| 1 | #include <lightning.h> |
| 2 | #include <stdio.h> |
| 3 | |
| 4 | //#define DEBUG 1 |
| 5 | |
| 6 | jit_state_t *_jit; |
| 7 | |
| 8 | int |
| 9 | main(int argc, char *argv[]) |
| 10 | { |
| 11 | int off; |
| 12 | void (*code)(void); |
| 13 | jit_node_t *jmp, *inner, *fail; |
| 14 | |
| 15 | init_jit(argv[0]); |
| 16 | _jit = jit_new_state(); |
| 17 | |
| 18 | jmp = jit_jmpi(); |
| 19 | |
| 20 | /* Create a simple function that changes all available JIT_Vx */ |
| 21 | inner = jit_label(); |
| 22 | jit_prolog(); |
| 23 | for (off = JIT_R_NUM - 1; off >= 0; --off) { |
| 24 | if (jit_callee_save_p(JIT_R(off))) |
| 25 | jit_movi(JIT_R(off), (off + 1) * 2); |
| 26 | } |
| 27 | for (off = JIT_V_NUM - 1; off >= 0; --off) |
| 28 | jit_movi(JIT_V(off), -(off + 1)); |
| 29 | /* If fprs are callee save, also test them */ |
| 30 | for (off = JIT_F_NUM - 1; off >= 0; --off) { |
| 31 | if (jit_callee_save_p(JIT_F(off))) |
| 32 | jit_movi_d(JIT_F(off), -(off + 1)); |
| 33 | } |
| 34 | /* Add some noise as there might be some error in the stack frame and |
| 35 | * a standard C function might clobber registers saved in the stack */ |
| 36 | jit_prepare(); |
| 37 | jit_pushargi((jit_word_t)stderr); |
| 38 | jit_pushargi((jit_word_t) |
| 39 | "%d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d " |
| 40 | "%f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f\n"); |
| 41 | jit_ellipsis(); |
| 42 | jit_pushargi(1); |
| 43 | jit_pushargi(2); |
| 44 | jit_pushargi(3); |
| 45 | jit_pushargi(4); |
| 46 | jit_pushargi(5); |
| 47 | jit_pushargi(6); |
| 48 | jit_pushargi(7); |
| 49 | jit_pushargi(8); |
| 50 | jit_pushargi(9); |
| 51 | jit_pushargi(10); |
| 52 | jit_pushargi(11); |
| 53 | jit_pushargi(12); |
| 54 | jit_pushargi(13); |
| 55 | jit_pushargi(14); |
| 56 | jit_pushargi(15); |
| 57 | jit_pushargi(16); |
| 58 | jit_pushargi(17); |
| 59 | jit_pushargi(18); |
| 60 | jit_pushargi(19); |
| 61 | jit_pushargi(20); |
| 62 | jit_pushargi_d(1); |
| 63 | jit_pushargi_d(2); |
| 64 | jit_pushargi_d(3); |
| 65 | jit_pushargi_d(4); |
| 66 | jit_pushargi_d(5); |
| 67 | jit_pushargi_d(6); |
| 68 | jit_pushargi_d(7); |
| 69 | jit_pushargi_d(8); |
| 70 | jit_pushargi_d(9); |
| 71 | jit_pushargi_d(10); |
| 72 | jit_pushargi_d(11); |
| 73 | jit_pushargi_d(12); |
| 74 | jit_pushargi_d(13); |
| 75 | jit_pushargi_d(14); |
| 76 | jit_pushargi_d(15); |
| 77 | jit_pushargi_d(16); |
| 78 | jit_pushargi_d(17); |
| 79 | jit_pushargi_d(18); |
| 80 | jit_pushargi_d(19); |
| 81 | jit_pushargi_d(20); |
| 82 | jit_finishi(fprintf); |
| 83 | jit_ret(); |
| 84 | jit_epilog(); |
| 85 | |
| 86 | jit_patch(jmp); |
| 87 | jit_prolog(); |
| 88 | |
| 89 | for (off = JIT_R_NUM - 1; off >= 0; --off) { |
| 90 | if (jit_callee_save_p(JIT_R(off))) |
| 91 | jit_movi(JIT_R(off), -(off + 1) * 2); |
| 92 | } |
| 93 | for (off = JIT_V_NUM - 1; off >= 0; --off) |
| 94 | jit_movi(JIT_V(off), 0x7fffffff - (off + 1)); |
| 95 | /* If fprs are callee save, also test them */ |
| 96 | for (off = JIT_F_NUM - 1; off >= 0; --off) { |
| 97 | if (jit_callee_save_p(JIT_F(off))) |
| 98 | jit_movi_d(JIT_F(off), 0x7fffffff - (off + 1)); |
| 99 | } |
| 100 | jit_patch_at(jit_calli(NULL), inner); |
| 101 | |
| 102 | /* Now validate no register has been clobbered */ |
| 103 | fail = jit_forward(); |
| 104 | |
| 105 | for (off = JIT_R_NUM - 1; off >= 0; --off) { |
| 106 | if (jit_callee_save_p(JIT_R(off))) { |
| 107 | #if DEBUG |
| 108 | jmp = jit_beqi(JIT_R(off), -(off + 1) * 2); |
| 109 | jit_calli(abort); |
| 110 | jit_patch(jmp); |
| 111 | #else |
| 112 | jit_patch_at(jit_bnei(JIT_R(off), -(off + 1) * 2), fail); |
| 113 | #endif |
| 114 | } |
| 115 | } |
| 116 | for (off = JIT_V_NUM - 1; off >= 0; --off) { |
| 117 | #if DEBUG |
| 118 | jmp = jit_beqi(JIT_V(off), 0x7fffffff - (off + 1)); |
| 119 | jit_calli(abort); |
| 120 | jit_patch(jmp); |
| 121 | #else |
| 122 | jit_patch_at(jit_bnei(JIT_V(off), 0x7fffffff - (off + 1)), fail); |
| 123 | #endif |
| 124 | } |
| 125 | for (off = JIT_F_NUM - 1; off >= 0; --off) { |
| 126 | if (jit_callee_save_p(JIT_F(off))) { |
| 127 | #if DEBUG |
| 128 | jmp = jit_beqi_d(JIT_F(off), 0x7fffffff - (off + 1)); |
| 129 | jit_calli(abort); |
| 130 | jit_patch(jmp); |
| 131 | #else |
| 132 | jit_patch_at(jit_bnei_d(JIT_F(off), 0x7fffffff - (off + 1)), fail); |
| 133 | #endif |
| 134 | } |
| 135 | } |
| 136 | #if !DEBUG |
| 137 | /* Done if passed all tests */ |
| 138 | jmp = jit_jmpi(); |
| 139 | /* Where to land if there was any register clobber */ |
| 140 | jit_link(fail); |
| 141 | jit_calli(abort); |
| 142 | /* done */ |
| 143 | jit_patch(jmp); |
| 144 | #endif |
| 145 | |
| 146 | jit_ret(); |
| 147 | jit_epilog(); |
| 148 | |
| 149 | code = jit_emit(); |
| 150 | jit_clear_state(); |
| 151 | |
| 152 | (*code)(); |
| 153 | |
| 154 | jit_destroy_state(); |
| 155 | finish_jit(); |
| 156 | return (0); |
| 157 | } |