2007-10-27 15:05:54 +02:00
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*/
|
2012-12-06 12:15:58 +01:00
|
|
|
#ifndef HOST_UTILS_H
|
|
|
|
#define HOST_UTILS_H 1
|
2007-10-27 15:05:54 +02:00
|
|
|
|
2012-12-17 18:20:00 +01:00
|
|
|
#include "qemu/compiler.h" /* QEMU_GNUC_PREREQ */
|
2013-02-14 02:47:34 +01:00
|
|
|
#include <limits.h>
|
2008-06-06 00:55:54 +02:00
|
|
|
|
2013-02-16 21:46:59 +01:00
|
|
|
#ifdef CONFIG_INT128
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline void mulu64(uint64_t *plow, uint64_t *phigh,
|
|
|
|
uint64_t a, uint64_t b)
|
2007-11-04 03:24:58 +01:00
|
|
|
{
|
2013-02-16 21:46:59 +01:00
|
|
|
__uint128_t r = (__uint128_t)a * b;
|
|
|
|
*plow = r;
|
|
|
|
*phigh = r >> 64;
|
2007-11-04 03:24:58 +01:00
|
|
|
}
|
2013-02-16 21:46:59 +01:00
|
|
|
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline void muls64(uint64_t *plow, uint64_t *phigh,
|
|
|
|
int64_t a, int64_t b)
|
2007-11-04 03:24:58 +01:00
|
|
|
{
|
2013-02-16 21:46:59 +01:00
|
|
|
__int128_t r = (__int128_t)a * b;
|
|
|
|
*plow = r;
|
|
|
|
*phigh = r >> 64;
|
2007-11-04 03:24:58 +01:00
|
|
|
}
|
|
|
|
#else
|
2007-11-05 14:16:23 +01:00
|
|
|
void muls64(uint64_t *phigh, uint64_t *plow, int64_t a, int64_t b);
|
2007-11-04 03:24:58 +01:00
|
|
|
void mulu64(uint64_t *phigh, uint64_t *plow, uint64_t a, uint64_t b);
|
|
|
|
#endif
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* clz32 - count leading zeros in a 32-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 32 if the value is zero. Note that the GCC builtin is
|
|
|
|
* undefined if the value is zero.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int clz32(uint32_t val)
|
2007-10-27 15:05:54 +02:00
|
|
|
{
|
2008-10-12 18:15:04 +02:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
2013-02-14 02:47:35 +01:00
|
|
|
return val ? __builtin_clz(val) : 32;
|
2008-10-12 02:53:08 +02:00
|
|
|
#else
|
2013-02-14 02:47:35 +01:00
|
|
|
/* Binary search for the leading one bit. */
|
2007-10-27 15:05:54 +02:00
|
|
|
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;
|
2008-10-12 02:53:08 +02:00
|
|
|
#endif
|
2007-10-27 15:05:54 +02:00
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* clo32 - count leading ones in a 32-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 32 if the value is -1.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int clo32(uint32_t val)
|
2007-10-27 15:05:54 +02:00
|
|
|
{
|
|
|
|
return clz32(~val);
|
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* clz64 - count leading zeros in a 64-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 64 if the value is zero. Note that the GCC builtin is
|
|
|
|
* undefined if the value is zero.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int clz64(uint64_t val)
|
2007-10-27 15:05:54 +02:00
|
|
|
{
|
2008-10-12 18:15:04 +02:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
2013-02-14 02:47:35 +01:00
|
|
|
return val ? __builtin_clzll(val) : 64;
|
2008-10-12 02:53:08 +02:00
|
|
|
#else
|
2007-10-27 15:05:54 +02:00
|
|
|
int cnt = 0;
|
|
|
|
|
2007-11-04 03:24:58 +01:00
|
|
|
if (!(val >> 32)) {
|
2007-10-27 15:05:54 +02:00
|
|
|
cnt += 32;
|
2007-11-04 03:24:58 +01:00
|
|
|
} else {
|
|
|
|
val >>= 32;
|
2007-10-27 15:05:54 +02:00
|
|
|
}
|
2007-11-04 03:24:58 +01:00
|
|
|
|
|
|
|
return cnt + clz32(val);
|
2008-10-12 02:53:08 +02:00
|
|
|
#endif
|
2007-10-27 15:05:54 +02:00
