Updated from ../=mpn/gmp-1.910

7 files changed, 489 insertions, 2 deletions

diff --git a/sysdeps/m68k/add_n.S b/sysdeps/m68k/add_n.S
new file mode 100644
index 0000000000..ea7a4458ea
--- /dev/null
+++ b/sysdeps/m68k/add_n.S
@@ -0,0 +1,76 @@
+/* mc68020 __mpn_add_n -- Add two limb vectors of the same length > 0 and store
+   sum in a third limb vector.
+
+Copyright (C) 1992, 1994 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 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 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/*
+  INPUT PARAMETERS
+  res_ptr	(sp + 4)
+  s1_ptr	(sp + 8)
+  s2_ptr	(sp + 16)
+  size		(sp + 12)
+*/
+
+#include "asm-syntax.h"
+
+	TEXT
+	ALIGN
+	GLOBL	___mpn_add_n
+
+LAB(___mpn_add_n)
+/* Save used registers on the stack.  */
+	INSN2(move,l	,MEM_PREDEC(sp),d2)
+	INSN2(move,l	,MEM_PREDEC(sp),a2)
+
+/* Copy the arguments to registers.  Better use movem?  */
+	INSN2(move,l	,a2,MEM_DISP(sp,12))
+	INSN2(move,l	,a0,MEM_DISP(sp,16))
+	INSN2(move,l	,a1,MEM_DISP(sp,20))
+	INSN2(move,l	,d2,MEM_DISP(sp,24))
+
+	INSN2(eor,w	,d2,#1)
+	INSN2(lsr,l	,d2,#1)
+	bcc L1
+	INSN2(subq,l	,d2,#1)		/* clears cy as side effect */
+
+LAB(Loop)
+	INSN2(move,l	,d0,MEM_POSTINC(a0))
+	INSN2(move,l	,d1,MEM_POSTINC(a1))
+	INSN2(addx,l	,d0,d1)
+	INSN2(move,l	,MEM_POSTINC(a2),d0)
+LAB(L1)	INSN2(move,l	,d0,MEM_POSTINC(a0))
+	INSN2(move,l	,d1,MEM_POSTINC(a1))
+	INSN2(addx,l	,d0,d1)
+	INSN2(move,l	,MEM_POSTINC(a2),d0)
+
+	dbf d2,Loop			/* loop until 16 lsb of %4 == -1 */
+	INSN2(subx,l	,d0,d0)		/* d0 <= -cy; save cy as 0 or -1 in d0 */
+	INSN2(sub,l	,d2,#0x10000)
+	bcs L2
+	INSN2(add,l	,d0,d0)		/* restore cy */
+	bra Loop
+
+LAB(L2)
+	INSN1(neg,l	,d0)
+
+/* Restore used registers from stack frame.  */
+	INSN2(move,l	,a2,MEM_POSTINC(sp))
+	INSN2(move,l	,d2,MEM_POSTINC(sp))
+
+	rts
diff --git a/sysdeps/m68k/sub_n.S b/sysdeps/m68k/sub_n.S
new file mode 100644
index 0000000000..19f0ec1568
--- /dev/null
+++ b/sysdeps/m68k/sub_n.S
@@ -0,0 +1,76 @@
+/* mc68020 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+   store difference in a third limb vector.
