| /* |
| * Copyright © 2012 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <stdbool.h> |
| #include "util/ralloc.h" |
| #include "brw_eu.h" |
| |
| static bool |
| test_compact_instruction(struct brw_codegen *p, brw_inst src) |
| { |
| brw_compact_inst dst; |
| memset(&dst, 0xd0, sizeof(dst)); |
| |
| if (brw_try_compact_instruction(p->devinfo, &dst, &src)) { |
| brw_inst uncompacted; |
| |
| brw_uncompact_instruction(p->devinfo, &uncompacted, &dst); |
| if (memcmp(&uncompacted, &src, sizeof(src))) { |
| brw_debug_compact_uncompact(p->devinfo, &src, &uncompacted); |
| return false; |
| } |
| } else { |
| brw_compact_inst unchanged; |
| memset(&unchanged, 0xd0, sizeof(unchanged)); |
| /* It's not supposed to change dst unless it compacted. */ |
| if (memcmp(&unchanged, &dst, sizeof(dst))) { |
| fprintf(stderr, "Failed to compact, but dst changed\n"); |
| fprintf(stderr, " Instruction: "); |
| brw_disassemble_inst(stderr, p->devinfo, &src, false); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| /** |
| * When doing fuzz testing, pad bits won't round-trip. |
| * |
| * This sort of a superset of skip_bit, which is testing for changing bits that |
| * aren't worth testing for fuzzing. We also just want to clear bits that |
| * become meaningless once fuzzing twiddles a related bit. |
| */ |
| static void |
| clear_pad_bits(const struct gen_device_info *devinfo, brw_inst *inst) |
| { |
| if (brw_inst_opcode(devinfo, inst) != BRW_OPCODE_SEND && |
| brw_inst_opcode(devinfo, inst) != BRW_OPCODE_SENDC && |
| brw_inst_src0_reg_file(devinfo, inst) != BRW_IMMEDIATE_VALUE && |
| brw_inst_src1_reg_file(devinfo, inst) != BRW_IMMEDIATE_VALUE) { |
| brw_inst_set_bits(inst, 127, 111, 0); |
| } |
| |
| if (devinfo->gen == 8 && !devinfo->is_cherryview && |
| is_3src(devinfo, (opcode)brw_inst_opcode(devinfo, inst))) { |
| brw_inst_set_bits(inst, 105, 105, 0); |
| brw_inst_set_bits(inst, 84, 84, 0); |
| brw_inst_set_bits(inst, 36, 35, 0); |
| } |
| } |
| |
| static bool |
| skip_bit(const struct gen_device_info *devinfo, brw_inst *src, int bit) |
| { |
| /* pad bit */ |
| if (bit == 7) |
| return true; |
| |
| /* The compact bit -- uncompacted can't have it set. */ |
| if (bit == 29) |
| return true; |
| |
| if (is_3src(devinfo, (opcode)brw_inst_opcode(devinfo, src))) { |
| if (devinfo->gen >= 9 || devinfo->is_cherryview) { |
| if (bit == 127) |
| return true; |
| } else { |
| if (bit >= 126 && bit <= 127) |
| return true; |
| |
| if (bit == 105) |
| return true; |
| |
| if (bit == 84) |
| return true; |
| |
| if (bit >= 35 && bit <= 36) |
| return true; |
| } |
| } else { |
| if (bit == 47) |
| return true; |
| |
| if (devinfo->gen >= 8) { |
| if (bit == 11) |
| return true; |
| |
| if (bit == 95) |
| return true; |
| } else { |
| if (devinfo->gen < 7 && bit == 90) |
| return true; |
| |
| if (bit >= 91 && bit <= 95) |
| return true; |
| } |
| } |
| |
| /* sometimes these are pad bits. */ |
| if (brw_inst_opcode(devinfo, src) != BRW_OPCODE_SEND && |
| brw_inst_opcode(devinfo, src) != BRW_OPCODE_SENDC && |
| brw_inst_src0_reg_file(devinfo, src) != BRW_IMMEDIATE_VALUE && |
| brw_inst_src1_reg_file(devinfo, src) != BRW_IMMEDIATE_VALUE && |
| bit >= 121) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool |
| test_fuzz_compact_instruction(struct brw_codegen *p, brw_inst src) |
| { |
| for (int bit0 = 0; bit0 < 128; bit0++) { |
| if (skip_bit(p->devinfo, &src, bit0)) |
| continue; |
| |
| for (int bit1 = 0; bit1 < 128; bit1++) { |
| brw_inst instr = src; |
| uint64_t *bits = instr.data; |
| |
| if (skip_bit(p->devinfo, &src, bit1)) |
| continue; |
| |
| bits[bit0 / 64] ^= (1ull << (bit0 & 63)); |
| bits[bit1 / 64] ^= (1ull << (bit1 & 63)); |
| |
| clear_pad_bits(p->devinfo, &instr); |
| |
| if (!test_compact_instruction(p, instr)) { |
| printf(" twiddled bits for fuzzing %d, %d\n", bit0, bit1); |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| static void |
| gen_ADD_GRF_GRF_GRF(struct brw_codegen *p) |
| { |
| struct brw_reg g0 = brw_vec8_grf(0, 0); |
