PPC: pass a gp scratch register to SwapSimd128

Change-Id: I5da6270dc5c3d9b561eeb6c6dd3a938e705039c4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3843088Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#82604}

src/codegen/ppc/macro-assembler-ppc.cc

@@ -3986,21 +3986,21 @@ void TurboAssembler::SwapSimd128(Simd128Register src, Simd128Register dst,
 }
 
 void TurboAssembler::SwapSimd128(Simd128Register src, MemOperand dst,
-                                 Simd128Register scratch) {
-  DCHECK(src != scratch);
-  LoadSimd128(scratch, dst, ip);
+                                 Simd128Register scratch1, Register scratch2) {
+  DCHECK(src != scratch1);
+  LoadSimd128(scratch1, dst, scratch2);
   StoreSimd128(src, dst, ip);
-  vor(src, scratch, scratch);
+  vor(src, scratch1, scratch1);
 }
 
 void TurboAssembler::SwapSimd128(MemOperand src, MemOperand dst,
                                  Simd128Register scratch1,
-                                 Simd128Register scratch2) {
-  LoadSimd128(scratch1, src, ip);
-  LoadSimd128(scratch2, dst, ip);
+                                 Simd128Register scratch2, Register scratch3) {
+  LoadSimd128(scratch1, src, scratch3);
+  LoadSimd128(scratch2, dst, scratch3);
 
-  StoreSimd128(scratch1, dst, ip);
-  StoreSimd128(scratch2, src, ip);
+  StoreSimd128(scratch1, dst, scratch3);
+  StoreSimd128(scratch2, src, scratch3);
 }
 
 void TurboAssembler::ByteReverseU16(Register dst, Register val,

src/codegen/ppc/macro-assembler-ppc.h

@@ -615,9 +615,9 @@ class V8_EXPORT_PRIVATE TurboAssembler : public TurboAssemblerBase {
   void SwapSimd128(Simd128Register src, Simd128Register dst,
                    Simd128Register scratch);
   void SwapSimd128(Simd128Register src, MemOperand dst,
-                   Simd128Register scratch);
+                   Simd128Register scratch1, Register scratch2);
   void SwapSimd128(MemOperand src, MemOperand dst, Simd128Register scratch1,
-                   Simd128Register scratch2);
+                   Simd128Register scratch2, Register scratch3);
 
   void ByteReverseU16(Register dst, Register val, Register scratch);
   void ByteReverseU32(Register dst, Register val, Register scratch);

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

@@ -4518,12 +4518,13 @@ void CodeGenerator::AssembleSwap(InstructionOperand* source,
       __ SwapSimd128(src, g.ToSimd128Register(destination), kScratchSimd128Reg);
     } else {
       DCHECK(destination->IsSimd128StackSlot());
-      __ SwapSimd128(src, g.ToMemOperand(destination), kScratchSimd128Reg);
+      __ SwapSimd128(src, g.ToMemOperand(destination), kScratchSimd128Reg,
+                     kScratchReg);
     }
   } else if (source->IsSimd128StackSlot()) {
     DCHECK(destination->IsSimd128StackSlot());
     __ SwapSimd128(g.ToMemOperand(source), g.ToMemOperand(destination),
-                   kScratchSimd128Reg, kScratchSimd128Reg2);
+                   kScratchSimd128Reg, kScratchSimd128Reg2, kScratchReg);
 
   } else {
     UNREACHABLE();