[gcc/devel/c++-modules] i386: Add SSE2 alternative to mmx_pswapd2vsi2

[Nathan Sidwell]

https://gcc.gnu.org/g:9f0cb44e9b1da3676879b73728b31d421a8b1178

commit 9f0cb44e9b1da3676879b73728b31d421a8b1178
Author: Uros Bizjak <ubizjak@gmail.com>
Date:   Tue May 26 18:51:37 2020 +0200

    i386: Add SSE2 alternative to mmx_pswapd2vsi2
    
    2020-05-26  Uroš Bizjak  <ubizjak@gmail.com>
    
    gcc/ChangeLog:
            * config/i386/mmx.md (mmx_pswapdv2si2): Add SSE2 alternative.

Diff:
---
 gcc/config/i386/mmx.md | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
index c31b4f81079..215162dedb5 100644
--- a/gcc/config/i386/mmx.md
+++ b/gcc/config/i386/mmx.md
@@ -2011,15 +2011,21 @@
    (set_attr "mode" "TI")])
 
 (define_insn "mmx_pswapdv2si2"
-  [(set (match_operand:V2SI 0 "register_operand" "=y")
+  [(set (match_operand:V2SI 0 "register_operand" "=y,Yv")
 	(vec_select:V2SI
-	  (match_operand:V2SI 1 "nonimmediate_operand" "ym")
+	  (match_operand:V2SI 1 "register_mmxmem_operand" "ym,Yv")
 	  (parallel [(const_int 1) (const_int 0)])))]
-  "TARGET_3DNOW_A"
-  "pswapd\t{%1, %0|%0, %1}"
-  [(set_attr "type" "mmxcvt")
-   (set_attr "prefix_extra" "1")
-   (set_attr "mode" "DI")])
+  "TARGET_3DNOW_A || TARGET_MMX_WITH_SSE"
+  "@
+   pswapd\t{%1, %0|%0, %1}
+   %vpshufd\t{$0xe1, %1, %0|%0, %1, 0xe1}";
+  [(set_attr "isa" "*,sse2")
+   (set_attr "mmx_isa" "native,*")
+   (set_attr "type" "mmxcvt,sselog1")
+   (set_attr "prefix_extra" "1,*")
+   (set_attr "prefix_data16" "*,1")
+   (set_attr "length_immediate" "*,1")
+   (set_attr "mode" "DI,TI")])
 
 (define_insn "*vec_dupv4hi"
   [(set (match_operand:V4HI 0 "register_operand" "=y,xYw")