On 09/08/2015 01:19 AM, Peter Maydell wrote:
> The tcg common code isn't smart enough to notice it only
> needs to calculate not(t1) once ?
Correct, we do no value numbering or cse.
> In the overwhelmingly common case (x86 tcg backend)
> we would save an insn every time, right?
Yes. It all depe
On 8 September 2015 at 06:18, Richard Henderson wrote:
> On 09/07/2015 10:31 AM, Peter Maydell wrote:
>>>
>>> -if (cond < 0x0e) { /* continue */
>>> -gen_set_label(label_continue);
>>> +/* If COND was false, force the flags to #nzcv.
>>> + Note that T1 = (COND ? 0 : -1), T2 =
On 09/07/2015 10:31 AM, Peter Maydell wrote:
-if (cond < 0x0e) { /* continue */
-gen_set_label(label_continue);
+/* If COND was false, force the flags to #nzcv.
+ Note that T1 = (COND ? 0 : -1), T2 = (COND ? -1 : 0). */
+tcg_t1 = tcg_temp_new_i32();
+tcg_t2 = tcg_te
On 2 September 2015 at 18:57, Richard Henderson wrote:
> This can allow much of a ccmp to be elided when particular
> flags are subsequently dead.
>
> Signed-off-by: Richard Henderson
> ---
> target-arm/translate-a64.c | 65
> +++---
> 1 file changed, 44
This can allow much of a ccmp to be elided when particular
flags are subsequently dead.
Signed-off-by: Richard Henderson
---
target-arm/translate-a64.c | 65 +++---
1 file changed, 44 insertions(+), 21 deletions(-)
diff --git a/target-arm/translate-a64.c