| struct brw_reg g2 = brw_vec8_grf(2, 0); |
| struct brw_reg g4 = brw_vec8_grf(4, 0); |
| |
| brw_ADD(p, g0, g2, g4); |
| } |
| |
| static void |
| gen_ADD_GRF_GRF_IMM(struct brw_codegen *p) |
| { |
| struct brw_reg g0 = brw_vec8_grf(0, 0); |
| struct brw_reg g2 = brw_vec8_grf(2, 0); |
| |
| brw_ADD(p, g0, g2, brw_imm_f(1.0)); |
| } |
| |
| static void |
| gen_ADD_GRF_GRF_IMM_d(struct brw_codegen *p) |
| { |
| struct brw_reg g0 = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_D); |
| struct brw_reg g2 = retype(brw_vec8_grf(2, 0), BRW_REGISTER_TYPE_D); |
| |
| brw_ADD(p, g0, g2, brw_imm_d(1)); |
| } |
| |
| static void |
| gen_MOV_GRF_GRF(struct brw_codegen *p) |
| { |
| struct brw_reg g0 = brw_vec8_grf(0, 0); |
| struct brw_reg g2 = brw_vec8_grf(2, 0); |
| |
| brw_MOV(p, g0, g2); |
| } |
| |
| static void |
| gen_ADD_MRF_GRF_GRF(struct brw_codegen *p) |
| { |
| struct brw_reg m6 = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 6, 0); |
| struct brw_reg g2 = brw_vec8_grf(2, 0); |
| struct brw_reg g4 = brw_vec8_grf(4, 0); |
| |
| brw_ADD(p, m6, g2, g4); |
| } |
| |
| static void |
| gen_ADD_vec1_GRF_GRF_GRF(struct brw_codegen *p) |
| { |
| struct brw_reg g0 = brw_vec1_grf(0, 0); |
| struct brw_reg g2 = brw_vec1_grf(2, 0); |
| struct brw_reg g4 = brw_vec1_grf(4, 0); |
| |
| brw_ADD(p, g0, g2, g4); |
| } |
| |
| static void |
| gen_PLN_MRF_GRF_GRF(struct brw_codegen *p) |
| { |
| struct brw_reg m6 = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 6, 0); |
| struct brw_reg interp = brw_vec1_grf(2, 0); |
| struct brw_reg g4 = brw_vec8_grf(4, 0); |
| |
| brw_PLN(p, m6, interp, g4); |
| } |
| |
| static void |
| gen_f0_0_MOV_GRF_GRF(struct brw_codegen *p) |
| { |
| struct brw_reg g0 = brw_vec8_grf(0, 0); |
| struct brw_reg g2 = brw_vec8_grf(2, 0); |
| |
| brw_push_insn_state(p); |
| brw_set_default_predicate_control(p, true); |
| brw_MOV(p, g0, g2); |
| brw_pop_insn_state(p); |
| } |
| |
| /* The handling of f0.1 vs f0.0 changes between gen6 and gen7. Explicitly test |
| * it, so that we run the fuzzing can run over all the other bits that might |
| * interact with it. |
| */ |
| static void |
| gen_f0_1_MOV_GRF_GRF(struct brw_codegen *p) |
| { |
| struct brw_reg g0 = brw_vec8_grf(0, 0); |
| struct brw_reg g2 = brw_vec8_grf(2, 0); |
| |
| brw_push_insn_state(p); |
| brw_set_default_predicate_control(p, true); |
| brw_inst *mov = brw_MOV(p, g0, g2); |
| brw_inst_set_flag_subreg_nr(p->devinfo, mov, 1); |
| brw_pop_insn_state(p); |
| } |
| |
| struct { |
| void (*func)(struct brw_codegen *p); |
| } tests[] = { |
| { gen_MOV_GRF_GRF }, |
| { gen_ADD_GRF_GRF_GRF }, |
| { gen_ADD_GRF_GRF_IMM }, |
| { gen_ADD_GRF_GRF_IMM_d }, |
| { gen_ADD_MRF_GRF_GRF }, |
| { gen_ADD_vec1_GRF_GRF_GRF }, |
| { gen_PLN_MRF_GRF_GRF }, |
| { gen_f0_0_MOV_GRF_GRF }, |
| { gen_f0_1_MOV_GRF_GRF }, |
| }; |
| |
| static bool |
| run_tests(const struct gen_device_info *devinfo) |
| { |
| brw_init_compaction_tables(devinfo); |
| bool fail = false; |
| |
| for (unsigned i = 0; i < ARRAY_SIZE(tests); i++) { |
| for (int align_16 = 0; align_16 <= 1; align_16++) { |
| struct brw_codegen *p = rzalloc(NULL, struct brw_codegen); |
| brw_init_codegen(devinfo, p, p); |
| |
| brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); |
| if (align_16) |
| brw_set_default_access_mode(p, BRW_ALIGN_16); |
| else |
| brw_set_default_access_mode(p, BRW_ALIGN_1); |
| |
| tests[i].func(p); |
| assert(p->nr_insn == 1); |
| |
| if (!test_compact_instruction(p, p->store[0])) { |
| fail = true; |
| continue; |
| } |
| |
| if (!test_fuzz_compact_instruction(p, p->store[0])) { |
| fail = true; |
| continue; |
| } |
| |
| ralloc_free(p); |
| } |
| } |
| |
| return fail; |
| } |
| |
| int |
| main(int argc, char **argv) |
| { |
| struct gen_device_info *devinfo = (struct gen_device_info *)calloc(1, sizeof(*devinfo)); |
| bool fail = false; |
| |
| for (devinfo->gen = 5; devinfo->gen <= 9; devinfo->gen++) { |
| fail |= run_tests(devinfo); |
| } |
| |
| return fail; |
| } |