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* [gcc(refs/users/meissner/heads/work081)] Add zero_extendditi2.
@ 2022-03-14 22:21 Michael Meissner
0 siblings, 0 replies; 2+ messages in thread
From: Michael Meissner @ 2022-03-14 22:21 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:77690bf992b2b6fca39ae99b721081eff3fb5f1f
commit 77690bf992b2b6fca39ae99b721081eff3fb5f1f
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Mon Mar 14 18:20:53 2022 -0400
Add zero_extendditi2.
2022-03-14 Michael Meissner <meissner@linux.ibm.com>
gcc/
* config/rs6000/vsx.md (zero_extendditi2): New insn.
Diff:
---
gcc/config/rs6000/vsx.md | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index c9d94032580..2f3241e5f6e 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -5119,6 +5119,57 @@
"vextsd2q %0,%1"
[(set_attr "type" "vecexts")])
+;; Zero extend DImode to TImode when the result is in GPRs or VSX registers.
+(define_insn_and_split "zero_extendditi2"
+ [(set (match_operand:TI 0 "gpc_reg_operand" "=r, r, wa, wa")
+ (zero_extend:TI
+ (match_operand:DI 1 "gpc_reg_operand" "r, wa, r, wa")))
+ (clobber (match_scratch:DI 2 "=&X, X, X, wa"))]
+ "TARGET_POWERPC64 && TARGET_P9_VECTOR"
+ "@
+ #
+ #
+ mtvsrdd %x0,0,%1
+ #"
+ "&& reload_completed
+ && (int_reg_operand (operands[0], TImode)
+ || vsx_register_operand (operands[1], DImode))"
+ [(pc)]
+{
+ rtx dest = operands[0];
+ rtx src = operands[1];
+ int dest_regno = reg_or_subregno (dest);
+
+ /* Handle conversion to GPR registers. Load up the low part and then load
+ 0 to clear the upper part. */
+ if (INT_REGNO_P (dest_regno))
+ {
+ rtx dest_hi = gen_highpart (DImode, dest);
+ rtx dest_lo = gen_lowpart (DImode, dest);
+
+ emit_move_insn (dest_lo, src);
+ emit_move_insn (dest_hi, const0_rtx);
+ DONE;
+ }
+
+ /* For conversion to a VSX register from a VSX register, do a CONCAT
+ operation with the upper word set to 0. */
+ else if (VSX_REGNO_P (dest_regno))
+ {
+ rtx tmp = operands[2];
+ rtx dest_v2di = gen_rtx_REG (V2DImode, dest_regno);
+
+ emit_move_insn (tmp, const0_rtx);
+ emit_insn (gen_vsx_concat_v2di (dest_v2di, tmp, src));
+ DONE;
+ }
+
+ else
+ gcc_unreachable ();
+}
+ [(set_attr "length" "8,8,*,8")
+ (set_attr "type" "*,mfvsr,mtvsr,vecperm")])
+
\f
;; ISA 3.0 Binary Floating-Point Support
^ permalink raw reply [flat|nested] 2+ messages in thread
* [gcc(refs/users/meissner/heads/work081)] Add zero_extendditi2.
@ 2022-03-15 21:47 Michael Meissner
0 siblings, 0 replies; 2+ messages in thread
From: Michael Meissner @ 2022-03-15 21:47 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:257c0baeaf1280a4f6e6ecb137d38151176f17a8
commit 257c0baeaf1280a4f6e6ecb137d38151176f17a8
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Tue Mar 15 17:46:41 2022 -0400
Add zero_extendditi2.
2022-03-15 Michael Meissner <meissner@linux.ibm.com>
gcc/
* config/rs6000/vsx.md (zero_extendditi2): New insn.
Diff:
---
gcc/config/rs6000/vsx.md | 55 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index 2fab6843c5f..c6dc01e55e3 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -5121,6 +5121,61 @@
"vextsd2q %0,%1"
[(set_attr "type" "vecexts")])
+;; Zero extend DImode to TImode when the result is in GPRs or VSX registers.
+;; If we are on a power10, the combiner will create the lxvrdx pattern if
+;; the value is being loaded from memory.
+(define_insn_and_split "zero_extendditi2"
+ [(set (match_operand:TI 0 "gpc_reg_operand" "=r, r, wa, wa")
+ (zero_extend:TI
+ (match_operand:DI 1 "gpc_reg_operand" "r, wa, r, wa")))
+ (clobber (match_scratch:DI 2 "=X, X, X, &wa"))]
+ "TARGET_POWERPC64 && TARGET_P9_VECTOR"
+ "@
+ #
+ #
+ mtvsrdd %x0,0,%1
+ #"
+ "&& reload_completed
+ && (int_reg_operand (operands[0], TImode)
+ || vsx_register_operand (operands[1], DImode))"
+ [(pc)]
+{
+ rtx dest = operands[0];
+ rtx src = operands[1];
+ int dest_regno = reg_or_subregno (dest);
+
+ /* Handle conversion to GPR registers. Load up the low part and then load
+ 0 to clear the upper part. */
+ if (INT_REGNO_P (dest_regno))
+ {
+ rtx dest_hi = gen_highpart (DImode, dest);
+ rtx dest_lo = gen_lowpart (DImode, dest);
+
+ emit_move_insn (dest_lo, src);
+ emit_move_insn (dest_hi, const0_rtx);
+ DONE;
+ }
+
+ /* For conversion to a VSX register from a VSX register, do a CONCAT
+ operation with the upper word set to 0. */
+ else if (VSX_REGNO_P (dest_regno))
+ {
+ rtx tmp = operands[2];
+ rtx dest_v2di = gen_rtx_REG (V2DImode, dest_regno);
+
+ emit_move_insn (tmp, const0_rtx);
+ if (BYTES_BIG_ENDIAN)
+ emit_insn (gen_vsx_concat_v2di (dest_v2di, tmp, src));
+ else
+ emit_insn (gen_vsx_concat_v2di (dest_v2di, src, tmp));
+ DONE;
+ }
+
+ else
+ gcc_unreachable ();
+}
+ [(set_attr "length" "8,8,*,8")
+ (set_attr "type" "*,mfvsr,mtvsr,vecperm")])
\f
;; ISA 3.0 Binary Floating-Point Support
^ permalink raw reply [flat|nested] 2+ messages in thread
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