X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fmachmode.def;h=fbaea1096a632e58e5c7b2efe1456c7d32a0d227;hb=26991c0d206a7ca1c6559d7217773ba51ea62805;hp=24d0ba5e07cb3fd8836c42f06c58119521a50c0f;hpb=6f4dbef8f39871ffcf157bd560476165939d70f9;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/machmode.def b/gcc/machmode.def index 24d0ba5e07c..fbaea1096a6 100644 --- a/gcc/machmode.def +++ b/gcc/machmode.def @@ -1,25 +1,26 @@ /* This file contains the definitions and documentation for the - machine modes used in the the GNU compiler. - Copyright (C) 1987, 1992, 1994 Free Software Foundation, Inc. + machine modes used in the GNU compiler. + Copyright (C) 1987, 1992, 1994, 1997, 1998, 2000, 2003, 2004, 2005, + 2007 Free Software Foundation, Inc. -This file is part of GNU CC. +This file is part of GCC. -GNU CC 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 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 3, or (at your option) any later +version. -GNU CC 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. +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 GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ +along with GCC; see the file COPYING3. If not see +. */ -/* This file defines all the MACHINE MODES used by GNU CC. +/* This file defines all the MACHINE MODES used by GCC. A machine mode specifies a size and format of data at the machine level. @@ -30,85 +31,214 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ has a machine mode which describes data of that type or the data of the variable declared. */ -/* The first argument is the internal name of the machine mode - used in the C source. - By convention these are in UPPER_CASE, except for the word "mode". - - The second argument is the name of the machine mode in the - external ASCII format used for reading and printing RTL and trees. - By convention these names in UPPER_CASE. - - Third argument states the kind of representation: - MODE_INT - integer - MODE_FLOAT - floating - MODE_PARTIAL_INT - PSImode and PDImode - MODE_CC - modes used for representing the condition code in a register - MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT - complex number - MODE_RANDOM - anything else - - Fourth argument is the relative size of the object, in bytes. - It is zero when the size is meaningless or not determined. - A byte's size is determined by BITS_PER_UNIT in tm.h. - - - Fifth arg is the relative size of subunits of the object. - It is same as the fourth argument except for complexes, - since they are really made of two equal size subunits. - - Sixth arg is next wider natural mode of the same class. - 0 if there is none. */ +/* This file is included by the genmodes program. Its text is the + body of a function. Do not rely on this, it will change in the + future. + + The following statements can be used in this file -- all have + the form of a C macro call. In their arguments: + + A CLASS argument must be one of the constants defined in + mode-classes.def, less the leading MODE_ prefix; some statements + that take CLASS arguments have restrictions on which classes are + acceptable. For instance, INT. + + A MODE argument must be the printable name of a machine mode, + without quotation marks or trailing "mode". For instance, SI. + + A PRECISION, BYTESIZE, or COUNT argument must be a positive integer + constant. + + A FORMAT argument must be one of the real_mode_format structures + declared in real.h, or else a literal 0. Do not put a leading & + on the argument. + + An EXPR argument must be a syntactically valid C expression. + If an EXPR contains commas, you may need to write an extra pair of + parentheses around it, so it appears to be a single argument to the + statement. + + This file defines only those modes which are of use on almost all + machines. Other modes can be defined in the target-specific + mode definition file, config/ARCH/ARCH-modes.def. + + Order matters in this file in so far as statements which refer to + other modes must appear after the modes they refer to. However, + statements which do not refer to other modes may appear in any + order. + + RANDOM_MODE (MODE); + declares MODE to be of class RANDOM. + + CC_MODE (MODE); + declares MODE to be of class CC. + + INT_MODE (MODE, BYTESIZE); + declares MODE to be of class INT and BYTESIZE bytes wide. + All of the bits of its representation are