Split the movxo pattern into DMF and non-DMF variants. Use DMF move instructions (dmxxinstdmr512, dmmr, and dmxxextfdmr512) for accumulator/DMR moves while retaining the existing split for non-DMR operands.
2026-07-15 Vijay Shankar <[email protected]> gcc/ChangeLog: * config/rs6000/mma.md (*movxo): renamed to movxo_nodmf (*movxo_nodmf): updated contraint to use wD and add !TARGET_DMF (*movxo_dmf): New pattern to handle dmf insert/extract from vsx --- gcc/config/rs6000/mma.md | 33 +++++++++++++++++++++++++++++---- 1 file changed, 29 insertions(+), 4 deletions(-) diff --git a/gcc/config/rs6000/mma.md b/gcc/config/rs6000/mma.md index 1fadc5cd886..2c0ddc280a2 100644 --- a/gcc/config/rs6000/mma.md +++ b/gcc/config/rs6000/mma.md @@ -341,10 +341,10 @@ (define_expand "movxo" gcc_assert (false); }) -(define_insn_and_split "*movxo" - [(set (match_operand:XO 0 "nonimmediate_operand" "=d,ZwO,d") - (match_operand:XO 1 "input_operand" "ZwO,d,d"))] - "TARGET_MMA +(define_insn_and_split "*movxo_nodmf" + [(set (match_operand:XO 0 "nonimmediate_operand" "=wD,ZwO,wD") + (match_operand:XO 1 "input_operand" "ZwO,wD,wD"))] + "TARGET_MMA && !TARGET_DMF && (gpc_reg_operand (operands[0], XOmode) || gpc_reg_operand (operands[1], XOmode))" "@ @@ -361,6 +361,31 @@ (define_insn_and_split "*movxo" (set_attr "length" "*,*,16") (set_attr "max_prefixed_insns" "2,2,*")]) +(define_insn_and_split "*movxo_dmf" + [(set (match_operand:XO 0 "nonimmediate_operand" "=wa,ZwO,wa,wD,wD,wa") + (match_operand:XO 1 "input_operand" "ZwO,wa, wa,wa,wD,wD"))] + "TARGET_DMF + && (gpc_reg_operand (operands[0], XOmode) + || gpc_reg_operand (operands[1], XOmode))" + "@ + # + # + # + dmxxinstdmr512 %0,%x1,%Y1,0 + dmmr %0,%1 + dmxxextfdmr512 %x0,%Y0,%1,0" + "&& reload_completed + && !dmr_register_operand (operands[0], XOmode) + && !dmr_register_operand (operands[1], XOmode)" + [(const_int 0)] +{ + rs6000_split_multireg_move (operands[0], operands[1]); + DONE; +} + [(set_attr "type" "vecload,vecstore,veclogical,dmf,dmf,dmf") + (set_attr "length" "*,*,16,*,*,*") + (set_attr "max_prefixed_insns" "2,2,*,*,*,*")]) + (define_expand "vsx_assemble_pair" [(match_operand:OO 0 "vsx_register_operand") (match_operand:V16QI 1 "mma_assemble_input_operand") -- 2.52.0
