Interdata_v6/usr/sys/reg.h

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/*
 * Location of the users' stored
 * registers relative to R0.
 * Usage is u.u_ar0[XX].
 */
#define	R0	0
#define	R1	1
#define	R2	2
#define	R3	3
#define	R4	4
#define	R5	5
#define	R6	6
#define	R7	7
#define	R8	(-10)
#define	R9	(-9)
#define	R10	(-8)
#define	R11	(-7)
#define	R12	(-6)
#define	R13	(-5)
#define	R14	(-4)
#define	R15	8
#define	RF	8
#define	RSP	7
#define	RPS	9
#define	RPC	10