From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:45:59 +0200 Subject: Adding upstream version 16.2.11+ds. Signed-off-by: Daniel Baumann --- src/common/crc32c_intel_fast.c | 51 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 src/common/crc32c_intel_fast.c (limited to 'src/common/crc32c_intel_fast.c') diff --git a/src/common/crc32c_intel_fast.c b/src/common/crc32c_intel_fast.c new file mode 100644 index 000000000..28bd93416 --- /dev/null +++ b/src/common/crc32c_intel_fast.c @@ -0,0 +1,51 @@ +#include "acconfig.h" +#include "common/crc32c_intel_baseline.h" + +extern unsigned int crc32_iscsi_00(unsigned char const *buffer, uint64_t len, uint64_t crc) asm("crc32_iscsi_00"); +extern unsigned int crc32_iscsi_zero_00(unsigned char const *buffer, uint64_t len, uint64_t crc) asm("crc32_iscsi_zero_00"); + +#ifdef HAVE_NASM_X64 + +uint32_t ceph_crc32c_intel_fast(uint32_t crc, unsigned char const *buffer, unsigned len) +{ + uint32_t v; + unsigned left; + + if (!buffer) + { + return crc32_iscsi_zero_00(buffer, len, crc); + } + + /* + * the crc32_iscsi_00 method reads past buffer+len (because it + * reads full words) which makes valgrind unhappy. don't do + * that. + */ + if (len < 16) + return ceph_crc32c_intel_baseline(crc, buffer, len); + left = ((unsigned long)buffer + len) & 7; + len -= left; + v = crc32_iscsi_00(buffer, len, crc); + if (left) + v = ceph_crc32c_intel_baseline(v, buffer + len, left); + return v; +} + +int ceph_crc32c_intel_fast_exists(void) +{ + return 1; +} + +#else + +int ceph_crc32c_intel_fast_exists(void) +{ + return 0; +} + +uint32_t ceph_crc32c_intel_fast(uint32_t crc, unsigned char const *buffer, unsigned len) +{ + return 0; +} + +#endif -- cgit v1.2.3