Return to hard-reg-set.h CVS log

Up to [Research Unix] / researchv10dc / cmd / gcc

Annotation of researchv10dc/cmd/gcc/hard-reg-set.h, revision 1.1

1.1     ! root        1: /* Sets (bit vectors) of hard registers, and operations on them.
        !             2:    Copyright (C) 1987 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU CC
        !             5: 
        !             6: GNU CC is distributed in the hope that it will be useful,
        !             7: but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: accepts responsibility to anyone for the consequences of using it
        !             9: or for whether it serves any particular purpose or works at all,
        !            10: unless he says so in writing.  Refer to the GNU CC General Public
        !            11: License for full details.
        !            12: 
        !            13: Everyone is granted permission to copy, modify and redistribute
        !            14: GNU CC, but only under the conditions described in the
        !            15: GNU CC General Public License.   A copy of this license is
        !            16: supposed to have been given to you along with GNU CC so you
        !            17: can know your rights and responsibilities.  It should be in a
        !            18: file named COPYING.  Among other things, the copyright notice
        !            19: and this notice must be preserved on all copies.  */
        !            20: 
        !            21: 
        !            22: /* Define the type of a set of hard registers.  */
        !            23: 
        !            24: /* If HARD_REG_SET is a macro, its definition is a scalar type
        !            25:    that has enough bits for all the target machine's hard registers.
        !            26:    Otherwise, it is a typedef for a suitable array of longs,
        !            27:    and HARD_REG_SET_LONGS is how many.  */
        !            28: 
        !            29: #if FIRST_PSEUDO_REGISTER <= HOST_BITS_PER_CHAR
        !            30: #define HARD_REG_SET char
        !            31: #else
        !            32: #if FIRST_PSEUDO_REGISTER <= HOST_BITS_PER_SHORT
        !            33: #define HARD_REG_SET short
        !            34: #else
        !            35: #if FIRST_PSEUDO_REGISTER <= HOST_BITS_PER_INT
        !            36: #define HARD_REG_SET int
        !            37: #else
        !            38: #if FIRST_PSEUDO_REGISTER <= HOST_BITS_PER_LONG
        !            39: #define HARD_REG_SET long
        !            40: #else
        !            41: #define HARD_REG_SET_LONGS \
        !            42:  ((FIRST_PSEUDO_REGISTER + HOST_BITS_PER_LONG - 1) / HOST_BITS_PER_LONG)
        !            43: typedef long HARD_REG_SET[HARD_REG_SET_LONGS];
        !            44: #endif
        !            45: #endif
        !            46: #endif
        !            47: #endif
        !            48: 
        !            49: /* Define macros SET_HARD_REG_BIT, CLEAR_HARD_REG_BIT and TEST_HARD_REG_BIT
        !            50:    to set, clear or test one bit in a hard reg set of type HARD_REG_SET.
        !            51:    All three take two arguments: the set and the register number.
        !            52: 
        !            53:    In the case where sets are arrays of longs, the first argument
        !            54:    is actually a pointer to a long.
        !            55: 
        !            56:    Define two macros for initializing a set:
        !            57:    CLEAR_HARD_REG_SET and SET_HARD_REG_SET.
        !            58:    These take just one argument.
        !            59: 
        !            60:    Also define macros for copying hard reg sets:
        !            61:    COPY_HARD_REG_SET and COMPL_HARD_REG_SET.
        !            62:    These take two arguments TO and FROM; they read from FROM
        !            63:    and store into TO.  COMPL_HARD_REG_SET complements each bit.
        !            64: 
        !            65:    Also define macros for combining hard reg sets:
        !            66:    IOR_HARD_REG_SET and AND_HARD_REG_SET.
        !            67:    These take two arguments TO and FROM; they read from FROM
        !            68:    and combine bitwise into TO.  Define also two variants
        !            69:    IOR_COMPL_HARD_REG_SET and AND_COMPL_HARD_REG_SET
        !            70:    which use the complement of the set FROM.
        !            71: 
        !            72:    Also define GO_IF_HARD_REG_SUBSET (X, Y, TO):
        !            73:    if X is a subset of Y, go to TO.
        !            74: */   
        !            75: 
        !            76: #ifdef HARD_REG_SET
        !            77: 
        !            78: #define SET_HARD_REG_BIT(SET, BIT)  \
        !            79:  ((SET) |= 1 << (BIT))
        !            80: #define CLEAR_HARD_REG_BIT(SET, BIT)  \
        !            81:  ((SET) &= ~(1 << (BIT)))
        !            82: #define TEST_HARD_REG_BIT(SET, BIT)  \
        !            83:  ((SET) & (1 << (BIT)))
        !            84: 
        !            85: #define CLEAR_HARD_REG_SET(TO) ((TO) = 0)
        !            86: #define SET_HARD_REG_SET(TO) ((TO) = -1)
        !            87: 
        !            88: #define COPY_HARD_REG_SET(TO, FROM) ((TO) = (FROM))
        !            89: #define COMPL_HARD_REG_SET(TO, FROM) ((TO) = ~(FROM))
        !            90: 
        !            91: #define IOR_HARD_REG_SET(TO, FROM) ((TO) |= (FROM))
        !            92: #define IOR_COMPL_HARD_REG_SET(TO, FROM) ((TO) |= ~ (FROM))
        !            93: #define AND_HARD_REG_SET(TO, FROM) ((TO) &= (FROM))
        !            94: #define AND_COMPL_HARD_REG_SET(TO, FROM) ((TO) &= ~ (FROM))
        !            95: 
        !            96: #define GO_IF_HARD_REG_SUBSET(X,Y,TO) if (0 == ((X) & ~(Y))) goto TO
        !            97: #else
        !            98: 
        !            99: #define SET_HARD_REG_BIT(SET, BIT)  \
        !           100:  ((SET)[(BIT) / HOST_BITS_PER_LONG] |= 1 << ((BIT) % HOST_BITS_PER_LONG))
        !           101: #define CLEAR_HARD_REG_BIT(SET, BIT)  \
        !           102:  ((SET)[(BIT) / HOST_BITS_PER_LONG] &= ~(1 << ((BIT) % HOST_BITS_PER_LONG)))
