Move target-* CPU file into a target/ folder

We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.

Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part]
Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part]
Acked-by: Michael Walle <michael@walle.cc> [lm32 part]
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part]
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part]
Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part]
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part]
Acked-by: Richard Henderson <rth@twiddle.net> [alpha part]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part]
Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part]
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [cris&microblaze part]
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part]
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 257 insertions, 0 deletions

diff --git a/target/sparc/helper.c b/target/sparc/helper.c
new file mode 100644
index 0000000000..359b0b15ed
--- /dev/null
+++ b/target/sparc/helper.c
@@ -0,0 +1,257 @@
+/*
+ *  Misc Sparc helpers
+ *
+ *  Copyright (c) 2003-2005 Fabrice Bellard
+ *
+ * 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 "qemu/host-utils.h"
+#include "exec/helper-proto.h"
+#include "sysemu/sysemu.h"
+
+void cpu_raise_exception_ra(CPUSPARCState *env, int tt, uintptr_t ra)
+{
+    CPUState *cs = CPU(sparc_env_get_cpu(env));
+
+    cs->exception_index = tt;
+    cpu_loop_exit_restore(cs, ra);
+}
+
+void helper_raise_exception(CPUSPARCState *env, int tt)
+{
+    CPUState *cs = CPU(sparc_env_get_cpu(env));
+
+    cs->exception_index = tt;
+    cpu_loop_exit(cs);
+}
+
+void helper_debug(CPUSPARCState *env)
+{
+    CPUState *cs = CPU(sparc_env_get_cpu(env));
+
+    cs->exception_index = EXCP_DEBUG;
+    cpu_loop_exit(cs);
+}
+
+#ifdef TARGET_SPARC64
+target_ulong helper_popc(target_ulong val)
+{
+    return ctpop64(val);
+}
+
+void helper_tick_set_count(void *opaque, uint64_t count)
+{
+#if !defined(CONFIG_USER_ONLY)
+    cpu_tick_set_count(opaque, count);
+#endif
+}
+
+uint64_t helper_tick_get_count(CPUSPARCState *env, void *opaque, int mem_idx)
+{
+#if !defined(CONFIG_USER_ONLY)
+    CPUTimer *timer = opaque;
+
+    if (timer->npt && mem_idx < MMU_KERNEL_IDX) {
+        cpu_raise_exception_ra(env, TT_PRIV_INSN, GETPC());
+    }
+
+    return cpu_tick_get_count(timer);
+#else
+    return 0;
+#endif
+}
+
+void helper_tick_set_limit(void *opaque, uint64_t limit)
+{
+#if !defined(CONFIG_USER_ONLY)
+    cpu_tick_set_limit(opaque, limit);
+#endif
+}
+#endif
+
+static target_ulong do_udiv(CPUSPARCState *env, target_ulong a,
+                            target_ulong b, int cc, uintptr_t ra)
+{
+    int overflow = 0;
+    uint64_t x0;
+    uint32_t x1;
+
+    x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
+    x1 = (b & 0xffffffff);
+
+    if (x1 == 0) {
+        cpu_raise_exception_ra(env, TT_DIV_ZERO, ra);
+    }
+
+    x0 = x0 / x1;
+    if (x0 > UINT32_MAX) {
+        x0 = UINT32_MAX;
+        overflow = 1;
+    }
+
+    if (cc) {
+        env->cc_dst = x0;
+        env->cc_src2 = overflow;
+        env->cc_op = CC_OP_DIV;
+    }
+    return x0;
+}
+
+target_ulong helper_udiv(CPUSPARCState *env, target_ulong a, target_ulong b)
+{
+    return do_udiv(env, a, b, 0, GETPC());
+}
+
+target_ulong helper_udiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b)
