8370579: PPC: fix inswri immediate argument order

Backport-of: 9625993

Author: dbriemann

src/hotspot/cpu/ppc/ppc.ad

@@ -13073,27 +13073,27 @@ instruct countTrailingZerosL_cnttzd(iRegIdst dst, iRegLsrc src) %{
 %}
 
 // Expand nodes for byte_reverse_int.
-instruct insrwi_a(iRegIdst dst, iRegIsrc src, immI16 pos, immI16 shift) %{
-  effect(DEF dst, USE src, USE pos, USE shift);
+instruct insrwi_a(iRegIdst dst, iRegIsrc src, immI16 n, immI16 b) %{
+  effect(DEF dst, USE src, USE n, USE b);
   predicate(false);
 
-  format %{ "INSRWI  $dst, $src, $pos, $shift" %}
+  format %{ "INSRWI  $dst, $src, $n, $b" %}
   size(4);
   ins_encode %{
-    __ insrwi($dst$$Register, $src$$Register, $shift$$constant, $pos$$constant);
+    __ insrwi($dst$$Register, $src$$Register, $n$$constant, $b$$constant);
   %}
   ins_pipe(pipe_class_default);
 %}
 
 // As insrwi_a, but with USE_DEF.
-instruct insrwi(iRegIdst dst, iRegIsrc src, immI16 pos, immI16 shift) %{
-  effect(USE_DEF dst, USE src, USE pos, USE shift);
+instruct insrwi(iRegIdst dst, iRegIsrc src, immI16 n, immI16 b) %{
+  effect(USE_DEF dst, USE src, USE n, USE b);
   predicate(false);
 
-  format %{ "INSRWI  $dst, $src, $pos, $shift" %}
+  format %{ "INSRWI  $dst, $src, $n, $b" %}
   size(4);
   ins_encode %{
-    __ insrwi($dst$$Register, $src$$Register, $shift$$constant, $pos$$constant);
+    __ insrwi($dst$$Register, $src$$Register, $n$$constant, $b$$constant);
   %}
   ins_pipe(pipe_class_default);
 %}
@@ -13115,12 +13115,12 @@ instruct bytes_reverse_int_Ex(iRegIdst dst, iRegIsrc src) %{
     iRegLdst tmpI3;
 
     urShiftI_reg_imm(tmpI1, src, imm24);
-    insrwi_a(dst, tmpI1, imm24, imm8);
+    insrwi_a(dst, tmpI1, imm8, imm24);
     urShiftI_reg_imm(tmpI2, src, imm16);
-    insrwi(dst, tmpI2, imm8, imm16);
+    insrwi(dst, tmpI2, imm16, imm8);
     urShiftI_reg_imm(tmpI3, src, imm8);
     insrwi(dst, tmpI3, imm8, imm8);
-    insrwi(dst, src, imm0, imm8);
+    insrwi(dst, src, imm8, imm0);
   %}
 %}
 
@@ -13238,7 +13238,7 @@ instruct bytes_reverse_ushort_Ex(iRegIdst dst, iRegIsrc src) %{
     immI16   imm8 %{ (int)  8 %}
 
     urShiftI_reg_imm(dst, src, imm8);
-    insrwi(dst, src, imm16, imm8);
+    insrwi(dst, src, imm8, imm16);
   %}
 %}
 
@@ -13267,7 +13267,7 @@ instruct bytes_reverse_short_Ex(iRegIdst dst, iRegIsrc src) %{
     iRegLdst tmpI1;
 
     urShiftI_reg_imm(tmpI1, src, imm8);
-    insrwi(tmpI1, src, imm16, imm8);
+    insrwi(tmpI1, src, imm8, imm16);
     extsh(dst, tmpI1);
   %}
 %}