745 lines
14 KiB
C
745 lines
14 KiB
C
/*
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* Loongson Multimedia Instruction emulation helpers for QEMU.
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*
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* Copyright (c) 2011 Richard Henderson <rth@twiddle.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h"
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#include "helper.h"
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/* If the byte ordering doesn't matter, i.e. all columns are treated
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identically, then this union can be used directly. If byte ordering
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does matter, we generally ignore dumping to memory. */
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typedef union {
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uint8_t ub[8];
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int8_t sb[8];
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uint16_t uh[4];
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int16_t sh[4];
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uint32_t uw[2];
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int32_t sw[2];
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uint64_t d;
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} LMIValue;
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/* Some byte ordering issues can be mitigated by XORing in the following. */
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#ifdef HOST_WORDS_BIGENDIAN
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# define BYTE_ORDER_XOR(N) N
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#else
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# define BYTE_ORDER_XOR(N) 0
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#endif
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#define SATSB(x) (x < -0x80 ? -0x80 : x > 0x7f ? 0x7f : x)
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#define SATUB(x) (x > 0xff ? 0xff : x)
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#define SATSH(x) (x < -0x8000 ? -0x8000 : x > 0x7fff ? 0x7fff : x)
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#define SATUH(x) (x > 0xffff ? 0xffff : x)
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#define SATSW(x) \
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(x < -0x80000000ll ? -0x80000000ll : x > 0x7fffffff ? 0x7fffffff : x)
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#define SATUW(x) (x > 0xffffffffull ? 0xffffffffull : x)
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uint64_t helper_paddsb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 8; ++i) {
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int r = vs.sb[i] + vt.sb[i];
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vs.sb[i] = SATSB(r);
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}
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return vs.d;
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}
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uint64_t helper_paddusb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 8; ++i) {
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int r = vs.ub[i] + vt.ub[i];
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vs.ub[i] = SATUB(r);
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}
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return vs.d;
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}
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uint64_t helper_paddsh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; ++i) {
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int r = vs.sh[i] + vt.sh[i];
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vs.sh[i] = SATSH(r);
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}
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return vs.d;
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}
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uint64_t helper_paddush(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; ++i) {
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int r = vs.uh[i] + vt.uh[i];
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vs.uh[i] = SATUH(r);
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}
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return vs.d;
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}
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uint64_t helper_paddb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 8; ++i) {
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vs.ub[i] += vt.ub[i];
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}
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return vs.d;
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}
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uint64_t helper_paddh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; ++i) {
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vs.uh[i] += vt.uh[i];
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}
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return vs.d;
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}
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uint64_t helper_paddw(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 2; ++i) {
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vs.uw[i] += vt.uw[i];
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}
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return vs.d;
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}
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uint64_t helper_psubsb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 8; ++i) {
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int r = vs.sb[i] - vt.sb[i];
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vs.sb[i] = SATSB(r);
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}
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return vs.d;
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}
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uint64_t helper_psubusb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 8; ++i) {
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int r = vs.ub[i] - vt.ub[i];
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vs.ub[i] = SATUB(r);
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}
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return vs.d;
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}
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uint64_t helper_psubsh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; ++i) {
