2237       sve_and(vtmp, T, min_jlong);
2238       sve_orr(vtmp, T, jlong_cast(1.0));
2239       break;
2240     default:
2241       assert(false, "unsupported");
2242       ShouldNotReachHere();
2243     }
2244     sve_sel(dst, T, pgtmp, vtmp, src); // Select either from src or vtmp based on the predicate register pgtmp
2245                                        // Result in dst
2246 }
2247 
2248 bool C2_MacroAssembler::in_scratch_emit_size() {
2249   if (ciEnv::current()->task() != nullptr) {
2250     PhaseOutput* phase_output = Compile::current()->output();
2251     if (phase_output != nullptr && phase_output->in_scratch_emit_size()) {
2252       return true;
2253     }
2254   }
2255   return MacroAssembler::in_scratch_emit_size();
2256 }

2237       sve_and(vtmp, T, min_jlong);
2238       sve_orr(vtmp, T, jlong_cast(1.0));
2239       break;
2240     default:
2241       assert(false, "unsupported");
2242       ShouldNotReachHere();
2243     }
2244     sve_sel(dst, T, pgtmp, vtmp, src); // Select either from src or vtmp based on the predicate register pgtmp
2245                                        // Result in dst
2246 }
2247 
2248 bool C2_MacroAssembler::in_scratch_emit_size() {
2249   if (ciEnv::current()->task() != nullptr) {
2250     PhaseOutput* phase_output = Compile::current()->output();
2251     if (phase_output != nullptr && phase_output->in_scratch_emit_size()) {
2252       return true;
2253     }
2254   }
2255   return MacroAssembler::in_scratch_emit_size();
2256 }
2257 
2258 void C2_MacroAssembler::load_nklass_compact(Register dst, Register obj, Register index, int scale, int disp) {
2259   C2LoadNKlassStub* stub = new (Compile::current()->comp_arena()) C2LoadNKlassStub(dst);
2260   Compile::current()->output()->add_stub(stub);
2261 
2262   // Note: Don't clobber obj anywhere in that method!
2263 
2264   // The incoming address is pointing into obj-start + klass_offset_in_bytes. We need to extract
2265   // obj-start, so that we can load from the object's mark-word instead. Usually the address
2266   // comes as obj-start in obj and klass_offset_in_bytes in disp. However, sometimes C2
2267   // emits code that pre-computes obj-start + klass_offset_in_bytes into a register, and
2268   // then passes that register as obj and 0 in disp. The following code extracts the base
2269   // and offset to load the mark-word.
2270   int offset = oopDesc::mark_offset_in_bytes() + disp - oopDesc::klass_offset_in_bytes();
2271   if (index == noreg) {
2272     ldr(dst, Address(obj, offset));
2273   } else {
2274     lea(dst, Address(obj, index, Address::lsl(scale)));
2275     ldr(dst, Address(dst, offset));
2276   }
2277   // NOTE: We can't use tbnz here, because the target is sometimes too far away
2278   // and cannot be encoded.
2279   tst(dst, markWord::monitor_value);
2280   br(Assembler::NE, stub->entry());
2281   bind(stub->continuation());
2282   lsr(dst, dst, markWord::klass_shift);
2283 }