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* [gcc(refs/users/meissner/heads/work082)] Allow vsx_extract_<mode> to use Altivec registers
@ 2022-03-24 18:24 Michael Meissner
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From: Michael Meissner @ 2022-03-24 18:24 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:0d069a082308af1a8c9531105eb177061d02346a
commit 0d069a082308af1a8c9531105eb177061d02346a
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Thu Mar 24 14:23:56 2022 -0400
Allow vsx_extract_<mode> to use Altivec registers
In looking at PR target/99293, I noticed that the vsx_extract_<mode>
pattern for V2DImode and V2DFmode only allowed traditional floating point
registers, and it did not allow Altivec registers. The original code was
written a few years ago when we used the old register allocator, and
support for scalar floating point in Altivec registers was just being
added to GCC.
2022-03-24 Michael Meissner <meissner@linux.ibm.com>
gcc/
PR target/99392
* config/rs6000/rs6000.md (vsx_extract_<mode>): Allow destination
to be an Altivec register.
Diff:
---
gcc/config/rs6000/vsx.md | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index 14bae36317e..986f23b426b 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -3397,15 +3397,12 @@
;; Optimize cases were we can do a simple or direct move.
;; Or see if we can avoid doing the move at all
-;; There are some unresolved problems with reload that show up if an Altivec
-;; register was picked. Limit the scalar value to FPRs for now.
-
(define_insn "vsx_extract_<mode>"
- [(set (match_operand:<VS_scalar> 0 "gpc_reg_operand" "=d, d, wr, wr")
+ [(set (match_operand:<VS_scalar> 0 "gpc_reg_operand" "=wa, wa, wr, wr")
(vec_select:<VS_scalar>
- (match_operand:VSX_D 1 "gpc_reg_operand" "wa, wa, wa, wa")
+ (match_operand:VSX_D 1 "gpc_reg_operand" "wa, wa, wa, wa")
(parallel
- [(match_operand:QI 2 "const_0_to_1_operand" "wD, n, wD, n")])))]
+ [(match_operand:QI 2 "const_0_to_1_operand" "wD, n, wD, n")])))]
"VECTOR_MEM_VSX_P (<MODE>mode)"
{
int element = INTVAL (operands[2]);
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