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int r = vs.sh[i] - vt.sh[i];
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vs.sh[i] = SATSH(r);
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}
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return vs.d;
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}
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uint64_t helper_psubush(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; ++i) {
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int r = vs.uh[i] - vt.uh[i];
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vs.uh[i] = SATUH(r);
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}
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return vs.d;
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}
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uint64_t helper_psubb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 8; ++i) {
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vs.ub[i] -= vt.ub[i];
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}
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return vs.d;
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}
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uint64_t helper_psubh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; ++i) {
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vs.uh[i] -= vt.uh[i];
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}
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return vs.d;
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}
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uint64_t helper_psubw(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned int i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 2; ++i) {
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vs.uw[i] -= vt.uw[i];
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}
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return vs.d;
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}
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uint64_t helper_pshufh(uint64_t fs, uint64_t ft)
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{
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unsigned host = BYTE_ORDER_XOR(3);
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LMIValue vd, vs;
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unsigned i;
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vs.d = fs;
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vd.d = 0;
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for (i = 0; i < 4; i++, ft >>= 2) {
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vd.uh[i ^ host] = vs.uh[(ft & 3) ^ host];
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}
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return vd.d;
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}
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uint64_t helper_packsswh(uint64_t fs, uint64_t ft)
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{
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uint64_t fd = 0;
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int64_t tmp;
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tmp = (int32_t)(fs >> 0);
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tmp = SATSH(tmp);
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fd |= (tmp & 0xffff) << 0;
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tmp = (int32_t)(fs >> 32);
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tmp = SATSH(tmp);
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fd |= (tmp & 0xffff) << 16;
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tmp = (int32_t)(ft >> 0);
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tmp = SATSH(tmp);
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fd |= (tmp & 0xffff) << 32;
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tmp = (int32_t)(ft >> 32);
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tmp = SATSH(tmp);
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fd |= (tmp & 0xffff) << 48;
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return fd;
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}
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uint64_t helper_packsshb(uint64_t fs, uint64_t ft)
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{
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uint64_t fd = 0;
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unsigned int i;
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for (i = 0; i < 4; ++i) {
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int16_t tmp = fs >> (i * 16);
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tmp = SATSB(tmp);
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fd |= (uint64_t)(tmp & 0xff) << (i * 8);
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}
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for (i = 0; i < 4; ++i) {
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int16_t tmp = ft >> (i * 16);
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tmp = SATSB(tmp);
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fd |= (uint64_t)(tmp & 0xff) << (i * 8 + 32);
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}
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return fd;
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}
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uint64_t helper_packushb(uint64_t fs, uint64_t ft)
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{
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uint64_t fd = 0;
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unsigned int i;
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for (i = 0; i < 4; ++i) {
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int16_t tmp = fs >> (i * 16);
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tmp = SATUB(tmp);
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fd |= (uint64_t)(tmp & 0xff) << (i * 8);
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}
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for (i = 0; i < 4; ++i) {
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int16_t tmp = ft >> (i * 16);
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tmp = SATUB(tmp);
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fd |= (uint64_t)(tmp & 0xff) << (i * 8 + 32);
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}
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return fd;
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}
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uint64_t helper_punpcklwd(uint64_t fs, uint64_t ft)
