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Unified Diff: runtime/vm/disassembler_dbc.cc

Issue 1858283002: Initial SIMDBC interpreter. (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: Created 4 years, 8 months ago
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Index: runtime/vm/disassembler_dbc.cc
diff --git a/runtime/vm/disassembler_dbc.cc b/runtime/vm/disassembler_dbc.cc
new file mode 100644
index 0000000000000000000000000000000000000000..85d734dfd3bd817234cc84f51c34b42e2748af24
--- /dev/null
+++ b/runtime/vm/disassembler_dbc.cc
@@ -0,0 +1,233 @@
+// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "vm/disassembler.h"
+
+#include "vm/globals.h" // Needed here to get TARGET_ARCH_DBC.
+#if defined(TARGET_ARCH_DBC)
+
+#include "platform/assert.h"
+#include "vm/constants_dbc.h"
+#include "vm/cpu.h"
+
+namespace dart {
+
+static const char* kOpcodeNames[] = {
+#define BYTECODE_NAME(name, encoding, op1, op2, op3) #name,
+ BYTECODES_LIST(BYTECODE_NAME)
+#undef BYTECODE_NAME
+};
+
+static const size_t kOpcodeCount =
+ sizeof(kOpcodeNames) / sizeof(kOpcodeNames[0]);
+
+typedef void (*BytecodeFormatter)(char* buffer,
+ intptr_t size,
+ uword pc,
+ uint32_t bc);
+typedef void (*Fmt)(char** buf, intptr_t* size, uword pc, int32_t value);
+
+
+template <typename ValueType>
+void FormatOperand(char** buf,
+ intptr_t* size,
+ const char* fmt,
+ ValueType value) {
+ intptr_t written = OS::SNPrint(*buf, *size, fmt, value);
+ if (written < *size) {
+ *buf += written;
+ *size += written;
+ } else {
+ *size = -1;
+ }
+}
+
+
+static void Fmt___(char** buf, intptr_t* size, uword pc, int32_t value) {}
+
+
+static void Fmttgt(char** buf, intptr_t* size, uword pc, int32_t value) {
+ FormatOperand(buf, size, "-> %" Px, pc + (value << 2));
+}
+
+
+static void Fmtlit(char** buf, intptr_t* size, uword pc, int32_t value) {
+ FormatOperand(buf, size, "k%d", value);
+}
+
+
+static void Fmtreg(char** buf, intptr_t* size, uword pc, int32_t value) {
+ FormatOperand(buf, size, "r%d", value);
+}
+
+
+static void Fmtxeg(char** buf, intptr_t* size, uword pc, int32_t value) {
+ FormatOperand(buf, size, "R(%d)", value);
+}
+
+
+static void Fmtnum(char** buf, intptr_t* size, uword pc, int32_t value) {
+ FormatOperand(buf, size, "#%d", value);
+}
+
+
+static void Apply(char** buf,
+ intptr_t* size,
+ uword pc,
+ Fmt fmt,
+ int32_t value,
+ const char* suffix) {
+ if (*size <= 0) {
+ return;
+ }
+
+ fmt(buf, size, pc, value);
+ if (*size > 0) {
+ FormatOperand(buf, size, "%s", suffix);
+ }
+}
+
+
+static void Format0(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {}
+
+
+static void FormatT(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {
+ const int32_t x = static_cast<int32_t>(op) >> 8;
+ Apply(&buf, &size, pc, op1, x, "");
+}
+
+
+static void FormatA(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {
+ const int32_t a = (op & 0xFF00) >> 8;
+ Apply(&buf, &size, pc, op1, a, "");
+}
+
+
+static void FormatA_D(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {
+ const int32_t a = (op & 0xFF00) >> 8;
+ const int32_t bc = op >> 16;
+ Apply(&buf, &size, pc, op1, a, ", ");
+ Apply(&buf, &size, pc, op2, bc, "");
+}
+
+
+static void FormatA_X(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {
+ const int32_t a = (op & 0xFF00) >> 8;
+ const int32_t bc = static_cast<int32_t>(op) >> 16;
+ Apply(&buf, &size, pc, op1, a, ", ");
+ Apply(&buf, &size, pc, op2, bc, "");
+}
+
+
+static void FormatX(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {
+ const int32_t bc = static_cast<int32_t>(op) >> 16;
+ Apply(&buf, &size, pc, op1, bc, "");
+}
+
+
+static void FormatD(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {
+ const int32_t bc = op >> 16;
+ Apply(&buf, &size, pc, op1, bc, "");
+}
+
+
+static void FormatA_B_C(char* buf,
+ intptr_t size,
+ uword pc,
+ uint32_t op,
+ Fmt op1,
+ Fmt op2,
+ Fmt op3) {
+ const int32_t a = (op >> 8) & 0xFF;
+ const int32_t b = (op >> 16) & 0xFF;
+ const int32_t c = (op >> 24) & 0xFF;
+ Apply(&buf, &size, pc, op1, a, ", ");
+ Apply(&buf, &size, pc, op2, b, ", ");
+ Apply(&buf, &size, pc, op3, c, "");
+}
+
+
+#define BYTECODE_FORMATTER(name, encoding, op1, op2, op3) \
+ static void Format##name(char* buf, intptr_t size, uword pc, uint32_t op) { \
+ Format##encoding(buf, size, pc, op, Fmt##op1, Fmt##op2, Fmt##op3); \
+ }
+BYTECODES_LIST(BYTECODE_FORMATTER)
+#undef BYTECODE_FORMATTER
+
+
+static const BytecodeFormatter kFormatters[] = {
+#define BYTECODE_FORMATTER(name, encoding, op1, op2, op3) &Format##name,
+ BYTECODES_LIST(BYTECODE_FORMATTER)
+#undef BYTECODE_FORMATTER
+};
+
+
+void Disassembler::DecodeInstruction(char* hex_buffer,
+ intptr_t hex_size,
+ char* human_buffer,
+ intptr_t human_size,
+ int* out_instr_size,
+ uword pc) {
+ const uint32_t instr = *reinterpret_cast<uint32_t*>(pc);
+ const uint8_t opcode = instr & 0xFF;
+ ASSERT(opcode < kOpcodeCount);
+ size_t name_size =
+ OS::SNPrint(human_buffer, human_size, "%-10s\t", kOpcodeNames[opcode]);
+
+ human_buffer += name_size;
+ human_size -= name_size;
+ kFormatters[opcode](human_buffer, human_size, pc, instr);
+
+ OS::SNPrint(hex_buffer, hex_size, "%08x", instr);
+ if (out_instr_size) {
+ *out_instr_size = sizeof(uint32_t);
+ }
+}
+
+
+} // namespace dart
+
+#endif // defined TARGET_ARCH_DBC
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