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* libguile/init.c (scm_i_init_guile): Call scm_init_jit (). * libguile/jit.c (enter_mcode, exit_mcode): New static members; code pointers for the JIT trampoline. (emit_exit): New helper. The Lightning tramp/frame mechanism that we use needs to exit via a jmp instead of a return. Adapt callers of jit_ret. (emit_entry_trampoline): Use the "frame" mechanism to enter the JIT. (compile1): Add missing "break" after case statements. Oops! (compile): Add prolog and "tramp" to compiled functions. (initialize_jit): New local routine to init the JIT on demand. (compute_mcode): New helper, to compile a function. (scm_sys_jit_compile): New function, exported to Scheme as %jit-compile. (scm_jit_compute_mcode): Return the existing mcode if the function is at the start. (scm_jit_enter_mcode): Call the enter_mcode trampoline. * libguile/jit.h (struct scm_jit_state): Declare, so we can make pointers to it. * libguile/threads.h (struct scm_thread): Add jit_state member. * libguile/threads.c (on_thread_exit): Free the jit state.
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#ifndef SCM_JIT_H
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#define SCM_JIT_H
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/* Copyright 2018
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Free Software Foundation, Inc.
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This file is part of Guile.
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Guile is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Guile is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with Guile. If not, see
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<https://www.gnu.org/licenses/>. */
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#include "libguile/scm.h"
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struct scm_jit_function_data;
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struct scm_jit_state;
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#ifdef BUILDING_LIBGUILE
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struct scm_jit_function_data
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{
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uint8_t *mcode;
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uint32_t counter;
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int32_t start;
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int32_t end;
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#if SCM_SIZEOF_UINTPTR_T == 4
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#elif SCM_SIZEOF_UINTPTR_T == 8
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uint32_t pad;
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#else
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#error unhandled sizeof(uintptr_t)
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#endif
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};
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enum scm_jit_counter_value
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{
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SCM_JIT_COUNTER_ENTRY_INCREMENT = 15,
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SCM_JIT_COUNTER_LOOP_INCREMENT = 1,
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SCM_JIT_COUNTER_THRESHOLD = 50
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};
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#endif
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SCM_INTERNAL const uint8_t *scm_jit_compute_mcode (scm_thread *thread,
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struct scm_jit_function_data *data);
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SCM_INTERNAL void scm_jit_enter_mcode (scm_thread *thread,
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const uint8_t *mcode);
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SCM_INTERNAL void scm_jit_state_free (struct scm_jit_state *j);
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SCM_INTERNAL void scm_init_jit (void);
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#endif /* SCM_JIT_H */
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