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-rw-r--r--target/alpha/int_helper.c280
1 files changed, 280 insertions, 0 deletions
diff --git a/target/alpha/int_helper.c b/target/alpha/int_helper.c
new file mode 100644
index 0000000..19bebfe
--- /dev/null
+++ b/target/alpha/int_helper.c
@@ -0,0 +1,280 @@
+/*
+ * 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 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_ctpop(uint64_t arg)
+{
+ return ctpop64(arg);
+}
+
+uint64_t helper_ctlz(uint64_t arg)
+{
+ return clz64(arg);
+}
+
+uint64_t helper_cttz(uint64_t arg)
+{
+ return ctz64(arg);
+}
+
+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);
+ }
+}
generated by cgit v1.1 at 2024-12-29 00:29:05 +0000