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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"
static inline bool
__is_power_of_two(unsigned int x)
{
return ((x != 0) && !(x & (x - 1)));
}
static inline bool
is_pos_power_of_two(nir_alu_instr *instr, unsigned src, unsigned num_components,
const uint8_t *swizzle)
{
nir_const_value *val = nir_src_as_const_value(instr->src[src].src);
/* only constant srcs: */
if (!val)
return false;
for (unsigned i = 0; i < num_components; i++) {
switch (nir_op_infos[instr->op].input_types[src]) {
case nir_type_int:
if (val->i32[swizzle[i]] < 0)
return false;
if (!__is_power_of_two(val->i32[swizzle[i]]))
return false;
break;
case nir_type_uint:
if (!__is_power_of_two(val->u32[swizzle[i]]))
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)
{
nir_const_value *val = nir_src_as_const_value(instr->src[src].src);
/* only constant srcs: */
if (!val)
return false;
for (unsigned i = 0; i < num_components; i++) {
switch (nir_op_infos[instr->op].input_types[src]) {
case nir_type_int:
if (val->i32[swizzle[i]] > 0)
return false;
if (!__is_power_of_two(abs(val->i32[swizzle[i]])))
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)
{
nir_const_value *val = nir_src_as_const_value(instr->src[src].src);
if (!val)
return false;
for (unsigned i = 0; i < num_components; i++) {
switch (nir_op_infos[instr->op].input_types[src]) {
case nir_type_float:
if (val->f32[swizzle[i]] < 0.0f || val->f32[swizzle[i]] > 1.0f)
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)
{
nir_const_value *val = nir_src_as_const_value(instr->src[src].src);
if (val)
return false;
return true;
}
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_not_used_by_if(nir_alu_instr *instr)
{
return list_empty(&instr->dest.dest.ssa.if_uses);
}
static inline bool
is_not_used_by_conditional(nir_alu_instr *instr)
{
if (!is_not_used_by_if(instr))
return false;
nir_foreach_use(use, &instr->dest.dest.ssa) {
if (use->parent_instr->type == nir_instr_type_alu &&
nir_instr_as_alu(use->parent_instr)->op == nir_op_bcsel)
return false;
}
return true;
}
#endif /* _NIR_SEARCH_ */
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