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{
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return (fs & 0xffffffff) | (ft << 32);
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}
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uint64_t helper_punpckhwd(uint64_t fs, uint64_t ft)
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{
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return (fs >> 32) | (ft & ~0xffffffffull);
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}
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uint64_t helper_punpcklhw(uint64_t fs, uint64_t ft)
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{
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unsigned host = BYTE_ORDER_XOR(3);
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LMIValue vd, vs, vt;
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vs.d = fs;
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vt.d = ft;
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vd.uh[0 ^ host] = vs.uh[0 ^ host];
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vd.uh[1 ^ host] = vt.uh[0 ^ host];
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vd.uh[2 ^ host] = vs.uh[1 ^ host];
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vd.uh[3 ^ host] = vt.uh[1 ^ host];
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return vd.d;
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}
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uint64_t helper_punpckhhw(uint64_t fs, uint64_t ft)
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{
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unsigned host = BYTE_ORDER_XOR(3);
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LMIValue vd, vs, vt;
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vs.d = fs;
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vt.d = ft;
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vd.uh[0 ^ host] = vs.uh[2 ^ host];
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vd.uh[1 ^ host] = vt.uh[2 ^ host];
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vd.uh[2 ^ host] = vs.uh[3 ^ host];
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vd.uh[3 ^ host] = vt.uh[3 ^ host];
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return vd.d;
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}
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uint64_t helper_punpcklbh(uint64_t fs, uint64_t ft)
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{
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unsigned host = BYTE_ORDER_XOR(7);
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LMIValue vd, vs, vt;
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vs.d = fs;
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vt.d = ft;
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vd.ub[0 ^ host] = vs.ub[0 ^ host];
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vd.ub[1 ^ host] = vt.ub[0 ^ host];
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vd.ub[2 ^ host] = vs.ub[1 ^ host];
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vd.ub[3 ^ host] = vt.ub[1 ^ host];
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vd.ub[4 ^ host] = vs.ub[2 ^ host];
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vd.ub[5 ^ host] = vt.ub[2 ^ host];
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vd.ub[6 ^ host] = vs.ub[3 ^ host];
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vd.ub[7 ^ host] = vt.ub[3 ^ host];
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return vd.d;
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}
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uint64_t helper_punpckhbh(uint64_t fs, uint64_t ft)
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{
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unsigned host = BYTE_ORDER_XOR(7);
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LMIValue vd, vs, vt;
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vs.d = fs;
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vt.d = ft;
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vd.ub[0 ^ host] = vs.ub[4 ^ host];
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vd.ub[1 ^ host] = vt.ub[4 ^ host];
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vd.ub[2 ^ host] = vs.ub[5 ^ host];
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vd.ub[3 ^ host] = vt.ub[5 ^ host];
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vd.ub[4 ^ host] = vs.ub[6 ^ host];
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vd.ub[5 ^ host] = vt.ub[6 ^ host];
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vd.ub[6 ^ host] = vs.ub[7 ^ host];
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vd.ub[7 ^ host] = vt.ub[7 ^ host];
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return vd.d;
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}
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uint64_t helper_pavgh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; i++) {
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vs.uh[i] = (vs.uh[i] + vt.uh[i] + 1) >> 1;
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}
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return vs.d;
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}
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uint64_t helper_pavgb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 8; i++) {
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vs.ub[i] = (vs.ub[i] + vt.ub[i] + 1) >> 1;
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}
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return vs.d;
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}
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uint64_t helper_pmaxsh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; i++) {
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vs.sh[i] = (vs.sh[i] >= vt.sh[i] ? vs.sh[i] : vt.sh[i]);
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}
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return vs.d;
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}
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uint64_t helper_pminsh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; i++) {
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vs.sh[i] = (vs.sh[i] <= vt.sh[i] ? vs.sh[i] : vt.sh[i]);
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}
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return vs.d;
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}
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uint64_t helper_pmaxub(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; i++) {
