diff options
| -rw-r--r-- | tools/testing/selftests/x86/Makefile | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/x86/test_FISTTP.c | 137 |
2 files changed, 138 insertions, 1 deletions
diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile index c4c9b90..7145b3d 100644 --- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -6,7 +6,7 @@ include ../lib.mk TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs ldt_gdt syscall_nt TARGETS_C_32BIT_ONLY := entry_from_vm86 syscall_arg_fault sigreturn \ - test_FCMOV test_FCOMI + test_FCMOV test_FCOMI test_FISTTP TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY) BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32) diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c new file mode 100644 index 0000000..b8e61a0 --- /dev/null +++ b/tools/testing/selftests/x86/test_FISTTP.c @@ -0,0 +1,137 @@ +#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; +} |
