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8298075: RISC-V: Implement post-call NOPs

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Reviewed-by: fyang, luhenry
This commit is contained in:
Xiaolin Zheng 2022-12-08 02:19:35 +00:00 • committed by Fei Yang
parent 3aa4070d4c
commit 74f346b33f
6 changed files with 37 additions and 7 deletions
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5
src/hotspot/cpu/riscv/macroAssembler_riscv.cpp
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@ -210,6 +210,7 @@ void MacroAssembler::post_call_nop() {
}
relocate(post_call_nop_Relocation::spec(), [&] {
nop();
li32(zr, 0);
});
}
@ -1383,7 +1384,7 @@ static int patch_imm_in_li64(address branch, address target) {
return LI64_INSTRUCTIONS_NUM * NativeInstruction::instruction_size;
}
static int patch_imm_in_li32(address branch, int32_t target) {
int MacroAssembler::patch_imm_in_li32(address branch, int32_t target) {
const int LI32_INSTRUCTIONS_NUM = 2; // lui + addiw
int64_t upper = (intptr_t)target;
int32_t lower = (((int32_t)target) << 20) >> 20;
@ -1447,7 +1448,7 @@ static address get_target_of_li64(address insn_addr) {
return (address)target_address;
}
static address get_target_of_li32(address insn_addr) {
address MacroAssembler::get_target_of_li32(address insn_addr) {
assert_cond(insn_addr != NULL);
intptr_t target_address = (((int64_t)Assembler::sextract(((unsigned*)insn_addr)[0], 31, 12)) & 0xfffff) << 12; // Lui.
target_address += ((int64_t)Assembler::sextract(((unsigned*)insn_addr)[1], 31, 20)); // Addiw.