From 1bc5aee63eb72b341f506ad058502cd0361f0d10 Mon Sep 17 00:00:00 2001 From: Ben Cheng Date: Tue, 25 Mar 2014 22:37:19 -0700 Subject: Initial checkin of GCC 4.9.0 from trunk (r208799). Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba --- gcc-4.9/gcc/machmode.def | 254 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 254 insertions(+) create mode 100644 gcc-4.9/gcc/machmode.def (limited to 'gcc-4.9/gcc/machmode.def') diff --git a/gcc-4.9/gcc/machmode.def b/gcc-4.9/gcc/machmode.def new file mode 100644 index 000000000..38d3b0187 --- /dev/null +++ b/gcc-4.9/gcc/machmode.def @@ -0,0 +1,254 @@ +/* This file contains the definitions and documentation for the + machine modes used in the GNU compiler. + Copyright (C) 1987-2014 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 3, 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 COPYING3. If not see +. */ + + +/* This file defines all the MACHINE MODES used by GCC. + + A machine mode specifies a size and format of data + at the machine level. + + Each RTL expression has a machine mode. + + At the syntax tree level, each ..._TYPE and each ..._DECL node + has a machine mode which describes data of that type or the + data of the variable declared. */ + +/* 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. + + 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. + + DECIMAL_FLOAT_MODE (MODE, BYTESIZE, FORMAT); + declares MODE to be of class DECIMAL_FLOAT and BYTESIZE bytes + wide. All of the bits of its representation are significant. + + FRACTIONAL_DECIMAL_FLOAT_MODE (MODE, BYTESIZE, FORMAT); + declares MODE to be of class DECIMAL_FLOAT and BYTESIZE bytes + wide. All of the bits of its representation are significant. + + 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, IBIT, 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, PRECISION, NAME); + declares a mode of class PARTIAL_INT with the same size as + MODE (which must be an INT mode) and precision PREC. + Optionally, NAME is the new name of the mode. NAME is the + name of the mode. + + 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. */ +RANDOM_MODE (VOID); + +/* BLKmode is used for structures, arrays, etc. + that fit no more specific mode. */ +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). + TImode is needed here because the some front ends now genericly + support __int128. If the front ends decide to generically support + larger types, then corresponding modes must be added here. The + name OI is reserved for a 256-bit type (needed by some back ends). + */ +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 TARGET_OPTION_OVERRIDE). */ + +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 + +/* Complex modes. */ +COMPLEX_MODES (INT); +COMPLEX_MODES (FLOAT); + +/* 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.h file specifies which one. It is not a distinct mode. */ + +/* +Local variables: +mode:c +version-control: t +End: +*/ -- cgit v1.2.3