        !           103: #define TEST_HARD_REG_BIT(SET, BIT)  \
        !           104:  ((SET)[(BIT) / HOST_BITS_PER_LONG] & (1 << ((BIT) % HOST_BITS_PER_LONG)))
        !           105: 
        !           106: #define CLEAR_HARD_REG_SET(TO)  \
        !           107: { register long *scan_tp_ = (TO);                              \
        !           108:   register int i;                                              \
        !           109:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           110:     *scan_tp_++ = 0; }
        !           111: 
        !           112: #define SET_HARD_REG_SET(TO)  \
        !           113: { register long *scan_tp_ = (TO);                              \
        !           114:   register int i;                                              \
        !           115:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           116:     *scan_tp_++ = -1; }
        !           117: 
        !           118: #define COPY_HARD_REG_SET(TO, FROM)  \
        !           119: { register long *scan_tp_ = (TO), *scan_fp_ = (FROM);          \
        !           120:   register int i;                                              \
        !           121:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           122:     *scan_tp_++ = *scan_fp_++; }
        !           123: 
        !           124: #define COMPL_HARD_REG_SET(TO, FROM)  \
        !           125: { register long *scan_tp_ = (TO), *scan_fp_ = (FROM);          \
        !           126:   register int i;                                              \
        !           127:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           128:     *scan_tp_++ = ~ *scan_fp_++; }
        !           129: 
        !           130: #define AND_HARD_REG_SET(TO, FROM)  \
        !           131: { register long *scan_tp_ = (TO), *scan_fp_ = (FROM);          \
        !           132:   register int i;                                              \
        !           133:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           134:     *scan_tp_++ &= *scan_fp_++; }
        !           135: 
        !           136: #define AND_COMPL_HARD_REG_SET(TO, FROM)  \
        !           137: { register long *scan_tp_ = (TO), *scan_fp_ = (FROM);          \
        !           138:   register int i;                                              \
        !           139:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           140:     *scan_tp_++ &= ~ *scan_fp_++; }
        !           141: 
        !           142: #define IOR_HARD_REG_SET(TO, FROM)  \
        !           143: { register long *scan_tp_ = (TO), *scan_fp_ = (FROM);          \
        !           144:   register int i;                                              \
        !           145:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           146:     *scan_tp_++ |= *scan_fp_++; }
        !           147: 
        !           148: #define IOR_COMPL_HARD_REG_SET(TO, FROM)  \
        !           149: { register long *scan_tp_ = (TO), *scan_fp_ = (FROM);          \
        !           150:   register int i;                                              \
        !           151:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           152:     *scan_tp_++ |= ~ *scan_fp_++; }
        !           153: 
        !           154: #define GO_IF_HARD_REG_SUBSET(X,Y,TO)  \
        !           155: { register long *scan_xp_ = (X), *scan_yp_ = (Y);              \
        !           156:   register int i;                                              \
        !           157:   for (i = 0; i < HARD_REG_SET_LONGS; i++)                     \
        !           158:     if (0 != (*scan_xp_++ & ~*scan_yp_++)) break;              \
        !           159:   if (i == HARD_REG_SET_LONGS) goto TO; }
        !           160: 
        !           161: #endif
        !           162: 
        !           163: /* Define some standard sets of registers.  */
        !           164: 
        !           165: /* Indexed by hard register number, contains 1 for registers
        !           166:    that are fixed use (stack pointer, pc, frame pointer, etc.).
        !           167:    These are the registers that cannot be used to allocate
        !           168:    a pseudo reg whose life does not cross calls.  */
        !           169: 
        !           170: extern char fixed_regs[FIRST_PSEUDO_REGISTER];
        !           171: 
        !           172: /* The same info as a HARD_REG_SET.  */
        !           173: 
        !           174: extern HARD_REG_SET fixed_reg_set;
        !           175: 
        !           176: /* Indexed by hard register number, contains 1 for registers
        !           177:    that are fixed use or are clobbered by function calls.
        !           178:    These are the registers that cannot be used to allocate
        !           179:    a pseudo reg whose life crosses calls.  */
        !           180: 
        !           181: extern char call_used_regs[FIRST_PSEUDO_REGISTER];
        !           182: 
        !           183: /* The same info as a HARD_REG_SET.  */
        !           184: 
        !           185: extern HARD_REG_SET call_used_reg_set;
        !           186: 
        !           187: /* For each reg class, a HARD_REG_SET saying which registers are in it.  */
        !           188: 
        !           189: extern HARD_REG_SET reg_class_contents[];
        !           190: 
        !           191: /* For each reg class, table listing all the containing classes.  */
        !           192: 
        !           193: extern enum reg_class reg_class_superclasses[N_REG_CLASSES][N_REG_CLASSES];
        !           194: 
        !           195: /* For each reg class, table listing all the classes contained in it.  */
        !           196: 
        !           197: extern enum reg_class reg_class_subclasses[N_REG_CLASSES][N_REG_CLASSES];
        !           198: 
        !           199: /* For each pair of reg classes,
        !           200:    a largest reg class contained in their union.  */
        !           201: 
        !           202: extern enum reg_class reg_class_subunion[N_REG_CLASSES][N_REG_CLASSES];
        !           203: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.