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src/cpu/aarch64/vm/aarch64.ad
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rev 11237 : 8156943: aarch64: string compare does not support CompactStrings
Summary: Implement LL encoding for StrComp intrinsic
Reviewed-by: aph
*** 3328,3338 ****
//=============================================================================
const bool Matcher::match_rule_supported(int opcode) {
switch (opcode) {
- case Op_StrComp:
case Op_StrIndexOf:
if (CompactStrings) return false;
break;
default:
break;
--- 3328,3337 ----
*** 14946,14956 ****
// Count is in 8-bit bytes; non-Compact chars are 16 bits.
__ asrw($cnt1$$Register, $cnt1$$Register, 1);
__ asrw($cnt2$$Register, $cnt2$$Register, 1);
__ string_compare($str1$$Register, $str2$$Register,
$cnt1$$Register, $cnt2$$Register, $result$$Register,
! $tmp1$$Register);
%}
ins_pipe(pipe_class_memory);
%}
instruct string_indexof(iRegP_R1 str1, iRegI_R4 cnt1, iRegP_R3 str2, iRegI_R2 cnt2,
--- 14945,14971 ----
// Count is in 8-bit bytes; non-Compact chars are 16 bits.
__ asrw($cnt1$$Register, $cnt1$$Register, 1);
__ asrw($cnt2$$Register, $cnt2$$Register, 1);
__ string_compare($str1$$Register, $str2$$Register,
$cnt1$$Register, $cnt2$$Register, $result$$Register,
! $tmp1$$Register, StrIntrinsicNode::UU);
! %}
! ins_pipe(pipe_class_memory);
! %}
!
! instruct string_compareL(iRegP_R1 str1, iRegI_R2 cnt1, iRegP_R3 str2, iRegI_R4 cnt2,
! iRegI_R0 result, iRegP_R10 tmp1, rFlagsReg cr)
! %{
! predicate(((StrCompNode*)n)->encoding() == StrIntrinsicNode::LL);
! match(Set result (StrComp (Binary str1 cnt1) (Binary str2 cnt2)));
! effect(KILL tmp1, USE_KILL str1, USE_KILL str2, USE_KILL cnt1, USE_KILL cnt2, KILL cr);
!
! format %{ "String Compare $str1,$cnt1,$str2,$cnt2 -> $result # KILL $tmp1" %}
! ins_encode %{
! __ string_compare($str1$$Register, $str2$$Register,
! $cnt1$$Register, $cnt2$$Register, $result$$Register,
! $tmp1$$Register, StrIntrinsicNode::LL);
%}
ins_pipe(pipe_class_memory);
%}
instruct string_indexof(iRegP_R1 str1, iRegI_R4 cnt1, iRegP_R3 str2, iRegI_R2 cnt2,
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