target-hppa: Add framework and enable compilation

This is just about the minimum required to enable compilation
without actually executing any instructions.  This contains the
HPPACPU structure and the required callbacks, the gdbstub, the
basic translation loop, and a translate_one function that always
results in an illegal instruction.

Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 65 insertions, 0 deletions

diff --git a/target/hppa/op_helper.c b/target/hppa/op_helper.c
new file mode 100644
index 0000000000..4dd0119424
--- /dev/null
+++ b/target/hppa/op_helper.c
@@ -0,0 +1,65 @@
+/*
+ * Helpers for HPPA instructions.
+ *
+ * Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
+ *
+ * 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"
+
+void QEMU_NORETURN HELPER(excp)(CPUHPPAState *env, int excp)
+{
+    HPPACPU *cpu = hppa_env_get_cpu(env);
+    CPUState *cs = CPU(cpu);
+
+    cs->exception_index = excp;
+    cpu_loop_exit(cs);
+}
+
+void HELPER(loaded_fr0)(CPUHPPAState *env)
+{
+    uint32_t shadow = env->fr[0] >> 32;
+    int rm, d;
+
+    env->fr0_shadow = shadow;
+
+    switch (extract32(shadow, 9, 2)) {
+    default:
+        rm = float_round_nearest_even;
+        break;
+    case 1:
+        rm = float_round_to_zero;
+        break;
+    case 2:
+        rm = float_round_up;
+        break;
+    case 3:
+        rm = float_round_down;
+        break;
+    }
+    set_float_rounding_mode(rm, &env->fp_status);
+
+    d = extract32(shadow, 5, 1);
+    set_flush_to_zero(d, &env->fp_status);
+    set_flush_inputs_to_zero(d, &env->fp_status);
+}
+
+void cpu_hppa_loaded_fr0(CPUHPPAState *env)
+{
+    helper_loaded_fr0(env);
+}