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[Qemu-devel] [PATCH v2 02/26] tcg: add tcg_reg_sync()
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH v2 02/26] tcg: add tcg_reg_sync() |
Date: |
Tue, 9 Oct 2012 21:56:00 +0200 |
Add a new function tcg_reg_sync() to synchronize the canonical location
of a temp with the value in the associated register, but without freeing
it. Rewrite tcg_reg_free() to first call tcg_reg_sync() and then to free
the register.
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
tcg/tcg.c | 29 ++++++++++++++++++++---------
1 file changed, 20 insertions(+), 9 deletions(-)
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 51a82dc..2e37203 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1470,22 +1470,33 @@ static void temp_allocate_frame(TCGContext *s, int temp)
s->current_frame_offset += (tcg_target_long)sizeof(tcg_target_long);
}
+/* sync register 'reg' by saving it to the corresponding temporary */
+static inline void tcg_reg_sync(TCGContext *s, int reg)
+{
+ TCGTemp *ts;
+ int temp;
+
+ temp = s->reg_to_temp[reg];
+ ts = &s->temps[temp];
+ assert(ts->val_type == TEMP_VAL_REG);
+ if (!ts->mem_coherent && !ts->fixed_reg) {
+ if (!ts->mem_allocated) {
+ temp_allocate_frame(s, temp);
+ }
+ tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
+ }
+ ts->mem_coherent = 1;
+}
+
/* free register 'reg' by spilling the corresponding temporary if necessary */
static void tcg_reg_free(TCGContext *s, int reg)
{
- TCGTemp *ts;
int temp;
temp = s->reg_to_temp[reg];
if (temp != -1) {
- ts = &s->temps[temp];
- assert(ts->val_type == TEMP_VAL_REG);
- if (!ts->mem_coherent) {
- if (!ts->mem_allocated)
- temp_allocate_frame(s, temp);
- tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
- }
- ts->val_type = TEMP_VAL_MEM;
+ tcg_reg_sync(s, reg);
+ s->temps[temp].val_type = TEMP_VAL_MEM;
s->reg_to_temp[reg] = -1;
}
}
--
1.7.10.4
[Qemu-devel] [PATCH v2 08/26] tcg: always mark dead input arguments as dead, Aurelien Jarno, 2012/10/09
[Qemu-devel] [PATCH v2 26/26] tcg: remove compatiblity call flags, Aurelien Jarno, 2012/10/09