/* * Utility compute operations used by translated code. * * Copyright (c) 2003 Fabrice Bellard * Copyright (c) 2007 Aurelien Jarno * * 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 "exec.h"#include "host-utils.h"//#define DEBUG_MULDIV/* Long integer helpers */#if !defined(__x86_64__)static void add128 (uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b){    *plow += a;    /* carry test */    if (*plow < a)        (*phigh)++;    *phigh += b;}static void neg128 (uint64_t *plow, uint64_t *phigh){    *plow = ~*plow;    *phigh = ~*phigh;    add128(plow, phigh, 1, 0);}static void mul64 (uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b){    uint32_t a0, a1, b0, b1;    uint64_t v;    a0 = a;    a1 = a >> 32;    b0 = b;    b1 = b >> 32;    v = (uint64_t)a0 * (uint64_t)b0;    *plow = v;    *phigh = 0;    v = (uint64_t)a0 * (uint64_t)b1;    add128(plow, phigh, v << 32, v >> 32);    v = (uint64_t)a1 * (uint64_t)b0;    add128(plow, phigh, v << 32, v >> 32);    v = (uint64_t)a1 * (uint64_t)b1;    *phigh += v;}/* Unsigned 64x64 -> 128 multiplication */void mulu64 (uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b){    mul64(plow, phigh, a, b);#if defined(DEBUG_MULDIV)    printf("mulu64: 0x%016llx * 0x%016llx = 0x%016llx%016llx\n",           a, b, *phigh, *plow);#endif}/* Signed 64x64 -> 128 multiplication */void muls64 (uint64_t *plow, uint64_t *phigh, int64_t a, int64_t b){    int sa, sb;    sa = (a < 0);    if (sa)        a = -a;    sb = (b < 0);    if (sb)        b = -b;    mul64(plow, phigh, a, b);    if (sa ^ sb) {        neg128(plow, phigh);    }#if defined(DEBUG_MULDIV)    printf("muls64: 0x%016llx * 0x%016llx = 0x%016llx%016llx\n",           a, b, *phigh, *plow);#endif}#endif /* !defined(__x86_64__) */