[Turbofan] Add ARM NEON instructions for implementing SIMD.

test/cctest/test-macro-assembler-arm.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 24 matching lines @@
 #include "src/arm/macro-assembler-arm.h"
 #include "src/arm/simulator-arm.h"
 
 
 using namespace v8::internal;
 
 typedef void* (*F)(int x, int y, int p2, int p3, int p4);
 
 #define __ masm->
 
+typedef Object* (*F3)(void* p0, int p1, int p2, int p3, int p4);
 typedef int (*F5)(void*, void*, void*, void*, void*);
 
 
 TEST(LoadAndStoreWithRepresentation) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
       Assembler::kMinimalBufferSize, &actual_size, true));
   CHECK(buffer);
   Isolate* isolate = CcTest::i_isolate();
@@ skipping 72 matching lines @@
   CodeDesc desc;
   masm->GetCode(&desc);
   Handle<Code> code = isolate->factory()->NewCode(
       desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
 
   // Call the function from C++.
   F5 f = FUNCTION_CAST<F5>(code->entry());
   CHECK(!CALL_GENERATED_CODE(isolate, f, 0, 0, 0, 0, 0));
 }
 
+TEST(ExtractLane) {
+  if (!CpuFeatures::IsSupported(NEON)) return;
+
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
+      Assembler::kMinimalBufferSize, &actual_size, true));
+  CHECK(buffer);
+  Isolate* isolate = CcTest::i_isolate();
+  HandleScope handles(isolate);
+  MacroAssembler assembler(isolate, buffer, static_cast<int>(actual_size),
+                           v8::internal::CodeObjectRequired::kYes);
+  MacroAssembler* masm = &assembler;  // Create a pointer for the __ macro.
+
+  typedef struct {
+    int32_t i32x4_low[4];
+    int32_t i32x4_high[4];
+    int32_t i16x8_low[8];
+    int32_t i16x8_high[8];
+    int32_t i8x16_low[16];
+    int32_t i8x16_high[16];
+    int32_t f32x4_low[4];
+    int32_t f32x4_high[4];
+  } T;
+  T t;
+
+  __ stm(db_w, sp, r4.bit() | r5.bit() | lr.bit());
+
+  for (int i = 0; i < 4; i++) {
+    __ mov(r4, Operand(i));
+    __ vdup(q1, r4, Neon32);
+    __ ExtractLane(r5, q1, NeonS32, i);
+    __ str(r5, MemOperand(r0, offsetof(T, i32x4_low) + 4 * i));
+    SwVfpRegister si = SwVfpRegister::from_code(i);
+    __ ExtractLane(si, q1, r4, i);
+    __ vstr(si, r0, offsetof(T, f32x4_low) + 4 * i);
+  }
+
+  for (int i = 0; i < 8; i++) {
+    __ mov(r4, Operand(i));
+    __ vdup(q1, r4, Neon16);
+    __ ExtractLane(r5, q1, NeonS16, i);
+    __ str(r5, MemOperand(r0, offsetof(T, i16x8_low) + 4 * i));
+  }
+
+  for (int i = 0; i < 16; i++) {
+    __ mov(r4, Operand(i));
+    __ vdup(q1, r4, Neon8);
+    __ ExtractLane(r5, q1, NeonS8, i);
+    __ str(r5, MemOperand(r0, offsetof(T, i8x16_low) + 4 * i));
+  }
+
+  if (CpuFeatures::IsSupported(VFP32DREGS)) {
+    for (int i = 0; i < 4; i++) {
+      __ mov(r4, Operand(-i));
+      __ vdup(q15, r4, Neon32);
+      __ ExtractLane(r5, q15, NeonS32, i);
+      __ str(r5, MemOperand(r0, offsetof(T, i32x4_high) + 4 * i));
+      SwVfpRegister si = SwVfpRegister::from_code(i);
+      __ ExtractLane(si, q15, r4, i);
+      __ vstr(si, r0, offsetof(T, f32x4_high) + 4 * i);
+    }
+
+    for (int i = 0; i < 8; i++) {
+      __ mov(r4, Operand(-i));
+      __ vdup(q15, r4, Neon16);
+      __ ExtractLane(r5, q15, NeonS16, i);
+      __ str(r5, MemOperand(r0, offsetof(T, i16x8_high) + 4 * i));
+    }
+
+    for (int i = 0; i < 16; i++) {
+      __ mov(r4, Operand(-i));
+      __ vdup(q15, r4, Neon8);
+      __ ExtractLane(r5, q15, NeonS8, i);
+      __ str(r5, MemOperand(r0, offsetof(T, i8x16_high) + 4 * i));
+    }
+  }
+
+  __ ldm(ia_w, sp, r4.bit() | r5.bit() | pc.bit());
+  __ bx(lr);

