mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-05-01 15:22:50 -06:00
Now there is a just-in-time compiler which generates native code for proof search. This is already used by the exhaustive generator. The time to generate 10000 abstract trees with ParseEng went down from 4.43 sec to 0.29 sec.
This commit is contained in:
kr.angelov
290
src/runtime/c/pgf/jit.c
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290
src/runtime/c/pgf/jit.c
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#include <gu/seq.h>
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#include <gu/file.h>
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#include <pgf/data.h>
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#include <pgf/jit.h>
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#include <pgf/reasoner.h>
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#include "sys/mman.h"
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#include "lightning.h"
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//#define PGF_JIT_DEBUG
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struct PgfJitState {
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GuPool* tmp_pool;
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GuPool* pool;
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jit_state jit;
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jit_insn *buf;
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GuBuf* patches;
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};
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#define _jit (state->jit)
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typedef struct {
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PgfCId cid;
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jit_insn *ref;
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} PgfCallPatch;
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// Between two calls to pgf_jit_make_space we are not allowed
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// to emit more that JIT_CODE_WINDOW bytes. This is not quite
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// safe but this is how GNU lightning is designed.
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#define JIT_CODE_WINDOW 128
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typedef struct {
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GuFinalizer fin;
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void *page;
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} PgfPageFinalizer;
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static void
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pgf_jit_finalize_page(GuFinalizer* self)
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{
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PgfPageFinalizer* fin = gu_container(self, PgfPageFinalizer, fin);
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free(fin->page);
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}
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static size_t total_size = 0;
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static void
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pgf_jit_alloc_page(PgfJitState* state)
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{
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void *page;
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size_t page_size = sysconf(_SC_PAGESIZE);
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total_size += page_size;
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if (posix_memalign(&page, page_size, page_size) != 0) {
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gu_fatal("Memory allocation failed");
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}
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if (mprotect(page, page_size,
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PROT_READ | PROT_WRITE | PROT_EXEC) != 0) {
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gu_fatal("mprotect failed");
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}
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PgfPageFinalizer* fin = gu_new(PgfPageFinalizer, state->pool);
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fin->fin.fn = pgf_jit_finalize_page;
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fin->page = page;
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gu_pool_finally(state->pool, &fin->fin);
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state->buf = page;
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jit_set_ip(state->buf);
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}
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PgfJitState*
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pgf_jit_init(GuPool* tmp_pool, GuPool* pool)
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{
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PgfJitState* state = gu_new(PgfJitState, tmp_pool);
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state->tmp_pool = tmp_pool;
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state->pool = pool;
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state->buf = NULL;
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state->patches = gu_new_buf(PgfCallPatch, tmp_pool);
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pgf_jit_alloc_page(state);
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return state;
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}
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static void
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pgf_jit_make_space(PgfJitState* state)
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{
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size_t page_size = sysconf(_SC_PAGESIZE);
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if (jit_get_ip().ptr + JIT_CODE_WINDOW > ((char*) state->buf) + page_size) {
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jit_flush_code(state->buf, jit_get_ip().ptr);
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pgf_jit_alloc_page(state);
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}
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}
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void
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pgf_jit_predicate(PgfJitState* state,
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PgfCIdMap* abscats, PgfAbsCat* abscat)
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{
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#ifdef PGF_JIT_DEBUG
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GuPool* tmp_pool = gu_new_pool();
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GuOut* out = gu_file_out(stderr, tmp_pool);
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GuWriter* wtr = gu_new_utf8_writer(out, tmp_pool);
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GuExn* err = gu_exn(NULL, type, tmp_pool);
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gu_string_write(abscat->name, wtr, err);
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gu_puts(":\n", wtr, err);
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int label = 0;
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#endif
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size_t n_funs = gu_buf_length(abscat->functions);
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pgf_jit_make_space(state);
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abscat->predicate = (PgfPredicate) jit_get_ip().ptr;
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jit_prolog(2);
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if (n_funs > 0) {
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PgfAbsFun* absfun =
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gu_buf_get(abscat->functions, PgfAbsFun*, 0);
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#ifdef PGF_JIT_DEBUG
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gu_puts(" TRY_FIRST ", wtr, err);
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gu_string_write(absfun->name, wtr, err);
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gu_puts("\n", wtr, err);
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#endif
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int rs_arg = jit_arg_p();
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int parent_arg = jit_arg_p();
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jit_getarg_p(JIT_V1, rs_arg);
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jit_getarg_p(JIT_V2, parent_arg);
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// compile TRY_FIRST
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jit_prepare(3);
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jit_movi_p(JIT_V0,absfun);
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jit_pusharg_p(JIT_V0);
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jit_pusharg_p(JIT_V2);
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jit_pusharg_p(JIT_V1);
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jit_finish(pgf_try_first);
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}
