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1.1 root 1: #include "i860-opcode.h"
2: #include <stdio.h>
3:
4: extern long random();
5:
6: char *controlregs[] = { "fir", "psr", "epsr", "dirbase", "db", "fsr" };
7: #define NCREGS (sizeof controlregs / sizeof controlregs[0])
8:
9: char *textlabels[] = { "foo", "bar", "baz", "xork" };
10: #define NTLABELS (sizeof textlabels / sizeof textlabels[0])
11:
12: char *datalabels[] = { "data1", "data2", "data3", "data4" };
13: #define NDLABELS (sizeof datalabels / sizeof datalabels[0])
14:
15: /*
16: * Traverse the opcode table, dumping out sample instructions.
17: */
18: void
19: main(
20: int argc,
21: char *argv[],
22: char *envp[])
23: {
24: int i;
25: const char *arg;
26: int r1, r2, rd;
27:
28: printf( "\t.text\n%s:", textlabels[0] );
29: for ( i = 0; i < NUMOPCODES; ++i )
30: {
31: if ( i == (NUMOPCODES/3) )
32: printf( "%s:", textlabels[1] );
33: if ( i == (NUMOPCODES/2) )
34: printf( "%s:", textlabels[2] );
35:
36: if ( (random() & 0x30) == 0 &&
37: (i860_opcodes[i].match & OP_PREFIX_MASK) == PREFIX_FPU )
38: {
39: printf( "\td.%s\t", i860_opcodes[i].name );
40: }
41: else
42: printf( "\t%s\t", i860_opcodes[i].name );
43: r1 = random() & 0x1F;
44: do
45: r2 = random() & 0x1F;
46: while( (r2 & 0x1E) == (r1 & 0x1E) );
47: do
48: rd = random() & 0x1F;
49: while( (rd & 0x1E) == (r1 & 0x1E) || (rd & 0x1E) == (r2 & 0x1E) );
50:
51: for ( arg = i860_opcodes[i].args; *arg != '\0'; ++arg )
52: {
53: switch( *arg )
54: {
55: case '1': /* rs1 register, bits 11-15 of insn. */
56: case '2': /* rs2 register, bits 21-25 of insn. */
57: case 'd': /* rd register, bits 16-20 of insn. */
58: printf( "r%d", random() % 32);
59: break;
60:
61: case 'e': /* frs1 floating point register, bits 11-15 of insn*/
62: printf( "f%d", r1 );
63: break;
64:
65: case 'f': /* frs2 floating point register, bits 21-25 of insn*/
66: printf( "f%d", r2 );
67: break;
68:
69: case 'g': /* frsd floating point register, bits 16-20 of insn*/
70: printf( "f%d", rd );
71: break;
72:
73: case 'E': /* frs1 floating point register, bits 11-15 of insn*/
74: printf( "f%d", r1 & 0x1E );
75: break;
76:
77: case 'F': /* frs2 floating point register, bits 21-25 of insn*/
78: printf( "f%d", r2 & 0x1E );
79: break;
80:
81: case 'G': /* frsd floating point register, bits 16-20 of insn*/
82: printf( "f%d", rd & 0x1E );
83: break;
84:
85: case 'H': /* frsd floating point register, bits 16-20 of insn*/
86: printf( "f%d", rd & 0x1C );
87: break;
88:
89: case 'I': /* 16 bit High portion of address, I860_RELOC_HIGH. */
90: printf( "h%%%s", datalabels[random() % NDLABELS] );
91: break;
92:
93: case 'i': /* 16 bit byte address low half, */
94: case 'j': /* 16 bit short address, I860_RELOC_LOW1 */
95: case 'k': /* 16 bit word/int address low half, I860_RELOC_LOW2 */
96: case 'l': /* 16 bit 8-byte address (double) low half */
97: case 'm': /* 16 bit 16-byte address (quad) low half */
98: case 'n': /* 16 bit byte aligned low half, split fields */
99: case 'o': /* 16 bit short aligned low half, split fields */
100: case 'p': /* 16 bit int/word aligned low half, split fields */
101: printf( "l%%%s", datalabels[random() % NDLABELS] );
102: break;
103:
104: case 'J': /* 16 bit High portion of addr requiring adjustment*/
105: printf( "ha%%%s", datalabels[random() % NDLABELS] );
106: break;
107:
108: case 'K': /* 26 bit branch displacement */
109: case 'L': /* 16 bit split branch displacement */
110: printf( textlabels[random() % NTLABELS] );
111: break;
112:
113: case 'D': /* constant for shift opcode */
114: case 'B': /* 5 bit immediate, for bte and btne insn */
115: printf( "%d", random() % 32 );
116: break;
117:
118: case 'C': /* Control Register */
119: printf( controlregs[random() % NCREGS] );
120: break;
121:
122: default:
123: putchar( *arg );
124: break;
125: }
126: }
127: putchar( '\n' );
128: }
129: printf( "%s:\n", textlabels[3] );
130: printf( "nop\n" );
131: printf( "\t.text\n" );
132: printf( "data1: nop\n" );
133: printf( "data2: nop\n" );
134: printf( "data3: nop\n" );
135: printf( "data4: nop\n" );
136:
137: }
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