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8314618: RISC-V: -XX:MaxVectorSize does not work as expected

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Reviewed-by: fyang, dzhang
This commit is contained in:
Gui Cao 2023-08-22 02:47:52 +00:00 committed by Fei Yang
parent 87298d2ade
commit a66b5df14a
2 changed files with 3 additions and 3 deletions
src/hotspot/cpu/riscv
riscv_v.advm_version_riscv.cpp

4
src/hotspot/cpu/riscv/riscv_v.ad

@ -880,7 +880,7 @@ instruct vmla(vReg dst_src1, vReg src2, vReg src3) %{
match(Set dst_src1 (AddVI dst_src1 (MulVI src2 src3)));
match(Set dst_src1 (AddVL dst_src1 (MulVL src2 src3)));
ins_cost(VEC_COST);
format %{ "vmla $dst_src1, $dst_src1, src2, src3" %}
format %{ "vmla $dst_src1, $dst_src1, $src2, $src3" %}
ins_encode %{
BasicType bt = Matcher::vector_element_basic_type(this);
__ vsetvli_helper(bt, Matcher::vector_length(this));
@ -916,7 +916,7 @@ instruct vmls(vReg dst_src1, vReg src2, vReg src3) %{
match(Set dst_src1 (SubVI dst_src1 (MulVI src2 src3)));
match(Set dst_src1 (SubVL dst_src1 (MulVL src2 src3)));
ins_cost(VEC_COST);
format %{ "vmls $dst_src1, $dst_src1, src2, src3" %}
format %{ "vmls $dst_src1, $dst_src1, $src2, $src3" %}
ins_encode %{
BasicType bt = Matcher::vector_element_basic_type(this);
__ vsetvli_helper(bt, Matcher::vector_length(this));

2
src/hotspot/cpu/riscv/vm_version_riscv.cpp

@ -267,8 +267,8 @@ void VM_Version::c2_initialize() {
if (MaxVectorSize > _initial_vector_length) {
warning("Current system only supports max RVV vector length %d. Set MaxVectorSize to %d",
_initial_vector_length, _initial_vector_length);
MaxVectorSize = _initial_vector_length;
}
MaxVectorSize = _initial_vector_length;
} else {
vm_exit_during_initialization(err_msg("Unsupported MaxVectorSize: %d", (int)MaxVectorSize));
}