home *** CD-ROM | disk | FTP | other *** search
- /* Copyright (c) 1991 NeXT Computer, Inc. All rights reserved.
- *
- * File: architecture/m88k/reg_help.h
- * Author: Mike DeMoney, NeXT Computer, Inc.
- *
- * This header file defines cpp macros useful for defining
- * machine register and doing machine-level operations.
- *
- * HISTORY
- * 23-Jan-91 Mike DeMoney (mike@next.com)
- * Created.
- */
-
- #ifndef _ARCH_M88K_REG_HELP_H_
- #define _ARCH_M88K_REG_HELP_H_
-
- #import <architecture/nrw/reg_help.h>
-
- /* Stack pointer must always be a multiple of 16 */
- #define STACK_INCR 16
- #define ROUND_FRAME(x) ((((unsigned)(x)) + STACK_INCR - 1) & ~(STACK_INCR-1))
-
- /*
- * REG_PAIR_DEF -- define a register pair
- * Register pairs are appropriately aligned to allow access via
- * ld.d and st.d.
- *
- * Usage:
- * struct foo {
- * REG_PAIR_DEF(
- * bar_t *, barp,
- * afu_t, afu
- * );
- * };
- *
- * Access to individual entries of the pair is via the REG_PAIR
- * macro (below).
- */
- #define REG_PAIR_DEF(type0, name0, type1, name1) \
- struct { \
- type0 name0 __attribute__(( aligned(8) )); \
- type1 name1; \
- } name0##_##name1
-
- /*
- * REG_PAIR -- Macro to define names for accessing individual registers
- * of register pairs.
- *
- * Usage:
- * arg0 is first element of pair
- * arg1 is second element of pair
- * arg2 is desired element of pair
- * eg:
- * #define foo_barp REG_PAIR(barp, afu, afu)
- */
- #define REG_PAIR(name0, name1, the_name) \
- name0##_##name1.the_name
-
- #endif _ARCH_M88K_REG_HELP_H_
-