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* clo64 - count leading ones in a 64-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 64 if the value is -1.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int clo64(uint64_t val)
|
2007-10-27 15:05:54 +02:00
|
|
|
{
|
|
|
|
return clz64(~val);
|
|
|
|
}
|
2007-10-28 13:52:38 +01:00
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* ctz32 - count trailing zeros in a 32-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 32 if the value is zero. Note that the GCC builtin is
|
|
|
|
* undefined if the value is zero.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int ctz32(uint32_t val)
|
2007-10-28 13:52:38 +01:00
|
|
|
{
|
2008-10-12 18:15:04 +02:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
2013-02-14 02:47:35 +01:00
|
|
|
return val ? __builtin_ctz(val) : 32;
|
2008-10-12 02:53:08 +02:00
|
|
|
#else
|
2013-02-14 02:47:35 +01:00
|
|
|
/* Binary search for the trailing one bit. */
|
2007-10-28 13:52:38 +01:00
|
|
|
int cnt;
|
|
|
|
|
|
|
|
cnt = 0;
|
|
|
|
if (!(val & 0x0000FFFFUL)) {
|
2008-11-12 18:18:41 +01:00
|
|
|
cnt += 16;
|
2007-10-28 13:52:38 +01:00
|
|
|
val >>= 16;
|
2008-11-12 18:18:41 +01:00
|
|
|
}
|
2007-10-28 13:52:38 +01:00
|
|
|
if (!(val & 0x000000FFUL)) {
|
2008-11-12 18:18:41 +01:00
|
|
|
cnt += 8;
|
2007-10-28 13:52:38 +01:00
|
|
|
val >>= 8;
|
2008-11-12 18:18:41 +01:00
|
|
|
}
|
2007-10-28 13:52:38 +01:00
|
|
|
if (!(val & 0x0000000FUL)) {
|
2008-11-12 18:18:41 +01:00
|
|
|
cnt += 4;
|
2007-10-28 13:52:38 +01:00
|
|
|
val >>= 4;
|
2008-11-12 18:18:41 +01:00
|
|
|
}
|
2007-10-28 13:52:38 +01:00
|
|
|
if (!(val & 0x00000003UL)) {
|
2008-11-12 18:18:41 +01:00
|
|
|
cnt += 2;
|
2007-10-28 13:52:38 +01:00
|
|
|
val >>= 2;
|
2008-11-12 18:18:41 +01:00
|
|
|
}
|
2007-10-28 13:52:38 +01:00
|
|
|
if (!(val & 0x00000001UL)) {
|
2008-11-12 18:18:41 +01:00
|
|
|
cnt++;
|
2007-10-28 13:52:38 +01:00
|
|
|
val >>= 1;
|
2008-11-12 18:18:41 +01:00
|
|
|
}
|
2007-10-28 13:52:38 +01:00
|
|
|
if (!(val & 0x00000001UL)) {
|
2008-11-12 18:18:41 +01:00
|
|
|
cnt++;
|
|
|
|
}
|
2007-10-28 13:52:38 +01:00
|
|
|
|
2008-11-12 18:18:41 +01:00
|
|
|
return cnt;
|
2008-10-12 02:53:08 +02:00
|
|
|
#endif
|
2008-11-12 18:18:41 +01:00
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* cto32 - count trailing ones in a 32-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 32 if the value is -1.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int cto32(uint32_t val)
|
2008-11-12 18:18:41 +01:00
|
|
|
{
|
2007-10-28 13:52:38 +01:00
|
|
|
return ctz32(~val);
|
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* ctz64 - count trailing zeros in a 64-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 64 if the value is zero. Note that the GCC builtin is
|
|
|
|
* undefined if the value is zero.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int ctz64(uint64_t val)
|
2007-10-28 13:52:38 +01:00
|
|
|
{
|
2008-10-12 18:15:04 +02:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
2013-02-14 02:47:35 +01:00
|
|
|
return val ? __builtin_ctzll(val) : 64;
|
2008-10-12 02:53:08 +02:00
|
|
|
#else
|
2007-10-28 13:52:38 +01:00
|
|
|
int cnt;
|
|
|
|
|
|
|
|
cnt = 0;
|
|
|
|
if (!((uint32_t)val)) {
|
|
|
|
cnt += 32;
|
|
|
|
val >>= 32;
|
|
|
|
}
|
|
|
|
|
|
|
|
return cnt + ctz32(val);
|
2008-10-12 02:53:08 +02:00
|
|
|
#endif
|
2007-10-28 13:52:38 +01:00
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* ctz64 - count trailing ones in a 64-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns 64 if the value is -1.
