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[1/2] IBM Z: Improve FPRX2 <-> TF conversions

Message ID 20210218125709.16119-2-iii@linux.ibm.com
State New
Headers show
Series IBM Z: Fix long double <-> DFP conversions | expand

Commit Message

Ilya Leoshkevich Feb. 18, 2021, 12:57 p.m. UTC 
gcc/ChangeLog:

	* config/s390/vector.md (*fprx2_to_tf): Rename to fprx2_to_tf,
	add memory alternative.
	(tf_to_fprx2): New pattern.
---
 gcc/config/s390/vector.md | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)
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Patch

diff --git a/gcc/config/s390/vector.md b/gcc/config/s390/vector.md
index 0e3c31f5d4f..e48c965db00 100644
--- a/gcc/config/s390/vector.md
+++ b/gcc/config/s390/vector.md
@@ -616,12 +616,23 @@ 
    vlvgp\t%v0,%1,%N1"
   [(set_attr "op_type" "VRR,VRX,VRX,VRI,VRR")])
 
-(define_insn "*fprx2_to_tf"
-  [(set (match_operand:TF               0 "nonimmediate_operand" "=v")
-	(subreg:TF (match_operand:FPRX2 1 "general_operand"       "f") 0))]
+(define_insn_and_split "fprx2_to_tf"
+  [(set (match_operand:TF               0 "nonimmediate_operand" "=v,AR")
+	(subreg:TF (match_operand:FPRX2 1 "general_operand"       "f,f") 0))]
   "TARGET_VXE"
-  "vmrhg\t%v0,%1,%N1"
-  [(set_attr "op_type" "VRR")])
+  "@
+   vmrhg\t%v0,%1,%N1
+   #"
+  "!(MEM_P (operands[0]) && MEM_VOLATILE_P (operands[0]))"
+  [(set (match_dup 2) (match_dup 3))
+   (set (match_dup 4) (match_dup 5))]
+{
+  operands[2] = simplify_gen_subreg (DFmode, operands[0], TFmode, 0);
+  operands[3] = simplify_gen_subreg (DFmode, operands[1], FPRX2mode, 0);
+  operands[4] = simplify_gen_subreg (DFmode, operands[0], TFmode, 8);
+  operands[5] = simplify_gen_subreg (DFmode, operands[1], FPRX2mode, 8);
+}
+  [(set_attr "op_type" "VRR,*")])
 
 (define_insn "*vec_ti_to_v1ti"
   [(set (match_operand:V1TI                   0 "nonimmediate_operand" "=v,v,R,  v,  v,v")
@@ -753,6 +764,21 @@ 
   "vpdi\t%V0,%v1,%V0,5"
   [(set_attr "op_type" "VRR")])
 
+(define_insn_and_split "tf_to_fprx2"
+  [(set (match_operand:FPRX2            0 "nonimmediate_operand" "=f,f")
+	(subreg:FPRX2 (match_operand:TF 1 "general_operand"       "v,AR") 0))]
+  "TARGET_VXE"
+  "#"
+  "!(MEM_P (operands[1]) && MEM_VOLATILE_P (operands[1]))"
+  [(set (match_dup 2) (match_dup 3))
+   (set (match_dup 4) (match_dup 5))]
+{
+  operands[2] = simplify_gen_subreg (DFmode, operands[0], FPRX2mode, 0);
+  operands[3] = simplify_gen_subreg (DFmode, operands[1], TFmode, 0);
+  operands[4] = simplify_gen_subreg (DFmode, operands[0], FPRX2mode, 8);
+  operands[5] = simplify_gen_subreg (DFmode, operands[1], TFmode, 8);
+})
+
 ; vec_perm_const for V2DI using vpdi?
 
 ;;