144 lines
2.7 KiB
C
144 lines
2.7 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2018 Intel Corporation
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*/
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#ifndef _I915_FIXED_H_
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#define _I915_FIXED_H_
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typedef struct {
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u32 val;
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} uint_fixed_16_16_t;
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#define FP_16_16_MAX ((uint_fixed_16_16_t){ .val = UINT_MAX })
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static inline bool is_fixed16_zero(uint_fixed_16_16_t val)
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{
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return val.val == 0;
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}
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static inline uint_fixed_16_16_t u32_to_fixed16(u32 val)
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{
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uint_fixed_16_16_t fp = { .val = val << 16 };
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WARN_ON(val > U16_MAX);
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return fp;
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}
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static inline u32 fixed16_to_u32_round_up(uint_fixed_16_16_t fp)
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{
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return DIV_ROUND_UP(fp.val, 1 << 16);
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}
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static inline u32 fixed16_to_u32(uint_fixed_16_16_t fp)
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{
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return fp.val >> 16;
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}
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static inline uint_fixed_16_16_t min_fixed16(uint_fixed_16_16_t min1,
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uint_fixed_16_16_t min2)
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{
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uint_fixed_16_16_t min = { .val = min(min1.val, min2.val) };
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return min;
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}
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static inline uint_fixed_16_16_t max_fixed16(uint_fixed_16_16_t max1,
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uint_fixed_16_16_t max2)
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{
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uint_fixed_16_16_t max = { .val = max(max1.val, max2.val) };
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return max;
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}
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static inline uint_fixed_16_16_t clamp_u64_to_fixed16(u64 val)
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{
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uint_fixed_16_16_t fp = { .val = (u32)val };
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WARN_ON(val > U32_MAX);
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return fp;
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}
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static inline u32 div_round_up_fixed16(uint_fixed_16_16_t val,
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uint_fixed_16_16_t d)
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{
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return DIV_ROUND_UP(val.val, d.val);
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}
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static inline u32 mul_round_up_u32_fixed16(u32 val, uint_fixed_16_16_t mul)
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{
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u64 tmp;
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tmp = (u64)val * mul.val;
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tmp = DIV_ROUND_UP_ULL(tmp, 1 << 16);
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WARN_ON(tmp > U32_MAX);
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return (u32)tmp;
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}
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static inline uint_fixed_16_16_t mul_fixed16(uint_fixed_16_16_t val,
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uint_fixed_16_16_t mul)
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{
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u64 tmp;
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tmp = (u64)val.val * mul.val;
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tmp = tmp >> 16;
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return clamp_u64_to_fixed16(tmp);
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}
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static inline uint_fixed_16_16_t div_fixed16(u32 val, u32 d)
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{
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u64 tmp;
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tmp = (u64)val << 16;
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tmp = DIV_ROUND_UP_ULL(tmp, d);
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return clamp_u64_to_fixed16(tmp);
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}
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static inline u32 div_round_up_u32_fixed16(u32 val, uint_fixed_16_16_t d)
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{
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u64 tmp;
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tmp = (u64)val << 16;
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tmp = DIV_ROUND_UP_ULL(tmp, d.val);
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WARN_ON(tmp > U32_MAX);
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return (u32)tmp;
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}
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static inline uint_fixed_16_16_t mul_u32_fixed16(u32 val, uint_fixed_16_16_t mul)
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{
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u64 tmp;
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tmp = (u64)val * mul.val;
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return clamp_u64_to_fixed16(tmp);
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}
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static inline uint_fixed_16_16_t add_fixed16(uint_fixed_16_16_t add1,
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uint_fixed_16_16_t add2)
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{
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u64 tmp;
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tmp = (u64)add1.val + add2.val;
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return clamp_u64_to_fixed16(tmp);
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}
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static inline uint_fixed_16_16_t add_fixed16_u32(uint_fixed_16_16_t add1,
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u32 add2)
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{
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uint_fixed_16_16_t tmp_add2 = u32_to_fixed16(add2);
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u64 tmp;
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tmp = (u64)add1.val + tmp_add2.val;
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return clamp_u64_to_fixed16(tmp);
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}
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#endif /* _I915_FIXED_H_ */
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