mirror of
https://github.com/ApfelTeeSaft/reactos.git
synced 2026-09-03 04:13:31 +00:00
[SOFT386]
Implement opcode group 0xF7. svn path=/branches/ntvdm/; revision=60582
This commit is contained in:
Aleksandar Andrejevic
+256
-4
@@ -1070,7 +1070,7 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupF6)
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USHORT Result = (USHORT)Value * (USHORT)State->GeneralRegs[SOFT386_REG_EAX].LowByte;
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/* Update the flags */
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State->Flags.Cf = State->Flags.Of = (Result & 0xFF00) ? TRUE : FALSE;
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State->Flags.Cf = State->Flags.Of = HIBYTE(Result) ? TRUE : FALSE;
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/* Write back the result */
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State->GeneralRegs[SOFT386_REG_EAX].LowWord = Result;
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@@ -1084,7 +1084,8 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupF6)
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SHORT Result = (SHORT)Value * (SHORT)State->GeneralRegs[SOFT386_REG_EAX].LowByte;
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/* Update the flags */
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State->Flags.Cf = State->Flags.Of = ((Result > 255) || (Result < 256)) ? TRUE : FALSE;
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State->Flags.Cf = State->Flags.Of =
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((Result < -128) || (Result > 127)) ? TRUE : FALSE;
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/* Write back the result */
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State->GeneralRegs[SOFT386_REG_EAX].LowWord = (USHORT)Result;
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@@ -1124,8 +1125,259 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupF6)
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SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupF7)
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{
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UNIMPLEMENTED;
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return FALSE; // TODO: NOT IMPLEMENTED
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ULONG Dummy, Value, SignFlag;
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SOFT386_MOD_REG_RM ModRegRm;
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BOOLEAN OperandSize, AddressSize;
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OperandSize = AddressSize = State->SegmentRegs[SOFT386_REG_CS].Size;
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if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
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{
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/* The OPSIZE prefix toggles the size */
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OperandSize = !OperandSize;
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}
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if (State->PrefixFlags & SOFT386_PREFIX_ADSIZE)
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{
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/* The ADSIZE prefix toggles the size */
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AddressSize = !AddressSize;
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}
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if (!Soft386ParseModRegRm(State, AddressSize, &ModRegRm))
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{
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/* Exception occurred */
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return FALSE;
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}
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/* Set the sign flag */
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if (OperandSize) SignFlag = SIGN_FLAG_LONG;
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else SignFlag = SIGN_FLAG_WORD;
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/* Read the operand */
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if (OperandSize)
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{
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/* 32-bit */
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if (!Soft386ReadModrmDwordOperands(State, &ModRegRm, &Dummy, &Value))
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{
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/* Exception occurred */
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return FALSE;
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}
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}
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else
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{
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/* 16-bit */
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if (!Soft386ReadModrmWordOperands(State, &ModRegRm, (PUSHORT)&Dummy, (PUSHORT)&Value))
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{
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/* Exception occurred */
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return FALSE;
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}
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}
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switch (ModRegRm.Register)
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{
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/* TEST */
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case 0:
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case 1:
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{
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ULONG Immediate = 0, Result = 0;
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if (OperandSize)
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{
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/* Fetch the immediate dword */
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if (!Soft386FetchDword(State, &Immediate))
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{
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/* Exception occurred */
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return FALSE;
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}
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}
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else
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{
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/* Fetch the immediate word */
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if (!Soft386FetchWord(State, (PUSHORT)&Immediate))
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{
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/* Exception occurred */
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return FALSE;
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}
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}
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/* Calculate the result */
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Result = Value & Immediate;
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/* Update the flags */
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State->Flags.Cf = FALSE;
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State->Flags.Of = FALSE;
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State->Flags.Zf = (Result == 0) ? TRUE : FALSE;
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State->Flags.Sf = (Result & SignFlag) ? TRUE : FALSE;
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State->Flags.Pf = Soft386CalculateParity(Result);
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break;
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}
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/* NOT */
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case 2:
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{
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/* Write back the result */
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if (OperandSize)
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{
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/* 32-bit */
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return Soft386WriteModrmDwordOperands(State, &ModRegRm, FALSE, ~Value);
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}
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else
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{
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/* 16-bit */
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return Soft386WriteModrmWordOperands(State, &ModRegRm, FALSE, LOWORD(~Value));