[Rodolph Perfetta (ARM), 2016/12/08 18:08:28]

nit: this is not necessary, the line above loaded lr directly in the pc.

[bbudge, 2016/12/10 21:33:05]

Done.

+
+  CodeDesc desc;
+  masm->GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef DEBUG
+  OFStream os(stdout);
+  code->Print(os);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  Object* dummy = CALL_GENERATED_CODE(isolate, f, &t, 0, 0, 0, 0);
+  USE(dummy);
+  for (int i = 0; i < 4; i++) {
+    CHECK_EQ(i, t.i32x4_low[i]);
+    CHECK_EQ(i, t.f32x4_low[i]);
+  }
+  for (int i = 0; i < 8; i++) {
+    CHECK_EQ(i, t.i16x8_low[i]);
+  }
+  for (int i = 0; i < 16; i++) {
+    CHECK_EQ(i, t.i8x16_low[i]);
+  }
+  if (CpuFeatures::IsSupported(VFP32DREGS)) {
+    for (int i = 0; i < 4; i++) {
+      CHECK_EQ(-i, t.i32x4_high[i]);
+      CHECK_EQ(-i, t.f32x4_high[i]);
+    }
+    for (int i = 0; i < 8; i++) {
+      CHECK_EQ(-i, t.i16x8_high[i]);
+    }
+    for (int i = 0; i < 16; i++) {
+      CHECK_EQ(-i, t.i8x16_high[i]);
+    }
+  }
+}
+
+TEST(ReplaceLane) {
+  if (!CpuFeatures::IsSupported(NEON)) return;
+
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
+      Assembler::kMinimalBufferSize, &actual_size, true));
+  CHECK(buffer);
+  Isolate* isolate = CcTest::i_isolate();
+  HandleScope handles(isolate);
+  MacroAssembler assembler(isolate, buffer, static_cast<int>(actual_size),
+                           v8::internal::CodeObjectRequired::kYes);
+  MacroAssembler* masm = &assembler;  // Create a pointer for the __ macro.
+
+  typedef struct {
+    int32_t i32x4_low[4];
+    int32_t i32x4_high[4];
+    int16_t i16x8_low[8];
+    int16_t i16x8_high[8];
+    int8_t i8x16_low[16];
+    int8_t i8x16_high[16];
+    int32_t f32x4_low[4];
+    int32_t f32x4_high[4];
+  } T;
+  T t;
+
+  __ stm(db_w, sp, r4.bit() | r5.bit() | r6.bit() | r7.bit() | lr.bit());
+
+  const Register kScratch = r5;
+
+  __ veor(q0, q0, q0);  // Zero
+  __ veor(q1, q1, q1);  // Zero
+  for (int i = 0; i < 4; i++) {
+    __ mov(r4, Operand(i));
+    __ ReplaceLane(q0, q0, r4, kScratch, NeonS32, i);
+    SwVfpRegister si = SwVfpRegister::from_code(i);
+    __ vmov(si, r4);
+    __ ReplaceLane(q1, q1, si, kScratch, i);
+  }
+  __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, i32x4_low))));
+  __ vst1(Neon8, NeonListOperand(q0), NeonMemOperand(r4));
+  __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, f32x4_low))));
+  __ vst1(Neon8, NeonListOperand(q1), NeonMemOperand(r4));
+
+  __ veor(q0, q0, q0);  // Zero
+  for (int i = 0; i < 8; i++) {
+    __ mov(r4, Operand(i));
+    __ ReplaceLane(q0, q0, r4, kScratch, NeonS16, i);
+  }
+  __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, i16x8_low))));
+  __ vst1(Neon8, NeonListOperand(q0), NeonMemOperand(r4));
+
+  __ veor(q0, q0, q0);  // Zero
+  for (int i = 0; i < 16; i++) {
+    __ mov(r4, Operand(i));
+    __ ReplaceLane(q0, q0, r4, kScratch, NeonS8, i);
+  }
+  __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, i8x16_low))));
+  __ vst1(Neon8, NeonListOperand(q0), NeonMemOperand(r4));
+
+  if (CpuFeatures::IsSupported(VFP32DREGS)) {
+    __ veor(q14, q14, q14);  // Zero
+    __ veor(q15, q15, q15);  // Zero
+    for (int i = 0; i < 4; i++) {
+      __ mov(r4, Operand(-i));
+      __ ReplaceLane(q14, q14, r4, kScratch, NeonS32, i);
+      SwVfpRegister si = SwVfpRegister::from_code(i);
+      __ vmov(si, r4);
+      __ ReplaceLane(q15, q15, si, kScratch, i);
+    }
+    __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, i32x4_high))));
+    __ vst1(Neon8, NeonListOperand(q14), NeonMemOperand(r4));
+    __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, f32x4_high))));
+    __ vst1(Neon8, NeonListOperand(q15), NeonMemOperand(r4));
+
+    __ veor(q14, q14, q14);  // Zero
+    for (int i = 0; i < 8; i++) {
+      __ mov(r4, Operand(-i));
+      __ ReplaceLane(q14, q14, r4, kScratch, NeonS16, i);
+    }
+    __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, i16x8_high))));
+    __ vst1(Neon8, NeonListOperand(q14), NeonMemOperand(r4));
+
+    __ veor(q14, q14, q14);  // Zero
+    for (int i = 0; i < 16; i++) {
+      __ mov(r4, Operand(-i));
+      __ ReplaceLane(q14, q14, r4, kScratch, NeonS8, i);
+    }
+    __ add(r4, r0, Operand(static_cast<int32_t>(offsetof(T, i8x16_high))));
+    __ vst1(Neon8, NeonListOperand(q14), NeonMemOperand(r4));
+  }
+
+  __ ldm(ia_w, sp, r4.bit() | r5.bit() | r6.bit() | r7.bit() | pc.bit());
+  __ bx(lr);

