TCG code generator

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3943 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 324 insertions, 0 deletions

diff --git a/tcg/tcg.h b/tcg/tcg.h
new file mode 100644
index 0000000000..e57e5deb01
--- /dev/null
+++ b/tcg/tcg.h
@@ -0,0 +1,324 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "tcg-target.h"
+
+#if TCG_TARGET_REG_BITS == 32
+typedef int32_t tcg_target_long;
+typedef uint32_t tcg_target_ulong;
+#define TCG_PRIlx PRIx32
+#define TCG_PRIld PRId32
+#elif TCG_TARGET_REG_BITS == 64
+typedef int64_t tcg_target_long;
+typedef uint64_t tcg_target_ulong;
+#define TCG_PRIlx PRIx64
+#define TCG_PRIld PRId64
+#else
+#error unsupported
+#endif
+
+#if TCG_TARGET_NB_REGS <= 32
+typedef uint32_t TCGRegSet;
+#elif TCG_TARGET_NB_REGS <= 64
+typedef uint64_t TCGRegSet;
+#else
+#error unsupported
+#endif
+
+enum {
+#define DEF(s, n, copy_size) INDEX_op_ ## s,
+#include "tcg-opc.h"
+#undef DEF
+    NB_OPS,
+};
+
+#define tcg_regset_clear(d) (d) = 0
+#define tcg_regset_set(d, s) (d) = (s)
+#define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
+#define tcg_regset_set_reg(d, r) (d) |= 1 << (r)
+#define tcg_regset_reset_reg(d, r) (d) &= ~(1 << (r))
+#define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
+#define tcg_regset_or(d, a, b) (d) = (a) | (b)
+#define tcg_regset_and(d, a, b) (d) = (a) & (b)
+#define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
+#define tcg_regset_not(d, a) (d) = ~(a)
+
+typedef struct TCGRelocation {
+    struct TCGRelocation *next;
+    int type;
+    uint8_t *ptr;
+    tcg_target_long addend;
+} TCGRelocation; 
+
+typedef struct TCGLabel {
+    int has_value;
+    union {
+        tcg_target_ulong value;
+        TCGRelocation *first_reloc;
+    } u;
+} TCGLabel;
+
+typedef struct TCGPool {
+    struct TCGPool *next;
+    int size;
+    uint8_t data[0];
+} TCGPool;
+
+#define TCG_POOL_CHUNK_SIZE 32768
+
+#define TCG_MAX_LABELS 512
+
+#define TCG_MAX_TEMPS 256
+
+typedef int TCGType;
+
+#define TCG_TYPE_I32 0
+#define TCG_TYPE_I64 1
+
+#if TCG_TARGET_REG_BITS == 32
+#define TCG_TYPE_PTR TCG_TYPE_I32
+#else
+#define TCG_TYPE_PTR TCG_TYPE_I64
+#endif
+
+typedef tcg_target_ulong TCGArg;
+
+/* call flags */
+#define TCG_CALL_TYPE_MASK      0x000f
+#define TCG_CALL_TYPE_STD       0x0000 /* standard C call */
+#define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
+#define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
+#define TCG_CALL_TYPE_REGPARM   0x0003 /* i386 style regparm call (3 regs) */
+
+typedef enum {
+    TCG_COND_EQ,
+    TCG_COND_NE,
+    TCG_COND_LT,
+    TCG_COND_GE,
+    TCG_COND_LE,
+    TCG_COND_GT,
+    /* unsigned */
+    TCG_COND_LTU,
+    TCG_COND_GEU,
+    TCG_COND_LEU,
+    TCG_COND_GTU,
+} TCGCond;
+
+#define TEMP_VAL_DEAD  0
+#define TEMP_VAL_REG   1
+#define TEMP_VAL_MEM   2
+#define TEMP_VAL_CONST 3
+
+/* XXX: optimize memory layout */
+typedef struct TCGTemp {
+    TCGType base_type;
+    TCGType type;
+    int val_type;
+    int reg;
+    tcg_target_long val;
+    int mem_reg;
+    tcg_target_long mem_offset;
+    unsigned int fixed_reg:1;
+    unsigned int mem_coherent:1;
+    unsigned int mem_allocated:1;
+    const char *name;
+} TCGTemp;
+
+typedef struct TCGHelperInfo {
+    void *func;
+    const char *name;
+} TCGHelperInfo;
+
+typedef struct TCGContext TCGContext;
+
+typedef void TCGMacroFunc(TCGContext *s, int macro_id, const int *dead_args);
+
+struct TCGContext {
+    uint8_t *pool_cur, *pool_end;
+    TCGPool *pool_first, *pool_current;
+    TCGLabel *labels;
+    int nb_labels;
+    TCGTemp *temps; /* globals first, temps after */
+    int nb_globals;
+    int nb_temps;
+    /* constant indexes (end of temp array) */
+    int const_start;
+    int const_end;
+
+    /* goto_tb support */
+    uint8_t *code_buf;
+    unsigned long *tb_next;
+    uint16_t *tb_next_offset;
+    uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
+
+    uint16_t *op_dead_iargs; /* for each operation, each bit tells if the
+                                corresponding input argument is dead */
+    /* tells in which temporary a given register is. It does not take
+       into account fixed registers */
+    int reg_to_temp[TCG_TARGET_NB_REGS];
+    TCGRegSet reserved_regs;
+    tcg_target_long current_frame_offset;
+    tcg_target_long frame_start;
+    tcg_target_long frame_end;
+    int frame_reg;
+
+    uint8_t *code_ptr;
+    TCGTemp static_temps[TCG_MAX_TEMPS];
+
