diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h b/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h new file mode 100644 index 0000000000..d1656c9d50 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h @@ -0,0 +1,166 @@ +/* + * Copyright 2015 Advanced Micro Devices, Inc. + * + * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: AMD + * + */ + +#ifndef BW_FIXED_H_ +#define BW_FIXED_H_ + +#define BW_FIXED_BITS_PER_FRACTIONAL_PART 24 + +#define BW_FIXED_GET_INTEGER_PART(x) ((x) >> BW_FIXED_BITS_PER_FRACTIONAL_PART) +struct bw_fixed { + int64_t value; +}; + +#define BW_FIXED_MIN_I32 \ + (int64_t)(-(1LL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART))) + +#define BW_FIXED_MAX_I32 \ + (int64_t)((1ULL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)) - 1) + +static inline struct bw_fixed bw_min2(const struct bw_fixed arg1, + const struct bw_fixed arg2) +{ + return (arg1.value <= arg2.value) ? arg1 : arg2; +} + +static inline struct bw_fixed bw_max2(const struct bw_fixed arg1, + const struct bw_fixed arg2) +{ + return (arg2.value <= arg1.value) ? arg1 : arg2; +} + +static inline struct bw_fixed bw_min3(struct bw_fixed v1, + struct bw_fixed v2, + struct bw_fixed v3) +{ + return bw_min2(bw_min2(v1, v2), v3); +} + +static inline struct bw_fixed bw_max3(struct bw_fixed v1, + struct bw_fixed v2, + struct bw_fixed v3) +{ + return bw_max2(bw_max2(v1, v2), v3); +} + +struct bw_fixed bw_int_to_fixed_nonconst(int64_t value); +static inline struct bw_fixed bw_int_to_fixed(int64_t value) +{ + if (__builtin_constant_p(value)) { + struct bw_fixed res; + BUILD_BUG_ON(value > BW_FIXED_MAX_I32 || value < BW_FIXED_MIN_I32); + res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART; + return res; + } else + return bw_int_to_fixed_nonconst(value); +} + +static inline int32_t bw_fixed_to_int(struct bw_fixed value) +{ + return BW_FIXED_GET_INTEGER_PART(value.value); +} + +struct bw_fixed bw_frc_to_fixed(int64_t num, int64_t denum); + +static inline struct bw_fixed fixed31_32_to_bw_fixed(int64_t raw) +{ + struct bw_fixed result = { 0 }; + + if (raw < 0) { + raw = -raw; + result.value = -(raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART)); + } else { + result.value = raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART); + } + + return result; +} + +static inline struct bw_fixed bw_add(const struct bw_fixed arg1, + const struct bw_fixed arg2) +{ + struct bw_fixed res; + + res.value = arg1.value + arg2.value; + + return res; +} + +static inline struct bw_fixed bw_sub(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + struct bw_fixed res; + + res.value = arg1.value - arg2.value; + + return res; +} + +struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2); +static inline struct bw_fixed bw_div(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + return bw_frc_to_fixed(arg1.value, arg2.value); +} + +static inline struct bw_fixed bw_mod(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + struct bw_fixed res; + div64_u64_rem(arg1.value, arg2.value, (uint64_t *)&res.value); + return res; +} + +struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance); +struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance); + +static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + return arg1.value == arg2.value; +} + +static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + return arg1.value != arg2.value; +} + +static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + return arg1.value <= arg2.value; +} + +static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + return arg1.value >= arg2.value; +} + +static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + return arg1.value < arg2.value; +} + +static inline bool bw_mtn(const struct bw_fixed arg1, const struct bw_fixed arg2) +{ + return arg1.value > arg2.value; +} + +#endif //BW_FIXED_H_ |