165 lines
5.3 KiB
C
165 lines
5.3 KiB
C
/*
|
|
* Copyright © 2022 Imagination Technologies 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.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <stdarg.h>
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "rogue_encoders.h"
|
|
#include "rogue_util.h"
|
|
#include "util/bitscan.h"
|
|
|
|
/**
|
|
* \brief Passes the input value through unchanged.
|
|
*
|
|
* \param[in] value Pointer to the destination value.
|
|
* \param[in] inputs Number of inputs provided.
|
|
* \param[in] ... Input value(s).
|
|
* \return true if encoding was successful.
|
|
*/
|
|
bool rogue_encoder_pass(uint64_t *value, size_t inputs, ...)
|
|
{
|
|
va_list args;
|
|
|
|
assert(inputs == 1);
|
|
|
|
va_start(args, inputs);
|
|
*value = va_arg(args, uint64_t);
|
|
va_end(args);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* \brief Encoder for DRC values.
|
|
*
|
|
* \sa #rogue_encoder_pass()
|
|
*
|
|
* \param[in] value Pointer to the destination value.
|
|
* \param[in] inputs Number of inputs provided.
|
|
* \param[in] ... Input value(s).
|
|
* \return true if encoding was successful.
|
|
*/
|
|
bool rogue_encoder_drc(uint64_t *value, size_t inputs, ...)
|
|
__attribute__((alias("rogue_encoder_pass")));
|
|
|
|
/**
|
|
* \brief Encoder for immediate values.
|
|
*
|
|
* \sa #rogue_encoder_pass()
|
|
*
|
|
* \param[in] value Pointer to the destination value.
|
|
* \param[in] inputs Number of inputs provided.
|
|
* \param[in] ... Input value(s).
|
|
* \return true if encoding was successful.
|
|
*/
|
|
bool rogue_encoder_imm(uint64_t *value, size_t inputs, ...)
|
|
__attribute__((alias("rogue_encoder_pass")));
|
|
|
|
/**
|
|
* \brief Encodes input ranges {1..15 -> 1-15} and {16 -> 0}.
|
|
*
|
|
* The input should be in the range 1-16; the function represents 1-15 normally
|
|
* and represents 16 by 0.
|
|
*
|
|
* \param[in] value Pointer to the destination value.
|
|
* \param[in] inputs Number of inputs provided.
|
|
* \param[in] ... Input value(s).
|
|
* \return true if encoding was successful.
|
|
*/
|
|
bool rogue_encoder_ls_1_16(uint64_t *value, size_t inputs, ...)
|
|
{
|
|
va_list args;
|
|
uint64_t input;
|
|
|
|
assert(inputs == 1);
|
|
|
|
va_start(args, inputs);
|
|
input = va_arg(args, uint64_t);
|
|
va_end(args);
|
|
|
|
/* Validate the input range. */
|
|
if (!input || input > 16) {
|
|
*value = UINT64_MAX;
|
|
return false;
|
|
}
|
|
|
|
*value = input % 16;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* \brief Encodes registers according to the number of bits needed to specify
|
|
* the bank number and register number.
|
|
*
|
|
* \param[in] value Pointer to the destination value.
|
|
* \param[in] bank_bits The number of bits used to represent the register bank.
|
|
* \param[in] bank the register bank
|
|
* \param[in] num_bits The number of bits used to represent the register number.
|
|
* \param[in] num The register number.
|
|
* \return true if encoding was successful.
|
|
*/
|
|
static bool rogue_encoder_reg(uint64_t *value,
|
|
size_t bank_bits,
|
|
size_t bank,
|
|
size_t num_bits,
|
|
size_t num)
|
|
{
|
|
/* Verify "num" fits in "num_bits" and "bank" fits in "bank_bits". */
|
|
assert(util_last_bit64(num) <= num_bits);
|
|
assert(util_last_bit64(bank) <= bank_bits);
|
|
|
|
*value = num;
|
|
*value |= (bank << num_bits);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* \brief Macro to define the rogue_encoder_reg variants.
|
|
*/
|
|
#define ROGUE_ENCODER_REG_VARIANT(bank_bits, num_bits) \
|
|
bool rogue_encoder_reg_##bank_bits##_##num_bits(uint64_t *value, \
|
|
size_t inputs, \
|
|
...) \
|
|
{ \
|
|
va_list args; \
|
|
size_t bank; \
|
|
size_t num; \
|
|
assert(inputs == 2); \
|
|
va_start(args, inputs); \
|
|
bank = va_arg(args, size_t); \
|
|
num = va_arg(args, size_t); \
|
|
va_end(args); \
|
|
return rogue_encoder_reg(value, bank_bits, bank, num_bits, num); \
|
|
}
|
|
|
|
ROGUE_ENCODER_REG_VARIANT(2, 8)
|
|
ROGUE_ENCODER_REG_VARIANT(3, 8)
|
|
ROGUE_ENCODER_REG_VARIANT(3, 11)
|
|
|
|
#undef ROGUE_ENCODER_REG_VARIANT
|