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/* -*- mode: C; c-basic-offset: 3; -*- */
/*
This file is part of MemCheck, a heavyweight Valgrind tool for
detecting memory errors.
Copyright (C) 2012-2017 Florian Krohm
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/>.
The GNU General Public License is contained in the file COPYING.
*/
#include <assert.h>
#include "vtest.h"
/* Check the result of a ternary operation. */
static void
check_result_for_ternary(const irop_t *op, const test_data_t *data)
{
const opnd_t *result = &data->result;
const opnd_t *opnd1 = &data->opnds[0];
const opnd_t *opnd2 = &data->opnds[1];
const opnd_t *opnd3 = &data->opnds[2];
vbits_t expected_vbits;
/* Only handle those undef-kinds that actually occur. */
switch (op->undef_kind) {
case UNDEF_ALL:
expected_vbits = undefined_vbits(result->vbits.num_bits);
break;
case UNDEF_SAME:
// SAME with respect to the 1-bits in all operands
expected_vbits = or_vbits(or_vbits(opnd1->vbits, opnd2->vbits),
opnd3->vbits);
break;
case UNDEF_SOME:
expected_vbits.num_bits = result->vbits.num_bits;
if ((result->vbits.bits.u128[0] != 0) ||
(result->vbits.bits.u128[1] != 0)) {
expected_vbits.bits.u128[0] = result->vbits.bits.u128[0];
expected_vbits.bits.u128[1] = result->vbits.bits.u128[1];
} else {
/* The input had at least one vbit set but the result doesn't have any
* bit set. Set them all so we will trigger the error on the call
* to complain().
*/
expected_vbits.bits.u128[0] = ~0x0ULL;
expected_vbits.bits.u128[1] = ~0x0ULL;
}
break;
default:
panic(__func__);
}
if (! equal_vbits(result->vbits, expected_vbits))
complain(op, data, expected_vbits);
}
int
test_ternary_op(const irop_t *op, test_data_t *data)
{
unsigned num_input_bits, i, bitpos;
opnd_t *opnds = data->opnds;
int tests_done = 0;
/* For each operand, set a single bit to undefined and observe how
that propagates to the output. Do this for all bits in each
operand. */
for (i = 0; i < 3; ++i) {
num_input_bits = bitsof_irtype(opnds[i].type);
opnds[0].vbits = defined_vbits(bitsof_irtype(opnds[0].type));
opnds[1].vbits = defined_vbits(bitsof_irtype(opnds[1].type));
opnds[2].vbits = defined_vbits(bitsof_irtype(opnds[2].type));
for (bitpos = 0; bitpos < num_input_bits; ++bitpos) {
opnds[i].vbits = onehot_vbits(bitpos, bitsof_irtype(opnds[i].type));
valgrind_execute_test(op, data);
check_result_for_ternary(op, data);
tests_done++;
}
}
return tests_done;
}
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