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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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0d0e6346db
The tester is located in memcheck/tests/vbit-test.
It needs the following support on the valgrind / VEX side:
(1) a new client request VG_USERREQ__VEX_INIT_FOR_IRI
(2) a new "special instruction" on all architectures inserted via
VALGRIND_VEX_INJECT_IR
(3) VEX changes to detect the special insn and insert IR (ir_inject.c)
The README file in vbit-test has some more information.
See also VEX r2490. Fixes bugzilla #300102.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12906
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/* -*- mode: C; c-basic-offset: 3; -*- */
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#include <assert.h>
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#include "vtest.h"
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/* Check the result of a quarternary operation. */
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static void
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check_result_for_qernary(const irop_t *op, const test_data_t *data)
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{
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const opnd_t *result = &data->result;
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const opnd_t *opnd1 = &data->opnds[0];
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const opnd_t *opnd2 = &data->opnds[1];
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const opnd_t *opnd3 = &data->opnds[2];
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const opnd_t *opnd4 = &data->opnds[3];
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vbits_t expected_vbits;
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/* Only handle those undef-kinds that actually occur. */
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switch (op->undef_kind) {
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case UNDEF_ALL:
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expected_vbits = undefined_vbits(result->vbits.num_bits);
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break;
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case UNDEF_SAME:
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// SAME with respect to the 1-bits in all operands
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expected_vbits = or_vbits(or_vbits(or_vbits(opnd1->vbits, opnd2->vbits),
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opnd3->vbits), opnd4->vbits);
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break;
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default:
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panic(__func__);
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}
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if (! equal_vbits(result->vbits, expected_vbits))
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complain(op, data, expected_vbits);
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}
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void
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test_qernary_op(const irop_t *op, test_data_t *data)
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{
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unsigned num_input_bits, i, bitpos;
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opnd_t *opnds = data->opnds;
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/* For each operand, set a single bit to undefined and observe how
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that propagates to the output. Do this for all bits in each
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operand. */
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for (i = 0; i < 4; ++i) {
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num_input_bits = bitsof_irtype(opnds[i].type);
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opnds[0].vbits = defined_vbits(bitsof_irtype(opnds[0].type));
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opnds[1].vbits = defined_vbits(bitsof_irtype(opnds[1].type));
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opnds[2].vbits = defined_vbits(bitsof_irtype(opnds[2].type));
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opnds[3].vbits = defined_vbits(bitsof_irtype(opnds[3].type));
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for (bitpos = 0; bitpos < num_input_bits; ++bitpos) {
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opnds[i].vbits = onehot_vbits(bitpos, bitsof_irtype(opnds[i].type));
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valgrind_execute_test(op, data);
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check_result_for_qernary(op, data);
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}
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}
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}
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