+{
+    return do_udiv(env, a, b, 1, GETPC());
+}
+
+static target_ulong do_sdiv(CPUSPARCState *env, target_ulong a,
+                            target_ulong b, int cc, uintptr_t ra)
+{
+    int overflow = 0;
+    int64_t x0;
+    int32_t x1;
+
+    x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
+    x1 = (b & 0xffffffff);
+
+    if (x1 == 0) {
+        cpu_raise_exception_ra(env, TT_DIV_ZERO, ra);
+    } else if (x1 == -1 && x0 == INT64_MIN) {
+        x0 = INT32_MAX;
+        overflow = 1;
+    } else {
+        x0 = x0 / x1;
+        if ((int32_t) x0 != x0) {
+            x0 = x0 < 0 ? INT32_MIN : INT32_MAX;
+            overflow = 1;
+        }
+    }
+
+    if (cc) {
+        env->cc_dst = x0;
+        env->cc_src2 = overflow;
+        env->cc_op = CC_OP_DIV;
+    }
+    return x0;
+}
+
+target_ulong helper_sdiv(CPUSPARCState *env, target_ulong a, target_ulong b)
+{
+    return do_sdiv(env, a, b, 0, GETPC());
+}
+
+target_ulong helper_sdiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b)
+{
+    return do_sdiv(env, a, b, 1, GETPC());
+}
+
+#ifdef TARGET_SPARC64
+int64_t helper_sdivx(CPUSPARCState *env, int64_t a, int64_t b)
+{
+    if (b == 0) {
+        /* Raise divide by zero trap.  */
+        cpu_raise_exception_ra(env, TT_DIV_ZERO, GETPC());
+    } else if (b == -1) {
+        /* Avoid overflow trap with i386 divide insn.  */
+        return -a;
+    } else {
+        return a / b;
+    }
+}
+
+uint64_t helper_udivx(CPUSPARCState *env, uint64_t a, uint64_t b)
+{
+    if (b == 0) {
+        /* Raise divide by zero trap.  */
+        cpu_raise_exception_ra(env, TT_DIV_ZERO, GETPC());
+    }
+    return a / b;
+}
+#endif
+
+target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1,
+                             target_ulong src2)
+{
+    target_ulong dst;
+
+    /* Tag overflow occurs if either input has bits 0 or 1 set.  */
+    if ((src1 | src2) & 3) {
+        goto tag_overflow;
+    }
+
+    dst = src1 + src2;
+
+    /* Tag overflow occurs if the addition overflows.  */
+    if (~(src1 ^ src2) & (src1 ^ dst) & (1u << 31)) {
+        goto tag_overflow;
+    }
+
+    /* Only modify the CC after any exceptions have been generated.  */
+    env->cc_op = CC_OP_TADDTV;
+    env->cc_src = src1;
+    env->cc_src2 = src2;
+    env->cc_dst = dst;
+    return dst;
+
+ tag_overflow:
+    cpu_raise_exception_ra(env, TT_TOVF, GETPC());
+}
+
+target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1,
+                             target_ulong src2)
+{
+    target_ulong dst;
+
+    /* Tag overflow occurs if either input has bits 0 or 1 set.  */
+    if ((src1 | src2) & 3) {
+        goto tag_overflow;
+    }
+
+    dst = src1 - src2;
+
+    /* Tag overflow occurs if the subtraction overflows.  */
+    if ((src1 ^ src2) & (src1 ^ dst) & (1u << 31)) {
+        goto tag_overflow;
+    }
+
+    /* Only modify the CC after any exceptions have been generated.  */
+    env->cc_op = CC_OP_TSUBTV;
+    env->cc_src = src1;
+    env->cc_src2 = src2;
+    env->cc_dst = dst;
+    return dst;
+
+ tag_overflow:
+    cpu_raise_exception_ra(env, TT_TOVF, GETPC());
+}
+
+#ifndef TARGET_SPARC64
+void helper_power_down(CPUSPARCState *env)
+{
+    CPUState *cs = CPU(sparc_env_get_cpu(env));
+
+    cs->halted = 1;
+    cs->exception_index = EXCP_HLT;
+    env->pc = env->npc;
+    env->npc = env->pc + 4;
+    cpu_loop_exit(cs);
+}
+#endif