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Diffstat (limited to 'contrib/gcc/machmode.def')
| -rw-r--r-- | contrib/gcc/machmode.def | 295 |
1 files changed, 173 insertions, 122 deletions
diff --git a/contrib/gcc/machmode.def b/contrib/gcc/machmode.def index 5013e1f..0b6c677 100644 --- a/contrib/gcc/machmode.def +++ b/contrib/gcc/machmode.def @@ -1,6 +1,7 @@ /* This file contains the definitions and documentation for the machine modes used in the GNU compiler. - Copyright (C) 1987, 1992, 1994, 1997, 1998, 2000 Free Software Foundation, Inc. + Copyright (C) 1987, 1992, 1994, 1997, 1998, 2000, 2003 + Free Software Foundation, Inc. This file is part of GCC. @@ -31,142 +32,192 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 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 - PQImode, PHImode, PSImode and PDImode - MODE_CC - modes used for representing the condition code in a register - MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT - complex number - MODE_VECTOR_INT, MODE_VECTOR_FLOAT - vector - MODE_RANDOM - anything else - - Fourth argument is the relative size of the object, in bits, - so we can have modes smaller than 1 byte. - - Fifth 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. - - Sixth arg is the relative size of subunits of the object. - It is same as the fifth argument except for complexes and vectors, - since they are really made of many equal size subunits. - - Seventh arg is next wider natural mode of the same class. 0 if - there is none. Vector modes use this field to point to the next - vector size, so we can iterate through the different vectors modes. - The ordering is by increasing byte size, with QI coming before HI, - HI before SI, etc. - - Eigth arg is the mode of the internal elements in a vector or - complex, and VOIDmode if not applicable. -*/ +/* 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 restructions 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. + + 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); + Arrange for the byte size, alignment, or floating point format + 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, or format. + + 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, 0, VOIDmode, VOIDmode) - -DEF_MACHMODE (BImode, "BI", MODE_INT, 1, 1, 1, QImode, VOIDmode) -DEF_MACHMODE (QImode, "QI", MODE_INT, BITS_PER_UNIT, 1, 1, HImode, VOIDmode) -DEF_MACHMODE (HImode, "HI", MODE_INT, BITS_PER_UNIT*2, 2, 2, SImode, VOIDmode) -DEF_MACHMODE (SImode, "SI", MODE_INT, BITS_PER_UNIT*4, 4, 4, DImode, VOIDmode) -DEF_MACHMODE (DImode, "DI", MODE_INT, BITS_PER_UNIT*8, 8, 8, TImode, VOIDmode) -DEF_MACHMODE (TImode, "TI", MODE_INT, BITS_PER_UNIT*16, 16, 16, OImode, VOIDmode) -DEF_MACHMODE (OImode, "OI", MODE_INT, BITS_PER_UNIT*32, 32, 32, VOIDmode, VOIDmode) - -/* Pointers on some machines use these types 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 (PQImode, "PQI", MODE_PARTIAL_INT, BITS_PER_UNIT, 1, 1, PHImode, VOIDmode) -DEF_MACHMODE (PHImode, "PHI", MODE_PARTIAL_INT, BITS_PER_UNIT*2, 2, 2, PSImode, VOIDmode) -DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, BITS_PER_UNIT*4, 4, 4, PDImode, VOIDmode) -DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, BITS_PER_UNIT*8, 8, 8, VOIDmode, VOIDmode) - -DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, BITS_PER_UNIT, 1, 1, HFmode, VOIDmode) -DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, BITS_PER_UNIT*2, 2, 2, TQFmode, VOIDmode) -DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, BITS_PER_UNIT*3, 3, 3, SFmode, VOIDmode) /* MIL-STD-1750A */ -DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, BITS_PER_UNIT*4, 4, 4, DFmode, VOIDmode) -DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, BITS_PER_UNIT*8, 8, 8, XFmode, VOIDmode) -DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, BITS_PER_UNIT*12, 12, 12, TFmode, VOIDmode) /* IEEE extended */ -DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, BITS_PER_UNIT*16, 16, 16, VOIDmode, VOIDmode) +RANDOM_MODE (VOID); -/* Complex modes. */ -DEF_MACHMODE (QCmode, "QC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*2, 2, 1, HCmode, QFmode) -DEF_MACHMODE (HCmode, "HC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*4, 4, 2, SCmode, HFmode) -DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*8, 8, 4, DCmode, SFmode) -DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*16, 16, 8, XCmode, DFmode) -DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*24, 24, 12, TCmode, XFmode) -DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*32, 32, 16, VOIDmode, TFmode) - -DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, BITS_PER_UNIT*2, 2, 1, CHImode, QImode) -DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, BITS_PER_UNIT*4, 4, 2, CSImode, HImode) -DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, BITS_PER_UNIT*8, 8, 4, CDImode, SImode) -DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, BITS_PER_UNIT*16, 16, 