/*
* Helpers for integer and multimedia instructions.
*
* Copyright (c) 2007 Jocelyn Mayer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "qemu/host-utils.h"
uint64_t helper_zapnot(uint64_t val, uint64_t mskb)
{
uint64_t mask;
mask = -(mskb & 0x01) & 0x00000000000000ffull;
mask |= -(mskb & 0x02) & 0x000000000000ff00ull;
mask |= -(mskb & 0x04) & 0x0000000000ff0000ull;
mask |= -(mskb & 0x08) & 0x00000000ff000000ull;
mask |= -(mskb & 0x10) & 0x000000ff00000000ull;
mask |= -(mskb & 0x20) & 0x0000ff0000000000ull;
mask |= -(mskb & 0x40) & 0x00ff000000000000ull;
mask |= -(mskb & 0x80) & 0xff00000000000000ull;
return val & mask;
}
uint64_t helper_zap(uint64_t val, uint64_t mask)
{
return helper_zapnot(val, ~mask);
}
uint64_t helper_cmpbe0(uint64_t a)
{
uint64_t m = 0x7f7f7f7f7f7f7f7fULL;
uint64_t c = ~(((a & m) + m) | a | m);
/* a.......b.......c.......d.......e.......f.......g.......h....... */
c |= c << 7;
/* ab......bc......cd......de......ef......fg......gh......h....... */
c |= c << 14;
/* abcd....bcde....cdef....defg....efgh....fgh.....gh......h....... */
c |= c << 28;
/* abcdefghbcdefgh.cdefgh..defgh...efgh....fgh.....gh......h....... */
return c >> 56;
}
uint64_t helper_cmpbge(uint64_t a, uint64_t b)
{
uint64_t mask = 0x00ff00ff00ff00ffULL;
uint64_t test = 0x0100010001000100ULL;
uint64_t al, ah, bl, bh, cl, ch;
/* Separate the bytes to avoid false positives. */
al = a & mask;
bl = b & mask;
ah = (a >> 8) & mask;
bh = (b >> 8) & mask;
/* "Compare". If a byte in B is greater than a byte in A,
it will clear the test bit. */
cl = ((al | test) - bl) & test;
ch = ((ah | test) - bh) & test;
/* Fold all of the test bits into a contiguous set. */
/* ch=.......a...............c...............e...............g........ */
/* cl=.......b...............d...............f...............h........ */
cl += ch << 1;
/* cl=......ab..............cd..............ef..............gh........ */
cl |= cl << 14;
/* cl=......abcd............cdef............efgh............gh........ */
cl |= cl << 28;
/* cl=......abcdefgh........cdefgh..........efgh............gh........ */
return cl >> 50;
}
uint64_t helper_minub8(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
uint8_t opa, opb, opr;
int i;
for (i = 0; i < 8; ++i) {
opa = op1 >> (i * 8);
opb = op2 >> (i * 8);
opr = opa < opb ? opa : opb;
res |= (uint64_t)opr << (i * 8);
}
return res;
}
uint64_t helper_minsb8(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
int8_t opa, opb;
uint8_t opr;
int i;
for (i = 0; i < 8; ++i) {
opa = op1 >> (i * 8);
opb = op2 >> (i * 8);
opr = opa < opb ? opa : opb;
res |= (uint64_t)opr << (i * 8);
}
return res;
}
uint64_t helper_minuw4(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
uint16_t opa, opb, opr;
int i;
for (i = 0; i < 4; ++i) {
opa = op1 >> (i * 16);
opb = op2 >> (i * 16);
opr = opa < opb ? opa : opb;
res |= (uint64_t)opr << (i * 16);
}
return res;
}
uint64_t helper_minsw4(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
int16_t opa, opb;
uint16_t opr;
int i;
for (i = 0; i < 4; ++i) {
opa = op1 >> (i * 16);
opb = op2 >> (i * 16);
opr = opa < opb ? opa : opb;
res |= (uint64_t)opr << (i * 16);
}
return res;
}
uint64_t helper_maxub8(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
uint8_t opa, opb, opr;
int i;
for (i = 0; i < 8; ++i) {
opa = op1 >> (i * 8);
opb = op2 >> (i * 8);
opr = opa > opb ? opa : opb;
res |= (uint64_t)opr << (i * 8);
}
return res;
}
uint64_t helper_maxsb8(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
int8_t opa, opb;
uint8_t opr;
int i;
for (i = 0; i < 8; ++i) {
opa = op1 >> (i * 8);
opb = op2 >> (i * 8);
opr = opa > opb ? opa : opb;
res |= (uint64_t)opr << (i * 8);
}
return res;
}
uint64_t helper_maxuw4(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
uint16_t opa, opb, opr;
int i;
for (i = 0; i < 4; ++i) {
opa = op1 >> (i * 16);
opb = op2 >> (i * 16);
opr = opa > opb ? opa : opb;
res |= (uint64_t)opr << (i * 16);
}
return res;
}
uint64_t helper_maxsw4(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
int16_t opa, opb;
uint16_t opr;
int i;
for (i = 0; i < 4; ++i) {
opa = op1 >> (i * 16);
opb = op2 >> (i * 16);
opr = opa > opb ? opa : opb;
res |= (uint64_t)opr << (i * 16);
}
return res;
}
uint64_t helper_perr(uint64_t op1, uint64_t op2)
{
uint64_t res = 0;
uint8_t opa, opb, opr;
int i;
for (i = 0; i < 8; ++i) {
opa = op1 >> (i * 8);
opb = op2 >> (i * 8);
if (opa >= opb) {
opr = opa - opb;
} else {
opr = opb - opa;
}
res += opr;
}
return res;
}
uint64_t helper_pklb(uint64_t op1)
{
return (op1 & 0xff) | ((op1 >> 24) & 0xff00);
}
uint64_t helper_pkwb(uint64_t op1)
{
return ((op1 & 0xff)
| ((op1 >> 8) & 0xff00)
| ((op1 >> 16) & 0xff0000)
| ((op1 >> 24) & 0xff000000));
}
uint64_t helper_unpkbl(uint64_t op1)
{
return (op1 & 0xff) | ((op1 & 0xff00) << 24);
}
uint64_t helper_unpkbw(uint64_t op1)
{
return ((op1 & 0xff)
| ((op1 & 0xff00) << 8)
| ((op1 & 0xff0000) << 16)
| ((op1 & 0xff000000) << 24));
}
void helper_check_overflow(CPUAlphaState *env, uint64_t op1, uint64_t op2)
{
if (unlikely(op1 != op2)) {
arith_excp(env, GETPC(), EXC_M_IOV, 0);
}
}
