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author | j_mayer <j_mayer@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-11-04 02:24:58 +0000 |
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committer | j_mayer <j_mayer@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-11-04 02:24:58 +0000 |
commit | 7a51ad822f533472cab908d2622578d51eb97dc6 (patch) | |
tree | 92e7d1dda1536cd9260d203ac93714e3adedd24b /host-utils.h | |
parent | 077fc2061e254422c44b2de16c526476398113ae (diff) | |
download | hqemu-7a51ad822f533472cab908d2622578d51eb97dc6.zip hqemu-7a51ad822f533472cab908d2622578d51eb97dc6.tar.gz |
For consistency, move muls64 / mulu64 prototypes to host-utils.h
Make x86_64 optimized versions inline.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3523 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'host-utils.h')
-rw-r--r-- | host-utils.h | 53 |
1 files changed, 27 insertions, 26 deletions
diff --git a/host-utils.h b/host-utils.h index fe306f6..234a062 100644 --- a/host-utils.h +++ b/host-utils.h @@ -23,6 +23,28 @@ * THE SOFTWARE. */ +#if defined(__x86_64__) +#define __HAVE_FAST_MULU64__ +static always_inline void mulu64 (uint64_t *plow, uint64_t *phigh, + uint64_t a, uint64_t b) +{ + __asm__ ("mul %0\n\t" + : "=d" (*phigh), "=a" (*plow) + : "a" (a), "0" (b)); +} +#define __HAVE_FAST_MULS64__ +static always_inline void muls64 (uint64_t *plow, uint64_t *phigh, + int64_t a, int64_t b) +{ + __asm__ ("imul %0\n\t" + : "=d" (*phigh), "=a" (*plow) + : "a" (a), "0" (b)); +} +#else +void muls64(int64_t *phigh, int64_t *plow, int64_t a, int64_t b); +void mulu64(uint64_t *phigh, uint64_t *plow, uint64_t a, uint64_t b); +#endif + /* Note that some of those functions may end up calling libgcc functions, depending on the host machine. It is up to the target emulation to cope with that. */ @@ -68,34 +90,13 @@ static always_inline int clz64(uint64_t val) { int cnt = 0; - if (!(val & 0xFFFFFFFF00000000ULL)) { + if (!(val >> 32)) { cnt += 32; - val <<= 32; - } - if (!(val & 0xFFFF000000000000ULL)) { - cnt += 16; - val <<= 16; - } - if (!(val & 0xFF00000000000000ULL)) { - cnt += 8; - val <<= 8; - } - if (!(val & 0xF000000000000000ULL)) { - cnt += 4; - val <<= 4; - } - if (!(val & 0xC000000000000000ULL)) { - cnt += 2; - val <<= 2; - } - if (!(val & 0x8000000000000000ULL)) { - cnt++; - val <<= 1; - } - if (!(val & 0x8000000000000000ULL)) { - cnt++; + } else { + val >>= 32; } - return cnt; + + return cnt + clz32(val); } static always_inline int clo64(uint64_t val) |