[PULL v3 4/4] Hexagon (gen_tcg_funcs.py): avoid duplicated tcg code on A_CVI_NEW

[Taylor Simpson]

From: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>

Hexagon instructions with the A_CVI_NEW attribute produce a vector value
that can be used in the same packet. The python function responsible for
generating code for such instructions has a typo ("if" instead of
"elif"), which makes genptr_dst_write_ext() be executed twice, thus also
generating the same tcg code twice. Fortunately, this doesn't cause any
problems for correctness, but it is less efficient than it could be. Fix
it by using an "elif" and avoiding the unnecessary extra code gen.

Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: 
<fa706b192b2a3a0ffbd399fa8dbf0d5b2c5b82d9.1664568492.git.quic_mathbern@quicinc.com>
---
 target/hexagon/gen_tcg_funcs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/hexagon/gen_tcg_funcs.py b/target/hexagon/gen_tcg_funcs.py
index d72c689ad7..6dea02b0b9 100755
--- a/target/hexagon/gen_tcg_funcs.py
+++ b/target/hexagon/gen_tcg_funcs.py
@@ -548,7 +548,7 @@ def genptr_dst_write_opn(f,regtype, regid, tag):
         if (hex_common.is_hvx_reg(regtype)):
             if (hex_common.is_new_result(tag)):
                 genptr_dst_write_ext(f, tag, regtype, regid, "EXT_NEW")
-            if (hex_common.is_tmp_result(tag)):
+            elif (hex_common.is_tmp_result(tag)):
                 genptr_dst_write_ext(f, tag, regtype, regid, "EXT_TMP")
             else:
                 genptr_dst_write_ext(f, tag, regtype, regid, "EXT_DFL")
-- 
2.17.1