+
+Copyright (C) 1992, 1994 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 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 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/*
+  INPUT PARAMETERS
+  res_ptr	(sp + 4)
+  s1_ptr	(sp + 8)
+  s2_ptr	(sp + 16)
+  size		(sp + 12)
+*/
+
+#include "asm-syntax.h"
+
+	TEXT
+	ALIGN
+	GLOBL	___mpn_sub_n
+
+LAB(___mpn_sub_n)
+/* Save used registers on the stack.  */
+	INSN2(move,l	,MEM_PREDEC(sp),d2)
+	INSN2(move,l	,MEM_PREDEC(sp),a2)
+
+/* Copy the arguments to registers.  Better use movem?  */
+	INSN2(move,l	,a2,MEM_DISP(sp,12))
+	INSN2(move,l	,a0,MEM_DISP(sp,16))
+	INSN2(move,l	,a1,MEM_DISP(sp,20))
+	INSN2(move,l	,d2,MEM_DISP(sp,24))
+
+	INSN2(eor,w	,d2,#1)
+	INSN2(lsr,l	,d2,#1)
+	bcc L1
+	INSN2(subq,l	,d2,#1)		/* clears cy as side effect */
+
+LAB(Loop)
+	INSN2(move,l	,d0,MEM_POSTINC(a0))
+	INSN2(move,l	,d1,MEM_POSTINC(a1))
+	INSN2(subx,l	,d0,d1)
+	INSN2(move,l	,MEM_POSTINC(a2),d0)
+LAB(L1)	INSN2(move,l	,d0,MEM_POSTINC(a0))
+	INSN2(move,l	,d1,MEM_POSTINC(a1))
+	INSN2(subx,l	,d0,d1)
+	INSN2(move,l	,MEM_POSTINC(a2),d0)
+
+	dbf d2,Loop			/* loop until 16 lsb of %4 == -1 */
+	INSN2(subx,l	,d0,d0)		/* d0 <= -cy; save cy as 0 or -1 in d0 */
+	INSN2(sub,l	,d2,#0x10000)
+	bcs L2
+	INSN2(add,l	,d0,d0)		/* restore cy */
+	bra Loop
+
+LAB(L2)
+	INSN1(neg,l	,d0)
+
+/* Restore used registers from stack frame.  */
+	INSN2(move,l	,a2,MEM_POSTINC(sp))
+	INSN2(move,l	,d2,MEM_POSTINC(sp))
+
+	rts
diff --git a/sysdeps/m88k/add_n.s b/sysdeps/m88k/add_n.s
new file mode 100644
index 0000000000..7e4ccccb90
--- /dev/null
+++ b/sysdeps/m88k/add_n.s
@@ -0,0 +1,103 @@
+; mc88100 __mpn_add -- Add two limb vectors of the same length > 0 and store
+; sum in a third limb vector.
+
+; Copyright (C) 1992, 1994 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 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 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 Library General Public
+; License for more details.
+
+; You should have received a copy of the GNU Library General Public License
+; along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+; INPUT PARAMETERS
+; res_ptr	r2
+; s1_ptr	r3
+; s2_ptr	r4
+; size		r5
+
+; This code has been optimized to run one instruction per clock, avoiding
+; load stalls and writeback contention.  As a result, the instruction
+; order is not always natural.
+
+; The speed is about 4.6 clocks/limb + 18 clocks/limb-vector on an 88100,
+; but on the 88110, it seems to run much slower, 6.6 clocks/limb.
