333 lines
7.2 KiB
C
333 lines
7.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#undef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#undef __USE_GNU
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#define __USE_GNU 1
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <fenv.h>
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enum {
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CF = 1 << 0,
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PF = 1 << 2,
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ZF = 1 << 6,
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ARITH = CF | PF | ZF,
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};
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long res_fcomi_pi_1;
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long res_fcomi_1_pi;
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long res_fcomi_1_1;
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long res_fcomi_nan_1;
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/* sNaN is s|111 1111 1|1xx xxxx xxxx xxxx xxxx xxxx */
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/* qNaN is s|111 1111 1|0xx xxxx xxxx xxxx xxxx xxxx (some x must be nonzero) */
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int snan = 0x7fc11111;
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int qnan = 0x7f811111;
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unsigned short snan1[5];
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/* sNaN80 is s|111 1111 1111 1111 |10xx xx...xx (some x must be nonzero) */
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unsigned short snan80[5] = { 0x1111, 0x1111, 0x1111, 0x8111, 0x7fff };
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int test(long flags)
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{
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feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
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asm ("\n"
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" push %0""\n"
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" popf""\n"
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" fld1""\n"
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" fldpi""\n"
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" fcomi %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" ffree %%st(1)" "\n"
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" pushf""\n"
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" pop res_fcomi_1_pi""\n"
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" push %0""\n"
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" popf""\n"
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" fldpi""\n"
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" fld1""\n"
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" fcomi %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" ffree %%st(1)" "\n"
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" pushf""\n"
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" pop res_fcomi_pi_1""\n"
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" push %0""\n"
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" popf""\n"
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" fld1""\n"
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" fld1""\n"
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" fcomi %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" ffree %%st(1)" "\n"
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" pushf""\n"
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" pop res_fcomi_1_1""\n"
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:
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: "r" (flags)
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);
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if ((res_fcomi_1_pi & ARITH) != (0)) {
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printf("[BAD]\tfcomi_1_pi with flags:%lx\n", flags);
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return 1;
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}
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if ((res_fcomi_pi_1 & ARITH) != (CF)) {
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printf("[BAD]\tfcomi_pi_1 with flags:%lx->%lx\n", flags, res_fcomi_pi_1 & ARITH);
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return 1;
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}
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if ((res_fcomi_1_1 & ARITH) != (ZF)) {
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printf("[BAD]\tfcomi_1_1 with flags:%lx\n", flags);
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return 1;
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}
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if (fetestexcept(FE_INVALID) != 0) {
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printf("[BAD]\tFE_INVALID is set in %s\n", __func__);
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return 1;
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}
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return 0;
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}
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int test_qnan(long flags)
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{
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feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
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asm ("\n"
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" push %0""\n"
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" popf""\n"
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" flds qnan""\n"
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" fld1""\n"
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" fnclex""\n" // fld of a qnan raised FE_INVALID, clear it
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" fcomi %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" ffree %%st(1)" "\n"
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" pushf""\n"
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" pop res_fcomi_nan_1""\n"
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:
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: "r" (flags)
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);
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if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) {
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printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags);
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return 1;
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}
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if (fetestexcept(FE_INVALID) != FE_INVALID) {
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printf("[BAD]\tFE_INVALID is not set in %s\n", __func__);
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return 1;
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}
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return 0;
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}
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int testu_qnan(long flags)
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{
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feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
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asm ("\n"
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" push %0""\n"
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" popf""\n"
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" flds qnan""\n"
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" fld1""\n"
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" fnclex""\n" // fld of a qnan raised FE_INVALID, clear it
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" fucomi %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" ffree %%st(1)" "\n"
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" pushf""\n"
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" pop res_fcomi_nan_1""\n"
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:
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: "r" (flags)
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);
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if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) {
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printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags);
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return 1;
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}
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if (fetestexcept(FE_INVALID) != 0) {
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printf("[BAD]\tFE_INVALID is set in %s\n", __func__);
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return 1;
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}
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return 0;
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}
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int testu_snan(long flags)
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{
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feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
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asm ("\n"
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" push %0""\n"
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" popf""\n"
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// " flds snan""\n" // WRONG, this will convert 32-bit fp snan to a *qnan* in 80-bit fp register!
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// " fstpt snan1""\n" // if uncommented, it prints "snan1:7fff c111 1100 0000 0000" - c111, not 8111!
