about summary refs log tree commit diff
path: root/sysdeps/m88k
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/m88k')
-rw-r--r--sysdeps/m88k/ffs.c42
-rw-r--r--sysdeps/m88k/m88100/add_n.S133
-rw-r--r--sysdeps/m88k/m88100/mul_1.S127
-rw-r--r--sysdeps/m88k/m88100/sub_n.S134
-rw-r--r--sysdeps/m88k/m88110/mul_1.S80
5 files changed, 516 insertions, 0 deletions
diff --git a/sysdeps/m88k/ffs.c b/sysdeps/m88k/ffs.c
new file mode 100644
index 0000000000..effca9a0d2
--- /dev/null
+++ b/sysdeps/m88k/ffs.c
@@ -0,0 +1,42 @@
+/* ffs -- find first set bit in a word, counted from least significant end.
+   For Motorola 88000.
+   Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+   Contributed by Torbjorn Granlund (tege@sics.se).
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <bstring.h>
+
+#undef	ffs
+
+#ifdef	__GNUC__
+
+int
+DEFUN(ffs, (x), int x)
+{
+  int cnt;
+
+  if (x == 0)
+    return 0;
+
+  asm ("ff1 %0,%1" : "=r" (cnt) : "r" (x & -x));
+  return cnt + 1;
+}
+
+#else
+#include <sysdeps/generic/ffs.c>
+#endif
diff --git a/sysdeps/m88k/m88100/add_n.S b/sysdeps/m88k/m88100/add_n.S
new file mode 100644
index 0000000000..2107eb55cb
--- /dev/null
+++ b/sysdeps/m88k/m88100/add_n.S
@@ -0,0 +1,133 @@
+; 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 General Public License as published by
+; the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+; You should have received a copy of the GNU General Public License
+; along with the GNU MP Library; see the file COPYING.  If not, write to
+; the Free Software Foundation, 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 approximately 4.3 clocks/limb + 18 clocks/limb-vector.
+
+#include "sysdep.h"
+
+ENTRY (__mpn_add_n)
+	ld	r6,r3,0			; read first limb from s1_ptr
+	extu	r10,r5,4
+	ld	r7,r4,0			; read first limb from s2_ptr
+
+	subu.co	r5,r0,r5		; (clear carry as side effect)
+	mak	r5,r5,4<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,r3,64
+	st	r8,r2,60
+	addu	r4,r4,64
+	ld	r6,r3,0
+	addu	r2,r2,64
+	ld	r7,r4,0
+Lzero:	subu	r10,r10,1	; add 0 + 16r limbs (adjust loop counter)
+Lbase:	ld	r8,r3,4
+	addu.cio r6,r6,r7
+	ld	r9,r4,4
+	st	r6,r2,0
+	ld	r6,r3,8		; add 15 + 16r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,8
+	st	r8,r2,4
+	ld	r8,r3,12	; add 14 + 16r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,12
+	st	r6,r2,8
+	ld	r6,r3,16	; add 13 + 16r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,16
+	st	r8,r2,12
+	ld	r8,r3,20	; add 12 + 16r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,20
+	st	r6,r2,16
+	ld	r6,r3,24	; add 11 + 16r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,24
+	st	r8,r2,20
+	ld	r8,r3,28	; add 10 + 16r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,28
+	st	r6,r2,24
+	ld	r6,r3,32	; add 9 + 16r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,32
+	st	r8,r2,28
+	ld	r8,r3,36	; add 8 + 16r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,36
+	st	r6,r2,32
+	ld	r6,r3,40	; add 7 + 16r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,40
+	st	r8,r2,36
+	ld	r8,r3,44	; add 6 + 16r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,44
+	st	r6,r2,40
+	ld	r6,r3,48	; add 5 + 16r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,48
+	st	r8,r2,44
+	ld	r8,r3,52	; add 4 + 16r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,52
+	st	r6,r2,48
+	ld	r6,r3,56	; add 3 + 16r limbs
+	addu.cio r8,r8,r9
+	ld	r7,r4,56
+	st	r8,r2,52
+	ld	r8,r3,60	; add 2 + 16r limbs
+	addu.cio r6,r6,r7
+	ld	r9,r4,60
+	st	r6,r2,56
+	bcnd.n	ne0,r10,Loop	; add 1 + 16r limbs
+	 addu.cio r8,r8,r9
+
+	st	r8,r2,60		; store most significant limb
+
+	jmp.n	 r1
+	 addu.ci r2,r0,r0		; return carry-out from most sign. limb
diff --git a/sysdeps/m88k/m88100/mul_1.S b/sysdeps/m88k/m88100/mul_1.S
new file mode 100644
index 0000000000..503897b298
--- /dev/null
+++ b/sysdeps/m88k/m88100/mul_1.S
@@ -0,0 +1,127 @@
+; 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 General Public License as published by
+; the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+; You should have received a copy of the GNU General Public License
+; along with the GNU MP Library; see the file COPYING.  If not, write to
+; the Free Software Foundation, 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.)
