[liftoff][loong64][mips64] Implement Atomic ops and ConvertSat ops

Change-Id: I4378e4f99c6b034f7b29782218896d5485178109
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3514656
Auto-Submit: Yu Liu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#79452}

src/compiler/backend/loong64/code-generator-loong64.cc

@@ -443,9 +443,9 @@ FPUCondition FlagsConditionToConditionCmpFPU(bool* predicate,
     __ load_linked(i.TempRegister(2), MemOperand(i.TempRegister(0), 0));       \
     __ ExtractBits(i.OutputRegister(0), i.TempRegister(2), i.TempRegister(1),  \
                    size, sign_extend);                                         \
-    __ ExtractBits(i.InputRegister(2), i.InputRegister(2), zero_reg, size,     \
+    __ ExtractBits(i.TempRegister(2), i.InputRegister(2), zero_reg, size,      \
                    sign_extend);                                               \
-    __ BranchShort(&exit, ne, i.InputRegister(2),                              \
+    __ BranchShort(&exit, ne, i.TempRegister(2),                               \
                    Operand(i.OutputRegister(0)));                              \
     __ InsertBits(i.TempRegister(2), i.InputRegister(3), i.TempRegister(1),    \
                   size);                                                       \

src/compiler/backend/mips64/code-generator-mips64.cc

@@ -457,9 +457,9 @@ FPUCondition FlagsConditionToConditionCmpFPU(bool* predicate,
     __ load_linked(i.TempRegister(2), MemOperand(i.TempRegister(0), 0));       \
     __ ExtractBits(i.OutputRegister(0), i.TempRegister(2), i.TempRegister(1),  \
                    size, sign_extend);                                         \
-    __ ExtractBits(i.InputRegister(2), i.InputRegister(2), zero_reg, size,     \
+    __ ExtractBits(i.TempRegister(2), i.InputRegister(2), zero_reg, size,      \
                    sign_extend);                                               \
-    __ BranchShort(&exit, ne, i.InputRegister(2),                              \
+    __ BranchShort(&exit, ne, i.TempRegister(2),                               \
                    Operand(i.OutputRegister(0)));                              \
     __ InsertBits(i.TempRegister(2), i.InputRegister(3), i.TempRegister(1),    \
                   size);                                                       \

src/execution/loong64/simulator-loong64.cc

@@ -4267,12 +4267,28 @@ void Simulator::DecodeTypeOp17() {
     case FSCALEB_D:
       printf("Sim UNIMPLEMENTED: FSCALEB_D\n");
       UNIMPLEMENTED();
-    case FCOPYSIGN_S:
-      printf("Sim UNIMPLEMENTED: FCOPYSIGN_S\n");
-      UNIMPLEMENTED();
-    case FCOPYSIGN_D:
-      printf("Sim UNIMPLEMENTED: FCOPYSIGN_D\n");
-      UNIMPLEMENTED();
+    case FCOPYSIGN_S: {
+      printf_instr("FCOPYSIGN_S\t %s: %016f, %s, %016f, %s, %016f\n",
+                   FPURegisters::Name(fd_reg()), fd_float(),
+                   FPURegisters::Name(fj_reg()), fj_float(),
+                   FPURegisters::Name(fk_reg()), fk_float());
+      SetFPUFloatResult(fd_reg(), FPUCanonalizeOperation(
+                                      [](float lhs, float rhs) {
+                                        return std::copysign(lhs, rhs);
+                                      },
+                                      fj_float(), fk_float()));
+    } break;
+    case FCOPYSIGN_D: {
+      printf_instr("FCOPYSIGN_d\t %s: %016f, %s, %016f, %s, %016f\n",
+                   FPURegisters::Name(fd_reg()), fd_double(),
+                   FPURegisters::Name(fj_reg()), fj_double(),
+                   FPURegisters::Name(fk_reg()), fk_double());
+      SetFPUDoubleResult(fd_reg(), FPUCanonalizeOperation(
+                                       [](double lhs, double rhs) {
+                                         return std::copysign(lhs, rhs);
+                                       },
+                                       fj_double(), fk_double()));
+    } break;
     default:
       UNREACHABLE();
   }