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-rw-r--r--target/tilegx/helper.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/target/tilegx/helper.c b/target/tilegx/helper.c
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+/*
+ * QEMU TILE-Gx helpers
+ *
+ * Copyright (c) 2015 Chen Gang
+ *
+ * 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/lgpl-2.1.html>
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/exec-all.h"
+#include "qemu-common.h"
+#include "exec/helper-proto.h"
+#include <zlib.h> /* For crc32 */
+#include "syscall_defs.h"
+
+void helper_exception(CPUTLGState *env, uint32_t excp)
+{
+ CPUState *cs = CPU(tilegx_env_get_cpu(env));
+
+ cs->exception_index = excp;
+ cpu_loop_exit(cs);
+}
+
+void helper_ext01_ics(CPUTLGState *env)
+{
+ uint64_t val = env->spregs[TILEGX_SPR_EX_CONTEXT_0_1];
+
+ switch (val) {
+ case 0:
+ case 1:
+ env->spregs[TILEGX_SPR_CRITICAL_SEC] = val;
+ break;
+ default:
+#if defined(CONFIG_USER_ONLY)
+ env->signo = TARGET_SIGILL;
+ env->sigcode = TARGET_ILL_ILLOPC;
+ helper_exception(env, TILEGX_EXCP_SIGNAL);
+#else
+ helper_exception(env, TILEGX_EXCP_OPCODE_UNIMPLEMENTED);
+#endif
+ break;
+ }
+}
+
+uint64_t helper_cntlz(uint64_t arg)
+{
+ return clz64(arg);
+}
+
+uint64_t helper_cnttz(uint64_t arg)
+{
+ return ctz64(arg);
+}
+
+uint64_t helper_pcnt(uint64_t arg)
+{
+ return ctpop64(arg);
+}
+
+uint64_t helper_revbits(uint64_t arg)
+{
+ return revbit64(arg);
+}
+
+/*
+ * Functional Description
+ * uint64_t a = rf[SrcA];
+ * uint64_t b = rf[SrcB];
+ * uint64_t d = rf[Dest];
+ * uint64_t output = 0;
+ * unsigned int counter;
+ * for (counter = 0; counter < (WORD_SIZE / BYTE_SIZE); counter++)
+ * {
+ * int sel = getByte (b, counter) & 0xf;
+ * uint8_t byte = (sel < 8) ? getByte (d, sel) : getByte (a, (sel - 8));
+ * output = setByte (output, counter, byte);
+ * }
+ * rf[Dest] = output;
+ */
+uint64_t helper_shufflebytes(uint64_t dest, uint64_t srca, uint64_t srcb)
+{
+ uint64_t vdst = 0;
+ int count;
+
+ for (count = 0; count < 64; count += 8) {
+ uint64_t sel = srcb >> count;
+ uint64_t src = (sel & 8) ? srca : dest;
+ vdst |= extract64(src, (sel & 7) * 8, 8) << count;
+ }
+
+ return vdst;
+}
+
+uint64_t helper_crc32_8(uint64_t accum, uint64_t input)
+{
+ uint8_t buf = input;
+
+ /* zlib crc32 converts the accumulator and output to one's complement. */
+ return crc32(accum ^ 0xffffffff, &buf, 1) ^ 0xffffffff;
+}
+
+uint64_t helper_crc32_32(uint64_t accum, uint64_t input)
+{
+ uint8_t buf[4];
+
+ stl_le_p(buf, input);
+
+ /* zlib crc32 converts the accumulator and output to one's complement. */
+ return crc32(accum ^ 0xffffffff, buf, 4) ^ 0xffffffff;
+}
+
+uint64_t helper_cmula(uint64_t srcd, uint64_t srca, uint64_t srcb)
+{
+ uint32_t reala = (int16_t)srca;
+ uint32_t imaga = (int16_t)(srca >> 16);
+ uint32_t realb = (int16_t)srcb;
+ uint32_t imagb = (int16_t)(srcb >> 16);
+ uint32_t reald = srcd;
+ uint32_t imagd = srcd >> 32;
+ uint32_t realr = reala * realb - imaga * imagb + reald;
+ uint32_t imagr = reala * imagb + imaga * realb + imagd;
+
+ return deposit64(realr, 32, 32, imagr);
+}
+
+uint64_t helper_cmulaf(uint64_t srcd, uint64_t srca, uint64_t srcb)
+{
+ uint32_t reala = (int16_t)srca;
+ uint32_t imaga = (int16_t)(srca >> 16);
+ uint32_t realb = (int16_t)srcb;
+ uint32_t imagb = (int16_t)(srcb >> 16);
+ uint32_t reald = (int16_t)srcd;
+ uint32_t imagd = (int16_t)(srcd >> 16);
+ int32_t realr = reala * realb - imaga * imagb;
+ int32_t imagr = reala * imagb + imaga * realb;
+
+ return deposit32((realr >> 15) + reald, 16, 16, (imagr >> 15) + imagd);
+}
+
+uint64_t helper_cmul2(uint64_t srca, uint64_t srcb, int shift, int round)
+{
+ uint32_t reala = (int16_t)srca;
+ uint32_t imaga = (int16_t)(srca >> 16);
+ uint32_t realb = (int16_t)srcb;
+ uint32_t imagb = (int16_t)(srcb >> 16);
+ int32_t realr = reala * realb - imaga * imagb + round;
+ int32_t imagr = reala * imagb + imaga * realb + round;
+
+ return deposit32(realr >> shift, 16, 16, imagr >> shift);
+}