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Diffstat (limited to 'tests/tcg/hexagon/overflow.c')
| -rw-r--r-- | tests/tcg/hexagon/overflow.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/tests/tcg/hexagon/overflow.c b/tests/tcg/hexagon/overflow.c new file mode 100644 index 0000000000..7b5b9ebdde --- /dev/null +++ b/tests/tcg/hexagon/overflow.c @@ -0,0 +1,157 @@ +/* + * Copyright(c) 2021-2023 Qualcomm Innovation Center, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> +#include <stdio.h> +#include <stdint.h> +#include <unistd.h> +#include <sys/types.h> +#include <fcntl.h> +#include <setjmp.h> +#include <signal.h> + +int err; + +#include "hex_test.h" + +static int32_t satub(int32_t src, int32_t *p, bool *ovf_result) +{ + int32_t result; + uint32_t usr; + + /* + * This instruction can set bit 0 (OVF/overflow) in usr + * Clear the bit first, then return that bit to the caller + * + * We also store the src into *p in the same packet, so we + * can ensure the overflow doesn't get set when an exception + * is generated. + */ + asm volatile("r2 = usr\n\t" + "r2 = clrbit(r2, #0)\n\t" /* clear overflow bit */ + "usr = r2\n\t" + "{\n\t" + " %0 = satub(%2)\n\t" + " memw(%3) = %2\n\t" + "}\n\t" + "%1 = usr\n\t" + : "=r"(result), "=r"(usr) + : "r"(src), "r"(p) + : "r2", "usr", "memory"); + *ovf_result = (usr & 1); + return result; +} + +bool read_usr_overflow(void) +{ + uint32_t usr; + asm volatile("%0 = usr\n\t" : "=r"(usr)); + return usr & 1; +} + +bool get_usr_overflow(uint32_t usr) +{ + return usr & 1; +} + +bool get_usr_fp_invalid(uint32_t usr) +{ + return (usr >> 1) & 1; +} + +int32_t get_usr_lpcfg(uint32_t usr) +{ + return (usr >> 8) & 0x3; +} + +jmp_buf jmp_env; +bool usr_overflow; + +static void sig_segv(int sig, siginfo_t *info, void *puc) +{ + usr_overflow = read_usr_overflow(); + longjmp(jmp_env, 1); +} + +static void test_packet(void) +{ + int32_t convres; + int32_t satres; + uint32_t usr; + + asm("r2 = usr\n\t" + "r2 = clrbit(r2, #0)\n\t" /* clear overflow bit */ + "r2 = clrbit(r2, #1)\n\t" /* clear FP invalid bit */ + "usr = r2\n\t" + "{\n\t" + " %0 = convert_sf2uw(%3):chop\n\t" + " %1 = satb(%4)\n\t" + "}\n\t" + "%2 = usr\n\t" + : "=r"(convres), "=r"(satres), "=r"(usr) + : "r"(0x6a051b86), "r"(0x0410eec0) + : "r2", "usr"); + + check32(convres, 0xffffffff); + check32(satres, 0x7f); + check32(get_usr_overflow(usr), true); + check32(get_usr_fp_invalid(usr), true); + + asm("r2 = usr\n\t" + "r2 = clrbit(r2, #0)\n\t" /* clear overflow bit */ + "usr = r2\n\t" + "%2 = r2\n\t" + "p3 = sp3loop0(1f, #1)\n\t" + "1:\n\t" + "{\n\t" + " %0 = satb(%2)\n\t" + "}:endloop0\n\t" + "%1 = usr\n\t" + : "=r"(satres), "=r"(usr) + : "r"(0x0410eec0) + : "r2", "usr", "p3", "sa0", "lc0"); + + check32(satres, 0x7f); + check32(get_usr_overflow(usr), true); + check32(get_usr_lpcfg(usr), 2); +} + +int main() +{ + struct sigaction act; + bool ovf; + + /* SIGSEGV test */ + act.sa_sigaction = sig_segv; + sigemptyset(&act.sa_mask); + act.sa_flags = SA_SIGINFO; + sigaction(SIGSEGV, &act, NULL); + if (setjmp(jmp_env) == 0) { + satub(300, 0, &ovf); + } + + act.sa_handler = SIG_DFL; + sigemptyset(&act.sa_mask); + act.sa_flags = 0; + + check32(usr_overflow, false); + + test_packet(); + + puts(err ? "FAIL" : "PASS"); + return err ? EXIT_FAILURE : EXIT_SUCCESS; +} |