2 * Utility compute operations used by translated code.
4 * Copyright (c) 2007 Thiemo Seufer
5 * Copyright (c) 2007 Jocelyn Mayer
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 #if defined(__x86_64__)
29 #define __HAVE_FAST_MULU64__
30 static always_inline void mulu64 (uint64_t *plow, uint64_t *phigh,
31 uint64_t a, uint64_t b)
34 : "=d" (*phigh), "=a" (*plow)
37 #define __HAVE_FAST_MULS64__
38 static always_inline void muls64 (uint64_t *plow, uint64_t *phigh,
41 __asm__ ("imul %0\n\t"
42 : "=d" (*phigh), "=a" (*plow)
46 void muls64(uint64_t *phigh, uint64_t *plow, int64_t a, int64_t b);
47 void mulu64(uint64_t *phigh, uint64_t *plow, uint64_t a, uint64_t b);
50 /* Note that some of those functions may end up calling libgcc functions,
51 depending on the host machine. It is up to the target emulation to
54 /* Binary search for leading zeros. */
56 static always_inline int clz32(uint32_t val)
60 if (!(val & 0xFFFF0000U)) {
64 if (!(val & 0xFF000000U)) {
68 if (!(val & 0xF0000000U)) {
72 if (!(val & 0xC0000000U)) {
76 if (!(val & 0x80000000U)) {
80 if (!(val & 0x80000000U)) {
86 static always_inline int clo32(uint32_t val)
91 static always_inline int clz64(uint64_t val)
101 return cnt + clz32(val);
104 static always_inline int clo64(uint64_t val)
109 static always_inline int ctz32 (uint32_t val)
114 if (!(val & 0x0000FFFFUL)) {
118 if (!(val & 0x000000FFUL)) {
122 if (!(val & 0x0000000FUL)) {
126 if (!(val & 0x00000003UL)) {
130 if (!(val & 0x00000001UL)) {
134 if (!(val & 0x00000001UL)) {
141 static always_inline int cto32 (uint32_t val)
146 static always_inline int ctz64 (uint64_t val)
151 if (!((uint32_t)val)) {
156 return cnt + ctz32(val);
159 static always_inline int cto64 (uint64_t val)
164 static always_inline int ctpop8 (uint8_t val)
166 val = (val & 0x55) + ((val >> 1) & 0x55);
167 val = (val & 0x33) + ((val >> 2) & 0x33);
168 val = (val & 0x0f) + ((val >> 4) & 0x0f);
173 static always_inline int ctpop16 (uint16_t val)
175 val = (val & 0x5555) + ((val >> 1) & 0x5555);
176 val = (val & 0x3333) + ((val >> 2) & 0x3333);
177 val = (val & 0x0f0f) + ((val >> 4) & 0x0f0f);
178 val = (val & 0x00ff) + ((val >> 8) & 0x00ff);
183 static always_inline int ctpop32 (uint32_t val)
185 val = (val & 0x55555555) + ((val >> 1) & 0x55555555);
186 val = (val & 0x33333333) + ((val >> 2) & 0x33333333);
187 val = (val & 0x0f0f0f0f) + ((val >> 4) & 0x0f0f0f0f);
188 val = (val & 0x00ff00ff) + ((val >> 8) & 0x00ff00ff);
189 val = (val & 0x0000ffff) + ((val >> 16) & 0x0000ffff);
194 static always_inline int ctpop64 (uint64_t val)
196 val = (val & 0x5555555555555555ULL) + ((val >> 1) & 0x5555555555555555ULL);
197 val = (val & 0x3333333333333333ULL) + ((val >> 2) & 0x3333333333333333ULL);
198 val = (val & 0x0f0f0f0f0f0f0f0fULL) + ((val >> 4) & 0x0f0f0f0f0f0f0f0fULL);
199 val = (val & 0x00ff00ff00ff00ffULL) + ((val >> 8) & 0x00ff00ff00ff00ffULL);
200 val = (val & 0x0000ffff0000ffffULL) + ((val >> 16) & 0x0000ffff0000ffffULL);
201 val = (val & 0x00000000ffffffffULL) + ((val >> 32) & 0x00000000ffffffffULL);