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* [gcc r10-10398] rs6000: Add unspec wrapper to vsx_assemble_pair
@ 2022-01-15 6:00 Peter Bergner
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From: Peter Bergner @ 2022-01-15 6:00 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:1221c37e515e69c6426994a4a77cb2651747c172
commit r10-10398-g1221c37e515e69c6426994a4a77cb2651747c172
Author: Peter Bergner <bergner@linux.ibm.com>
Date: Fri Jan 14 21:41:03 2022 -0600
rs6000: Add unspec wrapper to vsx_assemble_pair
This backports the trunk handling of vsx_assemble_pair with a unspec
wrapper and splits it late (split2).
2022-01-14 Peter Bergner <bergner@linux.ibm.com>
gcc/
* config/rs6000/mma.md (UNSPEC_VSX_ASSEMBLE): New unspec.
(vsx_assemble_pair): Use mma_assemble_input_operand.
Expand into UNSPEC_VSX_ASSEMBLE wrapper.
(*vsx_assemble_pair): New define_insn_and_split.
* config/rs6000/rs6000.c (rs6000_split_multireg_move): Handle
UNSPEC_VSX_ASSEMBLE.
Diff:
---
gcc/config/rs6000/mma.md | 35 ++++++++++++++++++++++++-----------
gcc/config/rs6000/rs6000.c | 14 ++++++++++----
2 files changed, 34 insertions(+), 15 deletions(-)
diff --git a/gcc/config/rs6000/mma.md b/gcc/config/rs6000/mma.md
index f39a5c8ba99..c267a4c82e2 100644
--- a/gcc/config/rs6000/mma.md
+++ b/gcc/config/rs6000/mma.md
@@ -36,7 +36,8 @@
;; Constants for creating unspecs
(define_c_enum "unspec"
- [UNSPEC_MMA_ASSEMBLE_ACC
+ [UNSPEC_VSX_ASSEMBLE
+ UNSPEC_MMA_ASSEMBLE_ACC
UNSPEC_MMA_PMXVBF16GER2
UNSPEC_MMA_PMXVBF16GER2NN
UNSPEC_MMA_PMXVBF16GER2NP
@@ -350,19 +351,31 @@
(define_expand "vsx_assemble_pair"
[(match_operand:POI 0 "vsx_register_operand")
- (match_operand:V16QI 1 "input_operand")
- (match_operand:V16QI 2 "input_operand")]
+ (match_operand:V16QI 1 "mma_assemble_input_operand")
+ (match_operand:V16QI 2 "mma_assemble_input_operand")]
"TARGET_MMA"
{
- rtx dst;
-
- /* Let the compiler know the code below fully defines our output value. */
- emit_clobber (operands[0]);
+ rtx src = gen_rtx_UNSPEC (POImode,
+ gen_rtvec (2, operands[1], operands[2]),
+ UNSPEC_VSX_ASSEMBLE);
+ emit_move_insn (operands[0], src);
+ DONE;
+})
- dst = simplify_gen_subreg (V16QImode, operands[0], POImode, 0);
- emit_move_insn (dst, operands[1]);
- dst = simplify_gen_subreg (V16QImode, operands[0], POImode, 16);
- emit_move_insn (dst, operands[2]);
+(define_insn_and_split "*vsx_assemble_pair"
+ [(set (match_operand:POI 0 "vsx_register_operand" "=wa")
+ (unspec:POI [(match_operand:V16QI 1 "mma_assemble_input_operand" "mwa")
+ (match_operand:V16QI 2 "mma_assemble_input_operand" "mwa")]
+ UNSPEC_VSX_ASSEMBLE))]
+ "TARGET_MMA"
+ "#"
+ "&& reload_completed"
+ [(const_int 0)]
+{
+ rtx src = gen_rtx_UNSPEC (POImode,
+ gen_rtvec (2, operands[1], operands[2]),
+ UNSPEC_VSX_ASSEMBLE);
+ rs6000_split_multireg_move (operands[0], src);
DONE;
})
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index a9d1769350e..4b473e00be3 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -16018,9 +16018,13 @@ rs6000_split_multireg_move (rtx dst, rtx src)
if (GET_CODE (src) == UNSPEC)
{
- gcc_assert (REG_P (dst)
- && FP_REGNO_P (REGNO (dst))
- && XINT (src, 1) == UNSPEC_MMA_ASSEMBLE_ACC);
+ gcc_assert (XINT (src, 1) == UNSPEC_VSX_ASSEMBLE
+ || XINT (src, 1) == UNSPEC_MMA_ASSEMBLE_ACC);
+ gcc_assert (REG_P (dst));
+ if (GET_MODE (src) == PXImode)
+ gcc_assert (FP_REGNO_P (REGNO (dst)));
+ if (GET_MODE (src) == POImode)
+ gcc_assert (VSX_REGNO_P (REGNO (dst)));
reg_mode = GET_MODE (XVECEXP (src, 0, 0));
int nvecs = XVECLEN (src, 0);
@@ -16033,7 +16037,9 @@ rs6000_split_multireg_move (rtx dst, rtx src)
/* We are writing an accumulator register, so we have to
prime it after we've written it. */
- emit_insn (gen_mma_xxmtacc (dst, dst));
+ if (TARGET_MMA
+ && GET_MODE (dst) == PXImode && FP_REGNO_P (REGNO (dst)))
+ emit_insn (gen_mma_xxmtacc (dst, dst));
return;
}
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