MIPS: disabling rsqrt and recip for mips32r1

Disabling rsqrt and recip for mips32r1 in assembler, disassembler and simulator

Review URL: https://codereview.chromium.org/1221663006

Cr-Commit-Position: refs/heads/master@{#29425}

src/mips/assembler-mips.cc

@@ -2350,21 +2350,25 @@ void Assembler::sqrt_d(FPURegister fd, FPURegister fs) {
 
 
 void Assembler::rsqrt_s(FPURegister fd, FPURegister fs) {
+  DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
   GenInstrRegister(COP1, S, f0, fs, fd, RSQRT_S);
 }
 
 
 void Assembler::rsqrt_d(FPURegister fd, FPURegister fs) {
+  DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
   GenInstrRegister(COP1, D, f0, fs, fd, RSQRT_D);
 }
 
 
 void Assembler::recip_d(FPURegister fd, FPURegister fs) {
+  DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
   GenInstrRegister(COP1, D, f0, fs, fd, RECIP_D);
 }
 
 
 void Assembler::recip_s(FPURegister fd, FPURegister fs) {
+  DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
   GenInstrRegister(COP1, S, f0, fs, fd, RECIP_S);
 }
 

src/mips/simulator-mips.cc

@@ -2711,11 +2711,13 @@ void Simulator::DecodeTypeRegisterDRsType(Instruction* instr,
       set_fpu_register_double(fd_reg, fast_sqrt(fs));
       break;
     case RSQRT_D: {
+      DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
       double result = 1.0 / fast_sqrt(fs);
       set_fpu_register_double(fd_reg, result);
       break;
     }
     case RECIP_D: {
+      DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
       double result = 1.0 / fs;
       set_fpu_register_double(fd_reg, result);
       break;
@@ -3117,11 +3119,13 @@ void Simulator::DecodeTypeRegisterSRsType(Instruction* instr,
       set_fpu_register_float(fd_reg, fast_sqrt(fs));
       break;
     case RSQRT_S: {
+      DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
       float result = 1.0 / fast_sqrt(fs);
       set_fpu_register_float(fd_reg, result);
       break;
     }
     case RECIP_S: {
+      DCHECK(IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6));
       float result = 1.0 / fs;
       set_fpu_register_float(fd_reg, result);
       break;

test/cctest/test-assembler-mips.cc

@@ -2511,16 +2511,22 @@ TEST(sqrt_rsqrt_recip) {
   __ ldc1(f8, MemOperand(a0, offsetof(TestFloat, c)) );
   __ sqrt_s(f6, f2);
   __ sqrt_d(f12, f8);
+
+  if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) {
     __ rsqrt_d(f14, f8);
     __ rsqrt_s(f16, f2);
     __ recip_d(f18, f8);
     __ recip_s(f20, f2);
+  }
   __ swc1(f6, MemOperand(a0, offsetof(TestFloat, resultS)) );
   __ sdc1(f12, MemOperand(a0, offsetof(TestFloat, resultD)) );
+
+  if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) {
     __ swc1(f16, MemOperand(a0, offsetof(TestFloat, resultS1)) );
     __ sdc1(f14, MemOperand(a0, offsetof(TestFloat, resultD1)) );
     __ swc1(f20, MemOperand(a0, offsetof(TestFloat, resultS2)) );
     __ sdc1(f18, MemOperand(a0, offsetof(TestFloat, resultD2)) );
+  }
   __ jr(ra);
   __ nop();
 
@@ -2541,6 +2547,7 @@ TEST(sqrt_rsqrt_recip) {
     CHECK_EQ(test.resultS, outputs_S[i]);
     CHECK_EQ(test.resultD, outputs_D[i]);
 
+    if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) {
       if (i != 0) {
         f1 = test.resultS1 - 1.0F/outputs_S[i];
         f1 = (f1 < 0) ? f1 : -f1;
@@ -2561,6 +2568,7 @@ TEST(sqrt_rsqrt_recip) {
         CHECK_EQ(test.resultD2, 1.0L/inputs_D[i]);
       }
     }
+  }
 }
 
 

test/cctest/test-disasm-mips.cc

@@ -666,11 +666,13 @@ TEST(Type1) {
   COMPARE(mul_s(f8, f6, f4), "46043202       mul.s   f8, f6, f4");
   COMPARE(mul_d(f8, f6, f4), "46243202       mul.d   f8, f6, f4");
 
+  if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) {
     COMPARE(rsqrt_s(f8, f6), "46003216       rsqrt.s  f8, f6");
     COMPARE(rsqrt_d(f8, f6), "46203216       rsqrt.d  f8, f6");
 
     COMPARE(recip_s(f8, f6), "46003215       recip.s  f8, f6");
     COMPARE(recip_d(f8, f6), "46203215       recip.d  f8, f6");
+  }
 
   COMPARE(mov_s(f6, f4), "46002186       mov.s   f6, f4");
   COMPARE(mov_d(f6, f4), "46202186       mov.d   f6, f4");