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* [gcc(refs/users/meissner/heads/work119)] Combine vec_extract of V4SF with DF convert with constant element.
@ 2023-04-21 23:20 Michael Meissner
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From: Michael Meissner @ 2023-04-21 23:20 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:90d911557e5dcfc40d07be3cfda82a497e1c0135
commit 90d911557e5dcfc40d07be3cfda82a497e1c0135
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Fri Apr 21 19:20:33 2023 -0400
Combine vec_extract of V4SF with DF convert with constant element.
This patch adds a combine insn that merges loading up a vec_extract of V4SFmode
where the element number is constant combined with a conversion to DFmode.
2023-04-21 Michael Meissner <meissner@linux.ibm.com>
gcc/
* config/rs6000/vsx.md (vsx_extract_v4sf_to_df_load): New insn.
Diff:
---
gcc/config/rs6000/vsx.md | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index 417aff5e24b..7a5daa65472 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -3549,6 +3549,7 @@
[(set_attr "length" "8")
(set_attr "type" "fp")])
+;; V4SF extract from memory with constant element number.
(define_insn_and_split "*vsx_extract_v4sf_load"
[(set (match_operand:SF 0 "register_operand" "=f,v,v,?r")
(vec_select:SF
@@ -3567,6 +3568,27 @@
(set_attr "length" "8")
(set_attr "isa" "*,p7v,p9v,*")])
+;; V4SF extract from memory with constant element number and convert to DFmode.
+(define_insn_and_split "*vsx_extract_v4sf_load_to_df"
+ [(set (match_operand:DF 0 "register_operand" "=f,v,v")
+ (float_extend:DF
+ (vec_select:SF
+ (match_operand:V4SF 1 "memory_operand" "m,Z,m")
+ (parallel [(match_operand:QI 2 "const_0_to_3_operand" "n,n,n")]))))
+ (clobber (match_scratch:P 3 "=&b,&b,&b"))]
+ "VECTOR_MEM_VSX_P (V4SFmode)"
+ "#"
+ "&& reload_completed"
+ [(set (match_dup 0)
+ (float_extend:DF (match_dup 4)))]
+{
+ operands[4] = rs6000_adjust_vec_address (operands[0], operands[1], operands[2],
+ operands[3], SFmode);
+}
+ [(set_attr "type" "fpload")
+ (set_attr "length" "8")
+ (set_attr "isa" "*,p7v,p9v")])
+
;; Variable V4SF extract from a register
(define_insn_and_split "vsx_extract_v4sf_var"
[(set (match_operand:SF 0 "gpc_reg_operand" "=wa")
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