diff options
| author | Romain Dolbeau <[email protected]> | 2016-11-04 18:53:03 +0100 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2016-11-04 10:53:03 -0700 |
| commit | 7f3194932d22c667026aff1b263ceaa1ebd012ee (patch) | |
| tree | b68eee7abd34de2410db38208c35c184af2ddd70 /include/zfs_fletcher.h | |
| parent | ace1eae84cca8579596f46262d99df19f6d7e963 (diff) | |
Add superscalar fletcher4
This is the Fletcher4 algorithm implemented in pure C, but using
multiple counters using algorithms identical to those used for
SSE/NEON and AVX2.
This allows for faster execution on core with strong superscalar
capabilities but weak SIMD capabilities.
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Romain Dolbeau <[email protected]>
Closes #5317
Diffstat (limited to 'include/zfs_fletcher.h')
| -rw-r--r-- | include/zfs_fletcher.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/zfs_fletcher.h b/include/zfs_fletcher.h index 1f113ae2f..633606d14 100644 --- a/include/zfs_fletcher.h +++ b/include/zfs_fletcher.h @@ -65,6 +65,10 @@ void fletcher_4_fini(void); /* Internal fletcher ctx */ +typedef struct zfs_fletcher_superscalar { + uint64_t v[4]; +} zfs_fletcher_superscalar_t; + typedef struct zfs_fletcher_sse { uint64_t v[2] __attribute__((aligned(16))); } zfs_fletcher_sse_t; @@ -84,6 +88,7 @@ typedef struct zfs_fletcher_aarch64_neon { typedef union fletcher_4_ctx { zio_cksum_t scalar; + zfs_fletcher_superscalar_t superscalar[4]; #if defined(HAVE_SSE2) || (defined(HAVE_SSE2) && defined(HAVE_SSSE3)) zfs_fletcher_sse_t sse[4]; @@ -118,6 +123,8 @@ typedef struct fletcher_4_func { const char *name; } fletcher_4_ops_t; +extern const fletcher_4_ops_t fletcher_4_superscalar_ops; +extern const fletcher_4_ops_t fletcher_4_superscalar4_ops; #if defined(HAVE_SSE2) extern const fletcher_4_ops_t fletcher_4_sse2_ops; |