8, CTImode, DImode) -DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, BITS_PER_UNIT*32, 32, 16, COImode, TImode) -DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, BITS_PER_UNIT*64, 64, 32, VOIDmode, OImode) +/* BLKmode is used for structures, arrays, etc. + that fit no more specific mode. */ +RANDOM_MODE (BLK); -/* Vector modes. */ -/* The wider mode field for vectors follows in order of increasing bit - size with QI coming before HI, HI before SI, and SI before DI - within same bit sizes. */ -DEF_MACHMODE (V1DImode, "V1DI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 8, V2QImode, DImode) -DEF_MACHMODE (V2QImode, "V2QI", MODE_VECTOR_INT, BITS_PER_UNIT*2, 2, 1, V4QImode, QImode) -DEF_MACHMODE (V2HImode, "V2HI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 2, V8QImode, HImode) -DEF_MACHMODE (V2SImode, "V2SI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 4, V16QImode, SImode) -DEF_MACHMODE (V2DImode, "V2DI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 8, V8SImode, DImode) +/* Single bit mode used for booleans. */ +FRACTIONAL_INT_MODE (BI, 1, 1); -DEF_MACHMODE (V4QImode, "V4QI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 1, V2HImode, QImode) -DEF_MACHMODE (V4HImode, "V4HI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 2, V2SImode, HImode) -DEF_MACHMODE (V4SImode, "V4SI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 4, V2DImode, SImode) -DEF_MACHMODE (V4DImode, "V4DI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 8, V8DImode, DImode) +/* 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); -DEF_MACHMODE (V8QImode, "V8QI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 1, V4HImode, QImode) -DEF_MACHMODE (V8HImode, "V8HI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 2, V4SImode, HImode) -DEF_MACHMODE (V8SImode, "V8SI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 4, V4DImode, SImode) -DEF_MACHMODE (V8DImode, "V8DI", MODE_VECTOR_INT, BITS_PER_UNIT*64, 64, 8, VOIDmode, DImode) +/* No partial integer modes are defined by default. */ -DEF_MACHMODE (V16QImode, "V16QI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 1, V8HImode, QImode) +/* 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. -DEF_MACHMODE (V2SFmode, "V2SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*8, 8, 4, V4SFmode, SFmode) -DEF_MACHMODE (V2DFmode, "V2DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 8, V8SFmode, DFmode) + These are the IEEE mappings. They can be overridden with + RESET_FLOAT_FORMAT or at runtime (in OVERRIDE_OPTIONS). */ -DEF_MACHMODE (V4SFmode, "V4SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 4, V2DFmode, SFmode) -DEF_MACHMODE (V4DFmode, "V4DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 8, V8DFmode, DFmode) +FLOAT_MODE (SF, 4, ieee_single_format); +FLOAT_MODE (DF, 8, ieee_double_format); -DEF_MACHMODE (V8SFmode, "V8SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 4,V4DFmode, SFmode) -DEF_MACHMODE (V8DFmode, "V8DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*64, 64, 8, VOIDmode, DFmode) -DEF_MACHMODE (V16SFmode, "V16SF", MODE_VECTOR_FLOAT, 512, 64, 4, VOIDmode, SFmode) +/* Basic CC modes. + FIXME define this only for targets that need it. */ +CC_MODE (CC); -/* BLKmode is used for structures, arrays, etc. - that fit no more specific mode. */ -DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, 0, VOIDmode, VOIDmode) - -/* 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 header. All MODE_CC modes are the - same width as SImode and have VOIDmode as their next wider mode. */ - -/* We do not use CC() for CCmode to avoid a warning about use of - function-like macros with no arguments. */ -DEF_MACHMODE (CCmode, "CC", MODE_CC, BITS_PER_UNIT*4, 4, 4, VOIDmode, VOIDmode) - -#ifdef EXTRA_MODES_FILE -#define CC(N) \ - DEF_MACHMODE (CONCAT2 (N,mode), STRINGX (N), \ - MODE_CC, BITS_PER_UNIT*4, 4, 4, VOIDmode, VOIDmode) -#include EXTRA_MODES_FILE -#undef CC +/* 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); + +/* Vector modes. */ +VECTOR_MODES (INT, 2); /* V2QI */ +VECTOR_MODES (INT, 4); /* V4QI V2HI */ +VECTOR_MODES (INT, 8); /* V8QI V4HI V2SI */ +VECTOR_MODES (INT, 16); /* V16QI V8HI V4SI V2DI */ +/* VECTOR_MODES (INT, 32); V8SI V4DI */ +/* VECTOR_MODES (INT, 64); V8DI */ + +VECTOR_MODE (INT, SI, 8) +VECTOR_MODE (INT, DI, 4); +VECTOR_MODE (INT, DI, 8); + +/* PPC uses this to distinguish between DImode passed in + float registers and DImode passed in vector registers. + It would be in rs6000-modes.def but it's referenced in + c-common.c. FIXME. */ + +VECTOR_MODE (INT, DI, 1); + +VECTOR_MODES (FLOAT, 4); /* V2HF */ +VECTOR_MODES (FLOAT, 8); /* V4HF V2SF */ +VECTOR_MODES (FLOAT, 16); /* V8HF V4SF V2DF */ +/* VECTOR_MODES (FLOAT, 32); V8SF V4DF */ +/* VECTOR_MODES (FLOAT, 64); V16SF V8DF */ + +VECTOR_MODE (FLOAT, SF, 8); +VECTOR_MODE (FLOAT, SF, 16); +VECTOR_MODE (FLOAT, DF, 4); +VECTOR_MODE (FLOAT, DF, 8); + /* 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: |