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vs.ub[i] = (vs.ub[i] >= vt.ub[i] ? vs.ub[i] : vt.ub[i]);
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}
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return vs.d;
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}
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uint64_t helper_pminub(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; i++) {
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vs.ub[i] = (vs.ub[i] <= vt.ub[i] ? vs.ub[i] : vt.ub[i]);
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}
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return vs.d;
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}
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uint64_t helper_pcmpeqw(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 2; i++) {
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vs.uw[i] = -(vs.uw[i] == vt.uw[i]);
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}
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return vs.d;
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}
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uint64_t helper_pcmpgtw(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 2; i++) {
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vs.uw[i] = -(vs.uw[i] > vt.uw[i]);
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}
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return vs.d;
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}
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uint64_t helper_pcmpeqh(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; i++) {
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vs.uh[i] = -(vs.uh[i] == vt.uh[i]);
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}
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return vs.d;
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}
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uint64_t helper_pcmpgth(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
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unsigned i;
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vs.d = fs;
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vt.d = ft;
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for (i = 0; i < 4; i++) {
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vs.uh[i] = -(vs.uh[i] > vt.uh[i]);
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}
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return vs.d;
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}
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uint64_t helper_pcmpeqb(uint64_t fs, uint64_t ft)
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{
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LMIValue vs, vt;
|
|
unsigned i;
|
|
|
|
vs.d = fs;
|
|
vt.d = ft;
|
|
for (i = 0; i < 8; i++) {
|
|
vs.ub[i] = -(vs.ub[i] == vt.ub[i]);
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_pcmpgtb(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs, vt;
|
|
unsigned i;
|
|
|
|
vs.d = fs;
|
|
vt.d = ft;
|
|
for (i = 0; i < 8; i++) {
|
|
vs.ub[i] = -(vs.ub[i] > vt.ub[i]);
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_psllw(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs;
|
|
unsigned i;
|
|
|
|
ft &= 0x7f;
|
|
if (ft > 31) {
|
|
return 0;
|
|
}
|
|
vs.d = fs;
|
|
for (i = 0; i < 2; ++i) {
|
|
vs.uw[i] <<= ft;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_psrlw(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs;
|
|
unsigned i;
|
|
|
|
ft &= 0x7f;
|
|
if (ft > 31) {
|
|
return 0;
|
|
}
|
|
vs.d = fs;
|
|
for (i = 0; i < 2; ++i) {
|
|
vs.uw[i] >>= ft;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_psraw(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs;
|
|
unsigned i;
|
|
|
|
ft &= 0x7f;
|
|
if (ft > 31) {
|
|
ft = 31;
|
|
}
|
|
vs.d = fs;
|
|
for (i = 0; i < 2; ++i) {
|
|
vs.sw[i] >>= ft;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_psllh(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs;
|
|
unsigned i;
|
|
|
|
ft &= 0x7f;
|
|
if (ft > 15) {
|
|
return 0;
|
|
}
|
|
vs.d = fs;
|
|
for (i = 0; i < 4; ++i) {
|
|
vs.uh[i] <<= ft;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_psrlh(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs;
|
|
unsigned i;
|
|
|
|
ft &= 0x7f;
|
|
if (ft > 15) {
|
|
return 0;
|
|
}
|
|
vs.d = fs;
|
|
for (i = 0; i < 4; ++i) {
|
|
vs.uh[i] >>= ft;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_psrah(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs;
|
|
unsigned i;
|
|
|
|
ft &= 0x7f;
|
|
if (ft > 15) {
|
|
ft = 15;
|
|
}
|
|
vs.d = fs;
|
|
for (i = 0; i < 4; ++i) {
|
|
vs.sh[i] >>= ft;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_pmullh(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs, vt;
|
|
unsigned i;
|
|
|
|
vs.d = fs;
|
|
vt.d = ft;
|
|
for (i = 0; i < 4; ++i) {
|
|
vs.sh[i] *= vt.sh[i];
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_pmulhh(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs, vt;
|
|
unsigned i;
|
|
|
|
vs.d = fs;
|
|
vt.d = ft;
|
|
for (i = 0; i < 4; ++i) {
|
|
int32_t r = vs.sh[i] * vt.sh[i];
|
|
vs.sh[i] = r >> 16;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_pmulhuh(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs, vt;
|
|
unsigned i;
|
|
|
|
vs.d = fs;
|
|
vt.d = ft;
|
|
for (i = 0; i < 4; ++i) {
|
|
uint32_t r = vs.uh[i] * vt.uh[i];
|
|
vs.uh[i] = r >> 16;
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_pmaddhw(uint64_t fs, uint64_t ft)
|
|
{
|
|
unsigned host = BYTE_ORDER_XOR(3);
|
|
LMIValue vs, vt;
|
|
uint32_t p0, p1;
|
|
|
|
vs.d = fs;
|
|
vt.d = ft;
|
|
p0 = vs.sh[0 ^ host] * vt.sh[0 ^ host];
|
|
p0 += vs.sh[1 ^ host] * vt.sh[1 ^ host];
|
|
p1 = vs.sh[2 ^ host] * vt.sh[2 ^ host];
|
|
p1 += vs.sh[3 ^ host] * vt.sh[3 ^ host];
|
|
|
|
return ((uint64_t)p1 << 32) | p0;
|
|
}
|
|
|
|
uint64_t helper_pasubub(uint64_t fs, uint64_t ft)
|
|
{
|
|
LMIValue vs, vt;
|
|
unsigned i;
|
|
|
|
vs.d = fs;
|
|
vt.d = ft;
|
|
for (i = 0; i < 8; ++i) {
|
|
int r = vs.ub[i] - vt.ub[i];
|
|
vs.ub[i] = (r < 0 ? -r : r);
|
|
}
|
|
return vs.d;
|
|
}
|
|
|
|
uint64_t helper_biadd(uint64_t fs)
|
|
{
|
|
unsigned i, fd;
|
|
|
|
for (i = fd = 0; i < 8; ++i) {
|
|
fd += (fs >> (i * 8)) & 0xff;
|
|
}
|
|
return fd & 0xffff;
|
|
}
|
|
|
|
uint64_t helper_pmovmskb(uint64_t fs)
|
|
{
|
|
unsigned fd = 0;
|
|
|
|
fd |= ((fs >> 7) & 1) << 0;
|
|
fd |= ((fs >> 15) & 1) << 1;
|
|
fd |= ((fs >> 23) & 1) << 2;
|
|
fd |= ((fs >> 31) & 1) << 3;
|
|
fd |= ((fs >> 39) & 1) << 4;
|
|
fd |= ((fs >> 47) & 1) << 5;
|
|
fd |= ((fs >> 55) & 1) << 6;
|
|
fd |= ((fs >> 63) & 1) << 7;
|
|
|
|
return fd & 0xff;
|
|
}
|