[riscv64] Add macro to control disassemble rvv

Change-Id: Iad4b34b1c4a85800e8e1d6c01b686dd19e8116a6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3600532
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#80508}

src/codegen/riscv64/assembler-riscv64.cc

@@ -59,7 +59,7 @@ static unsigned CpuFeaturesImpliedByCompiler() {
 
 #if (defined CAN_USE_RVV_INSTRUCTIONS)
   answer |= 1u << RISCV_SIMD;
-#endif  // def CAN_USE_RVV_INSTRUCTIONS || USE_SIMULATOR
+#endif  // def CAN_USE_RVV_INSTRUCTIONS
   return answer;
 }
 
@@ -2913,6 +2913,7 @@ uint8_t vsew_switch(VSew vsew) {
 
 void Assembler::vl(VRegister vd, Register rs1, uint8_t lumop, VSew vsew,
                    MaskType mask) {
+  std::cout << "vl" << std::endl;
   uint8_t width = vsew_switch(vsew);
   GenInstrV(LOAD_FP, width, vd, rs1, lumop, mask, 0b00, 0, 0b000);
 }

src/execution/riscv64/simulator-riscv64.cc

@@ -88,6 +88,7 @@
 // PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
 // HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
 // MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+#ifdef CAN_USE_RVV_INSTRUCTIONS
 static inline bool is_aligned(const unsigned val, const unsigned pos) {
   return pos ? (val & (pos - 1)) == 0 : true;
 }
@@ -155,7 +156,6 @@ static inline bool is_overlapped_widen(const int astart, int asize,
 // PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
 // HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
 // MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
-#ifdef CAN_USE_RVV_INSTRUCTIONS
 template <uint64_t N>
 struct type_usew_t;
 template <>
@@ -4635,10 +4635,10 @@ void Simulator::DecodeRVIType() {
       if (!DecodeRvvVL()) {
         UNSUPPORTED();
       }
+      break;
 #else
       UNSUPPORTED();
 #endif
-      break;
     }
   }
 }
@@ -4676,10 +4676,10 @@ void Simulator::DecodeRVSType() {
       if (!DecodeRvvVS()) {
         UNSUPPORTED();
       }
+      break;
 #else
       UNSUPPORTED();
 #endif
-      break;
   }
 }