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tcg/aarch64: Implement goto_ptr

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Measurements:

                      SPECint06 (test set), x86_64-linux-user. Host: APM 64-bit ARMv8 (Atlas/A57) @ 2.4 GHz

 1.45x +-+-------------------------------------------------------------------------------------------------------------+-+
       |                                      *****                                                                      |
       |      +++                             *   *                                                    +goto-ptr         |
  1.4x +-+...*****............................*...*....................................................................+-+
       |     *+++*                            *   *                            +++                                       |
 1.35x +-+...*...*............................*...*...........................*****....................................+-+
       |     *   *                            *   *                           *+++*                                      |
       |     *   *                            *   *                           *   *                                      |
  1.3x +-+...*...*............................*...*...........................*...*....................................+-+
       |     *   *                            *   *                           *   *                                      |
       |     *   *                            *   *                           *   *                    *****             |
 1.25x +-+...*...*...........*****............*...*...........................*...*............*****...*...*...........+-+
       |     *   *           *   *            *   *                           *   *            *+++*   *   *             |
  1.2x +-+...*...*...........*...*............*...*...........................*...*............*...*...*...*...........+-+
       |     *   *           *   *            *   *                           *   *            *   *   *   *             |
       |     *   *           *   *            *   *                           *   *            *   *   *   *   *****     |
 1.15x +-+...*...*...........*...*............*...*...........................*...*............*...*...*...*...*...*...+-+
       |     *   *           *   *            *   *                           *   *    +++     *   *   *   *   *   *     |
       |     *   *           *   *            *   *                           *   *   *****    *   *   *   *   *   *     |
  1.1x +-+...*...*...........*...*....*****...*...*...*****...................*...*...*...*....*...*...*...*...*...*...+-+
       |     *   *           *   *    *   *   *   *   *   *                   *   *   *   *    *   *   *   *   *   *     |
 1.05x +-+...*...*...........*...*....*...*...*...*...*...*...................*...*...*...*....*...*...*...*...*...*...+-+
       |     *   *   *****   *   *    *   *   *   *   *   *                   *   *   *   *    *   *   *   *   *   *     |
       |     *   *   *   *   *   *    *   *   *   *   *   *   *****   *****   *   *   *   *    *   *   *   *   *   *     |
    1x +-+---*****---*****---*****----*****---*****---*****---*****---*****---*****---*****----*****---*****---*****---+-+
          astar   bzip2     gcc    gobmk h264ref   hmmlibquantum     mcf omnetpperlbench    sjenxalancbmk   hmean
  png: http://imgur.com/en9HE8L

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-04-26 08:42:58 -07:00
parent 0c240785a8
commit b19f0c2e7d
2 changed files with 21 additions and 3 deletions
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2
tcg/aarch64/tcg-target.h
View File

@ -77,7 +77,7 @@ typedef enum {
#define TCG_TARGET_HAS_mulsh_i32 0
#define TCG_TARGET_HAS_extrl_i64_i32 0
#define TCG_TARGET_HAS_extrh_i64_i32 0
#define TCG_TARGET_HAS_goto_ptr 0
#define TCG_TARGET_HAS_goto_ptr 1
#define TCG_TARGET_HAS_div_i64 1
#define TCG_TARGET_HAS_rem_i64 1

22
tcg/aarch64/tcg-target.inc.c
View File

@ -1357,8 +1357,13 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
switch (opc) {
case INDEX_op_exit_tb:
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_X0, a0);
tcg_out_goto(s, tb_ret_addr);
/* Reuse the zeroing that exists for goto_ptr. */
if (a0 == 0) {
tcg_out_goto(s, s->code_gen_epilogue);
} else {
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_X0, a0);
tcg_out_goto(s, tb_ret_addr);
}
break;
case INDEX_op_goto_tb:
@ -1374,6 +1379,10 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
s->tb_jmp_reset_offset[a0] = tcg_current_code_size(s);
break;
case INDEX_op_goto_ptr:
tcg_out_insn(s, 3207, BR, a0);
break;
case INDEX_op_br:
tcg_out_goto_label(s, arg_label(a0));
break;
@ -1735,6 +1744,7 @@ static const TCGTargetOpDef aarch64_op_defs[] = {
{ INDEX_op_exit_tb, { } },
{ INDEX_op_goto_tb, { } },
{ INDEX_op_br, { } },
{ INDEX_op_goto_ptr, { "r" } },
{ INDEX_op_ld8u_i32, { "r", "r" } },
{ INDEX_op_ld8s_i32, { "r", "r" } },
@ -1942,6 +1952,14 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
tcg_out_insn(s, 3207, BR, tcg_target_call_iarg_regs[1]);
/*
* Return path for goto_ptr. Set return value to 0, a-la exit_tb,
* and fall through to the rest of the epilogue.
*/
s->code_gen_epilogue = s->code_ptr;
tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_X0, 0);
/* TB epilogue */
tb_ret_addr = s->code_ptr;
/* Remove TCG locals stack space. */