Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 120 insertions, 0 deletions

diff --git a/rts/gmp/mpn/a29k/add_n.s b/rts/gmp/mpn/a29k/add_n.s
new file mode 100644
index 0000000000..e3ee6dfa60
--- /dev/null
+++ b/rts/gmp/mpn/a29k/add_n.s
@@ -0,0 +1,120 @@
+; 29000 __gmpn_add -- Add two limb vectors of the same length > 0 and store
+; sum in a third limb vector.
+
+; Copyright (C) 1992, 1994, 2000 Free Software Foundation, Inc.
+
+; This file is part of the GNU MP Library.
+
+; The GNU MP 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 MP 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 MP 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.
+
+
+; INPUT PARAMETERS
+; res_ptr	lr2
+; s1_ptr	lr3
+; s2_ptr	lr4
+; size		lr5
+
+; We use the loadm/storem instructions and operate on chunks of 8
+; limbs/per iteration, until less than 8 limbs remain.
+
+; The 29k has no addition or subtraction instructions that doesn't
+; affect carry, so we need to save and restore that as soon as we
+; adjust the pointers.  gr116 is used for this purpose.  Note that
+; gr116==0 means that carry should be set.
+
+	.sect .lit,lit
+	.text
+	.align	4
+	.global	___gmpn_add_n
+	.word	0x60000
+___gmpn_add_n:
+	srl	gr117,lr5,3
+	sub	gr118,gr117,1
+	jmpt	gr118,Ltail
+	 constn	gr116,-1		; init cy reg
+	sub	gr117,gr117,2		; count for jmpfdec
+
+; Main loop working 8 limbs/iteration.
+Loop:	mtsrim	cr,(8-1)
+	loadm	0,0,gr96,lr3
+	add	lr3,lr3,32
+	mtsrim	cr,(8-1)
+	loadm	0,0,gr104,lr4
+	add	lr4,lr4,32
+
+	subr	gr116,gr116,0		; restore carry
+	addc	gr96,gr96,gr104
+	addc	gr97,gr97,gr105
+	addc	gr98,gr98,gr106
+	addc	gr99,gr99,gr107
+	addc	gr100,gr100,gr108
+	addc	gr101,gr101,gr109
+	addc	gr102,gr102,gr110
+	addc	gr103,gr103,gr111
+	subc	gr116,gr116,gr116	; gr116 = not(cy)
+
+	mtsrim	cr,(8-1)
+	storem	0,0,gr96,lr2
+	jmpfdec	gr117,Loop
+	 add	lr2,lr2,32
+
+; Code for the last up-to-7 limbs.
+; This code might look very strange, but it's hard to write it
+; differently without major slowdown.
+
+	and	lr5,lr5,(8-1)
+Ltail:	sub	gr118,lr5,1		; count for CR
+	jmpt	gr118,Lend
+	 sub	gr117,lr5,2		; count for jmpfdec
+
+	mtsr	cr,gr118
+	loadm	0,0,gr96,lr3
+	mtsr	cr,gr118
+	loadm	0,0,gr104,lr4
+
+	subr	gr116,gr116,0		; restore carry
+
+	jmpfdec	gr117,L1
+	 addc	gr96,gr96,gr104
+	jmp	Lstore
+	 mtsr	cr,gr118
+L1:	jmpfdec	gr117,L2
+	 addc	gr97,gr97,gr105
+	jmp	Lstore
+	 mtsr	cr,gr118
+L2:	jmpfdec	gr117,L3
+	 addc	gr98,gr98,gr106
+	jmp	Lstore
+	 mtsr	cr,gr118
+L3:	jmpfdec	gr117,L4
+	 addc	gr99,gr99,gr107
+	jmp	Lstore
+	 mtsr	cr,gr118
+L4:	jmpfdec	gr117,L5
+	 addc	gr100,gr100,gr108
+	jmp	Lstore
+	 mtsr	cr,gr118
+L5:	jmpfdec	gr117,L6
+	 addc	gr101,gr101,gr109
+	jmp	Lstore
+	 mtsr	cr,gr118
+L6:	addc	gr102,gr102,gr110
+
+Lstore:	storem	0,0,gr96,lr2
+	subc	gr116,gr116,gr116	; gr116 = not(cy)
+
+Lend:	jmpi	lr0
+	 add	gr96,gr116,1