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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 | // SPDX-License-Identifier: GPL-2.0 #undef _GNU_SOURCE #define _GNU_SOURCE 1 #undef __USE_GNU #define __USE_GNU 1 #include <unistd.h> #include <stdlib.h> #include <string.h> #include <stdio.h> #include <signal.h> #include <sys/types.h> #include <sys/select.h> #include <sys/time.h> #include <sys/wait.h> #include <fenv.h> enum { CF = 1 << 0, PF = 1 << 2, ZF = 1 << 6, ARITH = CF | PF | ZF, }; long res_fcomi_pi_1; long res_fcomi_1_pi; long res_fcomi_1_1; long res_fcomi_nan_1; /* sNaN is s|111 1111 1|1xx xxxx xxxx xxxx xxxx xxxx */ /* qNaN is s|111 1111 1|0xx xxxx xxxx xxxx xxxx xxxx (some x must be nonzero) */ int snan = 0x7fc11111; int qnan = 0x7f811111; unsigned short snan1[5]; /* sNaN80 is s|111 1111 1111 1111 |10xx xx...xx (some x must be nonzero) */ unsigned short snan80[5] = { 0x1111, 0x1111, 0x1111, 0x8111, 0x7fff }; int test(long flags) { feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW); asm ("\n" " push %0""\n" " popf""\n" " fld1""\n" " fldpi""\n" " fcomi %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " ffree %%st(1)" "\n" " pushf""\n" " pop res_fcomi_1_pi""\n" " push %0""\n" " popf""\n" " fldpi""\n" " fld1""\n" " fcomi %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " ffree %%st(1)" "\n" " pushf""\n" " pop res_fcomi_pi_1""\n" " push %0""\n" " popf""\n" " fld1""\n" " fld1""\n" " fcomi %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " ffree %%st(1)" "\n" " pushf""\n" " pop res_fcomi_1_1""\n" : : "r" (flags) ); if ((res_fcomi_1_pi & ARITH) != (0)) { printf("[BAD]\tfcomi_1_pi with flags:%lx\n", flags); return 1; } if ((res_fcomi_pi_1 & ARITH) != (CF)) { printf("[BAD]\tfcomi_pi_1 with flags:%lx->%lx\n", flags, res_fcomi_pi_1 & ARITH); return 1; } if ((res_fcomi_1_1 & ARITH) != (ZF)) { printf("[BAD]\tfcomi_1_1 with flags:%lx\n", flags); return 1; } if (fetestexcept(FE_INVALID) != 0) { printf("[BAD]\tFE_INVALID is set in %s\n", __func__); return 1; } return 0; } int test_qnan(long flags) { feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW); asm ("\n" " push %0""\n" " popf""\n" " flds qnan""\n" " fld1""\n" " fnclex""\n" // fld of a qnan raised FE_INVALID, clear it " fcomi %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " ffree %%st(1)" "\n" " pushf""\n" " pop res_fcomi_nan_1""\n" : : "r" (flags) ); if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) { printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags); return 1; } if (fetestexcept(FE_INVALID) != FE_INVALID) { printf("[BAD]\tFE_INVALID is not set in %s\n", __func__); return 1; } return 0; } int testu_qnan(long flags) { feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW); asm ("\n" " push %0""\n" " popf""\n" " flds qnan""\n" " fld1""\n" " fnclex""\n" // fld of a qnan raised FE_INVALID, clear it " fucomi %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " ffree %%st(1)" "\n" " pushf""\n" " pop res_fcomi_nan_1""\n" : : "r" (flags) ); if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) { printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags); return 1; } if (fetestexcept(FE_INVALID) != 0) { printf("[BAD]\tFE_INVALID is set in %s\n", __func__); return 1; } return 0; } int testu_snan(long flags) { feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW); asm ("\n" " push %0""\n" " popf""\n" // " flds snan""\n" // WRONG, this will convert 32-bit fp snan to a *qnan* in 80-bit fp register! // " fstpt snan1""\n" // if uncommented, it prints "snan1:7fff c111 1100 0000 0000" - c111, not 8111! // " fnclex""\n" // flds of a snan raised FE_INVALID, clear it " fldt snan80""\n" // fldt never raise FE_INVALID " fld1""\n" " fucomi %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " ffree %%st(1)" "\n" " pushf""\n" " pop res_fcomi_nan_1""\n" : : "r" (flags) ); if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) { printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags); return 1; } // printf("snan:%x snan1:%04x %04x %04x %04x %04x\n", snan, snan1[4], snan1[3], snan1[2], snan1[1], snan1[0]); if (fetestexcept(FE_INVALID) != FE_INVALID) { printf("[BAD]\tFE_INVALID is not set in %s\n", __func__); return 1; } return 0; } int testp(long flags) { feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW); asm ("\n" " push %0""\n" " popf""\n" " fld1""\n" " fldpi""\n" " fcomip %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " pushf""\n" " pop res_fcomi_1_pi""\n" " push %0""\n" " popf""\n" " fldpi""\n" " fld1""\n" " fcomip %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " pushf""\n" " pop res_fcomi_pi_1""\n" " push %0""\n" " popf""\n" " fld1""\n" " fld1""\n" " fcomip %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " pushf""\n" " pop res_fcomi_1_1""\n" : : "r" (flags) ); if ((res_fcomi_1_pi & ARITH) != (0)) { printf("[BAD]\tfcomi_1_pi with flags:%lx\n", flags); return 1; } if ((res_fcomi_pi_1 & ARITH) != (CF)) { printf("[BAD]\tfcomi_pi_1 with flags:%lx->%lx\n", flags, res_fcomi_pi_1 & ARITH); return 1; } if ((res_fcomi_1_1 & ARITH) != (ZF)) { printf("[BAD]\tfcomi_1_1 with flags:%lx\n", flags); return 1; } if (fetestexcept(FE_INVALID) != 0) { printf("[BAD]\tFE_INVALID is set in %s\n", __func__); return 1; } return 0; } int testp_qnan(long flags) { feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW); asm ("\n" " push %0""\n" " popf""\n" " flds qnan""\n" " fld1""\n" " fnclex""\n" // fld of a qnan raised FE_INVALID, clear it " fcomip %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " pushf""\n" " pop res_fcomi_nan_1""\n" : : "r" (flags) ); if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) { printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags); return 1; } if (fetestexcept(FE_INVALID) != FE_INVALID) { printf("[BAD]\tFE_INVALID is not set in %s\n", __func__); return 1; } return 0; } int testup_qnan(long flags) { feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW); asm ("\n" " push %0""\n" " popf""\n" " flds qnan""\n" " fld1""\n" " fnclex""\n" // fld of a qnan raised FE_INVALID, clear it " fucomip %%st(1), %%st" "\n" " ffree %%st(0)" "\n" " pushf""\n" " pop res_fcomi_nan_1""\n" : : "r" (flags) ); if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) { printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags); return 1; } if (fetestexcept(FE_INVALID) != 0) { printf("[BAD]\tFE_INVALID is set in %s\n", __func__); return 1; } return 0; } void sighandler(int sig) { printf("[FAIL]\tGot signal %d, exiting\n", sig); exit(1); } int main(int argc, char **argv, char **envp) { int err = 0; /* SIGILL triggers on 32-bit kernels w/o fcomi emulation * when run with "no387 nofxsr". Other signals are caught * just in case. */ signal(SIGILL, sighandler); signal(SIGFPE, sighandler); signal(SIGSEGV, sighandler); printf("[RUN]\tTesting f[u]comi[p] instructions\n"); err |= test(0); err |= test_qnan(0); err |= testu_qnan(0); err |= testu_snan(0); err |= test(CF|ZF|PF); err |= test_qnan(CF|ZF|PF); err |= testu_qnan(CF|ZF|PF); err |= testu_snan(CF|ZF|PF); err |= testp(0); err |= testp_qnan(0); err |= testup_qnan(0); err |= testp(CF|ZF|PF); err |= testp_qnan(CF|ZF|PF); err |= testup_qnan(CF|ZF|PF); if (!err) printf("[OK]\tf[u]comi[p]\n"); else printf("[FAIL]\tf[u]comi[p] errors: %d\n", err); return err; } |