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/* 64-bit multiplication support for TILEPro.
   Copyright (C) 2011, 2012
   Free Software Foundation, Inc.
   Contributed by Walter Lee (walt@tilera.com)
 
   This file 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 3, or (at your option) any
   later version.
 
   This file 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.
 
   Under Section 7 of GPL version 3, you are granted additional
   permissions described in the GCC Runtime Library Exception, version
   3.1, as published by the Free Software Foundation.
 
   You should have received a copy of the GNU General Public License and
   a copy of the GCC Runtime Library Exception along with this program;
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   .  */
 
/* 64-bit multiplication support.  */
 
        .file "softmpy.S"
 
/* Parameters */
#define lo0             r9   /* low 32 bits of n0  */
#define hi0             r1   /* high 32 bits of n0 */
#define lo1             r2   /* low 32 bits of n1  */
#define hi1             r3   /* high 32 bits of n1 */
 
/* temps */
#define result1_a       r4
#define result1_b       r5
 
#define tmp0            r6
#define tmp0_left_16    r7
#define tmp1            r8
 
        .section .text.__muldi3, "ax"
        .align 8
        .globl __muldi3
        .type __muldi3, @function
__muldi3:
        {
         move        lo0, r0 /* so we can write "out r0" while "in r0" alive */
         mulhl_uu    tmp0, lo1, r0
        }
        {
         mulll_uu    result1_a, lo1, hi0
        }
        {
         move        tmp1, tmp0
         mulhla_uu   tmp0, lo0, lo1
        }
        {
         mulhlsa_uu  result1_a, lo1, hi0
        }
        {
         mulll_uu    result1_b, lo0, hi1
         slt_u       tmp1, tmp0, tmp1
        }
        {
         mulhlsa_uu  result1_a, lo0, hi1
         shli        r0, tmp0, 16
        }
        {
         move        tmp0_left_16, r0
         mulhha_uu   result1_b, lo0, lo1
        }
        {
         mullla_uu   r0, lo1, lo0
         shli        tmp1, tmp1, 16
        }
        {
         mulhlsa_uu  result1_b, hi0, lo1
         inthh       tmp1, tmp1, tmp0
        }
        {
         mulhlsa_uu  result1_a, hi1, lo0
         slt_u       tmp0, r0, tmp0_left_16
        }
        /* NOTE: this will stall for a cycle here. Oh well. */
        {
         add         r1, tmp0, tmp1
         add         result1_a, result1_a, result1_b
        }
        {
         add         r1, r1, result1_a
         jrp         lr
        }
        .size __muldi3,.-__muldi3

Line No.	Rev	Author	Line
1	734	jeremybenn	`/* 64-bit multiplication support for TILEPro.`
2			`Copyright (C) 2011, 2012`
3			`Free Software Foundation, Inc.`
4			`Contributed by Walter Lee (walt@tilera.com)`
5
6			`This file is free software; you can redistribute it and/or modify it`
7			`under the terms of the GNU General Public License as published by the`
8			`Free Software Foundation; either version 3, or (at your option) any`
9			`later version.`
10
11			`This file is distributed in the hope that it will be useful, but`
12			`WITHOUT ANY WARRANTY; without even the implied warranty of`
13			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
14			`General Public License for more details.`
15
16			`Under Section 7 of GPL version 3, you are granted additional`
17			`permissions described in the GCC Runtime Library Exception, version`
18			`3.1, as published by the Free Software Foundation.`
19
20			`You should have received a copy of the GNU General Public License and`
21			`a copy of the GCC Runtime Library Exception along with this program;`
22			`see the files COPYING3 and COPYING.RUNTIME respectively. If not, see`
23			`. */`
24
25			`/* 64-bit multiplication support. */`
26
27			`.file "softmpy.S"`
28
29			`/* Parameters */`
30			`#define lo0 r9 /* low 32 bits of n0 */`
31			`#define hi0 r1 /* high 32 bits of n0 */`
32			`#define lo1 r2 /* low 32 bits of n1 */`
33			`#define hi1 r3 /* high 32 bits of n1 */`
34
35			`/* temps */`
36			`#define result1_a r4`
37			`#define result1_b r5`
38
39			`#define tmp0 r6`
40			`#define tmp0_left_16 r7`
41			`#define tmp1 r8`
42
43			`.section .text.__muldi3, "ax"`
44			`.align 8`
45			`.globl __muldi3`
46			`.type __muldi3, @function`
47			`__muldi3:`
48			`{`
49			`move lo0, r0 /* so we can write "out r0" while "in r0" alive */`
50			`mulhl_uu tmp0, lo1, r0`
51			`}`
52			`{`
53			`mulll_uu result1_a, lo1, hi0`
54			`}`
55			`{`
56			`move tmp1, tmp0`
57			`mulhla_uu tmp0, lo0, lo1`
58			`}`
59			`{`
60			`mulhlsa_uu result1_a, lo1, hi0`
61			`}`
62			`{`
63			`mulll_uu result1_b, lo0, hi1`
64			`slt_u tmp1, tmp0, tmp1`
65			`}`
66			`{`
67			`mulhlsa_uu result1_a, lo0, hi1`
68			`shli r0, tmp0, 16`
69			`}`
70			`{`
71			`move tmp0_left_16, r0`
72			`mulhha_uu result1_b, lo0, lo1`
73			`}`
74			`{`
75			`mullla_uu r0, lo1, lo0`
76			`shli tmp1, tmp1, 16`
77			`}`
78			`{`
79			`mulhlsa_uu result1_b, hi0, lo1`
80			`inthh tmp1, tmp1, tmp0`
81			`}`
82			`{`
83			`mulhlsa_uu result1_a, hi1, lo0`
84			`slt_u tmp0, r0, tmp0_left_16`
85			`}`
86			`/* NOTE: this will stall for a cycle here. Oh well. */`
87			`{`
88			`add r1, tmp0, tmp1`
89			`add result1_a, result1_a, result1_b`
90			`}`
91			`{`
92			`add r1, r1, result1_a`
93			`jrp lr`
94			`}`
95			`.size __muldi3,.-__muldi3`

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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [tilepro/] [softmpy.S] - Blame information for rev 751