diff options
Diffstat (limited to 'target-arm/helper-a64.c')
| -rw-r--r-- | target-arm/helper-a64.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c index f0d27229d4..2b4ce6ac60 100644 --- a/target-arm/helper-a64.c +++ b/target-arm/helper-a64.c @@ -24,6 +24,8 @@ #include "sysemu/sysemu.h" #include "qemu/bitops.h" #include "internals.h" +#include "qemu/crc32c.h" +#include <zlib.h> /* For crc32 */ /* C2.4.7 Multiply and divide */ /* special cases for 0 and LLONG_MIN are mandated by the standard */ @@ -408,6 +410,34 @@ float32 HELPER(fcvtx_f64_to_f32)(float64 a, CPUARMState *env) return r; } +/* 64-bit versions of the CRC helpers. Note that although the operation + * (and the prototypes of crc32c() and crc32() mean that only the bottom + * 32 bits of the accumulator and result are used, we pass and return + * uint64_t for convenience of the generated code. Unlike the 32-bit + * instruction set versions, val may genuinely have 64 bits of data in it. + * The upper bytes of val (above the number specified by 'bytes') must have + * been zeroed out by the caller. + */ +uint64_t HELPER(crc32_64)(uint64_t acc, uint64_t val, uint32_t bytes) +{ + uint8_t buf[8]; + + stq_le_p(buf, val); + + /* zlib crc32 converts the accumulator and output to one's complement. */ + return crc32(acc ^ 0xffffffff, buf, bytes) ^ 0xffffffff; +} + +uint64_t HELPER(crc32c_64)(uint64_t acc, uint64_t val, uint32_t bytes) +{ + uint8_t buf[8]; + + stq_le_p(buf, val); + + /* Linux crc32c converts the output to one's complement. */ + return crc32c(acc, buf, bytes) ^ 0xffffffff; +} + /* Handle a CPU exception. */ void aarch64_cpu_do_interrupt(CPUState *cs) { |