1 #ifndef lint 2 static char optab_sccsid[] = "@(#)optab.c 4.5 (Berkeley) 01/16/89"; 3 #endif 4 5 /* 6 * adb - (read-only) tables for VAX instruction decoding 7 */ 8 9 #define ADB 10 #undef INSTTAB 11 12 /* 13 * Pick up definitions for insttab from the assembler, and also 14 * the arrays ty_NORELOC and ty_nbyte (and soon ty_float); 15 * then, make insttab. 16 */ 17 #include <sys/types.h> 18 #include "instrs.h" 19 #include "assizetab.c" 20 21 struct insttab insttab[] = { 22 #include "instrs.adb" 23 0 24 }; 25 26 /* 27 * Register names, and floating point immediate constants. 28 * The f.p. constants can be derived from the expression 29 * 30 * fp = (.5 + (n & 7) / 16.0) x (2 ^ (n >> 3)) 31 * 32 * or, alternatively, 33 * 34 * union { int i; float f; } u; u.i = (n << 3) | (1 << 14); u.f 35 * 36 * but there are only 64 of them, and this is simpler. 37 */ 38 char *regname[16] = { 39 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", 40 "r8", "r9", "r10","r11","ap", "fp", "sp", "pc" 41 }; 42 char *fltimm[64] = { 43 "0.5", "0.5625", "0.625", "0.6875", "0.75", "0.8125", "0.875", "0.9375", 44 "1.0", "1.125", "1.25", "1.375", "1.5", "1.625", "1.75", "1.875", 45 "2.0", "2.25", "2.5", "2.75", "3.0", "3.25", "3.5", "3.75", 46 "4.0", "4.5", "5.0", "5.5", "6.0", "6.5", "7.0", "7.5", 47 "8.0", "9.0", "10.0", "11.0", "12.0", "13.0", "14.0", "15.0", 48 "16.0", "18.0", "20.0", "22.0", "24.0", "26.0", "28.0", "30.0", 49 "32.0", "36.0", "40.0", "44.0", "48.0", "52.0", "56.0", "60.0", 50 "64.0", "72.0", "80.0", "88.0", "96.0", "104.0", "112.0", "120.0" 51 }; 52