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[PATCH, rs6000] int128 sign extention instructions (partial prereq) 

Hi
  This is a sub-set of the 128-bit sign extension support patch series
  that will be fully implemented in a subsequent patch from Carl.
  This is a necessary pre-requisite for the vector-load/store rightmost
  element patch that follows in this thread.

  [v2] Refreshed and touched up per review comments.
  - updated set_attr entries.  removed superfluous set_attr entries.
  - moved define_insn and define_expand entries to vsx.md.


gcc/ChangeLog:
	* config/rs6000/vsx.md (enum unspec): Add
	UNSPEC_EXTENDDITI2 and UNSPEC_MTVSRD_DITI_W1 entries.
	(mtvsrdd_diti_w1, extendditi2_vector): New define_insns.
	(extendditi2): New define_expand.
This commit is contained in:
Will Schmidt 2020-09-17 17:17:15 -05:00
parent dfb7345cd5
commit 8732511910
1 changed files with 33 additions and 0 deletions
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33
gcc/config/rs6000/vsx.md
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@ -352,6 +352,8 @@
UNSPEC_VSX_FIRST_MISMATCH_EOS_INDEX
UNSPEC_XXGENPCV
UNSPEC_MTVSBM
UNSPEC_EXTENDDITI2
UNSPEC_MTVSRD_DITI_W1
UNSPEC_VCNTMB
UNSPEC_VEXPAND
UNSPEC_VEXTRACT
@ -4795,6 +4797,37 @@
"vextsw2d %0,%1"
[(set_attr "type" "vecexts")])
;; ISA 3.1 vector sign extend
;; Move DI value from GPR to TI mode in VSX register, word 1.
(define_insn "mtvsrdd_diti_w1"
[(set (match_operand:TI 0 "register_operand" "=wa")
(unspec:TI [(match_operand:DI 1 "register_operand" "r")]
UNSPEC_MTVSRD_DITI_W1))]
"TARGET_POWERPC64 && TARGET_DIRECT_MOVE"
"mtvsrdd %x0,0,%1"
[(set_attr "type" "vecmove")])
;; Sign extend 64-bit value in TI reg, word 1, to 128-bit value in TI reg
(define_insn "extendditi2_vector"
[(set (match_operand:TI 0 "gpc_reg_operand" "=v")
(unspec:TI [(match_operand:TI 1 "gpc_reg_operand" "v")]
UNSPEC_EXTENDDITI2))]
"TARGET_POWER10"
"vextsd2q %0,%1"
[(set_attr "type" "vecexts")])
(define_expand "extendditi2"
[(set (match_operand:TI 0 "gpc_reg_operand")
(sign_extend:DI (match_operand:DI 1 "gpc_reg_operand")))]
"TARGET_POWER10"
{
/* Move 64-bit src from GPR to vector reg and sign extend to 128-bits. */
rtx temp = gen_reg_rtx (TImode);
emit_insn (gen_mtvsrdd_diti_w1 (temp, operands[1]));
emit_insn (gen_extendditi2_vector (operands[0], temp));
DONE;
})
;; ISA 3.0 Binary Floating-Point Support