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/*
* Copyright (C) 2020 Collabora, Ltd.
*
* 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.
*/
#ifndef __BI_PACK_HELPERS_H
#define __BI_PACK_HELPERS_H
/* Helpers used by the autogenerated packing routines */
#include "compiler.h"
static inline void
bi_set_staging_register(bi_clause *clause, unsigned idx)
{
assert(idx & BIR_INDEX_REGISTER);
unsigned reg = idx & ~BIR_INDEX_REGISTER;
assert(reg <= 63);
clause->staging_register = reg;
}
static inline void
bi_read_staging_register(bi_clause *clause, bi_instruction *ins)
{
bi_set_staging_register(clause, ins->src[0]);
}
static inline void
bi_write_staging_register(bi_clause *clause, bi_instruction *ins)
{
bi_set_staging_register(clause, ins->dest);
}
static inline enum bifrost_packed_src
bi_get_src_reg_slot(bi_registers *regs, unsigned src)
{
unsigned reg = src & ~BIR_INDEX_REGISTER;
if (regs->slot[0] == reg && regs->enabled[0])
return BIFROST_SRC_PORT0;
else if (regs->slot[1] == reg && regs->enabled[1])
return BIFROST_SRC_PORT1;
else if (regs->slot[2] == reg && regs->slot23.slot2 == BIFROST_OP_READ)
return BIFROST_SRC_PORT2;
else
unreachable("Tried to access register with no port");
}
/* Sources are usually strictly required, but in a few special cases they can
* be made optional with the value passed arbitrary. Check that here */
static bool
bi_src_nullable(bi_instruction *ins, unsigned s)
{
/* Z/S flags inferred */
if (ins->type == BI_ZS_EMIT && s < 2)
return true;
return false;
}
static inline enum bifrost_packed_src
bi_get_src(bi_instruction *ins, bi_registers *regs, unsigned s)
{
unsigned src = ins->src[s];
if (src & BIR_INDEX_REGISTER)
return bi_get_src_reg_slot(regs, src);
else if (src & BIR_INDEX_PASS)
return src & ~BIR_INDEX_PASS;
else if (!src && bi_src_nullable(ins, s))
return BIFROST_SRC_STAGE;
else {
#ifndef NDEBUG
bi_print_instruction(ins, stderr);
#endif
unreachable("Unknown src in above instruction");
}
}
#endif
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