mirror of
https://github.com/Yours3lf/rpi-vk-driver.git
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206 lines
5.1 KiB
C
206 lines
5.1 KiB
C
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/*
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* Copyright (C) 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <math.h>
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#ifdef HAVE_VALGRIND
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#include <valgrind.h>
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#include <memcheck.h>
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#define VG(x) x
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#define __gen_validate_value(x) VALGRIND_CHECK_MEM_IS_DEFINED(&(x), sizeof(x))
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#else
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#define VG(x)
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#endif
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#ifndef __gen_validate_value
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#define __gen_validate_value(x)
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#endif
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/*
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#ifndef __gen_address_type
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#error #define __gen_address_type before including this file
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#endif
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#ifndef __gen_user_data
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#error #define __gen_combine_address before including this file
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#endif
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*/
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union __gen_value {
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float f;
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uint32_t dw;
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};
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static inline uint64_t
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__gen_mbo(uint32_t start, uint32_t end)
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{
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return (~0ull >> (64 - (end - start + 1))) << start;
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}
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static inline uint64_t
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__gen_uint(uint64_t v, uint32_t start, uint32_t end)
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{
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__gen_validate_value(v);
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#if DEBUG
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const int width = end - start + 1;
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if (width < 64) {
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const uint64_t max = (1ull << width) - 1;
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assert(v <= max);
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}
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#endif
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return v << start;
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}
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static inline uint64_t
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__gen_sint(int64_t v, uint32_t start, uint32_t end)
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{
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const int width = end - start + 1;
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__gen_validate_value(v);
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#if DEBUG
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if (width < 64) {
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const int64_t max = (1ll << (width - 1)) - 1;
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const int64_t min = -(1ll << (width - 1));
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assert(min <= v && v <= max);
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}
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#endif
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const uint64_t mask = ~0ull >> (64 - width);
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return (v & mask) << start;
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}
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static inline uint64_t
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__gen_offset(uint64_t v, uint32_t start, uint32_t end)
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{
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__gen_validate_value(v);
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#if DEBUG
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uint64_t mask = (~0ull >> (64 - (end - start + 1))) << start;
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assert((v & ~mask) == 0);
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#endif
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return v;
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}
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static inline uint32_t
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__gen_float(float v)
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{
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__gen_validate_value(v);
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return ((union __gen_value) { .f = (v) }).dw;
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}
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static inline uint64_t
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__gen_sfixed(float v, uint32_t start, uint32_t end, uint32_t fract_bits)
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{
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__gen_validate_value(v);
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const float factor = (1 << fract_bits);
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#if DEBUG
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const float max = ((1 << (end - start)) - 1) / factor;
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const float min = -(1 << (end - start)) / factor;
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assert(min <= v && v <= max);
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#endif
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const int64_t int_val = llroundf(v * factor);
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const uint64_t mask = ~0ull >> (64 - (end - start + 1));
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return (int_val & mask) << start;
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}
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static inline uint64_t
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__gen_ufixed(float v, uint32_t start, uint32_t end, uint32_t fract_bits)
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{
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__gen_validate_value(v);
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const float factor = (1 << fract_bits);
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#if DEBUG
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const float max = ((1 << (end - start + 1)) - 1) / factor;
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const float min = 0.0f;
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assert(min <= v && v <= max);
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#endif
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const uint64_t uint_val = llroundf(v * factor);
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return uint_val << start;
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}
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static inline uint64_t
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__gen_unpack_uint(const uint8_t *restrict cl, uint32_t start, uint32_t end)
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{
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uint64_t val = 0;
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const int width = end - start + 1;
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const uint32_t mask = (width == 32 ? ~0 : (1 << width) - 1 );
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for (int byte = start / 8; byte <= end / 8; byte++) {
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val |= cl[byte] << ((byte - start / 8) * 8);
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}
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return (val >> (start % 8)) & mask;
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}
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static inline uint64_t
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__gen_unpack_sint(const uint8_t *restrict cl, uint32_t start, uint32_t end)
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{
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int size = end - start + 1;
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int64_t val = __gen_unpack_uint(cl, start, end);
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/* Get the sign bit extended. */
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return (val << (64 - size)) >> (64 - size);
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}
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static inline float
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__gen_unpack_sfixed(const uint8_t *restrict cl, uint32_t start, uint32_t end,
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uint32_t fractional_size)
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{
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int32_t bits = __gen_unpack_sint(cl, start, end);
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return (float)bits / (1 << fractional_size);
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}
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static inline float
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__gen_unpack_ufixed(const uint8_t *restrict cl, uint32_t start, uint32_t end,
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uint32_t fractional_size)
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{
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int32_t bits = __gen_unpack_uint(cl, start, end);
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return (float)bits / (1 << fractional_size);
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}
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static inline float
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__gen_unpack_float(const uint8_t *restrict cl, uint32_t start, uint32_t end)
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{
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assert(start % 8 == 0);
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assert(end - start == 31);
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struct PACKED { float f; } *f = (void *)(cl + (start / 8));
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return f->f;
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}
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