From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:56715) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1THHi2-00018o-Av for qemu-devel@nongnu.org; Thu, 27 Sep 2012 13:17:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1THHi0-0002Qn-Un for qemu-devel@nongnu.org; Thu, 27 Sep 2012 13:17:10 -0400 Received: from hall.aurel32.net ([88.191.126.93]:41378) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1THHi0-0002Qi-OV for qemu-devel@nongnu.org; Thu, 27 Sep 2012 13:17:08 -0400 From: Aurelien Jarno Date: Thu, 27 Sep 2012 19:15:02 +0200 Message-Id: <1348766113-18373-3-git-send-email-aurelien@aurel32.net> In-Reply-To: <1348766113-18373-1-git-send-email-aurelien@aurel32.net> References: <1348766113-18373-1-git-send-email-aurelien@aurel32.net> Subject: [Qemu-devel] [PATCH 02/13] tcg: add tcg_reg_sync() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Aurelien Jarno 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. Signed-off-by: Aurelien Jarno --- tcg/tcg.c | 29 ++++++++++++++++++++--------- 1 file changed, 20 insertions(+), 9 deletions(-) diff --git a/tcg/tcg.c b/tcg/tcg.c index c739a3b..2ac7097 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -1469,22 +1469,33 @@ 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