On 12/02/2016 09:00 PM, Jose Ricardo Ziviani wrote:
+++ b/include/qemu/host-utils.h @@ -29,6 +29,33 @@ #include "qemu/bswap.h"#ifdef CONFIG_INT128 +static inline void urshift(uint64_t *plow, uint64_t *phigh, uint32_t shift) +{ + __uint128_t val = ((__uint128_t)*phigh << 64) | *plow; + val >>= (shift & 127); + *phigh = val >> 64; + *plow = val & 0xffffffffffffffff; +} + +static inline void ulshift(uint64_t *plow, uint64_t *phigh, + uint32_t shift, bool *overflow) +{ + __uint128_t val = ((__uint128_t)*phigh << 64) | *plow; + + if (shift == 0) { + return; + } + + if (shift > 127 || (val >> (128 - (shift & 127))) != 0) { + *overflow = true; + } + + val <<= (shift & 127); + + *phigh = val >> 64; + *plow = val & 0xffffffffffffffff; +} +
This belongs in qemu/int128.h, not here. And certainly not predicated on CONFIG_INT128.
r~