significant. + + FRACTIONAL_INT_MODE (MODE, PRECISION, BYTESIZE); + declares MODE to be of class INT, BYTESIZE bytes wide in + storage, but with only PRECISION significant bits. + + FLOAT_MODE (MODE, BYTESIZE, FORMAT); + declares MODE to be of class FLOAT and BYTESIZE bytes wide, + using floating point format FORMAT. + All of the bits of its representation are significant. + + DECIMAL FLOAT_MODE (MODE, BYTESIZE); + declares MODE to be of class DECIMAL_FLOAT and BYTESIZE bytes + wide. All of the bits of its representation are significant. + + FRACTIONAL_FLOAT_MODE (MODE, PRECISION, BYTESIZE, FORMAT); + declares MODE to be of class FLOAT, BYTESIZE bytes wide in + storage, but with only PRECISION significant bits, using + floating point format FORMAT. + + FRACT_MODE (MODE, BYTESIZE, FBIT); + declares MODE to be of class FRACT and BYTESIZE bytes wide + with FBIT fractional bits. There may be padding bits. + + UFRACT_MODE (MODE, BYTESIZE, FBIT); + declares MODE to be of class UFRACT and BYTESIZE bytes wide + with FBIT fractional bits. There may be padding bits. + + ACCUM_MODE (MODE, BYTESIZE, IBIT, FBIT); + declares MODE to be of class ACCUM and BYTESIZE bytes wide + with IBIT integral bits and FBIT fractional bits. + There may be padding bits. + + UACCUM_MODE (MODE, BYTESIZE, FBIT); + declares MODE to be of class UACCUM and BYTESIZE bytes wide + with IBIT integral bits and FBIT fractional bits. + There may be padding bits. + + RESET_FLOAT_FORMAT (MODE, FORMAT); + changes the format of MODE, which must be class FLOAT, + to FORMAT. Use in an ARCH-modes.def to reset the format + of one of the float modes defined in this file. + + PARTIAL_INT_MODE (MODE); + declares a mode of class PARTIAL_INT with the same size as + MODE (which must be an INT mode). The name of the new mode + is made by prefixing a P to the name MODE. This statement + may grow a PRECISION argument in the future. + + VECTOR_MODE (CLASS, MODE, COUNT); + Declare a vector mode whose component mode is MODE (of class + CLASS) with COUNT components. CLASS must be INT or FLOAT. + The name of the vector mode takes the form VnX where n is + COUNT in decimal and X is MODE. + + VECTOR_MODES (CLASS, WIDTH); + For all modes presently declared in class CLASS, construct + corresponding vector modes having width WIDTH. Modes whose + byte sizes do not evenly divide WIDTH are ignored, as are + modes that would produce vector modes with only one component, + and modes smaller than one byte (if CLASS is INT) or smaller + than two bytes (if CLASS is FLOAT). CLASS must be INT or + FLOAT. The names follow the same rule as VECTOR_MODE uses. + + COMPLEX_MODES (CLASS); + For all modes presently declared in class CLASS, construct + corresponding complex modes. Modes smaller than one byte + are ignored. For FLOAT modes, the names are derived by + replacing the 'F' in the mode name with a 'C'. (It is an + error if there is no 'F'. For INT modes, the names are + derived by prefixing a C to the name. + + ADJUST_BYTESIZE (MODE, EXPR); + ADJUST_ALIGNMENT (MODE, EXPR); + ADJUST_FLOAT_FORMAT (MODE, EXPR); + ADJUST_IBIT (MODE, EXPR); + ADJUST_FBIT (MODE, EXPR); + Arrange for the byte size, alignment, floating point format, ibit, + or fbit of MODE to be adjustable at run time. EXPR will be executed + once after processing all command line options, and should + evaluate to the desired byte size, alignment, format, ibit or fbit. + + Unlike a FORMAT argument, if you are adjusting a float format + you must put an & in front of the name of each format structure. + + Note: If a mode is ever made which is more than 255 bytes wide, + machmode.h and genmodes.c will have to be changed to allocate + more space for the mode_size and mode_alignment arrays. */ /* VOIDmode is used when no mode needs to be specified, as for example on CONST_INT RTL expressions. */ -DEF_MACHMODE (VOIDmode, "VOID", MODE_RANDOM, 0, 0, VOIDmode) - -DEF_MACHMODE (QImode, "QI", MODE_INT, 1, 1, HImode) /* int types */ -DEF_MACHMODE (HImode, "HI", MODE_INT, 2, 2, SImode) -/* Pointers on some machines use this type to distinguish them from ints. - Useful if a pointer is 4 bytes but has some bits that are not significant, - so it is really not quite as wide as an integer. */ -DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, 4, 4, VOIDmode) -DEF_MACHMODE (SImode, "SI", MODE_INT, 4, 4, DImode) -DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, 