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#ifdef PGF_JIT_DEBUG
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gu_puts(" RET\n", wtr, err);
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#endif
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// compile RET
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jit_ret();
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#ifdef PGF_JIT_DEBUG
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if (n_funs > 0) {
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PgfAbsFun* absfun =
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gu_buf_get(abscat->functions, PgfAbsFun*, 0);
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gu_string_write(absfun->name, wtr, err);
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gu_puts(":\n", wtr, err);
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}
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#endif
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for (size_t i = 0; i < n_funs; i++) {
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PgfAbsFun* absfun =
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gu_buf_get(abscat->functions, PgfAbsFun*, i);
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pgf_jit_make_space(state);
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absfun->predicate = (PgfPredicate) jit_get_ip().ptr;
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jit_prolog(2);
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int rs_arg = jit_arg_p();
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int st_arg = jit_arg_p();
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jit_getarg_p(JIT_V1, rs_arg);
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jit_getarg_p(JIT_V2, st_arg);
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if (i+1 < n_funs) {
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PgfAbsFun* absfun =
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gu_buf_get(abscat->functions, PgfAbsFun*, i+1);
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#ifdef PGF_JIT_DEBUG
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gu_puts(" TRY_ELSE ", wtr, err);
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gu_string_write(absfun->name, wtr, err);
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gu_puts("\n", wtr, err);
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#endif
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// compile TRY_ELSE
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jit_prepare(3);
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jit_movi_p(JIT_V0, absfun);
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jit_pusharg_p(JIT_V0);
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jit_pusharg_p(JIT_V2);
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jit_pusharg_p(JIT_V1);
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jit_finish(pgf_try_else);
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}
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size_t n_hypos = gu_seq_length(absfun->type->hypos);
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for (size_t i = 0; i < n_hypos; i++) {
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PgfHypo* hypo = gu_seq_index(absfun->type->hypos, PgfHypo, i);
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jit_insn *ref;
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// call the predicate for the category in hypo->type->cid
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PgfAbsCat* arg =
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gu_map_get(abscats, &hypo->type->cid, PgfAbsCat*);
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#ifdef PGF_JIT_DEBUG
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gu_puts(" CALL ", wtr, err);
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gu_string_write(hypo->type->cid, wtr, err);
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gu_printf(wtr, err, " L%d\n", label);
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#endif
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// compile CALL
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ref = jit_movi_p(JIT_V0, jit_forward());
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jit_str_p(JIT_V2, JIT_V0);
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jit_prepare(2);
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jit_pusharg_p(JIT_V2);
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jit_pusharg_p(JIT_V1);
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if (arg != NULL) {
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jit_finish(arg->predicate);
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} else {
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PgfCallPatch patch;
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patch.cid = hypo->type->cid;
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patch.ref = jit_finish(jit_forward());
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gu_buf_push(state->patches, PgfCallPatch, patch);
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}
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#ifdef PGF_JIT_DEBUG
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gu_puts(" RET\n", wtr, err);
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gu_printf(wtr, err, "L%d:\n", label++);
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#endif
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// compile RET
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jit_ret();
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pgf_jit_make_space(state);
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jit_patch_movi(ref,jit_get_label());
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jit_prolog(2);
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rs_arg = jit_arg_p();
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st_arg = jit_arg_p();
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jit_getarg_p(JIT_V1, rs_arg);
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jit_getarg_p(JIT_V2, st_arg);
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}
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#ifdef PGF_JIT_DEBUG
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gu_puts(" COMPLETE\n", wtr, err);
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#endif
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// compile COMPLETE
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jit_prepare(2);
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jit_pusharg_p(JIT_V2);
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jit_pusharg_p(JIT_V1);
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jit_finish(pgf_complete);
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#ifdef PGF_JIT_DEBUG
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gu_puts(" RET\n", wtr, err);
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#endif
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// compile RET
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jit_ret();
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#ifdef PGF_JIT_DEBUG
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if (i+1 < n_funs) {
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PgfAbsFun* absfun =
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gu_buf_get(abscat->functions, PgfAbsFun*, i+1);
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gu_string_write(absfun->name, wtr, err);
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gu_puts(":\n", wtr, err);
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}
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#endif
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}
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#ifdef PGF_JIT_DEBUG
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gu_pool_free(tmp_pool);
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#endif
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}
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void
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pgf_jit_done(PgfJitState* state, PgfAbstr* abstr)
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{
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size_t n_patches = gu_buf_length(state->patches);
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for (size_t i = 0; i < n_patches; i++) {
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PgfCallPatch* patch =
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gu_buf_index(state->patches, PgfCallPatch, i);
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PgfAbsCat* arg =
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gu_map_get(abstr->cats, &patch->cid, PgfAbsCat*);
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gu_assert(arg != NULL);
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jit_patch_at(patch->ref,(jit_insn*) arg->predicate);
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}
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jit_flush_code(state->buf, jit_get_ip().ptr);
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}
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