[wasm][liftoff][mips] Detect NaNs for fuzzing

Port: e699762e

Bug: v8:11856
Change-Id: Ib832dfcee864b21b4e56498fca54e9ae01c44ae7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2983711
Auto-Submit: Liu yu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#75350}

src/wasm/baseline/mips/liftoff-assembler-mips.h

@@ -3004,6 +3004,21 @@ void LiftoffAssembler::DeallocateStackSlot(uint32_t size) {
 
 void LiftoffAssembler::MaybeOSR() {}
 
+void LiftoffAssembler::emit_set_if_nan(Register dst, FPURegister src,
+                                       ValueKind kind) {
+  UseScratchRegisterScope temps(this);
+  Register scratch = temps.Acquire();
+  li(scratch, 1);
+  if (kind == kF32) {
+    CompareIsNanF32(src, src);
+  } else {
+    DCHECK_EQ(kind, kF64);
+    CompareIsNanF64(src, src);
+  }
+  LoadZeroIfNotFPUCondition(scratch);
+  Sw(scratch, MemOperand(dst));
+}
+
 void LiftoffStackSlots::Construct(int param_slots) {
   DCHECK_LT(0, slots_.size());
   SortInPushOrder();

src/wasm/baseline/mips64/liftoff-assembler-mips64.h

@@ -3172,6 +3172,21 @@ void LiftoffAssembler::DeallocateStackSlot(uint32_t size) {
 
 void LiftoffAssembler::MaybeOSR() {}
 
+void LiftoffAssembler::emit_set_if_nan(Register dst, FPURegister src,
+                                       ValueKind kind) {
+  UseScratchRegisterScope temps(this);
+  Register scratch = temps.Acquire();
+  li(scratch, 1);
+  if (kind == kF32) {
+    CompareIsNanF32(src, src);
+  } else {
+    DCHECK_EQ(kind, kF64);
+    CompareIsNanF64(src, src);
+  }
+  LoadZeroIfNotFPUCondition(scratch);
+  Sd(scratch, MemOperand(dst));
+}
+
 void LiftoffStackSlots::Construct(int param_slots) {
   DCHECK_LT(0, slots_.size());
   SortInPushOrder();