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Diffstat (limited to 'src/recompiler/host-utils.h')
| -rw-r--r-- | src/recompiler/host-utils.h | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/src/recompiler/host-utils.h b/src/recompiler/host-utils.h new file mode 100644 index 00000000..0ddc1765 --- /dev/null +++ b/src/recompiler/host-utils.h @@ -0,0 +1,236 @@ +/* + * Utility compute operations used by translated code. + * + * Copyright (c) 2007 Thiemo Seufer + * Copyright (c) 2007 Jocelyn Mayer + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "osdep.h" + +#if defined(__x86_64__) +#define __HAVE_FAST_MULU64__ +static 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 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(uint64_t *phigh, uint64_t *plow, int64_t a, int64_t b); +void mulu64(uint64_t *phigh, uint64_t *plow, uint64_t a, uint64_t b); +#endif + +/* Binary search for leading zeros. */ + +static inline int clz32(uint32_t val) +{ +#if QEMU_GNUC_PREREQ(3, 4) + if (val) + return __builtin_clz(val); + else + return 32; +#else + int cnt = 0; + + if (!(val & 0xFFFF0000U)) { + cnt += 16; + val <<= 16; + } + if (!(val & 0xFF000000U)) { + cnt += 8; + val <<= 8; + } + if (!(val & 0xF0000000U)) { + cnt += 4; + val <<= 4; + } + if (!(val & 0xC0000000U)) { + cnt += 2; + val <<= 2; + } + if (!(val & 0x80000000U)) { + cnt++; + val <<= 1; + } + if (!(val & 0x80000000U)) { + cnt++; + } + return cnt; +#endif +} + +static inline int clo32(uint32_t val) +{ + return clz32(~val); +} + +static inline int clz64(uint64_t val) +{ +#if QEMU_GNUC_PREREQ(3, 4) + if (val) + return __builtin_clzll(val); + else + return 64; +#else + int cnt = 0; + + if (!(val >> 32)) { + cnt += 32; + } else { + val >>= 32; + } + + return cnt + clz32(val); +#endif +} + +static inline int clo64(uint64_t val) +{ + return clz64(~val); +} + +static inline int ctz32(uint32_t val) +{ +#if QEMU_GNUC_PREREQ(3, 4) + if (val) + return __builtin_ctz(val); + else + return 32; +#else + int cnt; + + cnt = 0; + if (!(val & 0x0000FFFFUL)) { + cnt += 16; + val >>= 16; + } + if (!(val & 0x000000FFUL)) { + cnt += 8; + val >>= 8; + } + if (!(val & 0x0000000FUL)) { + cnt += 4; + val >>= 4; + } + if (!(val & 0x00000003UL)) { + cnt += 2; + val >>= 2; + } + if (!(val & 0x00000001UL)) { + cnt++; + val >>= 1; + } + if (!(val & 0x00000001UL)) { + cnt++; + } + + return cnt; +#endif +} + +static inline int cto32(uint32_t val) +{ + return ctz32(~val); +} + +static inline int ctz64(uint64_t val) +{ +#if QEMU_GNUC_PREREQ(3, 4) + if (val) + return __builtin_ctzll(val); + else + return 64; +#else + int cnt; + + cnt = 0; + if (!((uint32_t)val)) { + cnt += 32; + val >>= 32; + } + + return cnt + ctz32(val); +#endif +} + +static inline int cto64(uint64_t val) +{ + return ctz64(~val); +} + +static inline int ctpop8(uint8_t val) +{ + val = (val & 0x55) + ((val >> 1) & 0x55); + val = (val & 0x33) + ((val >> 2) & 0x33); + val = (val & 0x0f) + ((val >> 4) & 0x0f); + + return val; +} + +static inline int ctpop16(uint16_t val) +{ + val = (val & 0x5555) + ((val >> 1) & 0x5555); + val = (val & 0x3333) + ((val >> 2) & 0x3333); + val = (val & 0x0f0f) + ((val >> 4) & 0x0f0f); + val = (val & 0x00ff) + ((val >> 8) & 0x00ff); + + return val; +} + +static inline int ctpop32(uint32_t val) +{ +#if QEMU_GNUC_PREREQ(3, 4) + return __builtin_popcount(val); +#else + val = (val & 0x55555555) + ((val >> 1) & 0x55555555); + val = (val & 0x33333333) + ((val >> 2) & 0x33333333); + val = (val & 0x0f0f0f0f) + ((val >> 4) & 0x0f0f0f0f); + val = (val & 0x00ff00ff) + ((val >> 8) & 0x00ff00ff); + val = (val & 0x0000ffff) + ((val >> 16) & 0x0000ffff); + + return val; +#endif +} + +static inline int ctpop64(uint64_t val) +{ +#if QEMU_GNUC_PREREQ(3, 4) + return __builtin_popcountll(val); +#else + val = (val & 0x5555555555555555ULL) + ((val >> 1) & 0x5555555555555555ULL); + val = (val & 0x3333333333333333ULL) + ((val >> 2) & 0x3333333333333333ULL); + val = (val & 0x0f0f0f0f0f0f0f0fULL) + ((val >> 4) & 0x0f0f0f0f0f0f0f0fULL); + val = (val & 0x00ff00ff00ff00ffULL) + ((val >> 8) & 0x00ff00ff00ff00ffULL); + val = (val & 0x0000ffff0000ffffULL) + ((val >> 16) & 0x0000ffff0000ffffULL); + val = (val & 0x00000000ffffffffULL) + ((val >> 32) & 0x00000000ffffffffULL); + + return val; +#endif +} |