stan/jdk-24
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

8321282: RISC-V: SpinPause() not implemented

Browse Source 
Reviewed-by: luhenry, fbredberg, fyang
This commit is contained in:
Robbin Ehn 2024-02-15 09:17:52 +00:00
parent 1aae980c54
commit 8cb9b479c5
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/hotspot/os_cpu/linux_riscv/os_linux_riscv.cpp
View File

@ -38,6 +38,7 @@
#include "prims/jvm_misc.hpp"
#include "runtime/arguments.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/globals.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/java.hpp"
#include "runtime/javaCalls.hpp"
@ -405,6 +406,14 @@ static inline void atomic_copy64(const volatile void *src, volatile void *dst) {
extern "C" {
int SpinPause() {
if (UseZihintpause) {
// PAUSE is encoded as a FENCE instruction with pred=W, succ=0, fm=0, rd=x0, and rs1=x0.
// To do: __asm__ volatile("pause " : : : );
// Since we're currently not passing '-march=..._zihintpause' to the compiler,
// it will not recognize the "pause" instruction, hence the hard-coded instruction.
__asm__ volatile(".word 0x0100000f " : : : );
return 1;
}
return 0;
}