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int cto64(uint64_t val)
|
2007-10-28 13:52:38 +01:00
|
|
|
{
|
|
|
|
return ctz64(~val);
|
|
|
|
}
|
|
|
|
|
2013-12-17 20:42:35 +01:00
|
|
|
/**
|
|
|
|
* clrsb32 - count leading redundant sign bits in a 32-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns the number of bits following the sign bit that are equal to it.
|
|
|
|
* No special cases; output range is [0-31].
|
|
|
|
*/
|
|
|
|
static inline int clrsb32(uint32_t val)
|
|
|
|
{
|
|
|
|
#if QEMU_GNUC_PREREQ(4, 7)
|
|
|
|
return __builtin_clrsb(val);
|
|
|
|
#else
|
|
|
|
return clz32(val ^ ((int32_t)val >> 1)) - 1;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* clrsb64 - count leading redundant sign bits in a 64-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*
|
|
|
|
* Returns the number of bits following the sign bit that are equal to it.
|
|
|
|
* No special cases; output range is [0-63].
|
|
|
|
*/
|
|
|
|
static inline int clrsb64(uint64_t val)
|
|
|
|
{
|
|
|
|
#if QEMU_GNUC_PREREQ(4, 7)
|
|
|
|
return __builtin_clrsbll(val);
|
|
|
|
#else
|
|
|
|
return clz64(val ^ ((int64_t)val >> 1)) - 1;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* ctpop8 - count the population of one bits in an 8-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int ctpop8(uint8_t val)
|
2007-10-28 13:52:38 +01:00
|
|
|
{
|
2013-02-14 02:47:35 +01:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
|
|
|
return __builtin_popcount(val);
|
|
|
|
#else
|
2007-10-28 13:52:38 +01:00
|
|
|
val = (val & 0x55) + ((val >> 1) & 0x55);
|
|
|
|
val = (val & 0x33) + ((val >> 2) & 0x33);
|
|
|
|
val = (val & 0x0f) + ((val >> 4) & 0x0f);
|
|
|
|
|
|
|
|
return val;
|
2013-02-14 02:47:35 +01:00
|
|
|
#endif
|
2007-10-28 13:52:38 +01:00
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* ctpop16 - count the population of one bits in a 16-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int ctpop16(uint16_t val)
|
2007-10-28 13:52:38 +01:00
|
|
|
{
|
2013-02-14 02:47:35 +01:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
|
|
|
return __builtin_popcount(val);
|
|
|
|
#else
|
2007-10-28 13:52:38 +01:00
|
|
|
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;
|
2013-02-14 02:47:35 +01:00
|
|
|
#endif
|
2007-10-28 13:52:38 +01:00
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* ctpop32 - count the population of one bits in a 32-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int ctpop32(uint32_t val)
|
2007-10-28 13:52:38 +01:00
|
|
|
{
|
2008-10-12 18:15:04 +02:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
2008-10-12 02:53:08 +02:00
|
|
|
return __builtin_popcount(val);
|
|
|
|
#else
|
2007-10-28 13:52:38 +01:00
|
|
|
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;
|
2008-10-12 02:53:08 +02:00
|
|
|
#endif
|
2007-10-28 13:52:38 +01:00
|
|
|
}
|
|
|
|
|
2013-02-14 02:47:35 +01:00
|
|
|
/**
|
|
|
|
* ctpop64 - count the population of one bits in a 64-bit value.
|
|
|
|
* @val: The value to search
|
|
|
|
*/
|
2009-08-16 10:03:26 +02:00
|
|
|
static inline int ctpop64(uint64_t val)
|
2007-10-28 13:52:38 +01:00
|
|
|
{
|
2008-10-12 18:15:04 +02:00
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
2008-10-12 02:53:08 +02:00
|
|
|
return __builtin_popcountll(val);
|
|
|
|
#else
|
2007-10-28 13:52:38 +01:00
|
|
|
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;
|
2008-10-12 02:53:08 +02:00
|
|
|
#endif
|
2007-12-18 02:58:05 +01:00
|
|
|
}
|
2012-12-06 12:15:58 +01:00
|
|
|
|
2013-02-14 02:47:34 +01:00
|
|
|
/* Host type specific sizes of these routines. */
|
|
|
|
|
|
|
|
#if ULONG_MAX == UINT32_MAX
|
|
|
|
# define clzl clz32
|
|
|
|
# define ctzl ctz32
|
|
|
|
# define clol clo32
|
|
|
|
# define ctol cto32
|
|
|
|
# define ctpopl ctpop32
|
|
|
|
#elif ULONG_MAX == UINT64_MAX
|
|
|
|
# define clzl clz64
|
|
|
|
# define ctzl ctz64
|
|
|
|
# define clol clo64
|
|
|
|
# define ctol cto64
|
|
|
|
# define ctpopl ctpop64
|
|
|
|
#else
|
|
|
|
# error Unknown sizeof long
|
|
|
|
#endif
|
|
|
|
|
2012-12-06 12:15:58 +01:00
|
|
|
#endif
|