MIPS: Fix testcases r6_beqzc and mov.

Remove incorrect usage of callee-saved FPU regs (f20 and above).
Also remove unnecessary push/pop which were occasionally unpaired,
and caused crash.

TEST=cctest/test-assembler-mips[64]
BUG=

Review URL: https://codereview.chromium.org/1338713004

Cr-Commit-Position: refs/heads/master@{#30729}

src/mips/assembler-mips.cc

@@ -2322,12 +2322,12 @@ void Assembler::abs_d(FPURegister fd, FPURegister fs) {
 
 
 void Assembler::mov_d(FPURegister fd, FPURegister fs) {
-  GenInstrRegister(COP1, D, f0, fs, fd, MOV_S);
+  GenInstrRegister(COP1, D, f0, fs, fd, MOV_D);
 }
 
 
 void Assembler::mov_s(FPURegister fd, FPURegister fs) {
-  GenInstrRegister(COP1, S, f0, fs, fd, MOV_D);
+  GenInstrRegister(COP1, S, f0, fs, fd, MOV_S);
 }
 
 

src/mips64/assembler-mips64.cc

@@ -2634,7 +2634,7 @@ void Assembler::mov_d(FPURegister fd, FPURegister fs) {
 
 
 void Assembler::mov_s(FPURegister fd, FPURegister fs) {
-  GenInstrRegister(COP1, S, f0, fs, fd, MOV_D);
+  GenInstrRegister(COP1, S, f0, fs, fd, MOV_S);
 }
 
 

test/cctest/test-assembler-mips.cc

@@ -1153,17 +1153,17 @@ TEST(MIPS13) {
   MacroAssembler assm(isolate, NULL, 0);
 
   __ sw(t0, MemOperand(a0, offsetof(T, cvt_small_in)));
-  __ Cvt_d_uw(f10, t0, f22);
+  __ Cvt_d_uw(f10, t0, f4);
   __ sdc1(f10, MemOperand(a0, offsetof(T, cvt_small_out)));
 
-  __ Trunc_uw_d(f10, f10, f22);
+  __ Trunc_uw_d(f10, f10, f4);
   __ swc1(f10, MemOperand(a0, offsetof(T, trunc_small_out)));
 
   __ sw(t0, MemOperand(a0, offsetof(T, cvt_big_in)));
-  __ Cvt_d_uw(f8, t0, f22);
+  __ Cvt_d_uw(f8, t0, f4);
   __ sdc1(f8, MemOperand(a0, offsetof(T, cvt_big_out)));
 
-  __ Trunc_uw_d(f8, f8, f22);
+  __ Trunc_uw_d(f8, f8, f4);
   __ swc1(f8, MemOperand(a0, offsetof(T, trunc_big_out)));
 
   __ jr(ra);
@@ -2509,7 +2509,7 @@ TEST(sqrt_rsqrt_recip) {
     __ rsqrt_d(f14, f8);
     __ rsqrt_s(f16, f2);
     __ recip_d(f18, f8);
-    __ recip_s(f20, f2);
+    __ recip_s(f4, f2);
   }
   __ swc1(f6, MemOperand(a0, offsetof(TestFloat, resultS)) );
   __ sdc1(f12, MemOperand(a0, offsetof(TestFloat, resultD)) );
@@ -2517,7 +2517,7 @@ TEST(sqrt_rsqrt_recip) {
   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)) );
+    __ swc1(f4, MemOperand(a0, offsetof(TestFloat, resultS2)) );
     __ sdc1(f18, MemOperand(a0, offsetof(TestFloat, resultD2)) );
   }
   __ jr(ra);
@@ -2706,12 +2706,13 @@ TEST(mov) {
     5.3, -5.3, 5.3, -2.9
   };
 
-  __ ldc1(f2, MemOperand(a0, offsetof(TestFloat, a)) );
+  __ ldc1(f4, MemOperand(a0, offsetof(TestFloat, a)) );
   __ lwc1(f6, MemOperand(a0, offsetof(TestFloat, c)) );
-  __ mov_s(f18, f6);
-  __ mov_d(f20, f2);
-  __ swc1(f18, MemOperand(a0, offsetof(TestFloat, d)) );
-  __ sdc1(f20, MemOperand(a0, offsetof(TestFloat, b)) );
+  __ mov_s(f8, f6);
+  __ mov_d(f10, f4);
+  __ swc1(f8, MemOperand(a0, offsetof(TestFloat, d)) );
+  __ sdc1(f10, MemOperand(a0, offsetof(TestFloat, b)) );
+
   __ jr(ra);
   __ nop();
 
