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tcg: Put opcodes in a linked list

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The previous setup required ops and args to be completely sequential,
and was error prone when it came to both iteration and optimization.

Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-09-19 13:49:15 -07:00
parent fe700adb3d
commit c45cb8bb89
5 changed files with 438 additions and 508 deletions
Download patch file Download diff file Expand all files Collapse all files

22
include/exec/gen-icount.h
View file

@ -11,8 +11,8 @@ static int exitreq_label;
static inline void gen_tb_start(TranslationBlock *tb)
{
TCGv_i32 count;
TCGv_i32 flag;
TCGv_i32 count, flag, imm;
int i;
exitreq_label = gen_new_label();
flag = tcg_temp_new_i32();
@ -21,16 +21,25 @@ static inline void gen_tb_start(TranslationBlock *tb)
tcg_gen_brcondi_i32(TCG_COND_NE, flag, 0, exitreq_label);
tcg_temp_free_i32(flag);
if (!(tb->cflags & CF_USE_ICOUNT))
if (!(tb->cflags & CF_USE_ICOUNT)) {
return;
}
icount_label = gen_new_label();
count = tcg_temp_local_new_i32();
tcg_gen_ld_i32(count, cpu_env,
-ENV_OFFSET + offsetof(CPUState, icount_decr.u32));
imm = tcg_temp_new_i32();
tcg_gen_movi_i32(imm, 0xdeadbeef);
/* This is a horrid hack to allow fixing up the value later. */
icount_arg = tcg_ctx.gen_opparam_ptr + 1;
tcg_gen_subi_i32(count, count, 0xdeadbeef);
i = tcg_ctx.gen_last_op_idx;
i = tcg_ctx.gen_op_buf[i].args;
icount_arg = &tcg_ctx.gen_opparam_buf[i + 1];
tcg_gen_sub_i32(count, count, imm);
tcg_temp_free_i32(imm);
tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label);
tcg_gen_st16_i32(count, cpu_env,
@ -49,7 +58,8 @@ static void gen_tb_end(TranslationBlock *tb, int num_insns)
tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED);
}
*tcg_ctx.gen_opc_ptr = INDEX_op_end;
/* Terminate the linked list. */
tcg_ctx.gen_op_buf[tcg_ctx.gen_last_op_idx].next = -1;
}
static inline void gen_io_start(void)