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// " fnclex""\n" // flds of a snan raised FE_INVALID, clear it
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" fldt snan80""\n" // fldt never raise FE_INVALID
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" fld1""\n"
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" fucomi %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" ffree %%st(1)" "\n"
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" pushf""\n"
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" pop res_fcomi_nan_1""\n"
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:
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: "r" (flags)
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);
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if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) {
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printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags);
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return 1;
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}
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// printf("snan:%x snan1:%04x %04x %04x %04x %04x\n", snan, snan1[4], snan1[3], snan1[2], snan1[1], snan1[0]);
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if (fetestexcept(FE_INVALID) != FE_INVALID) {
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printf("[BAD]\tFE_INVALID is not set in %s\n", __func__);
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return 1;
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}
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return 0;
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}
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int testp(long flags)
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{
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feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
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asm ("\n"
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" push %0""\n"
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" popf""\n"
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" fld1""\n"
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" fldpi""\n"
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" fcomip %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" pushf""\n"
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" pop res_fcomi_1_pi""\n"
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" push %0""\n"
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" popf""\n"
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" fldpi""\n"
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" fld1""\n"
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" fcomip %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" pushf""\n"
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" pop res_fcomi_pi_1""\n"
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" push %0""\n"
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" popf""\n"
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" fld1""\n"
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" fld1""\n"
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" fcomip %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" pushf""\n"
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" pop res_fcomi_1_1""\n"
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:
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: "r" (flags)
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);
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if ((res_fcomi_1_pi & ARITH) != (0)) {
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printf("[BAD]\tfcomi_1_pi with flags:%lx\n", flags);
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return 1;
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}
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if ((res_fcomi_pi_1 & ARITH) != (CF)) {
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printf("[BAD]\tfcomi_pi_1 with flags:%lx->%lx\n", flags, res_fcomi_pi_1 & ARITH);
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return 1;
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}
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if ((res_fcomi_1_1 & ARITH) != (ZF)) {
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printf("[BAD]\tfcomi_1_1 with flags:%lx\n", flags);
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return 1;
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}
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if (fetestexcept(FE_INVALID) != 0) {
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printf("[BAD]\tFE_INVALID is set in %s\n", __func__);
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return 1;
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}
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return 0;
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}
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int testp_qnan(long flags)
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{
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feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
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asm ("\n"
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" push %0""\n"
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" popf""\n"
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" flds qnan""\n"
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" fld1""\n"
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" fnclex""\n" // fld of a qnan raised FE_INVALID, clear it
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" fcomip %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" pushf""\n"
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" pop res_fcomi_nan_1""\n"
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:
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: "r" (flags)
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);
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if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) {
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printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags);
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return 1;
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}
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if (fetestexcept(FE_INVALID) != FE_INVALID) {
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printf("[BAD]\tFE_INVALID is not set in %s\n", __func__);
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return 1;
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}
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return 0;
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}
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int testup_qnan(long flags)
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{
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feclearexcept(FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW);
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asm ("\n"
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" push %0""\n"
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" popf""\n"
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" flds qnan""\n"
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" fld1""\n"
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" fnclex""\n" // fld of a qnan raised FE_INVALID, clear it
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" fucomip %%st(1), %%st" "\n"
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" ffree %%st(0)" "\n"
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" pushf""\n"
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" pop res_fcomi_nan_1""\n"
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:
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: "r" (flags)
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);
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if ((res_fcomi_nan_1 & ARITH) != (ZF|CF|PF)) {
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printf("[BAD]\tfcomi_qnan_1 with flags:%lx\n", flags);
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return 1;
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}
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if (fetestexcept(FE_INVALID) != 0) {
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printf("[BAD]\tFE_INVALID is set in %s\n", __func__);
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return 1;
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}
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return 0;
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}
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void sighandler(int sig)
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{
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printf("[FAIL]\tGot signal %d, exiting\n", sig);
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exit(1);
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}
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int main(int argc, char **argv, char **envp)
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{
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int err = 0;
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/* SIGILL triggers on 32-bit kernels w/o fcomi emulation
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* when run with "no387 nofxsr". Other signals are caught
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* just in case.
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*/
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signal(SIGILL, sighandler);
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signal(SIGFPE, sighandler);
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signal(SIGSEGV, sighandler);
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printf("[RUN]\tTesting f[u]comi[p] instructions\n");
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err |= test(0);
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err |= test_qnan(0);
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err |= testu_qnan(0);
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err |= testu_snan(0);
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err |= test(CF|ZF|PF);
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err |= test_qnan(CF|ZF|PF);
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err |= testu_qnan(CF|ZF|PF);
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err |= testu_snan(CF|ZF|PF);
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err |= testp(0);
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err |= testp_qnan(0);
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err |= testup_qnan(0);
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err |= testp(CF|ZF|PF);
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err |= testp_qnan(CF|ZF|PF);
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err |= testup_qnan(CF|ZF|PF);
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if (!err)
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printf("[OK]\tf[u]comi[p]\n");
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else
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printf("[FAIL]\tf[u]comi[p] errors: %d\n", err);
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return err;
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}
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