commit 0d5e116f6aee03185f237311a943491bb079a768
author Kristian Monsen <kristianm@google.com> Thu Sep 30 15:31:59 2010 +0100
committer Kristian Monsen <kristianm@google.com> Wed Oct 06 14:06:50 2010 +0100
tree e0a80472bc3151e606a32e8d68079579c8143495
parent 59151504615d929945dc59db37bf1166937748c6

update V8 to r5532 as required by WebKit r68651

Change-Id: I5f75eeffbf64b30dd5080348528d277f293490ad

src/x64/disasm-x64.cc

diff --git a/src/x64/disasm-x64.cc b/src/x64/disasm-x64.cc
index 7c9dfc1..4213912 100644
--- a/src/x64/disasm-x64.cc
+++ b/src/x64/disasm-x64.cc
@@ -891,6 +891,10 @@
 
     case 0xD9:
       switch (modrm_byte & 0xF8) {
+        case 0xC0:
+          mnem = "fld";
+          has_register = true;
+          break;
         case 0xC8:
           mnem = "fxch";
           has_register = true;
@@ -901,6 +905,7 @@
             case 0xE1: mnem = "fabs"; break;
             case 0xE4: mnem = "ftst"; break;
             case 0xE8: mnem = "fld1"; break;
+            case 0xEB: mnem = "fldpi"; break;
             case 0xEE: mnem = "fldz"; break;
             case 0xF5: mnem = "fprem1"; break;
             case 0xF7: mnem = "fincstp"; break;
@@ -1059,6 +1064,21 @@
       get_modrm(*current, &mod, &regop, &rm);
       AppendToBuffer("%sd %s,", mnemonic, NameOfXMMRegister(regop));
       current += PrintRightOperand(current);
+    } else if (opcode == 0x2C) {
+      // CVTTSD2SI:
+      // Convert with truncation scalar double-precision FP to integer.
+      int mod, regop, rm;
+      get_modrm(*current, &mod, &regop, &rm);
+      AppendToBuffer("cvttsd2si%c %s,",
+          operand_size_code(), NameOfCPURegister(regop));
+      current += PrintRightXMMOperand(current);
+    } else if (opcode == 0x2D) {
+      // CVTSD2SI: Convert scalar double-precision FP to integer.
+      int mod, regop, rm;
+      get_modrm(*current, &mod, &regop, &rm);
+      AppendToBuffer("cvtsd2si%c %s,",
+          operand_size_code(), NameOfCPURegister(regop));
+      current += PrintRightXMMOperand(current);
     } else if ((opcode & 0xF8) == 0x58 || opcode == 0x51) {
       // XMM arithmetic. Mnemonic was retrieved at the start of this function.
       int mod, regop, rm;
@@ -1089,11 +1109,14 @@
       AppendToBuffer("%ss %s,", mnemonic, NameOfXMMRegister(regop));
       current += PrintRightOperand(current);
     } else if (opcode == 0x2C) {
-      // CVTTSS2SI: Convert scalar single-precision FP to dword integer.
+      // CVTTSS2SI:
+      // Convert with truncation scalar single-precision FP to dword integer.
       // Assert that mod is not 3, so source is memory, not an XMM register.
       ASSERT_NE(0xC0, *current & 0xC0);
       current += PrintOperands("cvttss2si", REG_OPER_OP_ORDER, current);
     } else if (opcode == 0x5A) {
+      // CVTSS2SD:
+      // Convert scalar single-precision FP to scalar double-precision FP.
       int mod, regop, rm;
       get_modrm(*current, &mod, &regop, &rm);
       AppendToBuffer("cvtss2sd %s,", NameOfXMMRegister(regop));
@@ -1450,12 +1473,12 @@
         data++;
         int mod, regop, rm;
         get_modrm(*data, &mod, &regop, &rm);
-        if (mod == 3 && regop == 1) {
-          AppendToBuffer("decb %s", NameOfCPURegister(rm));
+        if (regop == 1) {
+          AppendToBuffer("decb ");
+          data += PrintRightOperand(data);
         } else {
           UnimplementedInstruction();
         }
-        data++;
       }
         break;