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-rw-r--r--libguile/jit.h70
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diff --git a/libguile/jit.h b/libguile/jit.h
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+#ifndef SCM_JIT_H
+#define SCM_JIT_H
+
+/* Copyright 2018-2019
+ Free Software Foundation, Inc.
+
+ This file is part of Guile.
+
+ Guile 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 3 of the License, or
+ (at your option) any later version.
+
+ Guile 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 Guile. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+
+
+#include "libguile/scm.h"
+
+
+
+struct scm_jit_function_data;
+struct scm_jit_state;
+
+#ifdef BUILDING_LIBGUILE
+struct scm_jit_function_data
+{
+ uint8_t *mcode;
+ uint32_t counter;
+ int32_t start;
+ int32_t end;
+#if SCM_SIZEOF_UINTPTR_T == 4
+#elif SCM_SIZEOF_UINTPTR_T == 8
+ uint32_t pad;
+#else
+#error unhandled sizeof(uintptr_t)
+#endif
+};
+
+/* These values should be even, so that a function's counter is never
+ 0xffffffff, so that setting the JIT threshold to 0xffffffff always
+ disables compilation. */
+enum scm_jit_counter_value
+{
+ SCM_JIT_COUNTER_ENTRY_INCREMENT = 30,
+ SCM_JIT_COUNTER_LOOP_INCREMENT = 2,
+};
+#endif
+
+SCM_INTERNAL uint32_t scm_jit_counter_threshold;
+
+SCM_INTERNAL const uint8_t *scm_jit_compute_mcode (scm_thread *thread,
+ struct scm_jit_function_data *data);
+SCM_INTERNAL void scm_jit_enter_mcode (scm_thread *thread,
+ const uint8_t *mcode);
+SCM_INTERNAL void scm_jit_state_free (struct scm_jit_state *j);
+
+SCM_INTERNAL void *scm_jit_return_to_interpreter_trampoline;
+SCM_INTERNAL void scm_jit_clear_mcode_return_addresses (scm_thread *thread);
+
+SCM_INTERNAL void scm_init_jit (void);
+
+#endif /* SCM_JIT_H */