+
+#include "sysdep.h"
+
+ENTRY (__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/m88100/sub_n.S b/sysdeps/m88k/m88100/sub_n.S
new file mode 100644
index 0000000000..927ece4f15
--- /dev/null
+++ b/sysdeps/m88k/m88100/sub_n.S
@@ -0,0 +1,134 @@
+; 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 General Public License as published by
+; the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+; You should have received a copy of the GNU General Public License
+; along with the GNU MP Library; see the file COPYING.  If not, write to
+; the Free Software Foundation, 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 approximately 4.3 clocks/limb + 18 clocks/limb-vector.
+
+#include "sysdep.h"
+
+ENTRY (__mpn_sub_n)
+	ld	r6,r3,0			; read first limb from s1_ptr
+	extu	r10,r5,4
+	ld	r7,r4,0			; read first limb from s2_ptr
+
+	subu.co	r5,r0,r5		; (clear carry as side effect)
+	mak	r5,r5,4<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,r3,64
+	st	r8,r2,60
+	addu	r4,r4,64
+	ld	r6,r3,0
+	addu	r2,r2,64
+	ld	r7,r4,0
+Lzero:	subu	r10,r10,1	; subtract 0 + 16r limbs (adjust loop counter)
+Lbase:	ld	r8,r3,4
+	subu.cio r6,r6,r7
+	ld	r9,r4,4
+	st	r6,r2,0
+	ld	r6,r3,8		; subtract 15 + 16r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,8
+	st	r8,r2,4
+	ld	r8,r3,12	; subtract 14 + 16r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,12
+	st	r6,r2,8
+	ld	r6,r3,16	; subtract 13 + 16r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,16
+	st	r8,r2,12
+	ld	r8,r3,20	; subtract 12 + 16r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,20
+	st	r6,r2,16
+	ld	r6,r3,24	; subtract 11 + 16r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,24
+	st	r8,r2,20
+	ld	r8,r3,28	; subtract 10 + 16r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,28
+	st	r6,r2,24
+	ld	r6,r3,32	; subtract 9 + 16r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,32
+	st	r8,r2,28
+	ld	r8,r3,36	; subtract 8 + 16r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,36
+	st	r6,r2,32
+	ld	r6,r3,40	; subtract 7 + 16r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,40
+	st	r8,r2,36
+	ld	r8,r3,44	; subtract 6 + 16r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,44
+	st	r6,r2,40
+	ld	r6,r3,48	; subtract 5 + 16r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,48
+	st	r8,r2,44
+	ld	r8,r3,52	; subtract 4 + 16r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,52
+	st	r6,r2,48
+	ld	r6,r3,56	; subtract 3 + 16r limbs
+	subu.cio r8,r8,r9
+	ld	r7,r4,56
+	st	r8,r2,52
+	ld	r8,r3,60	; subtract 2 + 16r limbs
+	subu.cio r6,r6,r7
+	ld	r9,r4,60
+	st	r6,r2,56
+	bcnd.n	ne0,r10,Loop	; subtract 1 + 16r limbs
+	 subu.cio r8,r8,r9
+
+	st	r8,r2,60		; 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/m88k/m88110/mul_1.S b/sysdeps/m88k/m88110/mul_1.S
new file mode 100644
index 0000000000..7a07623865
--- /dev/null
+++ b/sysdeps/m88k/m88110/mul_1.S
@@ -0,0 +1,80 @@
+; mc88110 __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 General Public License as published by
+; the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+; You should have received a copy of the GNU General Public License
+; along with the GNU MP Library; see the file COPYING.  If not, write to
+; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+; INPUT PARAMETERS
+; res_ptr	r2
+; s1_ptr	r3
+; size		r4
+; s2_limb	r5
+
+#include "sysdep.h"
+
+ENTRY (__mpn_mul_1)
+	ld	 r6,r3,0
+	sub	 r4,r0,r4
+	sub	 r3,r3,r4		; r3 is offset s1_ptr
+	sub	 r2,r2,r4
+	sub	 r8,r2,8		; r8 is offset res_ptr
+	mulu.d	 r10,r6,r5
+
+	addu	 r4,r4,1
+	bcnd	 eq0,r4,Lend
+	 addu.co r2,r0,0		; clear cy_limb
+
+Loop:	ld	 r6,r3[r4]
+	addu.cio r9,r11,r2
+	or	 r2,r10,r0		; could be avoided if unrolled
+	addu	 r4,r4,1
+	mulu.d	 r10,r6,r5
+	bcnd	 ne0,r4,Loop
+	 st	 r9,r8[r4]
+
+Lend:	addu.cio r9,r11,r2
+	st	 r9,r8,4
+	jmp.n	 r1
+	 addu.ci r2,r10,r0
+
+; This is the Right Way to do this on '110.  4 cycles / 64-bit limb.
+;	ld.d	r10,
+;	mulu.d
+;	addu.cio
+;	addu.cio
+;	st.d
+;	mulu.d	,r11,r5
+;	ld.d	r12,
+;	mulu.d	,r10,r5
+;	addu.cio
+;	addu.cio
+;	st.d
+;	mulu.d
+;	ld.d	r10,
+;	mulu.d
+;	addu.cio
+;	addu.cio
+;	st.d
+;	mulu.d
+;	ld.d	r10,
+;	mulu.d
+;	addu.cio
+;	addu.cio
+;	st.d
+;	mulu.d
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-01 10:11:15 +0000