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+# VAX __mpn_mul_1 -- Multiply a limb vector with a limb and store
+# the result 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 (sp + 4)
+# s1_ptr (sp + 8)
+# size (sp + 12)
+# s2_limb (sp + 16)
+
+.text
+ .align 1
+.globl ___mpn_mul_1
+___mpn_mul_1:
+ .word 0xfc0
+ movl 12(ap),r4
+ movl 8(ap),r8
+ movl 4(ap),r9
+ movl 16(ap),r6
+ jlss s2_big
+
+# One might want to combine the addl2 and the store below, but that
+# is actually just slower according to my timing tests. (VAX 3600)
+
+ clrl r3
+ incl r4
+ ashl $-1,r4,r7
+ jlbc r4,L1
+ clrl r11
+
+# Loop for S2_LIMB < 0x80000000
+Loop1: movl (r8)+,r1
+ jlss L1n0
+ emul r1,r6,$0,r2
+ addl2 r11,r2
+ adwc $0,r3
+ movl r2,(r9)+
+L1: movl (r8)+,r1
+ jlss L1n1
+L1p1: emul r1,r6,$0,r10
+ addl2 r3,r10
+ adwc $0,r11
+ movl r10,(r9)+
+
+ jsobgtr r7,Loop1
+ movl r11,r0
+ ret
+
+L1n0: emul r1,r6,$0,r2
+ addl2 r11,r2
+ adwc r6,r3
+ movl r2,(r9)+
+ movl (r8)+,r1
+ jgeq L1p1
+L1n1: emul r1,r6,$0,r10
+ addl2 r3,r10
+ adwc r6,r11
+ movl r10,(r9)+
+
+ jsobgtr r7,Loop1
+ movl r11,r0
+ ret
+
+
+s2_big: clrl r3
+ incl r4
+ ashl $-1,r4,r7
+ jlbc r4,L2
+ clrl r11
+
+# Loop for S2_LIMB >= 0x80000000
+Loop2: movl (r8)+,r1
+ jlss L2n0
+ emul r1,r6,$0,r2
+ addl2 r11,r2
+ adwc r1,r3
+ movl r2,(r9)+
+L2: movl (r8)+,r1
+ jlss L2n1
+L2p1: emul r1,r6,$0,r10
+ addl2 r3,r10
+ adwc r1,r11
+ movl r10,(r9)+
+
+ jsobgtr r7,Loop2
+ movl r11,r0
+ ret
+
+L2n0: emul r1,r6,$0,r2
+ addl2 r1,r3
+ addl2 r11,r2
+ adwc r6,r3
+ movl r2,(r9)+
+ movl (r8)+,r1
+ jgeq L2p1
+L2n1: emul r1,r6,$0,r10
+ addl2 r1,r11
+ addl2 r3,r10
+ adwc r6,r11
+ movl r10,(r9)+
+
+ jsobgtr r7,Loop2
+ movl r11,r0
+ ret