diff options
| -rw-r--r-- | lib/raid6/neon.uc | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/lib/raid6/neon.uc b/lib/raid6/neon.uc index 4fa51b761dd0..d5242f544551 100644 --- a/lib/raid6/neon.uc +++ b/lib/raid6/neon.uc @@ -46,8 +46,12 @@ static inline unative_t SHLBYTE(unative_t v) */ static inline unative_t MASK(unative_t v) { - const uint8x16_t temp = NBYTES(0); - return (unative_t)vcltq_s8((int8x16_t)v, (int8x16_t)temp); + return (unative_t)vshrq_n_s8((int8x16_t)v, 7); +} + +static inline unative_t PMUL(unative_t v, unative_t u) +{ + return (unative_t)vmulq_p8((poly8x16_t)v, (poly8x16_t)u); } void raid6_neon$#_gen_syndrome_real(int disks, unsigned long bytes, void **ptrs) @@ -110,7 +114,30 @@ void raid6_neon$#_xor_syndrome_real(int disks, int start, int stop, wq$$ = veorq_u8(w1$$, wd$$); } /* P/Q left side optimization */ - for ( z = start-1 ; z >= 0 ; z-- ) { + for ( z = start-1 ; z >= 3 ; z -= 4 ) { + w2$$ = vshrq_n_u8(wq$$, 4); + w1$$ = vshlq_n_u8(wq$$, 4); + + w2$$ = PMUL(w2$$, x1d); + wq$$ = veorq_u8(w1$$, w2$$); + } + + switch (z) { + case 2: + w2$$ = vshrq_n_u8(wq$$, 5); + w1$$ = vshlq_n_u8(wq$$, 3); + + w2$$ = PMUL(w2$$, x1d); + wq$$ = veorq_u8(w1$$, w2$$); + break; + case 1: + w2$$ = vshrq_n_u8(wq$$, 6); + w1$$ = vshlq_n_u8(wq$$, 2); + + w2$$ = PMUL(w2$$, x1d); + wq$$ = veorq_u8(w1$$, w2$$); + break; + case 0: w2$$ = MASK(wq$$); w1$$ = SHLBYTE(wq$$); |