/* Bounded-pointer definitions for PowerPC assembler.   Copyright (C) 2000 Free Software Foundation, Inc.   Contributed by Greg McGary <greg@mcgary.org>   This file is part of the GNU C Library.  Its master source is NOT part of   the C library, however.  The master source lives in the GNU MP Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#if __BOUNDED_POINTERS__/* Byte offsets of BP components.  */# define oVALUE	0# define oLOW	4# define oHIGH	8/* Don't check bounds, just convert the BP register to its simple   pointer value.  */# define DISCARD_BOUNDS(rBP)			\	lwz	rBP, oVALUE(rBP)/* Check low bound, with the side effect that the BP register is converted   its simple pointer value.  Move the high bound into a register for   later use.  */# define CHECK_BOUNDS_LOW(rBP, rLOW, rHIGH)	\	lwz	rHIGH, oHIGH(rBP);		\	lwz	rLOW, oLOW(rBP);		\	lwz	rBP, oVALUE(rBP);		\	twllt	rBP, rLOW/* Check the high bound, which is in a register, using the given   conditional trap instruction.  */# define CHECK_BOUNDS_HIGH(rVALUE, rHIGH, TWLcc) \	TWLcc	rVALUE, rHIGH/* Check the high bound, which is stored at the return-value's high   bound slot, using the given conditional trap instruction.  */# define CHECK_BOUNDS_HIGH_RTN(rVALUE, rHIGH, TWLcc)	\	lwz	rHIGH, oHIGH(rRTN);			\	TWLcc	rVALUE, rHIGH/* Check both bounds, with the side effect that the BP register is   converted to its simple pointer value.  */# define CHECK_BOUNDS_BOTH(rBP, rLOW, rHIGH)	\	CHECK_BOUNDS_LOW(rBP, rLOW, rHIGH);	\	twlge	rBP, rHIGH/* Check bounds on a memory region of given length, with the side   effect that the BP register is converted to its simple pointer   value.  */# define CHECK_BOUNDS_BOTH_WIDE(rBP, rLOW, rHIGH, rLENGTH)	\	CHECK_BOUNDS_LOW (rBP, rLOW, rHIGH);			\	sub	rHIGH, rHIGH, rLENGTH;				\	twlgt	rBP, rHIGH# define CHECK_BOUNDS_BOTH_WIDE_LIT(rBP, rLOW, rHIGH, LENGTH)	\	CHECK_BOUNDS_LOW (rBP, rLOW, rHIGH);			\	subi	rHIGH, rHIGH, LENGTH;				\	twlgt	rBP, rHIGH/* Store a pointer value register into the return-value's pointer   value slot.  */# define STORE_RETURN_VALUE(rVALUE)		\	stw	rVALUE, oVALUE(rRTN)/* Store a low and high bounds into the return-value's pointer bounds   slots.  */# define STORE_RETURN_BOUNDS(rLOW, rHIGH)	\	stw	rLOW, oLOW(rRTN);		\	stw	rHIGH, oHIGH(rRTN)/* Stuff zero value/low/high into the BP addressed by rRTN.  */# define RETURN_NULL_BOUNDED_POINTER		\	li	r4, 0;				\	STORE_RETURN_VALUE (r4);		\	STORE_RETURN_BOUNDS (r4, r4)#else# define DISCARD_BOUNDS(rBP)# define CHECK_BOUNDS_LOW(rBP, rLOW, rHIGH)# define CHECK_BOUNDS_HIGH(rVALUE, rHIGH, TWLcc)# define CHECK_BOUNDS_HIGH_RTN(rVALUE, rHIGH, TWLcc)# define CHECK_BOUNDS_BOTH(rBP, rLOW, rHIGH)# define CHECK_BOUNDS_BOTH_WIDE(rBP, rLOW, rHIGH, rLENGTH)# define CHECK_BOUNDS_BOTH_WIDE_LIT(rBP, rLOW, rHIGH, LENGTH)# define STORE_RETURN_VALUE(rVALUE)# define STORE_RETURN_BOUNDS(rLOW, rHIGH)# define RETURN_NULL_BOUNDED_POINTER li rRTN, 0#endif