+    TCGMacroFunc *macro_func;
+    TCGHelperInfo *helpers;
+    int nb_helpers;
+    int allocated_helpers;
+};
+
+extern TCGContext tcg_ctx;
+extern uint16_t *gen_opc_ptr;
+extern TCGArg *gen_opparam_ptr;
+extern uint16_t gen_opc_buf[];
+extern TCGArg gen_opparam_buf[];
+
+/* pool based memory allocation */
+
+void *tcg_malloc_internal(TCGContext *s, int size);
+void tcg_pool_reset(TCGContext *s);
+void tcg_pool_delete(TCGContext *s);
+
+static inline void *tcg_malloc(int size)
+{
+    TCGContext *s = &tcg_ctx;
+    uint8_t *ptr, *ptr_end;
+    size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
+    ptr = s->pool_cur;
+    ptr_end = ptr + size;
+    if (unlikely(ptr_end > s->pool_end)) {
+        return tcg_malloc_internal(&tcg_ctx, size);
+    } else {
+        s->pool_cur = ptr_end;
+        return ptr;
+    }
+}
+
+void tcg_context_init(TCGContext *s);
+void tcg_func_start(TCGContext *s);
+
+int dyngen_code(TCGContext *s, uint8_t *gen_code_buf);
+int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf,
+                          const uint8_t *searched_pc);
+
+void tcg_set_frame(TCGContext *s, int reg,
+                   tcg_target_long start, tcg_target_long size);
+void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func);
+int tcg_global_reg_new(TCGType type, int reg, const char *name);
+int tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
+                       const char *name);
+int tcg_temp_new(TCGType type);
+char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGArg arg);
+
+#define TCG_CT_ALIAS  0x80
+#define TCG_CT_IALIAS 0x40
+#define TCG_CT_REG    0x01
+#define TCG_CT_CONST  0x02 /* any constant of register size */
+
+typedef struct TCGArgConstraint {
+    uint32_t ct;
+    union {
+        TCGRegSet regs;
+    } u;
+} TCGArgConstraint;
+
+#define TCG_MAX_OP_ARGS 16
+
+#define TCG_OPF_BB_END     0x01 /* instruction defines the end of a basic
+                                   block */
+#define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers */
+
+typedef struct TCGOpDef {
+    const char *name;
+    uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
+    uint8_t flags;
+    uint16_t copy_size;
+    TCGArgConstraint *args_ct;
+    int *sorted_args;
+} TCGOpDef;
+        
+typedef struct TCGTargetOpDef {
+    int op;
+    const char *args_ct_str[TCG_MAX_OP_ARGS];
+} TCGTargetOpDef;
+
+extern TCGOpDef tcg_op_defs[];
+
+void tcg_target_init(TCGContext *s);
+
+#define tcg_abort() \
+do {\
+    fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
+    abort();\
+} while (0)
+
+void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
+
+void tcg_gen_call(TCGContext *s, TCGArg func, unsigned int flags,
+                  unsigned int nb_rets, const TCGArg *rets,
+                  unsigned int nb_params, const TCGArg *args1);
+void tcg_gen_shifti_i64(TCGArg ret, TCGArg arg1, 
+                        int c, int right, int arith);
+
+/* only used for debugging purposes */
+void tcg_register_helper(void *func, const char *name);
+#define TCG_HELPER(func) tcg_register_helper(func, #func)
+const char *tcg_helper_get_name(TCGContext *s, void *func);
+void tcg_dump_ops(TCGContext *s, FILE *outfile);
+
+void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
+int tcg_const_i32(int32_t val);
+int tcg_const_i64(int64_t val);
+
+#if TCG_TARGET_REG_BITS == 32
+#define tcg_const_ptr tcg_const_i32
+#define tcg_add_ptr tcg_add_i32
+#define tcg_sub_ptr tcg_sub_i32
+#else
+#define tcg_const_ptr tcg_const_i64
+#define tcg_add_ptr tcg_add_i64
+#define tcg_sub_ptr tcg_sub_i64
+#endif
+
+void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type, 
+                   int label_index, long addend);
+void tcg_reg_alloc_start(TCGContext *s);
+void tcg_reg_alloc_bb_end(TCGContext *s);
+void tcg_liveness_analysis(TCGContext *s);
+const TCGArg *tcg_gen_code_op(TCGContext *s, int opc, const TCGArg *args1,
+                              unsigned int dead_iargs);
+
+const TCGArg *dyngen_op(TCGContext *s, int opc, const TCGArg *opparam_ptr);
+
+/* tcg-runtime.c */
+int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2);
+int64_t tcg_helper_shr_i64(int64_t arg1, int64_t arg2);
+int64_t tcg_helper_sar_i64(int64_t arg1, int64_t arg2);
+int64_t tcg_helper_div_i64(int64_t arg1, int64_t arg2);
+int64_t tcg_helper_rem_i64(int64_t arg1, int64_t arg2);
+uint64_t tcg_helper_divu_i64(uint64_t arg1, uint64_t arg2);
+uint64_t tcg_helper_remu_i64(uint64_t arg1, uint64_t arg2);