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// 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>
unsigned long long res64 = -1;
unsigned int res32 = -1;
unsigned short res16 = -1;
int test(void)
{
int ex;
feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
asm volatile ("\n"
" fld1""\n"
" fisttp res16""\n"
" fld1""\n"
" fisttpl res32""\n"
" fld1""\n"
" fisttpll res64""\n"
: : : "memory"
);
if (res16 != 1 || res32 != 1 || res64 != 1) {
printf("[BAD]\tfisttp 1\n");
return 1;
}
ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
if (ex != 0) {
printf("[BAD]\tfisttp 1: wrong exception state\n");
return 1;
}
feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
asm volatile ("\n"
" fldpi""\n"
" fisttp res16""\n"
" fldpi""\n"
" fisttpl res32""\n"
" fldpi""\n"
" fisttpll res64""\n"
: : : "memory"
);
if (res16 != 3 || res32 != 3 || res64 != 3) {
printf("[BAD]\tfisttp pi\n");
return 1;
}
ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
if (ex != FE_INEXACT) {
printf("[BAD]\tfisttp pi: wrong exception state\n");
return 1;
}
feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
asm volatile ("\n"
" fldpi""\n"
" fchs""\n"
" fisttp res16""\n"
" fldpi""\n"
" fchs""\n"
" fisttpl res32""\n"
" fldpi""\n"
" fchs""\n"
" fisttpll res64""\n"
: : : "memory"
);
if (res16 != 0xfffd || res32 != 0xfffffffd || res64 != 0xfffffffffffffffdULL) {
printf("[BAD]\tfisttp -pi\n");
return 1;
}
ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
if (ex != FE_INEXACT) {
printf("[BAD]\tfisttp -pi: wrong exception state\n");
return 1;
}
feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
asm volatile ("\n"
" fldln2""\n"
" fisttp res16""\n"
" fldln2""\n"
" fisttpl res32""\n"
" fldln2""\n"
" fisttpll res64""\n"
: : : "memory"
);
/* Test truncation to zero (round-to-nearest would give 1 here) */
if (res16 != 0 || res32 != 0 || res64 != 0) {
printf("[BAD]\tfisttp ln2\n");
return 1;
}
ex = fetestexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
if (ex != FE_INEXACT) {
printf("[BAD]\tfisttp ln2: wrong exception state\n");
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 fisttp 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 fisttp instructions\n");
err |= test();
if (!err)
printf("[OK]\tfisttp\n");
else
printf("[FAIL]\tfisttp errors: %d\n", err);
return err;
}
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