diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/include/fixed31_32.h | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/display/include/fixed31_32.h b/drivers/gpu/drm/amd/display/include/fixed31_32.h index 61f11e23bf70..bd8a30462258 100644 --- a/drivers/gpu/drm/amd/display/include/fixed31_32.h +++ b/drivers/gpu/drm/amd/display/include/fixed31_32.h @@ -27,6 +27,12 @@ #define __DAL_FIXED31_32_H__ #define FIXED31_32_BITS_PER_FRACTIONAL_PART 32 +#ifndef LLONG_MIN +#define LLONG_MIN (1LL<<63) +#endif +#ifndef LLONG_MAX +#define LLONG_MAX (-1LL>>1) +#endif /* * @brief @@ -45,6 +51,7 @@ struct fixed31_32 { long long value; }; + /* * @brief * Useful constants @@ -201,14 +208,12 @@ static inline struct fixed31_32 dc_fixpt_clamp( */ static inline struct fixed31_32 dc_fixpt_shl(struct fixed31_32 arg, unsigned char shift) { - struct fixed31_32 res; - ASSERT(((arg.value >= 0) && (arg.value <= LLONG_MAX >> shift)) || - ((arg.value < 0) && (arg.value >= LLONG_MIN >> shift))); + ((arg.value < 0) && (arg.value >= (LLONG_MIN / (1 << shift))))); - res.value = arg.value << shift; + arg.value = arg.value << shift; - return res; + return arg; } /* @@ -217,9 +222,14 @@ static inline struct fixed31_32 dc_fixpt_shl(struct fixed31_32 arg, unsigned cha */ static inline struct fixed31_32 dc_fixpt_shr(struct fixed31_32 arg, unsigned char shift) { - struct fixed31_32 res; - res.value = arg.value >> shift; - return res; + bool negative = arg.value < 0; + + if (negative) + arg.value = -arg.value; + arg.value = arg.value >> shift; + if (negative) + arg.value = -arg.value; + return arg; } /* |