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1.1 maekawa 1: # MIPS2 __mpn_add_n -- Add two limb vectors of the same length > 0 and
2: # store sum in a third limb vector.
3:
4: # Copyright (C) 1995 Free Software Foundation, Inc.
5:
6: # This file is part of the GNU MP Library.
7:
8: # The GNU MP Library is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU Library General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or (at your
11: # option) any later version.
12:
13: # The GNU MP Library is distributed in the hope that it will be useful, but
14: # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15: # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
16: # License for more details.
17:
18: # You should have received a copy of the GNU Library General Public License
19: # along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20: # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21: # MA 02111-1307, USA.
22:
23:
24: # INPUT PARAMETERS
25: # res_ptr $4
26: # s1_ptr $5
27: # s2_ptr $6
28: # size $7
29:
30: .text
31: .align 2
32: .globl __mpn_add_n
33: .ent __mpn_add_n
34: __mpn_add_n:
35: .set noreorder
36: .set nomacro
37:
38: lw $10,0($5)
39: lw $11,0($6)
40:
41: addiu $7,$7,-1
42: and $9,$7,4-1 # number of limbs in first loop
43: beq $9,$0,.L0 # if multiple of 4 limbs, skip first loop
44: move $2,$0
45:
46: subu $7,$7,$9
47:
48: .Loop0: addiu $9,$9,-1
49: lw $12,4($5)
50: addu $11,$11,$2
51: lw $13,4($6)
52: sltu $8,$11,$2
53: addu $11,$10,$11
54: sltu $2,$11,$10
55: sw $11,0($4)
56: or $2,$2,$8
57:
58: addiu $5,$5,4
59: addiu $6,$6,4
60: move $10,$12
61: move $11,$13
62: bne $9,$0,.Loop0
63: addiu $4,$4,4
64:
65: .L0: beq $7,$0,.Lend
66: nop
67:
68: .Loop: addiu $7,$7,-4
69:
70: lw $12,4($5)
71: addu $11,$11,$2
72: lw $13,4($6)
73: sltu $8,$11,$2
74: addu $11,$10,$11
75: sltu $2,$11,$10
76: sw $11,0($4)
77: or $2,$2,$8
78:
79: lw $10,8($5)
80: addu $13,$13,$2
81: lw $11,8($6)
82: sltu $8,$13,$2
83: addu $13,$12,$13
84: sltu $2,$13,$12
85: sw $13,4($4)
86: or $2,$2,$8
87:
88: lw $12,12($5)
89: addu $11,$11,$2
90: lw $13,12($6)
91: sltu $8,$11,$2
92: addu $11,$10,$11
93: sltu $2,$11,$10
94: sw $11,8($4)
95: or $2,$2,$8
96:
97: lw $10,16($5)
98: addu $13,$13,$2
99: lw $11,16($6)
100: sltu $8,$13,$2
101: addu $13,$12,$13
102: sltu $2,$13,$12
103: sw $13,12($4)
104: or $2,$2,$8
105:
106: addiu $5,$5,16
107: addiu $6,$6,16
108:
109: bne $7,$0,.Loop
110: addiu $4,$4,16
111:
112: .Lend: addu $11,$11,$2
113: sltu $8,$11,$2
114: addu $11,$10,$11
115: sltu $2,$11,$10
116: sw $11,0($4)
117: j $31
118: or $2,$2,$8
119:
120: .end __mpn_add_n