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/*
* Copyright © 2015 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.
*/
/** @file brw_eu_validate.c
*
* This file implements a pass that validates shader assembly.
*/
#include "brw_eu.h"
/* We're going to do lots of string concatenation, so this should help. */
struct string {
char *str;
size_t len;
};
static void
cat(struct string *dest, const struct string src)
{
dest->str = realloc(dest->str, dest->len + src.len + 1);
memcpy(dest->str + dest->len, src.str, src.len);
dest->str[dest->len + src.len] = '\0';
dest->len = dest->len + src.len;
}
#define CAT(dest, src) cat(&dest, (struct string){src, strlen(src)})
#define error(str) "\tERROR: " str "\n"
#define ERROR_IF(cond, msg) \
do { \
if (cond) { \
CAT(error_msg, error(msg)); \
valid = false; \
} \
} while(0)
static bool
src0_is_null(const struct brw_device_info *devinfo, const brw_inst *inst)
{
return brw_inst_src0_reg_file(devinfo, inst) == BRW_ARCHITECTURE_REGISTER_FILE &&
brw_inst_src0_da_reg_nr(devinfo, inst) == BRW_ARF_NULL;
}
static bool
src1_is_null(const struct brw_device_info *devinfo, const brw_inst *inst)
{
return brw_inst_src1_reg_file(devinfo, inst) == BRW_ARCHITECTURE_REGISTER_FILE &&
brw_inst_src1_da_reg_nr(devinfo, inst) == BRW_ARF_NULL;
}
static bool
src0_is_grf(const struct brw_device_info *devinfo, const brw_inst *inst)
{
return brw_inst_src0_reg_file(devinfo, inst) == BRW_GENERAL_REGISTER_FILE;
}
static unsigned
num_sources_from_inst(const struct brw_device_info *devinfo,
const brw_inst *inst)
{
const struct opcode_desc *desc =
brw_opcode_desc(devinfo, brw_inst_opcode(devinfo, inst));
unsigned math_function;
if (brw_inst_opcode(devinfo, inst) == BRW_OPCODE_MATH) {
math_function = brw_inst_math_function(devinfo, inst);
} else if (devinfo->gen < 6 &&
brw_inst_opcode(devinfo, inst) == BRW_OPCODE_SEND) {
if (brw_inst_sfid(devinfo, inst) == BRW_SFID_MATH) {
math_function = brw_inst_math_msg_function(devinfo, inst);
} else {
/* Send instructions are allowed to have null sources since they use
* the base_mrf field to specify which message register source.
*/
return 0;
}
} else if (desc) {
return desc->nsrc;
} else {
return 0;
}
switch (math_function) {
case BRW_MATH_FUNCTION_INV:
case BRW_MATH_FUNCTION_LOG:
case BRW_MATH_FUNCTION_EXP:
case BRW_MATH_FUNCTION_SQRT:
case BRW_MATH_FUNCTION_RSQ:
case BRW_MATH_FUNCTION_SIN:
case BRW_MATH_FUNCTION_COS:
case BRW_MATH_FUNCTION_SINCOS:
case GEN8_MATH_FUNCTION_INVM:
case GEN8_MATH_FUNCTION_RSQRTM:
return 1;
case BRW_MATH_FUNCTION_FDIV:
case BRW_MATH_FUNCTION_POW:
case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER:
case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT:
case BRW_MATH_FUNCTION_INT_DIV_REMAINDER:
return 2;
default:
unreachable("not reached");
}
}
static bool
is_unsupported_inst(const struct brw_device_info *devinfo,
const brw_inst *inst)
{
return brw_opcode_desc(devinfo, brw_inst_opcode(devinfo, inst)) == NULL;
}
bool
brw_validate_instructions(const struct brw_codegen *p, int start_offset,
struct annotation_info *annotation)
{
const struct brw_device_info *devinfo = p->devinfo;
const void *store = p->store + start_offset / 16;
bool valid = true;
for (int src_offset = 0; src_offset < p->next_insn_offset - start_offset;
src_offset += sizeof(brw_inst)) {
struct string error_msg = { .str = NULL, .len = 0 };
const brw_inst *inst = store + src_offset;
switch (num_sources_from_inst(devinfo, inst)) {
case 3:
/* Nothing to test. 3-src instructions can only have GRF sources, and
* there's no bit to control the file.
*/
break;
case 2:
ERROR_IF(src1_is_null(devinfo, inst), "src1 is null");
/* fallthrough */
case 1:
ERROR_IF(src0_is_null(devinfo, inst), "src0 is null");
break;
case 0:
default:
break;
}
ERROR_IF(is_unsupported_inst(devinfo, inst),
"Instruction not supported on this Gen");
if (brw_inst_opcode(devinfo, inst) == BRW_OPCODE_SEND) {
ERROR_IF(brw_inst_src0_address_mode(devinfo, inst) !=
BRW_ADDRESS_DIRECT, "send must use direct addressing");
if (devinfo->gen >= 7) {
ERROR_IF(!src0_is_grf(devinfo, inst), "send from non-GRF");
ERROR_IF(brw_inst_eot(devinfo, inst) &&
brw_inst_src0_da_reg_nr(devinfo, inst) < 112,
"send with EOT must use g112-g127");
}
}
if (error_msg.str && annotation) {
annotation_insert_error(annotation, src_offset, error_msg.str);
}
free(error_msg.str);
}
return valid;
}
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