+
+	text
+	align	 16
+	global	 ___mpn_add_n
+___mpn_add_n:
+	ld	r6,r3,0			; read first limb from s1_ptr
+	extu	r10,r5,3
+	ld	r7,r4,0			; read first limb from s2_ptr
+
+	subu.co	r5,r0,r5		; (clear carry as side effect)
+	mak	r5,r5,3<4>
+	bcnd	eq0,r5,Lzero
+
+	or	r12,r0,lo16(Lbase)
+	or.u	r12,r12,hi16(Lbase)
+	addu	r12,r12,r5		; r12 is address for entering in loop
+
+	extu	r5,r5,2			; divide by 4
+	subu	r2,r2,r5		; adjust res_ptr
+	subu	r3,r3,r5		; adjust s1_ptr
+	subu	r4,r4,r5		; adjust s2_ptr
+
+	or	r8,r6,r0
+
+	jmp.n	r12
+	 or	r9,r7,r0
+
+Loop:	addu	r3,r3,32
+	st	r8,r2,28
+	addu	r4,r4,32
+	ld	r6,r3,0
+	addu	r2,r2,32
+	ld	r7,r4,0
+Lzero:	subu	r10,r10,1		; add 0 + 8r limbs (adj loop cnt)
+Lbase:	ld	r8,r3,4
+	addu.cio r6,r6,r7
+	ld	r9,r4,4
+	st	r6,r2,0
+	ld	r6,r3,8			; add 7 + 8r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,8
+	st	r8,r2,4
+	ld	r8,r3,12		; add 6 + 8r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,12
+	st	r6,r2,8
+	ld	r6,r3,16		; add 5 + 8r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,16
+	st	r8,r2,12
+	ld	r8,r3,20		; add 4 + 8r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,20
+	st	r6,r2,16
+	ld	r6,r3,24		; add 3 + 8r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,24
+	st	r8,r2,20
+	ld	r8,r3,28		; add 2 + 8r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,28
+	st	r6,r2,24
+	bcnd.n	ne0,r10,Loop		; add 1 + 8r limbs
+	 addu.cio r8,r8,r9
+
+	st	r8,r2,28		; store most significant limb
+
+	jmp.n	 r1
+	 addu.ci r2,r0,r0		; return carry-out from most sign. limb
diff --git a/sysdeps/m88k/mul_1.s b/sysdeps/m88k/mul_1.s
new file mode 100644
index 0000000000..35c238d570
--- /dev/null
+++ b/sysdeps/m88k/mul_1.s
@@ -0,0 +1,128 @@
+; mc88100 __mpn_mul_1 -- Multiply a limb vector with a single limb and
+; store the product in a second limb vector.
+
+; Copyright (C) 1992, 1994 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 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 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 Library General Public
+; License for more details.
+
+; You should have received a copy of the GNU Library General Public License
+; along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+; INPUT PARAMETERS
+; res_ptr	r2
+; s1_ptr	r3
+; size		r4
+; s2_limb	r5
+
+; Common overhead is about 11 cycles/invocation.
+
+; The speed for S2_LIMB >= 0x10000 is approximately 21 cycles/limb.  (The
+; pipeline stalls 2 cycles due to WB contention.)
+
+; The speed for S2_LIMB < 0x10000 is approximately 16 cycles/limb.  (The
+; pipeline stalls 2 cycles due to WB contention and 1 cycle due to latency.)
+
+; To enhance speed:
+; 1. Unroll main loop 4-8 times.
+; 2. Schedule code to avoid WB contention.  It might be tempting to move the
+;    ld instruction in the loops down to save 2 cycles (less WB contention),
+;    but that looses because the ultimate value will be read from outside
+;    the allocated space.  But if we handle the ultimate multiplication in
+;    the tail, we can do this.
+; 3. Make the multiplication with less instructions.  I think the code for
+;    (S2_LIMB >= 0x10000) is not minimal.
+; With these techniques the (S2_LIMB >= 0x10000) case would run in 17 or
+; less cycles/limb; the (S2_LIMB < 0x10000) case would run in 11
+; cycles/limb.  (Assuming infinite unrolling.)
+
+	text
+	align	 16
+	global	 ___mpn_mul_1
+___mpn_mul_1:
+
+	; Make S1_PTR and RES_PTR point at the end of their blocks
+	; and negate SIZE.
+	lda	 r3,r3[r4]
+	lda	 r6,r2[r4]		; RES_PTR in r6 since r2 is retval
+	subu	 r4,r0,r4
+
+	addu.co	 r2,r0,r0		; r2 = cy = 0
+	ld	 r9,r3[r4]
+	mask	 r7,r5,0xffff		; r7 = lo(S2_LIMB)
+	extu	 r8,r5,16		; r8 = hi(S2_LIMB)
+	bcnd.n	 eq0,r8,Lsmall		; jump if (hi(S2_LIMB) == 0)
+	 subu	 r6,r6,4
+
+; General code for any value of S2_LIMB.
