2 * Utility compute operations used by translated code.
4 * Copyright (c) 2007 Aurelien Jarno
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7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
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27 /* Signed 64x64 -> 128 multiplication */
29 void muls64(int64_t *phigh, int64_t *plow, int64_t a, int64_t b)
31 #if defined(__x86_64__)
32 __asm__ ("imul %0\n\t"
33 : "=d" (*phigh), "=a" (*plow)
38 uint64_t pm1, pm2, pl;
40 pl = (uint64_t)((uint32_t)a) * (uint64_t)((uint32_t)b);
41 pm1 = (a >> 32) * (uint32_t)b;
42 pm2 = (uint32_t)a * (b >> 32);
43 ph = (a >> 32) * (b >> 32);
45 ph += (int64_t)pm1 >> 32;
46 ph += (int64_t)pm2 >> 32;
47 pm1 = (uint64_t)((uint32_t)pm1) + (uint64_t)((uint32_t)pm2) + (pl >> 32);
49 *phigh = ph + ((int64_t)pm1 >> 32);
50 *plow = (pm1 << 32) + (uint32_t)pl;
54 /* Unsigned 64x64 -> 128 multiplication */
55 void mulu64(uint64_t *phigh, uint64_t *plow, uint64_t a, uint64_t b)
57 #if defined(__x86_64__)
59 : "=d" (*phigh), "=a" (*plow)
63 uint64_t ph, pm1, pm2, pl;
65 pl = (uint64_t)((uint32_t)a) * (uint64_t)((uint32_t)b);
66 pm1 = (a >> 32) * (uint32_t)b;
67 pm2 = (uint32_t)a * (b >> 32);
68 ph = (a >> 32) * (b >> 32);
72 pm1 = (uint64_t)((uint32_t)pm1) + (uint64_t)((uint32_t)pm2) + (pl >> 32);
74 *phigh = ph + (pm1 >> 32);
75 *plow = (pm1 << 32) + (uint32_t)pl;