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TCG/x86: use stack for TCG temps

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Use stack instead of temp_buf array in CPUState for TCG
temps.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2011-05-14 13:14:45 +00:00
parent e83c80f718
commit ac0275dcfe
1 changed files with 13 additions and 11 deletions

24
tcg/i386/tcg-target.c

@ -1918,20 +1918,24 @@ static void tcg_target_qemu_prologue(TCGContext *s)
/* TB prologue */
/* Reserve some stack space, also for TCG temps. */
push_size = 1 + ARRAY_SIZE(tcg_target_callee_save_regs);
push_size *= TCG_TARGET_REG_BITS / 8;
frame_size = push_size + TCG_STATIC_CALL_ARGS_SIZE +
CPU_TEMP_BUF_NLONGS * sizeof(long);
frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) &
~(TCG_TARGET_STACK_ALIGN - 1);
stack_addend = frame_size - push_size;
tcg_set_frame(s, TCG_REG_CALL_STACK, TCG_STATIC_CALL_ARGS_SIZE,
CPU_TEMP_BUF_NLONGS * sizeof(long));
/* Save all callee saved registers. */
for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
tcg_out_push(s, tcg_target_callee_save_regs[i]);
}
/* Reserve some stack space. */
push_size = 1 + ARRAY_SIZE(tcg_target_callee_save_regs);
push_size *= TCG_TARGET_REG_BITS / 8;
frame_size = push_size + TCG_STATIC_CALL_ARGS_SIZE;
frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) &
~(TCG_TARGET_STACK_ALIGN - 1);
stack_addend = frame_size - push_size;
tcg_out_addi(s, TCG_REG_CALL_STACK, -stack_addend);
tcg_out_addi(s, TCG_REG_ESP, -stack_addend);
tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
@ -1981,6 +1985,4 @@ static void tcg_target_init(TCGContext *s)
tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
tcg_add_target_add_op_defs(x86_op_defs);
tcg_set_frame(s, TCG_AREG0, offsetof(CPUState, temp_buf),
CPU_TEMP_BUF_NLONGS * sizeof(long));
}