* sysdeps/alpha/Makefile <gnulib> (sysdep_routines): Merge divrem variable, add unsigned variants. * sysdeps/alpha/divrem.h: Remove file. * sysdeps/alpha/div_libc.h: New file. * sysdeps/alpha/divl.S: Rewrite from scratch. * sysdeps/alpha/reml.S: Likewise. * sysdeps/alpha/divq.S: Likewise. * sysdeps/alpha/remq.S: Likewise. * sysdeps/alpha/divlu.S: New file. * sysdeps/alpha/remlu.S: New file. * sysdeps/alpha/divqu.S: New file. * sysdeps/alpha/remqu.S: New file.

2004-03-26  Richard Henderson  <rth@redhat.com>

	* sysdeps/alpha/Makefile <gnulib> (sysdep_routines): Merge divrem
	variable, add unsigned variants.
	* sysdeps/alpha/divrem.h: Remove file.
	* sysdeps/alpha/div_libc.h: New file.
	* sysdeps/alpha/divl.S: Rewrite from scratch.
	* sysdeps/alpha/reml.S: Likewise.
	* sysdeps/alpha/divq.S: Likewise.
	* sysdeps/alpha/remq.S: Likewise.
	* sysdeps/alpha/divlu.S: New file.
	* sysdeps/alpha/remlu.S: New file.
	* sysdeps/alpha/divqu.S: New file.
	* sysdeps/alpha/remqu.S: New file.

1 files changed, 113 insertions, 0 deletions

diff --git a/sysdeps/alpha/div_libc.h b/sysdeps/alpha/div_libc.h
new file mode 100644
index 0000000000..98566435ce
--- /dev/null
+++ b/sysdeps/alpha/div_libc.h
@@ -0,0 +1,113 @@
+/* Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C 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.  */
+
+/* Common bits for implementing software divide.  */
+
+#include <sysdep.h>
+#ifdef __linux__
+# include <asm/gentrap.h>
+# include <asm/pal.h>
+#else
+# include <machine/pal.h>
+#endif
+
+/* These are not normal C functions.  Argument registers are t10 and t11;
+   the result goes in t12; the return address is in t9.  Only t12 and AT
+   may be clobbered.  */
+#define X	t10
+#define Y	t11
+#define RV	t12
+#define RA	t9
+
+/* None of these functions should use implicit anything.  */
+	.set	nomacro
+	.set	noat
+
+/* Code fragment to invoke _mcount for profiling.  This should be invoked
+   directly after allocation of the stack frame.  */
+.macro CALL_MCOUNT
+#ifdef PROF
+	stq	ra, 0(sp)
+	stq	pv, 8(sp)
+	stq	gp, 16(sp)
+	cfi_rel_offset (ra, 0)
+	cfi_rel_offset (pv, 8)
+	cfi_rel_offset (gp, 16)
+	br	AT, 1f
+	.set	macro
+1:	ldgp	gp, 0(AT)
+	mov	RA, ra
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.set	nomacro
+	ldq	ra, 0(sp)
+	ldq	pv, 8(sp)
+	ldq	gp, 16(sp)
+	cfi_restore (ra)
+	cfi_restore (pv)
+	cfi_restore (gp)
+	/* Realign subsequent code with what we'd have without this
+	   macro at all.  This means aligned with one arithmetic insn
+	   used within the bundle.  */
+	.align	4
+	nop
+#endif
+.endm
+
+/* In order to make the below work, all top-level divide routines must
+   use the same frame size.  */
+#define FRAME	48
+
+/* Code fragment to generate an integer divide-by-zero fault.  When
+   building libc.so, we arrange for there to be one copy of this code
+   placed late in the dso, such that all branches are forward.  When
+   building libc.a, we use multiple copies to avoid having an out of
+   range branch.  Users should jump to DIVBYZERO.  */
+
+.macro DO_DIVBYZERO
+#ifdef PIC
+#define DIVBYZERO	__divbyzero
+	.section .gnu.linkonce.t.divbyzero, "ax", @progbits
+	.globl	__divbyzero
+	.type	__divbyzero, @function
+	.usepv	__divbyzero, no
+	.hidden	__divbyzero
+#else
+#define DIVBYZERO	$divbyzero
+#endif
+
+	.align	4
+DIVBYZERO:
+	cfi_startproc
+	cfi_return_column (RA)
+	cfi_def_cfa_offset (FRAME)
+
+	mov	a0, RV
+	unop
+	lda	a0, GEN_INTDIV
+	call_pal PAL_gentrap
+
+	mov	RV, a0
+	clr	RV
+	lda	sp, FRAME(sp)
+	cfi_def_cfa_offset (0)
+	ret	$31, (RA), 1
+
+	cfi_endproc
+	.size	DIVBYZERO, .-DIVBYZERO
+.endm