changeset 46555:5ada291c5063

8181810: PPC64: Leverage extrdi for bitfield extract Reviewed-by: mdoerr, simonis Contributed-by: Matthew Brandyberry <mbrandy@linux.vnet.ibm.com>
author mdoerr
date Thu, 22 Jun 2017 18:33:41 +0200
parents aa1cfd918c4f
children beb2c322626d
files hotspot/src/cpu/ppc/vm/ppc.ad
diffstat 1 files changed, 39 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/hotspot/src/cpu/ppc/vm/ppc.ad	Thu Jun 22 00:51:07 2017 +0200
+++ b/hotspot/src/cpu/ppc/vm/ppc.ad	Thu Jun 22 18:33:41 2017 +0200
@@ -1,6 +1,6 @@
 //
 // Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
-// Copyright (c) 2012, 2016 SAP SE. All rights reserved.
+// Copyright (c) 2012, 2017 SAP SE. All rights reserved.
 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 //
 // This code is free software; you can redistribute it and/or modify it
@@ -9316,6 +9316,44 @@
   ins_pipe(pipe_class_default);
 %}
 
+// Bitfield Extract: URShiftI + AndI
+instruct andI_urShiftI_regI_immI_immIpow2minus1(iRegIdst dst, iRegIsrc src1, immI src2, immIpow2minus1 src3) %{
+  match(Set dst (AndI (URShiftI src1 src2) src3));
+
+  format %{ "EXTRDI  $dst, $src1, shift=$src2, mask=$src3 \t// int bitfield extract" %}
+  size(4);
+  ins_encode %{
+    // TODO: PPC port $archOpcode(ppc64Opcode_rldicl);
+    int rshift = ($src2$$constant) & 0x1f;
+    int length = log2_long(((jlong) $src3$$constant) + 1);
+    if (rshift + length > 32) {
+      // if necessary, adjust mask to omit rotated bits.
+      length = 32 - rshift;
+    }
+    __ extrdi($dst$$Register, $src1$$Register, length, 64 - (rshift + length));
+  %}
+  ins_pipe(pipe_class_default);
+%}
+
+// Bitfield Extract: URShiftL + AndL
+instruct andL_urShiftL_regL_immI_immLpow2minus1(iRegLdst dst, iRegLsrc src1, immI src2, immLpow2minus1 src3) %{
+  match(Set dst (AndL (URShiftL src1 src2) src3));
+
+  format %{ "EXTRDI  $dst, $src1, shift=$src2, mask=$src3 \t// long bitfield extract" %}
+  size(4);
+  ins_encode %{
+    // TODO: PPC port $archOpcode(ppc64Opcode_rldicl);
+    int rshift  = ($src2$$constant) & 0x3f;
+    int length = log2_long(((jlong) $src3$$constant) + 1);
+    if (rshift + length > 64) {
+      // if necessary, adjust mask to omit rotated bits.
+      length = 64 - rshift;
+    }
+    __ extrdi($dst$$Register, $src1$$Register, length, 64 - (rshift + length));
+  %}
+  ins_pipe(pipe_class_default);
+%}
+
 instruct sxtI_reg(iRegIdst dst, iRegIsrc src) %{
   match(Set dst (ConvL2I (ConvI2L src)));