1 #include <stdio.h> 2 #include <stdint.h> 3 #include "opcodes.h" 4 5 #define BRASLCLOBBER "0","1","2","3","4","5","14", \ 6 "f0","f1","f2","f3","f4","f5","f6","f7" 7 8 void if_eq(void) { printf("equal\n"); } 9 void if_ne(void) { printf("not equal\n"); } 10 void if_gt(void) { printf("greater than\n"); } 11 void if_le(void) { printf("less or equal\n"); } 12 void if_lt(void) { printf("less than\n"); } 13 void if_ge(void) { printf("greater or equal\n"); } 14 void if_taken(void) { printf("taken\n"); } 15 void if_not_taken(void) { printf("not taken\n"); } 16 17 #undef LT 18 #define NEVER 0 19 #define GT 2 20 #define LT 4 21 #define NE 6 22 #define EQ 8 23 #define LE C 24 #define GE A 25 #define ALWAYS E 26 27 28 void compare_never(uint64_t value) 29 { 30 register uint64_t val asm("r7") = value; 31 32 asm volatile( 33 "aghi 15,-160\n\t" 34 CLGIJ(7,NEVER,8,2a) "\n\t" /* 0x2a == 42 */ 35 "brasl 14,if_not_taken\n\t" 36 "j 0f\n\t" 37 "brasl 14,if_taken\n\t" 38 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 39 return; 40 } 41 42 void compare_always(uint64_t value) 43 { 44 register uint64_t val asm("r7") = value; 45 46 asm volatile( 47 "aghi 15,-160\n\t" 48 CLGIJ(7,ALWAYS,8,2a) "\n\t" /* 0x2a == 42 */ 49 "brasl 14,if_not_taken\n\t" 50 "j 0f\n\t" 51 "brasl 14,if_taken\n\t" 52 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 53 return; 54 } 55 56 void compare_le42(uint64_t value) 57 { 58 register uint64_t val asm("r7") = value; 59 60 asm volatile( 61 "aghi 15,-160\n\t" 62 CLGIJ(7,LE,8,2a) "\n\t" /* 0x2a == 42 */ 63 "brasl 14,if_gt\n\t" 64 "j 0f\n\t" 65 "brasl 14,if_le\n\t" 66 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 67 return; 68 } 69 70 void compare_ge42(uint64_t value) 71 { 72 register uint64_t val asm("r7") = value; 73 74 asm volatile( 75 "aghi 15,-160\n\t" 76 CLGIJ(7,GE,8,2a) "\n\t" /* 0x2a == 42 */ 77 "brasl 14,if_lt\n\t" 78 "j 0f\n\t" 79 "brasl 14,if_ge\n\t" 80 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 81 return; 82 } 83 84 void compare_gt42(uint64_t value) 85 { 86 register uint64_t val asm("r7") = value; 87 88 asm volatile( 89 "aghi 15,-160\n\t" 90 CLGIJ(7,GT,8,2a) "\n\t" /* 0x2a == 42 */ 91 "brasl 14,if_le\n\t" 92 "j 0f\n\t" 93 "brasl 14,if_gt\n\t" 94 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 95 return; 96 } 97 98 void compare_lt42(uint64_t value) 99 { 100 register uint64_t val asm("r7") = value; 101 102 asm volatile( 103 "aghi 15,-160\n\t" 104 CLGIJ(7,LT,8,2a) "\n\t" /* 0x2a == 42 */ 105 "brasl 14,if_ge\n\t" 106 "j 0f\n\t" 107 "brasl 14,if_lt\n\t" 108 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 109 return; 110 } 111 112 void compare_eq42(uint64_t value) 113 { 114 register uint64_t val asm("r7") = value; 115 116 asm volatile( 117 "aghi 15,-160\n\t" 118 CLGIJ(7,EQ,8,2a) "\n\t" /* 0x2a == 42 */ 119 "brasl 14,if_ne\n\t" 120 "j 0f\n\t" 121 "brasl 14,if_eq\n\t" 122 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 123 return; 124 } 125 126 void compare_ne42(uint64_t value) 127 { 128 register uint64_t val asm("r7") = value; 129 130 asm volatile( 131 "aghi 15,-160\n\t" 132 CLGIJ(7,NE,8,2a) "\n\t" /* 0x2a == 42 */ 133 "brasl 14,if_eq\n\t" 134 "j 0f\n\t" 135 "brasl 14,if_ne\n\t" 136 "0: aghi 15,160\n\t" : : "d"(val) : "15", BRASLCLOBBER); 137 return; 138 } 139 140 int main() 141 { 142 compare_eq42(12); 143 compare_eq42(42); 144 compare_eq42(100); 145 146 compare_ne42(12); 147 compare_ne42(42); 148 compare_ne42(100); 149 150 compare_gt42(12); 151 compare_gt42(42); 152 compare_gt42(100); 153 154 compare_lt42(12); 155 compare_lt42(42); 156 compare_lt42(100); 157 158 compare_le42(12); 159 compare_le42(42); 160 compare_le42(100); 161 162 compare_ge42(12); 163 compare_ge42(42); 164 compare_ge42(100); 165 166 compare_never(12); 167 compare_never(42); 168 compare_never(100); 169 170 compare_always(12); 171 compare_always(42); 172 compare_always(100); 173 174 return 0; 175 } 176