[bbudge, 2016/12/10 21:33:04]

And here.

+
+  CodeDesc desc;
+  masm->GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef DEBUG
+  OFStream os(stdout);
+  code->Print(os);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  Object* dummy = CALL_GENERATED_CODE(isolate, f, &t, 0, 0, 0, 0);
+  USE(dummy);
+  for (int i = 0; i < 4; i++) {
+    CHECK_EQ(i, t.i32x4_low[i]);
+    CHECK_EQ(i, t.f32x4_low[i]);
+  }
+  for (int i = 0; i < 8; i++) {
+    CHECK_EQ(i, t.i16x8_low[i]);
+  }
+  for (int i = 0; i < 16; i++) {
+    CHECK_EQ(i, t.i8x16_low[i]);
+  }
+  if (CpuFeatures::IsSupported(VFP32DREGS)) {
+    for (int i = 0; i < 4; i++) {
+      CHECK_EQ(-i, t.i32x4_high[i]);
+      CHECK_EQ(-i, t.f32x4_high[i]);
+    }
+    for (int i = 0; i < 8; i++) {
+      CHECK_EQ(-i, t.i16x8_high[i]);
+    }
+    for (int i = 0; i < 16; i++) {
+      CHECK_EQ(-i, t.i8x16_high[i]);
+    }
+  }
+}
+
 #undef __