@@ -4678,7 +4679,6 @@ uint64_t run_beqzc(int32_t value, int32_t offset) {
   Label stop_execution;
   __ li(v0, 0);
   __ li(t1, 0x66);
-  __ push(ra);
 
   __ addiu(v0, v0, 0x1);        // <-- offset = -32
   __ addiu(v0, v0, 0x2);
@@ -4698,7 +4698,6 @@ uint64_t run_beqzc(int32_t value, int32_t offset) {
   __ nop();
 
   __ bind(&stop_execution);
-  __ pop(ra);
   __ jr(ra);
   __ nop();
 

test/cctest/test-assembler-mips64.cc

@@ -1156,17 +1156,17 @@ TEST(MIPS13) {
   MacroAssembler assm(isolate, NULL, 0);
 
   __ sw(a4, MemOperand(a0, offsetof(T, cvt_small_in)));
-  __ Cvt_d_uw(f10, a4, f22);
+  __ Cvt_d_uw(f10, a4, f4);
   __ sdc1(f10, MemOperand(a0, offsetof(T, cvt_small_out)));
 
-  __ Trunc_uw_d(f10, f10, f22);
+  __ Trunc_uw_d(f10, f10, f4);
   __ swc1(f10, MemOperand(a0, offsetof(T, trunc_small_out)));
 
   __ sw(a4, MemOperand(a0, offsetof(T, cvt_big_in)));
-  __ Cvt_d_uw(f8, a4, f22);
+  __ Cvt_d_uw(f8, a4, f4);
   __ sdc1(f8, MemOperand(a0, offsetof(T, cvt_big_out)));
 
-  __ Trunc_uw_d(f8, f8, f22);
+  __ Trunc_uw_d(f8, f8, f4);
   __ swc1(f8, MemOperand(a0, offsetof(T, trunc_big_out)));
 
   __ jr(ra);
@@ -2610,12 +2610,12 @@ TEST(sqrt_rsqrt_recip) {
   __ rsqrt_d(f14, f8);
   __ rsqrt_s(f16, f2);
   __ recip_d(f18, f8);
-  __ recip_s(f20, f2);
+  __ recip_s(f4, f2);
   __ swc1(f6, MemOperand(a0, offsetof(TestFloat, resultS)) );
   __ sdc1(f12, MemOperand(a0, offsetof(TestFloat, resultD)) );
   __ swc1(f16, MemOperand(a0, offsetof(TestFloat, resultS1)) );
   __ sdc1(f14, MemOperand(a0, offsetof(TestFloat, resultD1)) );
-  __ swc1(f20, MemOperand(a0, offsetof(TestFloat, resultS2)) );
+  __ swc1(f4, MemOperand(a0, offsetof(TestFloat, resultS2)) );
   __ sdc1(f18, MemOperand(a0, offsetof(TestFloat, resultD2)) );
   __ jr(ra);
   __ nop();
@@ -2802,12 +2802,12 @@ TEST(mov) {
     5.3, -5.3, 5.3, -2.9
   };
 
-  __ ldc1(f2, MemOperand(a0, offsetof(TestFloat, a)) );
+  __ ldc1(f4, MemOperand(a0, offsetof(TestFloat, a)) );
   __ lwc1(f6, MemOperand(a0, offsetof(TestFloat, c)) );
-  __ mov_s(f18, f6);
-  __ mov_d(f20, f2);
-  __ swc1(f18, MemOperand(a0, offsetof(TestFloat, d)) );
-  __ sdc1(f20, MemOperand(a0, offsetof(TestFloat, b)) );
+  __ mov_s(f8, f6);
+  __ mov_d(f10, f4);
+  __ swc1(f8, MemOperand(a0, offsetof(TestFloat, d)) );
+  __ sdc1(f10, MemOperand(a0, offsetof(TestFloat, b)) );
   __ jr(ra);
   __ nop();