| 0,0 → 1,306 |
|---|
| /* |
| * 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 "glsl/ralloc.h" |
| #include "brw_context.h" |
| #include "brw_eu.h" |
| |
| static bool |
| test_compact_instruction(struct brw_compile *p, struct brw_instruction src) |
| { |
| struct brw_context *brw = p->brw; |
| |
| struct brw_compact_instruction dst; |
| memset(&dst, 0xd0, sizeof(dst)); |
| |
| if (brw_try_compact_instruction(p, &dst, &src)) { |
| struct brw_instruction uncompacted; |
| |
| brw_uncompact_instruction(brw, &uncompacted, &dst); |
| if (memcmp(&uncompacted, &src, sizeof(src))) { |
| brw_debug_compact_uncompact(brw, &src, &uncompacted); |
| return false; |
| } |
| } else { |
| struct brw_compact_instruction 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_disasm(stderr, &src, brw->gen); |
| 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(struct brw_instruction *inst) |
| { |
| if (inst->header.opcode != BRW_OPCODE_SEND && |
| inst->header.opcode != BRW_OPCODE_SENDC && |
| inst->header.opcode != BRW_OPCODE_BREAK && |
| inst->header.opcode != BRW_OPCODE_CONTINUE && |
| inst->bits1.da1.src0_reg_file != BRW_IMMEDIATE_VALUE && |
| inst->bits1.da1.src1_reg_file != BRW_IMMEDIATE_VALUE) { |
| if (inst->bits3.da1.src1_address_mode) |
| inst->bits3.ia1.pad1 = 0; |
| else |
| inst->bits3.da1.pad0 = 0; |
| } |
| } |
| |
| static bool |
| skip_bit(struct brw_instruction *src, int bit) |
| { |
| /* pad bit */ |
| if (bit == 7) |
| return true; |
| |
| /* The compact bit -- uncompacted can't have it set. */ |
| if (bit == 29) |
| return true; |
| |
| /* pad bit */ |
| if (bit == 47) |
| return true; |
| |
| /* pad bits */ |
| if (bit >= 90 && bit <= 95) |
| return true; |
| |
| /* sometimes these are pad bits. */ |
| if (src->header.opcode != BRW_OPCODE_SEND && |
| src->header.opcode != BRW_OPCODE_SENDC && |
| src->header.opcode != BRW_OPCODE_BREAK && |
| src->header.opcode != BRW_OPCODE_CONTINUE && |
| src->bits1.da1.src0_reg_file != BRW_IMMEDIATE_VALUE && |
| src->bits1.da1.src1_reg_file != BRW_IMMEDIATE_VALUE && |
| bit >= 121) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool |
| test_fuzz_compact_instruction(struct brw_compile *p, |
| struct brw_instruction src) |
| { |
| for (int bit0 = 0; bit0 < 128; bit0++) { |
| if (skip_bit(&src, bit0)) |
| continue; |
| |
| for (int bit1 = 0; bit1 < 128; bit1++) { |
| struct brw_instruction instr = src; |
| uint32_t *bits = (uint32_t *)&instr; |
| |
| if (skip_bit(&src, bit1)) |
| continue; |
| |
| bits[bit0 / 32] ^= (1 << (bit0 & 31)); |
| bits[bit1 / 32] ^= (1 << (bit1 & 31)); |
| |
| clear_pad_bits(&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_compile *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_compile *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_compile *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_compile *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_compile *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_compile *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_compile *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_compile *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_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_compile *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_predicate_control(p, true); |
| current_insn(p)->bits2.da1.flag_subreg_nr = 1; |
| brw_MOV(p, g0, g2); |
| brw_pop_insn_state(p); |
| } |
| |
| struct { |
| void (*func)(struct brw_compile *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(struct brw_context *brw) |
| { |
| bool fail = false; |
| |
| for (int i = 0; i < ARRAY_SIZE(tests); i++) { |
| for (int align_16 = 0; align_16 <= 1; align_16++) { |
| struct brw_compile *p = rzalloc(NULL, struct brw_compile); |
| brw_init_compile(brw, p, p); |
| |
| brw_set_predicate_control(p, BRW_PREDICATE_NONE); |
| if (align_16) |
| brw_set_access_mode(p, BRW_ALIGN_16); |
| else |
| brw_set_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 brw_context *brw = calloc(1, sizeof(*brw)); |
| brw->gen = 6; |
| bool fail = false; |
| |
| for (brw->gen = 6; brw->gen <= 7; brw->gen++) { |
| fail |= run_tests(brw); |
| } |
| |
| return fail; |
| } |