1ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
2ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <stdio.h>
3ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <stdlib.h>
4ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <string.h>
5ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
6ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Apparently the "b" register constraint is like "r" except that it
7ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown   disallows the use of r0, which means it is safe to use in places
8ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown   where the appearance of r0 would cause a problem due to it being
9ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown   read as zero. */
10ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
11ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic void announce ( char* str )
12ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{
13ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown   printf("------ %s ------\n", str);
14ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown}
15ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
16ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownint main ( void )
17ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{
18ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  int i;
19ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  char* a1 = malloc(100);
20ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  char* a2 = malloc(100);
21ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  strcpy(a1,"here is a stringHERE IS A STRING");
22ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
23ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  announce("lswi n == 8 (fe special cased)");
24ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  asm volatile("li 5,0\n\t"
25ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "lswi 3,%0, 8\n\t"
26ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 3,0(%1)\n\t"
27ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 4,4(%1)\n\t"
28ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 5,8(%1)\n\t"
29ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               : : "b"(a1), "b"(a2) : "r3", "r4", "r5",
30ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown                                      "cc", "memory" );
31ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("%s\n", a2);
32ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  for (i = 0; i < 12; i++)
33ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown    printf("%d = 0x%2x\n", i, a2[i]);
34ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("\n");
35ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
36ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
37ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  announce("lswi n /= 8");
38ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  asm volatile("lswi 3,%0, 9\n\t"
39ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 3,0(%1)\n\t"
40ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 4,4(%1)\n\t"
41ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 5,8(%1)\n\t"
42ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               : : "b"(a1), "b"(a2) : "r3", "r4", "r5",
43ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown                                      "cc", "memory" );
44ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("%s\n", a2);
45ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  for (i = 0; i < 12; i++)
46ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown    printf("%d = 0x%2x\n", i, a2[i]);
47ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("\n");
48ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
49ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
50ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  announce("lswx");
51ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  free(a2);
52ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  a2 = malloc(100);
53ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  asm volatile("li  8, 11\n\t"
54ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "mtxer 8\n\t"
55ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "lswx 3,%0,%2\n\t"
56ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 3,0(%1)\n\t"
57ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 4,4(%1)\n\t"
58ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stw 5,8(%1)\n\t"
59ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               : : "b"(a1), "b"(a2), "b"(16) : "r3", "r4", "r5", "r8",
60ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown                                               "cc", "memory" );
61ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("%s\n", a2);
62ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  for (i = 0; i < 12; i++)
63ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown     printf("%d = 0x%2x\n", i, a2[i]);
64ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("\n");
65ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
66ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
67ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  announce("stswi n == 8 (fe special cased)");
68ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  free(a2);
69ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  a2 = calloc(100,1);
70ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  asm volatile("lswi 3,%0, 19\n\t"
71ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stswi 3,%1, 8\n"
72ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	       : : "b"(a1), "b"(a2) : "r3","r4","r5","r6","r7",
73ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown                                      "cc", "memory" );
74ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("%s\n", a2);
75ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("\n");
76ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
77ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
78ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  announce("stswi n /= 8");
79ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  free(a2);
80ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  a2 = calloc(100,1);
81ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  asm volatile("lswi 3,%0, 19\n\t"
82ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stswi 3,%1, 17\n"
83ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	       : : "b"(a1), "b"(a2) : "r3","r4","r5","r6","r7",
84ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown                                      "cc", "memory" );
85ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("%s\n", a2);
86ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("\n");
87ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
88ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
89ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  announce("stswx");
90ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  free(a2);
91ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  a2 = calloc(100,1);
92ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  asm volatile("li  8, 11\n\t"
93ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "mtxer 8\n\t"
94ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "lswx  3,%0,%2\n\t"
95ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               "stswx 3,%1,%2\n\t"
96ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown               : : "b"(a1), "b"(a2), "b"(16) : "r3", "r4", "r5", "r8",
97ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown                                               "cc", "memory" );
98ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("%s\n", a2+16);
99ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  printf("\n");
100ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
101ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown  return 0;
102ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown}
103