Ira Rosen <ira.ro...@linaro.org> wrote:
> (define_insn "neon_vzip<mode>_internal"
> [(set (match_operand:VDQW 0 "s_register_operand" "=w")
> (unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "0")]
> UNSPEC_VZIP1))
> (set (match_operand:VDQW 2 "s_register_operand" "=w")
> (unspec:VDQW [(match_operand:VDQW 3 "s_register_operand" "2")]
> UNSPEC_VZIP2))]
> "TARGET_NEON"
> "vzip.<V_sz_elem>\t%<V_reg>0, %<V_reg>2"
> [(set (attr "neon_type")
> (if_then_else (ne (symbol_ref "<Is_d_reg>") (const_int 0))
> (const_string "neon_bp_simple")
> (const_string "neon_bp_3cycle")))]
> )
>
> Is there a way to properly mark the dependence?
I guess you need to make sure the UNSPEC_VZIP forms both explicitly
depend on both input operands. This can be a bit tricky due to
various reload constraints on how matching constraints and/or
match_dup can be used, but I think something along the following
lines should work:
[(set (match_operand:VDQW 0 "s_register_operand" "=w")
(unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "0")
(match_operand:VDQW 2 "s_register_operand" "w")]
UNSPEC_VZIP1))
(set (match_operand:VDQW 3 "s_register_operand" "=2")
(unspec:VDQW [(match_dup 1) (match_dup 2)]
UNSPEC_VZIP2))]
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
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STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
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