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Annotation of GNUtools/cctools/include/architecture/m88k/reg_help.h, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1991 NeXT Computer, Inc.  All rights reserved.
                      2:  *
                      3:  *     File:   architecture/m88k/reg_help.h
                      4:  *     Author: Mike DeMoney, NeXT Computer, Inc.
                      5:  *
                      6:  *     This header file defines cpp macros useful for defining
                      7:  *     machine register and doing machine-level operations.
                      8:  *
                      9:  * HISTORY
                     10:  * 23-Jan-91  Mike DeMoney ([email protected])
                     11:  *     Created.
                     12:  */
                     13: 
                     14: #ifndef _ARCH_M88K_REG_HELP_H_
                     15: #define _ARCH_M88K_REG_HELP_H_
                     16: 
                     17: #import <architecture/nrw/reg_help.h>
                     18: 
                     19: /* Stack pointer must always be a multiple of 16 */
                     20: #define        STACK_INCR      16
                     21: #define        ROUND_FRAME(x)  ((((unsigned)(x)) + STACK_INCR - 1) & ~(STACK_INCR-1))
                     22: 
                     23: /*
                     24:  * REG_PAIR_DEF -- define a register pair
                     25:  * Register pairs are appropriately aligned to allow access via
                     26:  * ld.d and st.d.
                     27:  *
                     28:  * Usage:
                     29:  *     struct foo {
                     30:  *             REG_PAIR_DEF(
                     31:  *                     bar_t *,        barp,
                     32:  *                     afu_t,          afu
                     33:  *             );
                     34:  *     };
                     35:  *
                     36:  * Access to individual entries of the pair is via the REG_PAIR
                     37:  * macro (below).
                     38:  */
                     39: #define        REG_PAIR_DEF(type0, name0, type1, name1)                \
                     40:        struct {                                                \
                     41:                type0   name0 __attribute__(( aligned(8) ));    \
                     42:                type1   name1;                                  \
                     43:        } name0##_##name1
                     44: 
                     45: /*
                     46:  * REG_PAIR -- Macro to define names for accessing individual registers
                     47:  * of register pairs.
                     48:  *
                     49:  * Usage:
                     50:  *     arg0 is first element of pair
                     51:  *     arg1 is second element of pair
                     52:  *     arg2 is desired element of pair
                     53:  * eg:
                     54:  *     #define foo_barp        REG_PAIR(barp, afu, afu)
                     55:  */
                     56: #define        REG_PAIR(name0, name1, the_name)                        \
                     57:        name0##_##name1.the_name
                     58: 
                     59: #endif  _ARCH_M88K_REG_HELP_H_

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