Experimental implementation: Exposing SIMD instructions into JavaScript

src/x64/disasm-x64.cc

Index: src/x64/disasm-x64.cc
diff --git a/src/x64/disasm-x64.cc b/src/x64/disasm-x64.cc
index 76b541c01002b0f8ec1cb53f3220b8914d7ae0f1..dfc04b1c9885e088c2e62f0d763003c885a492fc 100644
--- a/src/x64/disasm-x64.cc
+++ b/src/x64/disasm-x64.cc
@@ -1038,6 +1038,22 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
         current += PrintRightOperand(current);
         AppendToBuffer(",%s,%d", NameOfXMMRegister(regop), (*current) & 3);
         current += 1;
+      } else if (third_byte == 0x21) {
+        get_modrm(*current, &mod, &regop, &rm);
+        // insertps xmm, xmm, imm8
+        AppendToBuffer("insertps %s,%s,%d",
+                       NameOfXMMRegister(regop),
+                       NameOfXMMRegister(rm),
+                       (*(current + 1)) & 3);
+        current += 2;
+      } else if (third_byte == 0x22) {
+        get_modrm(*current, &mod, &regop, &rm);
+        // pinsrd xmm, reg32, imm8
+        AppendToBuffer("pinsrd %s,%s,%d",
+                       NameOfXMMRegister(regop),
+                       NameOfCPURegister(rm),
+                       (*(current + 1)) & 3);
+        current += 2;
       } else if (third_byte == 0x0b) {
         get_modrm(*current, &mod, &regop, &rm);
          // roundsd xmm, xmm/m64, imm8
@@ -1048,6 +1064,16 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
       } else {
         UnimplementedInstruction();
       }
+    } else if (opcode == 0x38) {
+      byte third_byte = *current;
+      current = data + 3;
+      if (third_byte == 0x40) {
+        get_modrm(*current, &mod, &regop, &rm);
+        AppendToBuffer("pmulld %s, ", NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
+      } else {
+        UnimplementedInstruction();
+      }
     } else {
       get_modrm(*current, &mod, &regop, &rm);
       if (opcode == 0x1f) {
@@ -1077,6 +1103,24 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
         AppendToBuffer("movdqa %s,",
                        NameOfXMMRegister(regop));
         current += PrintRightXMMOperand(current);
+      } else if (opcode == 0x70) {
+        AppendToBuffer("pshufd %s,",
+                       NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
+        AppendToBuffer(",0x%x", (*current) & 0xff);
+        current += 1;
+      } else if (opcode == 0x5B) {
+        AppendToBuffer("cvtps2dq %s,",
+                       NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
+      } else if (opcode == 0xFE) {
+        AppendToBuffer("paddd %s,",
+                       NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
+      } else if (opcode == 0xFA) {
+        AppendToBuffer("psubd %s,",
+                       NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
       } else if (opcode == 0x7E) {
         AppendToBuffer("mov%c ",
                        rex_w() ? 'q' : 'd');
@@ -1093,6 +1137,17 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
       } else if (opcode == 0x50) {
         AppendToBuffer("movmskpd %s,", NameOfCPURegister(regop));
         current += PrintRightXMMOperand(current);
+      } else if (opcode == 0x62) {
+        AppendToBuffer("punpackldq %s,", NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
+      } else if (opcode == 0x73) {
+        AppendToBuffer("psrldq ");
+        current += PrintRightXMMOperand(current);
+        AppendToBuffer(",0x%x", (*current) & 0xff);
+        current += 1;
+      } else if (opcode == 0xF4) {
+        AppendToBuffer("pmuludq %s,", NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
       } else {
         const char* mnemonic = "?";
         if (opcode == 0x54) {
@@ -1249,6 +1304,21 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
     current += PrintRightXMMOperand(current);
     AppendToBuffer(",%s", NameOfXMMRegister(regop));
 
+  } else if (opcode == 0x10) {
+    // movaps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("movups %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x11) {
+    // movaps xmm/m128, xmm
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("movups ");
+    current += PrintRightXMMOperand(current);
+    AppendToBuffer(", %s", NameOfXMMRegister(regop));
+
   } else if (opcode == 0xA2) {
     // CPUID
     AppendToBuffer("%s", mnemonic);
@@ -1292,6 +1362,100 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
     AppendToBuffer(", %d", (*current) & 3);
     current += 1;
 
+  } else if (opcode == 0xC6) {
+    // shufps xmm, xmm/m128, imm8
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("shufps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+    AppendToBuffer(", %d", (*current) & 3);
+    current += 1;
+
+  } else if (opcode == 0x54) {
+    // andps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("andps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x56) {
+    // orps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("orps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x58) {
+    // addps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("addps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x59) {
+    // mulps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("mulps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x5C) {
+    // subps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("subps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x5E) {
+    // divps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("divps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x5D) {
+    // minps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("minps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x5F) {
+    // maxps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("maxps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x5B) {
+    // cvtdq2ps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("cvtdq2ps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+
+  } else if (opcode == 0x53) {
+    // rcpps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("rcpps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x52) {
+    // rsqrtps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("rsqrtps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
+  } else if (opcode == 0x51) {
+    // sqrtps xmm, xmm/m128
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    AppendToBuffer("sqrtps %s, ", NameOfXMMRegister(regop));
+    current += PrintRightXMMOperand(current);
+
   } else if (opcode == 0x50) {
     // movmskps reg, xmm
     int mod, regop, rm;
@@ -1299,6 +1463,26 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
     AppendToBuffer("movmskps %s,", NameOfCPURegister(regop));
     current += PrintRightXMMOperand(current);
 
+  } else if (opcode == 0xC2) {
+    // Intel manual 2A, Table 3-11.
+    int mod, regop, rm;
+    get_modrm(*current, &mod, &regop, &rm);
+    const char* const pseudo_op[] = {
+      "cmpeqps",
+      "cmpltps",
+      "cmpleps",
+      "cmpunordps",
+      "cmpneqps",
+      "cmpnltps",
+      "cmpnleps",
+      "cmpordps"
+    };
+    AppendToBuffer("%s %s,%s",
+                   pseudo_op[current[1]],
+                   NameOfXMMRegister(regop),
+                   NameOfXMMRegister(rm));
+    current += 2;
+
   } else if ((opcode & 0xF0) == 0x80) {
     // Jcc: Conditional jump (branch).
     current = data + JumpConditional(data);