+
+	; Make a stack frame and save r25 and r26
+	subu	 r31,r31,16
+	st.d	 r25,r31,8
+
+	; Enter the loop in the middle
+	br.n	L1
+	addu	 r4,r4,1
+
+Loop:
+	ld	 r9,r3[r4]
+	st	 r26,r6[r4]
+; bcnd	ne0,r0,0			; bubble
+	addu	 r4,r4,1
+L1:	mul	 r26,r9,r5		; low word of product	mul_1	WB ld
+	mask	 r12,r9,0xffff		; r12 = lo(s1_limb)	mask_1
+	mul	 r11,r12,r7		; r11 =  prod_0		mul_2	WB mask_1
+	mul	 r10,r12,r8		; r10 = prod_1a		mul_3
+	extu	 r13,r9,16		; r13 = hi(s1_limb)	extu_1	WB mul_1
+	mul	 r12,r13,r7		; r12 = prod_1b		mul_4	WB extu_1
+	mul	 r25,r13,r8		; r25  = prod_2		mul_5	WB mul_2
+	extu	 r11,r11,16		; r11 = hi(prod_0)	extu_2	WB mul_3
+	addu	 r10,r10,r11		;			addu_1	WB extu_2
+; bcnd	ne0,r0,0			; bubble			WB addu_1
+	addu.co	 r10,r10,r12		;				WB mul_4
+	mask.u	 r10,r10,0xffff		; move the 16 most significant bits...
+	addu.ci	 r10,r10,r0		; ...to the low half of the word...
+	rot	 r10,r10,16		; ...and put carry in pos 16.
+	addu.co	 r26,r26,r2		; add old carry limb
+	bcnd.n	 ne0,r4,Loop
+	 addu.ci r2,r25,r10		; compute new carry limb
+
+	st	 r26,r6[r4]
+	ld.d	 r25,r31,8
+	jmp.n	 r1
+	 addu	 r31,r31,16
+
+; Fast code for S2_LIMB < 0x10000
+Lsmall:
+	; Enter the loop in the middle
+	br.n	SL1
+	addu	 r4,r4,1
+
+SLoop:
+	ld	 r9,r3[r4]		;
+	st	 r8,r6[r4]		;
+	addu	 r4,r4,1		;
+SL1:	mul	 r8,r9,r5		; low word of product
+	mask	 r12,r9,0xffff		; r12 = lo(s1_limb)
+	extu	 r13,r9,16		; r13 = hi(s1_limb)
+	mul	 r11,r12,r7		; r11 =  prod_0
+	mul	 r12,r13,r7		; r12 = prod_1b
+	addu.cio r8,r8,r2		; add old carry limb
+	extu	 r10,r11,16		; r11 = hi(prod_0)
+	addu	 r10,r10,r12		;
+	bcnd.n	 ne0,r4,SLoop
+	extu	 r2,r10,16		; r2 = new carry limb
+
+	jmp.n	 r1
+	st	 r8,r6[r4]
diff --git a/sysdeps/m88k/sub_n.s b/sysdeps/m88k/sub_n.s
new file mode 100644
index 0000000000..3963cd5479
--- /dev/null
+++ b/sysdeps/m88k/sub_n.s
@@ -0,0 +1,104 @@
+; mc88100 __mpn_sub -- Subtract two limb vectors of the same length > 0 and
+; store difference in a third limb vector.
+
+; Copyright (C) 1992, 1994 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 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 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 Library General Public
+; License for more details.
+
+; You should have received a copy of the GNU Library General Public License
+; along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+; INPUT PARAMETERS
+; res_ptr	r2
+; s1_ptr	r3
+; s2_ptr	r4
+; size		r5
+
+; This code has been optimized to run one instruction per clock, avoiding
+; load stalls and writeback contention.  As a result, the instruction
+; order is not always natural.
+
+; The speed is about 4.6 clocks/limb + 18 clocks/limb-vector on an 88100,
+; but on the 88110, it seems to run much slower, 6.6 clocks/limb.
