Revision 7a51ad82 host-utils.h
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* THE SOFTWARE. |
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*/ |
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#if defined(__x86_64__) |
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#define __HAVE_FAST_MULU64__ |
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static always_inline void mulu64 (uint64_t *plow, uint64_t *phigh, |
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uint64_t a, uint64_t b) |
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{
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__asm__ ("mul %0\n\t"
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: "=d" (*phigh), "=a" (*plow) |
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: "a" (a), "0" (b)); |
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} |
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#define __HAVE_FAST_MULS64__ |
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static always_inline void muls64 (uint64_t *plow, uint64_t *phigh, |
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int64_t a, int64_t b) |
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{
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__asm__ ("imul %0\n\t"
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: "=d" (*phigh), "=a" (*plow) |
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: "a" (a), "0" (b)); |
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} |
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#else |
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void muls64(int64_t *phigh, int64_t *plow, int64_t a, int64_t b); |
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void mulu64(uint64_t *phigh, uint64_t *plow, uint64_t a, uint64_t b); |
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#endif |
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/* Note that some of those functions may end up calling libgcc functions, |
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depending on the host machine. It is up to the target emulation to |
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cope with that. */ |
| ... | ... | |
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{
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int cnt = 0; |
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if (!(val & 0xFFFFFFFF00000000ULL)) {
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if (!(val >> 32)) {
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cnt += 32; |
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val <<= 32; |
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} |
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if (!(val & 0xFFFF000000000000ULL)) {
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cnt += 16; |
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val <<= 16; |
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} |
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if (!(val & 0xFF00000000000000ULL)) {
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cnt += 8; |
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val <<= 8; |
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} |
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if (!(val & 0xF000000000000000ULL)) {
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cnt += 4; |
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val <<= 4; |
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} |
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if (!(val & 0xC000000000000000ULL)) {
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cnt += 2; |
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val <<= 2; |
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} |
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if (!(val & 0x8000000000000000ULL)) {
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cnt++; |
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val <<= 1; |
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} |
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if (!(val & 0x8000000000000000ULL)) {
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cnt++; |
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} else {
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val >>= 32; |
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} |
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return cnt; |
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return cnt + clz32(val); |
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} |
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static always_inline int clo64(uint64_t val) |
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