139 lines · c
1// SPDX-License-Identifier: GPL-2.02#undef _GNU_SOURCE3#define _GNU_SOURCE 14#undef __USE_GNU5#define __USE_GNU 16#include <unistd.h>7#include <stdlib.h>8#include <string.h>9#include <stdio.h>10#include <signal.h>11#include <sys/types.h>12#include <sys/select.h>13#include <sys/time.h>14#include <sys/wait.h>15#include <fenv.h>16 17unsigned long long res64 = -1;18unsigned int res32 = -1;19unsigned short res16 = -1;20 21int test(void)22{23 int ex;24 25 feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);26 asm volatile ("\n"27 " fld1""\n"28 " fisttps res16""\n"29 " fld1""\n"30 " fisttpl res32""\n"31 " fld1""\n"32 " fisttpll res64""\n"33 : : : "memory"34 );35 if (res16 != 1 || res32 != 1 || res64 != 1) {36 printf("[BAD]\tfisttp 1\n");37 return 1;38 }39 ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);40 if (ex != 0) {41 printf("[BAD]\tfisttp 1: wrong exception state\n");42 return 1;43 }44 45 feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);46 asm volatile ("\n"47 " fldpi""\n"48 " fisttps res16""\n"49 " fldpi""\n"50 " fisttpl res32""\n"51 " fldpi""\n"52 " fisttpll res64""\n"53 : : : "memory"54 );55 if (res16 != 3 || res32 != 3 || res64 != 3) {56 printf("[BAD]\tfisttp pi\n");57 return 1;58 }59 ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);60 if (ex != FE_INEXACT) {61 printf("[BAD]\tfisttp pi: wrong exception state\n");62 return 1;63 }64 65 feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);66 asm volatile ("\n"67 " fldpi""\n"68 " fchs""\n"69 " fisttps res16""\n"70 " fldpi""\n"71 " fchs""\n"72 " fisttpl res32""\n"73 " fldpi""\n"74 " fchs""\n"75 " fisttpll res64""\n"76 : : : "memory"77 );78 if (res16 != 0xfffd || res32 != 0xfffffffd || res64 != 0xfffffffffffffffdULL) {79 printf("[BAD]\tfisttp -pi\n");80 return 1;81 }82 ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);83 if (ex != FE_INEXACT) {84 printf("[BAD]\tfisttp -pi: wrong exception state\n");85 return 1;86 }87 88 feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);89 asm volatile ("\n"90 " fldln2""\n"91 " fisttps res16""\n"92 " fldln2""\n"93 " fisttpl res32""\n"94 " fldln2""\n"95 " fisttpll res64""\n"96 : : : "memory"97 );98 /* Test truncation to zero (round-to-nearest would give 1 here) */99 if (res16 != 0 || res32 != 0 || res64 != 0) {100 printf("[BAD]\tfisttp ln2\n");101 return 1;102 }103 ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);104 if (ex != FE_INEXACT) {105 printf("[BAD]\tfisttp ln2: wrong exception state\n");106 return 1;107 }108 109 return 0;110}111 112void sighandler(int sig)113{114 printf("[FAIL]\tGot signal %d, exiting\n", sig);115 exit(1);116}117 118int main(int argc, char **argv, char **envp)119{120 int err = 0;121 122 /* SIGILL triggers on 32-bit kernels w/o fisttp emulation123 * when run with "no387 nofxsr". Other signals are caught124 * just in case.125 */126 signal(SIGILL, sighandler);127 signal(SIGFPE, sighandler);128 signal(SIGSEGV, sighandler);129 130 printf("[RUN]\tTesting fisttp instructions\n");131 err |= test();132 if (!err)133 printf("[OK]\tfisttp\n");134 else135 printf("[FAIL]\tfisttp errors: %d\n", err);136 137 return err;138}139