diff options
Diffstat (limited to 'util/bufferiszero.c')
| -rw-r--r-- | util/bufferiszero.c | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/util/bufferiszero.c b/util/bufferiszero.c index 3e6a5dfd63..f5a3634f9a 100644 --- a/util/bufferiszero.c +++ b/util/bufferiszero.c @@ -100,34 +100,6 @@ buffer_zero_sse2(const void *buf, size_t len) } #ifdef CONFIG_AVX2_OPT -static bool __attribute__((target("sse4"))) -buffer_zero_sse4(const void *buf, size_t len) -{ - __m128i t = _mm_loadu_si128(buf); - __m128i *p = (__m128i *)(((uintptr_t)buf + 5 * 16) & -16); - __m128i *e = (__m128i *)(((uintptr_t)buf + len) & -16); - - /* Loop over 16-byte aligned blocks of 64. */ - while (likely(p <= e)) { - __builtin_prefetch(p); - if (unlikely(!_mm_testz_si128(t, t))) { - return false; - } - t = p[-4] | p[-3] | p[-2] | p[-1]; - p += 4; - } - - /* Finish the aligned tail. */ - t |= e[-3]; - t |= e[-2]; - t |= e[-1]; - - /* Finish the unaligned tail. */ - t |= _mm_loadu_si128(buf + len - 16); - - return _mm_testz_si128(t, t); -} - static bool __attribute__((target("avx2"))) buffer_zero_avx2(const void *buf, size_t len) { @@ -221,7 +193,6 @@ select_accel_cpuinfo(unsigned info) #endif #ifdef CONFIG_AVX2_OPT { CPUINFO_AVX2, 128, buffer_zero_avx2 }, - { CPUINFO_SSE4, 64, buffer_zero_sse4 }, #endif { CPUINFO_SSE2, 64, buffer_zero_sse2 }, { CPUINFO_ALWAYS, 0, buffer_zero_int }, |