diff options
| author | Jason Ekstrand <[email protected]> | 2018-05-30 20:00:37 -0700 |
|---|---|---|
| committer | Jason Ekstrand <[email protected]> | 2018-05-31 16:51:45 -0700 |
| commit | 6e4672f881bbc73c56b0d81dfea93d09f8d39eec (patch) | |
| tree | 090a352ae80a31223b3192606ac8066591488b35 /src/intel/common | |
| parent | 943fecc5691b55b8ce8740d133dd70614effb72d (diff) | |
intel/common: Add an address de-canonicalization helper
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Scott D Phillips <[email protected]>
Diffstat (limited to 'src/intel/common')
| -rw-r--r-- | src/intel/common/gen_gem.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/intel/common/gen_gem.h b/src/intel/common/gen_gem.h index 842a455e050..7dd9ae6d548 100644 --- a/src/intel/common/gen_gem.h +++ b/src/intel/common/gen_gem.h @@ -40,4 +40,16 @@ gen_canonical_address(uint64_t v) return (int64_t)(v << shift) >> shift; } +/** + * This returns a 48-bit address with the high 16 bits zeroed. + * + * It's the opposite of gen_canonicalize_address. + */ +static inline uint64_t +gen_48b_address(uint64_t v) +{ + const int shift = 63 - 47; + return (uint64_t)(v << shift) >> shift; +} + #endif /* GEN_GEM_H */ |