -double_int_mod (double_int a, double_int b, bool uns, unsigned code) -{ - double_int mod; - - double_int_divmod (a, b, uns, code, &mod); - return mod; -} - -/* The same as double_int_mod with UNS = false. */ - -double_int -double_int_smod (double_int a, double_int b, unsigned code) -{ - return double_int_mod (a, b, false, code); -} - -/* The same as double_int_mod with UNS = true. */ - -double_int -double_int_umod (double_int a, double_int b, unsigned code) -{ - return double_int_mod (a, b, true, code); -} - -/* Constructs tree in type TYPE from with value given by CST. */ - -tree -double_int_to_tree (tree type, double_int cst) -{ - cst = double_int_ext (cst, TYPE_PRECISION (type), TYPE_UNSIGNED (type)); - - return build_int_cst_wide (type, cst.low, cst.high); -} - -/* Returns true if CST is negative. Of course, CST is considered to - be signed. */ - -bool -double_int_negative_p (double_int cst) -{ - return cst.high < 0; -} - -/* Returns -1 if A < B, 0 if A == B and 1 if A > B. Signedness of the - comparison is given by UNS. */ - -int -double_int_cmp (double_int a, double_int b, bool uns) -{ - if (uns) - return double_int_ucmp (a, b); - else - return double_int_scmp (a, b); -} - -/* Compares two unsigned values A and B. Returns -1 if A < B, 0 if A == B, - and 1 if A > B. */ - -int -double_int_ucmp (double_int a, double_int b) -{ - if ((unsigned HOST_WIDE_INT) a.high < (unsigned HOST_WIDE_INT) b.high) - return -1; - if ((unsigned HOST_WIDE_INT) a.high > (unsigned HOST_WIDE_INT) b.high) - return 1; - if (a.low < b.low) - return -1; - if (a.low > b.low) - return 1; - - return 0; -} - -/* Compares two signed values A and B. Returns -1 if A < B, 0 if A == B, - and 1 if A > B. */ - -int -double_int_scmp (double_int a, double_int b) -{ - if (a.high < b.high) - return -1; - if (a.high > b.high) - return 1; - if ((HOST_WIDE_INT) a.low < (HOST_WIDE_INT) b.low) - return -1; - if ((HOST_WIDE_INT) a.low > (HOST_WIDE_INT) b.low) - return 1; - - return 0; -} - -/* Splits last digit of *CST (taken as unsigned) in BASE and returns it. */ - -static unsigned -double_int_split_digit (double_int *cst, unsigned base) -{ - unsigned HOST_WIDE_INT resl, reml; - HOST_WIDE_INT resh, remh; - - div_and_round_double (FLOOR_DIV_EXPR, true, cst->low, cst->high, base, 0, - &resl, &resh, &reml, &remh); - cst->high = resh; - cst->low = resl; - - return reml; -} - -/* Dumps CST to FILE. If UNS is true, CST is considered to be unsigned, - otherwise it is signed. */ - -void -dump_double_int (FILE *file, double_int cst, bool uns) -{ - unsigned digits[100], n; - int i; - - if (double_int_zero_p (cst)) - { - fprintf (file, "0"); - return; - } - - if (!uns && double_int_negative_p (cst)) - { - fprintf (file, "-"); - cst = double_int_neg (cst); - } - - for (n = 0; !double_int_zero_p (cst); n++) - digits[n] = double_int_split_digit (&cst, 10); - for (i = n - 1; i >= 0; i--) - fprintf (file, "%u", digits[i]); -} |