1/*
2 * Copyright © 2018 Intel Corporation
3 * Copyright © 2021 Valve Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25#include <gtest/gtest.h>
26
27#include "nir.h"
28#include "nir_builder.h"
29
30namespace {
31
32class algebraic_test_base : public ::testing::Test {
33protected:
34   algebraic_test_base();
35   ~algebraic_test_base();
36
37   virtual void run_pass()=0;
38
39   void test_op(nir_op op, nir_ssa_def *src0, nir_ssa_def *src1, nir_ssa_def *src2,
40                nir_ssa_def *src3, const char *desc);
41
42   void test_2src_op(nir_op op, int64_t src0, int64_t src1);
43
44   nir_variable *res_var;
45   nir_builder *b, _b;
46};
47
48algebraic_test_base::algebraic_test_base()
49{
50   glsl_type_singleton_init_or_ref();
51
52   static const nir_shader_compiler_options options = { };
53   _b = nir_builder_init_simple_shader(MESA_SHADER_COMPUTE, &options, "opt_algebraic test");
54   b = &_b;
55
56   res_var = nir_local_variable_create(b->impl, glsl_int_type(), "res");
57}
58
59algebraic_test_base::~algebraic_test_base()
60{
61   ralloc_free(b->shader);
62
63   glsl_type_singleton_decref();
64}
65
66void algebraic_test_base::test_op(nir_op op, nir_ssa_def *src0, nir_ssa_def *src1,
67                                     nir_ssa_def *src2, nir_ssa_def *src3, const char *desc)
68{
69   nir_ssa_def *res_deref = &nir_build_deref_var(b, res_var)->dest.ssa;
70
71   /* create optimized expression */
72   nir_intrinsic_instr *optimized_instr = nir_build_store_deref(
73      b, res_deref, nir_build_alu(b, op, src0, src1, src2, src3), 0x1);
74
75   run_pass();
76   b->cursor = nir_after_cf_list(&b->impl->body);
77
78   /* create reference expression */
79   nir_intrinsic_instr *ref_instr = nir_build_store_deref(
80      b, res_deref, nir_build_alu(b, op, src0, src1, src2, src3), 0x1);
81
82   /* test equality */
83   nir_opt_constant_folding(b->shader);
84
85   ASSERT_TRUE(nir_src_is_const(ref_instr->src[1]));
86   ASSERT_TRUE(nir_src_is_const(optimized_instr->src[1]));
87
88   int32_t ref = nir_src_as_int(ref_instr->src[1]);
89   int32_t optimized = nir_src_as_int(optimized_instr->src[1]);
90
91   EXPECT_EQ(ref, optimized) << "Test input: " << desc;
92
93   /* reset shader */
94   exec_list_make_empty(&nir_start_block(b->impl)->instr_list);
95   b->cursor = nir_after_cf_list(&b->impl->body);
96}
97
98void algebraic_test_base::test_2src_op(nir_op op, int64_t src0, int64_t src1)
99{
100   char desc[128];
101   snprintf(desc, sizeof(desc), "%s(%" PRId64 ", %" PRId64 ")", nir_op_infos[op].name, src0, src1);
102   test_op(op, nir_imm_int(b, src0), nir_imm_int(b, src1), NULL, NULL, desc);
103}
104
105class nir_opt_algebraic_test : public algebraic_test_base {
106protected:
107   virtual void run_pass() {
108      nir_opt_algebraic(b->shader);
109   }
110};
111
112class nir_opt_idiv_const_test : public algebraic_test_base {
113protected:
114   virtual void run_pass() {
115      nir_opt_idiv_const(b->shader, 8);
116   }
117};
118
119TEST_F(nir_opt_algebraic_test, umod_pow2_src2)
120{
121   for (int i = 0; i <= 9; i++)
122      test_2src_op(nir_op_umod, i, 4);
123   test_2src_op(nir_op_umod, UINT32_MAX, 4);
124}
125
126TEST_F(nir_opt_algebraic_test, imod_pow2_src2)
127{
128   for (int i = -9; i <= 9; i++) {
129      test_2src_op(nir_op_imod, i, 4);
130      test_2src_op(nir_op_imod, i, -4);
131      test_2src_op(nir_op_imod, i, INT32_MIN);
132   }
133   test_2src_op(nir_op_imod, INT32_MAX, 4);
134   test_2src_op(nir_op_imod, INT32_MAX, -4);
135   test_2src_op(nir_op_imod, INT32_MIN, 4);
136   test_2src_op(nir_op_imod, INT32_MIN, -4);
137   test_2src_op(nir_op_imod, INT32_MIN, INT32_MIN);
138}
139
140TEST_F(nir_opt_algebraic_test, irem_pow2_src2)
141{
142   for (int i = -9; i <= 9; i++) {
143      test_2src_op(nir_op_irem, i, 4);
144      test_2src_op(nir_op_irem, i, -4);
145   }
146   test_2src_op(nir_op_irem, INT32_MAX, 4);
147   test_2src_op(nir_op_irem, INT32_MAX, -4);
148   test_2src_op(nir_op_irem, INT32_MIN, 4);
149   test_2src_op(nir_op_irem, INT32_MIN, -4);
150}
151
152TEST_F(nir_opt_idiv_const_test, umod)
153{
154   for (uint32_t d : {16u, 17u, 0u, UINT32_MAX}) {
155      for (int i = 0; i <= 40; i++)
156         test_2src_op(nir_op_umod, i, d);
157      for (int i = 0; i < 20; i++)
158         test_2src_op(nir_op_umod, UINT32_MAX - i, d);
159   }
160}
161
162TEST_F(nir_opt_idiv_const_test, imod)
163{
164   for (int32_t d : {16, -16, 17, -17, 0, INT32_MIN, INT32_MAX}) {
165      for (int i = -40; i <= 40; i++)
166         test_2src_op(nir_op_imod, i, d);
167      for (int i = 0; i < 20; i++)
168         test_2src_op(nir_op_imod, INT32_MIN + i, d);
169      for (int i = 0; i < 20; i++)
170         test_2src_op(nir_op_imod, INT32_MAX - i, d);
171   }
172}
173
174TEST_F(nir_opt_idiv_const_test, irem)
175{
176   for (int32_t d : {16, -16, 17, -17, 0, INT32_MIN, INT32_MAX}) {
177      for (int i = -40; i <= 40; i++)
178         test_2src_op(nir_op_irem, i, d);
179      for (int i = 0; i < 20; i++)
180         test_2src_op(nir_op_irem, INT32_MIN + i, d);
181      for (int i = 0; i < 20; i++)
182         test_2src_op(nir_op_irem, INT32_MAX - i, d);
183   }
184}
185
186}
187