public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc(refs/users/meissner/heads/work085)] Replace UNSPEC with RTL code for extendditi2.
@ 2022-04-07 20:19 Michael Meissner
0 siblings, 0 replies; only message in thread
From: Michael Meissner @ 2022-04-07 20:19 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:2fe27fea89a31b19975fa299ff6cb7aa8adb4a79
commit 2fe27fea89a31b19975fa299ff6cb7aa8adb4a79
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Thu Apr 7 16:19:11 2022 -0400
Replace UNSPEC with RTL code for extendditi2.
When I submitted my patch on March 12th for extendditi2, Segher wished I
had removed the use of the UNSPEC for the vextsd2q instruction. This
patch rewrites extendditi2_vector to use VEC_SELECT rather than UNSPEC.
2022-04-07 Michael Meissner <meissner@linux.ibm.com>
gcc/
* config/rs6000/vsx.md (UNSPEC_EXTENDDITI2): Delete.
(extendditi2_vector): Rewrite to use VEC_SELECT as a
define_expand.
(extendditi2_vector2): New insn.
Diff:
---
gcc/config/rs6000/vsx.md | 22 ++++++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index a1a1ce95195..c091e5e2f47 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -358,7 +358,6 @@
UNSPEC_VSX_FIRST_MISMATCH_EOS_INDEX
UNSPEC_XXGENPCV
UNSPEC_MTVSBM
- UNSPEC_EXTENDDITI2
UNSPEC_VCNTMB
UNSPEC_VEXPAND
UNSPEC_VEXTRACT
@@ -5083,10 +5082,25 @@
(set_attr "type" "shift,load,vecmove,vecperm,load")])
;; Sign extend 64-bit value in TI reg, word 1, to 128-bit value in TI reg
-(define_insn "extendditi2_vector"
+(define_expand "extendditi2_vector"
+ [(use (match_operand:TI 0 "gpc_reg_operand"))
+ (use (match_operand:TI 1 "gpc_reg_operand"))]
+ "TARGET_POWER10"
+{
+ rtx dest = operands[0];
+ rtx src_v2di = gen_lowpart (V2DImode, operands[1]);
+ rtx element = GEN_INT (VECTOR_ELEMENT_SCALAR_64BIT);
+
+ emit_insn (gen_extendditi2_vector2 (dest, src_v2di, element));
+ DONE;
+})
+
+(define_insn "extendditi2_vector2"
[(set (match_operand:TI 0 "gpc_reg_operand" "=v")
- (unspec:TI [(match_operand:TI 1 "gpc_reg_operand" "v")]
- UNSPEC_EXTENDDITI2))]
+ (sign_extend:TI
+ (vec_select:DI
+ (match_operand:V2DI 1 "gpc_reg_operand" "v")
+ (parallel [(match_operand 2 "vsx_scalar_64bit" "wD")]))))]
"TARGET_POWER10"
"vextsd2q %0,%1"
[(set_attr "type" "vecexts")])
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-04-07 20:19 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-04-07 20:19 [gcc(refs/users/meissner/heads/work085)] Replace UNSPEC with RTL code for extendditi2 Michael Meissner
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).