8, 8, VOIDmode) -DEF_MACHMODE (DImode, "DI", MODE_INT, 8, 8, TImode) -DEF_MACHMODE (TImode, "TI", MODE_INT, 16, 16, OImode) -DEF_MACHMODE (OImode, "OI", MODE_INT, 32, 32, VOIDmode) - -DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, 1, 1, HFmode) -DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, 2, 2, TQFmode) -DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, 3, 3, SFmode) /* MIL-STD-1750A */ -DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, 4, 4, DFmode) -DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, 8, 8, XFmode) -DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, 12, 12, TFmode) /* IEEE extended */ -DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, 16, 16, VOIDmode) - -/* Complex modes. */ -DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, 8, 4, DCmode) -DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, 16, 8, XCmode) -DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, 24, 12, TCmode) -DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, 32, 16, VOIDmode) - -DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, 2, 1, CHImode) -DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, 4, 2, CSImode) -DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, 8, 4, CDImode) -DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, 16, 8, CTImode) -DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, 32, 16, COImode) -DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, 64, 32, VOIDmode) +RANDOM_MODE (VOID); /* BLKmode is used for structures, arrays, etc. that fit no more specific mode. */ -DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, VOIDmode) +RANDOM_MODE (BLK); + +/* Single bit mode used for booleans. */ +FRACTIONAL_INT_MODE (BI, 1, 1); + +/* Basic integer modes. We go up to TI in generic code (128 bits). + The name OI is reserved for a 256-bit type (needed by some back ends). + FIXME TI shouldn't be generically available either. */ +INT_MODE (QI, 1); +INT_MODE (HI, 2); +INT_MODE (SI, 4); +INT_MODE (DI, 8); +INT_MODE (TI, 16); + +/* No partial integer modes are defined by default. */ + +/* Basic floating point modes. SF and DF are the only modes provided + by default. The names QF, HF, XF, and TF are reserved for targets + that need 1-word, 2-word, 80-bit, or 128-bit float types respectively. + + These are the IEEE mappings. They can be overridden with + RESET_FLOAT_FORMAT or at runtime (in OVERRIDE_OPTIONS). */ + +FLOAT_MODE (SF, 4, ieee_single_format); +FLOAT_MODE (DF, 8, ieee_double_format); + +/* Basic CC modes. + FIXME define this only for targets that need it. */ +CC_MODE (CC); + +/* Fixed-point modes. */ +FRACT_MODE (QQ, 1, 7); /* s.7 */ +FRACT_MODE (HQ, 2, 15); /* s.15 */ +FRACT_MODE (SQ, 4, 31); /* s.31 */ +FRACT_MODE (DQ, 8, 63); /* s.63 */ +FRACT_MODE (TQ, 16, 127); /* s.127 */ + +UFRACT_MODE (UQQ, 1, 8); /* .8 */ +UFRACT_MODE (UHQ, 2, 16); /* .16 */ +UFRACT_MODE (USQ, 4, 32); /* .32 */ +UFRACT_MODE (UDQ, 8, 64); /* .64 */ +UFRACT_MODE (UTQ, 16, 128); /* .128 */ + +ACCUM_MODE (HA, 2, 8, 7); /* s8.7 */ +ACCUM_MODE (SA, 4, 16, 15); /* s16.15 */ +ACCUM_MODE (DA, 8, 32, 31); /* s32.31 */ +ACCUM_MODE (TA, 16, 64, 63); /* s64.63 */ + +UACCUM_MODE (UHA, 2, 8, 8); /* 8.8 */ +UACCUM_MODE (USA, 4, 16, 16); /* 16.16 */ +UACCUM_MODE (UDA, 8, 32, 32); /* 32.32 */ +UACCUM_MODE (UTA, 16, 64, 64); /* 64.64 */ + +/* Allow the target to specify additional modes of various kinds. */ +#if HAVE_EXTRA_MODES +# include EXTRA_MODES_FILE +#endif -/* The modes for representing the condition codes come last. CCmode is - always defined. Additional modes for the condition code can be specified - in the EXTRA_CC_MODES macro. Everything but the names of the modes - are copied from CCmode. For these modes, GET_MODE_WIDER_MODE points - to the next defined CC mode, if any. */ +/* Complex modes. */ +COMPLEX_MODES (INT); +COMPLEX_MODES (FLOAT); -DEF_MACHMODE (CCmode, "CC", MODE_CC, 4, 4, VOIDmode) +/* Decimal floating point modes. */ +DECIMAL_FLOAT_MODE (SD, 4, decimal_single_format); +DECIMAL_FLOAT_MODE (DD, 8, decimal_double_format); +DECIMAL_FLOAT_MODE (TD, 16, decimal_quad_format); /* The symbol Pmode stands for one of the above machine modes (usually SImode). - The tm file specifies which one. It is not a distinct mode. */ + The tm.h file specifies which one. It is not a distinct mode. */ /* Local variables: