Update.

2000-06-09  David Mosberger-Tang  <davidm@hpl.hp.com>

	* sysdeps/unix/sysv/linux/ia64/__longjmp.S: new file
	* sysdeps/unix/sysv/linux/ia64/bsd-_setjmp.S: new file
	* sysdeps/unix/sysv/linux/ia64/bsd-setjmp.S: new file
	* sysdeps/unix/sysv/linux/ia64/setjmp.S: new file
	* sysdeps/unix/sysv/linux/ia64/bits/setjmp.h: new file

5 files changed, 396 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/ia64/__longjmp.S b/sysdeps/unix/sysv/linux/ia64/__longjmp.S
new file mode 100644
index 0000000000..3f177eb227
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/__longjmp.S
@@ -0,0 +1,172 @@
+/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+   Note that __sigsetjmp() did NOT flush the register stack.  Instead,
+   we do it here since __longjmp() is usually much less frequently
+   invoked than __sigsetjmp(). The only difficulty is that __sigsetjmp()
+   didn't (and wouldn't be able to) save ar.rnat either.  This is a problem
+   because if we're not careful, we could end up loading random NaT bits.
+   There are two cases:
+
+	(i)  ar.bsp < ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+		ar.rnat contains the desired bits---preserve ar.rnat
+		across loadrs and write to ar.bspstore
+
+	(ii) ar.bsp >= ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+		The desired ar.rnat is stored in
+		ia64_rse_rnat_addr(jmpbuf.ar_bsp).  Load those
+		bits into ar.rnat after setting ar.bspstore. */
+
+#include <sysdep.h>
+#include <features.h>
+
+#	define	pPos	p6	/* is rotate count positive? */
+#	define	pNeg	p7	/* is rotate count negative? */
+
+
+	.psr abi64
+	.psr lsb
+	.lsb
+
+	/* __longjmp(__jmp_buf buf, int val) */
+	.text
+	.align 32
+	.global __longjmp
+	.proc __longjmp
+__longjmp:
+	alloc r8=ar.pfs,2,1,0,0
+	mov r27=ar.rsc
+	add r2=0x98,in0		// r2 <- &jmpbuf.orig_jmp_buf_addr
+	;;
+	ld8 r8=[r2],-16		// r8 <- orig_jmp_buf_addr
+	mov r10=ar.bsp
+	and r11=~0x3,r27	// clear ar.rsc.mode
+	;;
+	flushrs			// flush dirty regs to backing store (must be first in insn grp)
+	ld8 r23=[r2],8		// r23 <- jmpbuf.ar_bsp
+	sub r8=r8,in0		// r8 <- &orig_jmpbuf - &jmpbuf
+	;;
+	ld8 r25=[r2]		// r25 <- jmpbuf.ar_unat
+	shr r8=r8,3		// r8 <- (&orig_jmpbuf - &jmpbuf)/8
+	;;
+	and r8=0x3f,r8
+	;;
+	cmp.lt pNeg,pPos=r8,r0
+	dep r11=r0,r11,16,14	// clear ar.rsc.loadrs
+	mov r2=in0
+	;;
+(pPos)	mov r16=r8
+(pNeg)	add r16=64,r8
+(pPos)	sub r17=64,r8
+(pNeg)	sub r17=r0,r8
+	;;
+	mov ar.rsc=r11		// put RSE in enforced lazy mode
+	shr.u r8=r25,r16
+	add r3=8,in0		// r3 <- &jmpbuf.r1
+	shl r9=r25,r17
+	;;
+	or r25=r8,r9
+	;;
+	mov r26=ar.rnat
+	mov ar.unat=r25		// setup ar.unat (NaT bits for r1, r4-r7, and r12)
+	;;
+	ld8.fill.nta sp=[r2],16	// r12 (sp)
+	ld8.fill.nta gp=[r3],16		// r1 (gp)
+	dep r11=-1,r23,3,6	// r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+	;;
+	ld8.nta r16=[r2],16		// caller's unat
+	ld8.nta r17=[r3],16		// fpsr
+	;;
+	ld8.fill.nta r4=[r2],16	// r4
+	ld8.fill.nta r5=[r3],16		// r5 (gp)
+	cmp.geu p8,p0=r10,r11	// p8 <- (ar.bsp >= jmpbuf.ar_bsp)
+	;;
+	ld8.fill.nta r6=[r2],16	// r6
+	ld8.fill.nta r7=[r3],16		// r7
+	;;
+	mov ar.unat=r16			// restore caller's unat
+	mov ar.fpsr=r17			// restore fpsr
+	;;
+	ld8.nta r16=[r2],16		// b0
+	ld8.nta r17=[r3],16		// b1
+	;;
+(p8)	ld8 r26=[r11]		// r26 <- *ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+	mov ar.bspstore=r23	// restore ar.bspstore
+	;;
+	ld8.nta r18=[r2],16		// b2
+	ld8.nta r19=[r3],16		// b3
+	;;
+	ld8.nta r20=[r2],16		// b4
+	ld8.nta r21=[r3],16		// b5
+	;;
+	ld8.nta r11=[r2],16		// ar.pfs
+	ld8.nta r22=[r3],56		// ar.lc
+	;;
+	loadrs			// invalidate stacked regs (must be first in insn group)
+	ld8.nta r24=[r2],32		// pr
+	mov b0=r16
+	;;
+	ldf.fill.nta f2=[r2],32
+	ldf.fill.nta f3=[r3],32
+	mov b1=r17
+	;;
+	ldf.fill.nta f4=[r2],32
+	ldf.fill.nta f5=[r3],32
+	mov b2=r18
+	;;
+	ldf.fill.nta f16=[r2],32
+	ldf.fill.nta f17=[r3],32
+	mov b3=r19
+	;;
+	ldf.fill.nta f18=[r2],32
+	ldf.fill.nta f19=[r3],32
+	mov b4=r20
+	;;
+	ldf.fill.nta f20=[r2],32
+	ldf.fill.nta f21=[r3],32
+	mov b5=r21
+	;;
+	ldf.fill.nta f22=[r2],32
+	ldf.fill.nta f23=[r3],32
+	mov ar.lc=r22
+	;;
+	ldf.fill.nta f24=[r2],32
+	ldf.fill.nta f25=[r3],32
+	cmp.eq p8,p9=0,in1
+	;;
+	ldf.fill.nta f26=[r2],32
+	ldf.fill.nta f27=[r3],32
+	mov ar.pfs=r11
+	;;
+	ldf.fill.nta f28=[r2],32
+	ldf.fill.nta f29=[r3],32
+	;;
+	ldf.fill.nta f30=[r2]
+	ldf.fill.nta f31=[r3]
+(p8)	mov r8=1
+
+	mov ar.rnat=r26		// restore ar.rnat
+	;;
+	mov ar.rsc=r27		// restore ar.rsc
+(p9)	mov r8=in1
+
+	invala			// virt. -> phys. regnum mapping may change
+	mov pr=r24,-1
+	ret
+	.endp __longjmp
+
diff --git a/sysdeps/unix/sysv/linux/ia64/bits/setjmp.h b/sysdeps/unix/sysv/linux/ia64/bits/setjmp.h
new file mode 100644
index 0000000000..9059f4b2b3
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/bits/setjmp.h
@@ -0,0 +1,34 @@
+/* Define the machine-dependent type `jmp_buf'.  Linux/IA-64 version.
+   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _SETJMP_H
+# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
+#endif
+
+/* User code must not depend on the internal representation of jmp_buf. */
+
+#define _JBLEN	70
+
+/* the __jmp_buf element type should be __float80 per ABI... */
+typedef long __jmp_buf[_JBLEN] __attribute__ ((aligned (16))); /* guarantees 128-bit alignment! */
+
+/* Test if longjmp to JMPBUF would unwind the frame containing a local
+   variable at ADDRESS.  */
+#define _JMPBUF_UNWINDS(_jmpbuf, _address)		\
+     ((void *)(_address) < (void *)(((long *)_jmpbuf)[0]))
diff --git a/sysdeps/unix/sysv/linux/ia64/bsd-_setjmp.S b/sysdeps/unix/sysv/linux/ia64/bsd-_setjmp.S
new file mode 100644
index 0000000000..4e6a2da560
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/bsd-_setjmp.S
@@ -0,0 +1 @@
+/* _setjmp is in setjmp.S  */
diff --git a/sysdeps/unix/sysv/linux/ia64/bsd-setjmp.S b/sysdeps/unix/sysv/linux/ia64/bsd-setjmp.S
new file mode 100644
index 0000000000..1da848d2f1
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/bsd-setjmp.S
@@ -0,0 +1 @@
+/* setjmp is in setjmp.S  */
diff --git a/sysdeps/unix/sysv/linux/ia64/setjmp.S b/sysdeps/unix/sysv/linux/ia64/setjmp.S
new file mode 100644
index 0000000000..e5bf667d45
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/setjmp.S
@@ -0,0 +1,188 @@
+/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+   The layout of the jmp_buf is as follows.  This is subject to change
+   and user-code should never depend on the particular layout of
+   jmp_buf!
+  
+
+  	offset:	description:
+	-------	------------
+  	0x000	stack pointer (r12)	; unchangeable (see _JMPBUF_UNWINDS)
+  	0x008	r1 (gp)
+	0x010	caller's unat
+	0x018	fpsr
+  	0x020	r4
+  	0x028	r5
+  	0x030	r6
+  	0x038	r7
+  	0x040	rp (b0)
+  	0x048	b1
+  	0x050	b2
+  	0x058	b3
+  	0x060	b4
+  	0x068	b5
+  	0x070	ar.pfs
+  	0x078	ar.lc
+  	0x080	pr
+  	0x088	ar.bsp			; unchangeable (see __longjmp.S)
+  	0x090	ar.unat
+	0x098	&__jmp_buf	; address of the jmpbuf (needed to locate NaT bits in unat)
+	0x0a0	 f2
+	0x0b0	 f3
+	0x0c0	 f4
+	0x0d0	 f5
+	0x0e0	f16
+  	0x0f0	f17
+  	0x100	f18
+  	0x110	f19
+  	0x120	f20
+  	0x130	f21
+  	0x130	f22
+  	0x140	f23
+  	0x150	f24
+  	0x160	f25
+  	0x170	f26
+  	0x180	f27
+  	0x190	f28
+  	0x1a0	f29
+  	0x1b0	f30
+  	0x1c0	f31 */
+
+#include <sysdep.h>
+#include <features.h>
+
+	.text
+	.psr abi64
+	.psr lsb
+	.lsb
+
+	/* The following two entry points are the traditional entry points: */
+
+	.global setjmp
+	.proc setjmp
+setjmp:	alloc r8=ar.pfs,2,0,0,0
+	mov in1=1
+	br.cond.sptk.many __sigsetjmp
+	.endp setjmp
+
+	.global __setjmp
+	.proc __setjmp
+__setjmp:
+	alloc r8=ar.pfs,2,0,0,0
+	mov in1=0
+	br.cond.sptk.many __sigsetjmp
+	.endp __setjmp
+
+	/* __sigsetjmp(__jmp_buf buf, int savemask) */
+	.align 32
+	.global __sigsetjmp
+	.proc __sigsetjmp
+__sigsetjmp:
+	alloc loc0=ar.pfs,2,2,2,0
+	mov r16=ar.unat
+	;;
+	mov r17=ar.fpsr
+	mov r2=in0
+	add r3=8,in0
+	;;
+	st8.spill.nta [r2]=sp,16	// r12 (sp)
+	st8.spill.nta [r3]=gp,16	// r1 (gp)
+	;;
+	st8.nta [r2]=r16,16		// save caller's unat
+	st8.nta [r3]=r17,16		// save fpsr
+	add r8=0xa0,in0
+	;;
+	st8.spill.nta [r2]=r4,16	// r4
+	st8.spill.nta [r3]=r5,16	// r5
+	add r9=0xb0,in0
+	;;
+	stf.spill.nta [r8]=f2,32
+	stf.spill.nta [r9]=f3,32
+	mov loc1=rp
+	;;
+	stf.spill.nta [r8]=f4,32
+	stf.spill.nta [r9]=f5,32
+	mov r17=b1
+	;;
+	stf.spill.nta [r8]=f16,32
+	stf.spill.nta [r9]=f17,32
+	mov r18=b2
+	;;
+	stf.spill.nta [r8]=f18,32
+	stf.spill.nta [r9]=f19,32
+	mov r19=b3
+	;;
+	stf.spill.nta [r8]=f20,32
+	stf.spill.nta [r9]=f21,32
+	mov r20=b4
+	;;
+	stf.spill.nta [r8]=f22,32
+	stf.spill.nta [r9]=f23,32
+	mov r21=b5
+	;;
+	stf.spill.nta [r8]=f24,32
+	stf.spill.nta [r9]=f25,32
+	mov r22=ar.lc
+	;;
+	stf.spill.nta [r8]=f26,32
+	stf.spill.nta [r9]=f27,32
+	mov r24=pr
+	;;
+	stf.spill.nta [r8]=f28,32
+	stf.spill.nta [r9]=f29,32
+	;;
+	stf.spill.nta [r8]=f30
+	stf.spill.nta [r9]=f31
+
+	st8.spill.nta [r2]=r6,16	// r6
+	st8.spill.nta [r3]=r7,16	// r7
+	cmp.ne p8,p0=0,in1
+	;;
+	mov r23=ar.bsp
+	mov r25=ar.unat
+	mov out0=in0
+	mov out1=in1
+
+	st8.nta [r2]=loc1,16		// b0
+	st8.nta [r3]=r17,16		// b1
+	;;
+	st8.nta [r2]=r18,16		// b2
+	st8.nta [r3]=r19,16		// b3
+	;;
+	st8.nta [r2]=r20,16		// b4
+	st8.nta [r3]=r21,16		// b5
+	;;
+	st8.nta [r2]=loc0,16		// ar.pfs
+	st8.nta [r3]=r22,16		// ar.lc
+	;;
+	st8.nta [r2]=r24,16		// pr
+	st8.nta [r3]=r23,16		// ar.bsp
+	;;
+	st8.nta [r2]=r25		// ar.unat
+	st8.nta [r3]=in0		// &__jmp_buf
+(p8)	br.call.dpnt.few rp=__sigjmp_save
+.ret0:					// force a new bundle ::q
+	mov r8=0
+	mov rp=loc1
+	mov ar.pfs=loc0
+	ret
+	.endp __sigsetjmp
+
+weak_alias(__setjmp, _setjmp)
+weak_extern(setjmp)