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/*
* Copyright © 2016 Red Hat
*
* 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.
*
* Authors:
* Rob Clark <robclark@freedesktop.org>
*/
#ifndef _NIR_SEARCH_HELPERS_
#define _NIR_SEARCH_HELPERS_
#include "nir.h"
#include "util/bitscan.h"
#include <math.h>
static inline bool
is_pos_power_of_two(nir_alu_instr *instr, unsigned src, unsigned num_components,
const uint8_t *swizzle)
{
/* only constant srcs: */
if (!nir_src_is_const(instr->src[src].src))
return false;
for (unsigned i = 0; i < num_components; i++) {
switch (nir_op_infos[instr->op].input_types[src]) {
case nir_type_int: {
int64_t val = nir_src_comp_as_int(instr->src[src].src, swizzle[i]);
if (val <= 0 || !util_is_power_of_two_or_zero64(val))
return false;
break;
}
case nir_type_uint: {
uint64_t val = nir_src_comp_as_uint(instr->src[src].src, swizzle[i]);
if (val == 0 || !util_is_power_of_two_or_zero64(val))
return false;
break;
}
default:
return false;
}
}
return true;
}
static inline bool
is_neg_power_of_two(nir_alu_instr *instr, unsigned src, unsigned num_components,
const uint8_t *swizzle)
{
/* only constant srcs: */
if (!nir_src_is_const(instr->src[src].src))
return false;
for (unsigned i = 0; i < num_components; i++) {
switch (nir_op_infos[instr->op].input_types[src]) {
case nir_type_int: {
int64_t val = nir_src_comp_as_int(instr->src[src].src, swizzle[i]);
if (val >= 0 || !util_is_power_of_two_or_zero64(-val))
return false;
break;
}
default:
return false;
}
}
return true;
}
static inline bool
is_zero_to_one(nir_alu_instr *instr, unsigned src, unsigned num_components,
const uint8_t *swizzle)
{
/* only constant srcs: */
if (!nir_src_is_const(instr->src[src].src))
return false;
for (unsigned i = 0; i < num_components; i++) {
switch (nir_op_infos[instr->op].input_types[src]) {
case nir_type_float: {
double val = nir_src_comp_as_float(instr->src[src].src, swizzle[i]);
if (isnan(val) || val < 0.0f || val > 1.0f)
return false;
break;
}
default:
return false;
}
}
return true;
}
static inline bool
is_not_const_zero(nir_alu_instr *instr, unsigned src, unsigned num_components,
const uint8_t *swizzle)
{
if (nir_src_as_const_value(instr->src[src].src) == NULL)
return true;
for (unsigned i = 0; i < num_components; i++) {
switch (nir_op_infos[instr->op].input_types[src]) {
case nir_type_float:
if (nir_src_comp_as_float(instr->src[src].src, swizzle[i]) == 0.0)
return false;
break;
case nir_type_bool:
case nir_type_int:
case nir_type_uint:
if (nir_src_comp_as_uint(instr->src[src].src, swizzle[i]) == 0)
return false;
break;
default:
return false;
}
}
return true;
}
static inline bool
is_not_const(nir_alu_instr *instr, unsigned src, UNUSED unsigned num_components,
UNUSED const uint8_t *swizzle)
{
return !nir_src_is_const(instr->src[src].src);
}
static inline bool
is_used_more_than_once(nir_alu_instr *instr)
{
bool zero_if_use = list_empty(&instr->dest.dest.ssa.if_uses);
bool zero_use = list_empty(&instr->dest.dest.ssa.uses);
if (zero_use && zero_if_use)
return false;
else if (zero_use && list_is_singular(&instr->dest.dest.ssa.if_uses))
return false;
else if (zero_if_use && list_is_singular(&instr->dest.dest.ssa.uses))
return false;
return true;
}
static inline bool
is_used_once(nir_alu_instr *instr)
{
bool zero_if_use = list_empty(&instr->dest.dest.ssa.if_uses);
bool zero_use = list_empty(&instr->dest.dest.ssa.uses);
if (zero_if_use && zero_use)
return false;
if (!zero_if_use && list_is_singular(&instr->dest.dest.ssa.uses))
return false;
if (!zero_use && list_is_singular(&instr->dest.dest.ssa.if_uses))
return false;
if (!list_is_singular(&instr->dest.dest.ssa.if_uses) &&
!list_is_singular(&instr->dest.dest.ssa.uses))
return false;
return true;
}
static inline bool
is_used_by_if(nir_alu_instr *instr)
{
return !list_empty(&instr->dest.dest.ssa.if_uses);
}
static inline bool
is_not_used_by_if(nir_alu_instr *instr)
{
return list_empty(&instr->dest.dest.ssa.if_uses);
}
#endif /* _NIR_SEARCH_ */
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