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 | 26 |
1 files changed, 24 insertions, 2 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 index 4477e6208998..39ee8eba3c31 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h +++ b/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h @@ -26,10 +26,19 @@ #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) { @@ -56,9 +65,22 @@ static inline struct bw_fixed bw_max3(struct bw_fixed v1, return bw_max2(bw_max2(v1, v2), v3); } -struct bw_fixed bw_int_to_fixed(int64_t value); +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); +} -int32_t bw_fixed_to_int(struct bw_fixed 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); |