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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-08-07 12:12:37 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-09-21 10:29:36 +0200 |
| commit | de261e0404e1fe54544275fc57d5b982df4f42b4 (patch) | |
| tree | 856cbdf23d6809b99c4d642d066bc45cd67c26e6 /freebsd/sys/libkern | |
| parent | libbsd.txt: Use rtems_bsd_ifconfig_lo0() (diff) | |
| download | rtems-libbsd-de261e0404e1fe54544275fc57d5b982df4f42b4.tar.bz2 | |
Update to FreeBSD head 2017-06-01
Git mirror commit dfb26efac4ce9101dda240e94d9ab53f80a9e131.
Update #3472.
Diffstat (limited to 'freebsd/sys/libkern')
| -rw-r--r-- | freebsd/sys/libkern/crc32.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/freebsd/sys/libkern/crc32.c b/freebsd/sys/libkern/crc32.c index f8fc46ea..c987fb4d 100644 --- a/freebsd/sys/libkern/crc32.c +++ b/freebsd/sys/libkern/crc32.c @@ -56,6 +56,10 @@ __FBSDID("$FreeBSD$"); #include <machine/specialreg.h> #endif +#if defined(__aarch64__) +#include <machine/cpu.h> +#endif + const uint32_t crc32_tab[] = { 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, @@ -762,6 +766,18 @@ calculate_crc32c(uint32_t crc32c, return (sse42_crc32c(crc32c, buffer, length)); } else #endif +#if defined(__aarch64__) + uint64_t reg; + + /* + * We only test for CRC32 support on the CPU with index 0 assuming that + * this applies to all CPUs. + */ + reg = READ_SPECIALREG(id_aa64isar0_el1); + if (ID_AA64ISAR0_CRC32(reg) != ID_AA64ISAR0_CRC32_NONE) { + return (armv8_crc32c(crc32c, buffer, length)); + } else +#endif if (length < 4) { return (singletable_crc32c(crc32c, buffer, length)); } else { |