1c2adb958f
This is identical for each target. So, move the initialization to
common code. Move the variable itself out of tcg_ctx and name it
cpu_env to minimize changes within targets.
This also means we can remove tcg_global_reg_new_{ptr,i32,i64},
since there are no longer global-register temps created by targets.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
#ifndef GEN_ICOUNT_H
|
|
#define GEN_ICOUNT_H
|
|
|
|
#include "qemu/timer.h"
|
|
|
|
/* Helpers for instruction counting code generation. */
|
|
|
|
static int icount_start_insn_idx;
|
|
|
|
static inline void gen_tb_start(TranslationBlock *tb)
|
|
{
|
|
TCGv_i32 count, imm;
|
|
|
|
tcg_ctx->exitreq_label = gen_new_label();
|
|
if (tb_cflags(tb) & CF_USE_ICOUNT) {
|
|
count = tcg_temp_local_new_i32();
|
|
} else {
|
|
count = tcg_temp_new_i32();
|
|
}
|
|
|
|
tcg_gen_ld_i32(count, cpu_env,
|
|
-ENV_OFFSET + offsetof(CPUState, icount_decr.u32));
|
|
|
|
if (tb_cflags(tb) & CF_USE_ICOUNT) {
|
|
imm = tcg_temp_new_i32();
|
|
/* We emit a movi with a dummy immediate argument. Keep the insn index
|
|
* of the movi so that we later (when we know the actual insn count)
|
|
* can update the immediate argument with the actual insn count. */
|
|
icount_start_insn_idx = tcg_op_buf_count();
|
|
tcg_gen_movi_i32(imm, 0xdeadbeef);
|
|
|
|
tcg_gen_sub_i32(count, count, imm);
|
|
tcg_temp_free_i32(imm);
|
|
}
|
|
|
|
tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, tcg_ctx->exitreq_label);
|
|
|
|
if (tb_cflags(tb) & CF_USE_ICOUNT) {
|
|
tcg_gen_st16_i32(count, cpu_env,
|
|
-ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
|
|
}
|
|
|
|
tcg_temp_free_i32(count);
|
|
}
|
|
|
|
static inline void gen_tb_end(TranslationBlock *tb, int num_insns)
|
|
{
|
|
if (tb_cflags(tb) & CF_USE_ICOUNT) {
|
|
/* Update the num_insn immediate parameter now that we know
|
|
* the actual insn count. */
|
|
tcg_set_insn_param(icount_start_insn_idx, 1, num_insns);
|
|
}
|
|
|
|
gen_set_label(tcg_ctx->exitreq_label);
|
|
tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_REQUESTED);
|
|
|
|
/* Terminate the linked list. */
|
|
tcg_ctx->gen_op_buf[tcg_ctx->gen_op_buf[0].prev].next = 0;
|
|
}
|
|
|
|
static inline void gen_io_start(void)
|
|
{
|
|
TCGv_i32 tmp = tcg_const_i32(1);
|
|
tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
|
|
tcg_temp_free_i32(tmp);
|
|
}
|
|
|
|
static inline void gen_io_end(void)
|
|
{
|
|
TCGv_i32 tmp = tcg_const_i32(0);
|
|
tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
|
|
tcg_temp_free_i32(tmp);
|
|
}
|
|
|
|
#endif
|