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[Qemu-devel] [PATCH 05/18] TCG/x86: use stack for TCG temps
From: |
Blue Swirl |
Subject: |
[Qemu-devel] [PATCH 05/18] TCG/x86: use stack for TCG temps |
Date: |
Mon, 20 Jun 2011 00:05:16 +0300 |
Use stack instead of temp_buf array in CPUState for TCG
temps.
Signed-off-by: Blue Swirl <address@hidden>
---
tcg/i386/tcg-target.c | 22 ++++++++++++----------
1 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c
index 4c29ced..7529677 100644
--- a/tcg/i386/tcg-target.c
+++ b/tcg/i386/tcg-target.c
@@ -1918,20 +1918,24 @@ static void tcg_target_qemu_prologue(TCGContext *s)
/* TB prologue */
- /* 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. */
+ /* 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;
+ 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_out_addi(s, TCG_REG_CALL_STACK, -stack_addend);
+ 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]);
+ }
+
+ 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));
}
--
1.6.2.4
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