+
+	text
+	align	 16
+	global	 ___mpn_sub_n
+___mpn_sub_n:
+	ld	r6,r3,0			; read first limb from s1_ptr
+	extu	r10,r5,3
+	ld	r7,r4,0			; read first limb from s2_ptr
+
+	subu.co	r5,r0,r5		; (clear carry as side effect)
+	mak	r5,r5,3<4>
+	bcnd	eq0,r5,Lzero
+
+	or	r12,r0,lo16(Lbase)
+	or.u	r12,r12,hi16(Lbase)
+	addu	r12,r12,r5		; r12 is address for entering in loop
+
+	extu	r5,r5,2			; divide by 4
+	subu	r2,r2,r5		; adjust res_ptr
+	subu	r3,r3,r5		; adjust s1_ptr
+	subu	r4,r4,r5		; adjust s2_ptr
+
+	or	r8,r6,r0
+
+	jmp.n	r12
+	 or	r9,r7,r0
+
+Loop:	addu	r3,r3,32
+	st	r8,r2,28
+	addu	r4,r4,32
+	ld	r6,r3,0
+	addu	r2,r2,32
+	ld	r7,r4,0
+Lzero:	subu	r10,r10,1		; subtract 0 + 8r limbs (adj loop cnt)
+Lbase:	ld	r8,r3,4
+	subu.cio r6,r6,r7
+	ld	r9,r4,4
+	st	r6,r2,0
+	ld	r6,r3,8			; subtract 7 + 8r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,8
+	st	r8,r2,4
+	ld	r8,r3,12		; subtract 6 + 8r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,12
+	st	r6,r2,8
+	ld	r6,r3,16		; subtract 5 + 8r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,16
+	st	r8,r2,12
+	ld	r8,r3,20		; subtract 4 + 8r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,20
+	st	r6,r2,16
+	ld	r6,r3,24		; subtract 3 + 8r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,24
+	st	r8,r2,20
+	ld	r8,r3,28		; subtract 2 + 8r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,28
+	st	r6,r2,24
+	bcnd.n	ne0,r10,Loop		; subtract 1 + 8r limbs
+	 subu.cio r8,r8,r9
+
+	st	r8,r2,28		; store most significant limb
+
+	addu.ci r2,r0,r0		; return carry-out from most sign. limb
+	jmp.n	 r1
+	 xor	r2,r2,1
diff --git a/sysdeps/rs6000/add_n.s b/sysdeps/rs6000/add_n.s
index 34ad9e1d2d..7090cf1b00 100644
--- a/sysdeps/rs6000/add_n.s
+++ b/sysdeps/rs6000/add_n.s
@@ -45,7 +45,7 @@ __mpn_add_n:
 	bdz	Lend		# If done, skip loop
 Loop:	lu	8,4(4)		# load s1 limb and update s1_ptr
 	lu	0,4(5)		# load s2 limb and update s2_ptr
-	stu	7,4(3)		# store previous limb in load latecny slot
+	stu	7,4(3)		# store previous limb in load latency slot
 	ae	7,0,8		# add new limbs with cy, set cy
 	bdn	Loop		# decrement CTR and loop back
 Lend:	st	7,4(3)		# store ultimate result limb
diff --git a/sysdeps/rs6000/sub_n.s b/sysdeps/rs6000/sub_n.s
index 402fdcefc4..40fe7d68bd 100644
--- a/sysdeps/rs6000/sub_n.s
+++ b/sysdeps/rs6000/sub_n.s
@@ -46,7 +46,7 @@ __mpn_sub_n:
 	bdz	Lend		# If done, skip loop
 Loop:	lu	8,4(4)		# load s1 limb and update s1_ptr
 	lu	0,4(5)		# load s2 limb and update s2_ptr
-	stu	7,4(3)		# store previous limb in load latecny slot
+	stu	7,4(3)		# store previous limb in load latency slot
 	sfe	7,0,8		# add new limbs with cy, set cy
 	bdn	Loop		# decrement CTR and loop back
 Lend:	st	7,4(3)		# store ultimate result limb