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}
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}
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/* NEG */
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case 3:
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{
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/* Calculate the result */
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ULONG Result = -Value;
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if (!OperandSize) Result &= 0xFFFF;
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/* Update the flags */
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State->Flags.Cf = (Value != 0) ? TRUE : FALSE;
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State->Flags.Of = (Value & SignFlag) && (Result & SignFlag);
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State->Flags.Af = ((Value & 0x0F) != 0) ? TRUE : FALSE;
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State->Flags.Zf = (Result == 0) ? TRUE : FALSE;
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State->Flags.Sf = (Result & SignFlag) ? TRUE : FALSE;
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State->Flags.Pf = Soft386CalculateParity(Result);
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/* Write back the result */
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if (OperandSize)
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{
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/* 32-bit */
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return Soft386WriteModrmDwordOperands(State, &ModRegRm, FALSE, Result);
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}
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else
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{
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/* 16-bit */
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return Soft386WriteModrmWordOperands(State, &ModRegRm, FALSE, LOWORD(Result));
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}
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}
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/* MUL */
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case 4:
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{
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if (OperandSize)
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{
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ULONGLONG Result = (ULONGLONG)Value * (ULONGLONG)State->GeneralRegs[SOFT386_REG_EAX].Long;
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/* Update the flags */
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State->Flags.Cf = State->Flags.Of =
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(Result & 0xFFFFFFFF00000000ULL) ? TRUE : FALSE;
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/* Write back the result */
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State->GeneralRegs[SOFT386_REG_EAX].Long = Result & 0xFFFFFFFFULL;
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State->GeneralRegs[SOFT386_REG_EDX].Long = Result >> 32;
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}
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else
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{
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ULONG Result = (ULONG)Value * (ULONG)State->GeneralRegs[SOFT386_REG_EAX].LowWord;
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/* Update the flags */
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State->Flags.Cf = State->Flags.Of = HIWORD(Result) ? TRUE : FALSE;
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/* Write back the result */
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State->GeneralRegs[SOFT386_REG_EAX].LowWord = LOWORD(Result);
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State->GeneralRegs[SOFT386_REG_EDX].LowWord = HIWORD(Result);
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}
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break;
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}
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/* IMUL */
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case 5:
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{
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if (OperandSize)
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{
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LONGLONG Result = (LONGLONG)Value * (LONGLONG)State->GeneralRegs[SOFT386_REG_EAX].Long;
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/* Update the flags */
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State->Flags.Cf = State->Flags.Of =
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((Result < -2147483648LL) || (Result > 2147483647LL)) ? TRUE : FALSE;
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/* Write back the result */
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State->GeneralRegs[SOFT386_REG_EAX].Long = Result & 0xFFFFFFFFULL;
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State->GeneralRegs[SOFT386_REG_EDX].Long = Result >> 32;
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}
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else
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{
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LONG Result = (LONG)Value * (LONG)State->GeneralRegs[SOFT386_REG_EAX].LowWord;
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/* Update the flags */
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State->Flags.Cf = State->Flags.Of =
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((Result < -32768) || (Result > 32767)) ? TRUE : FALSE;
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/* Write back the result */
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State->GeneralRegs[SOFT386_REG_EAX].LowWord = LOWORD(Result);
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State->GeneralRegs[SOFT386_REG_EDX].LowWord = HIWORD(Result);
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}
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break;
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}
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/* DIV */
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case 6:
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{
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if (OperandSize)
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{
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ULONGLONG Dividend = (ULONGLONG)State->GeneralRegs[SOFT386_REG_EAX].Long
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| ((ULONGLONG)State->GeneralRegs[SOFT386_REG_EDX].Long << 32);
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ULONG Quotient = Dividend / Value;
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ULONG Remainder = Dividend % Value;
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/* Write back the results */
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State->GeneralRegs[SOFT386_REG_EAX].Long = Quotient;
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State->GeneralRegs[SOFT386_REG_EDX].Long = Remainder;
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}
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else
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{
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ULONG Dividend = (ULONG)State->GeneralRegs[SOFT386_REG_EAX].LowWord
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| ((ULONG)State->GeneralRegs[SOFT386_REG_EDX].LowWord << 16);
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USHORT Quotient = Dividend / Value;
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USHORT Remainder = Dividend % Value;
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/* Write back the results */
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State->GeneralRegs[SOFT386_REG_EAX].LowWord = Quotient;
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State->GeneralRegs[SOFT386_REG_EDX].LowWord = Remainder;
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}
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break;
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}
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/* IDIV */
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case 7:
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{
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if (OperandSize)
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{
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LONGLONG Dividend = (LONGLONG)State->GeneralRegs[SOFT386_REG_EAX].Long
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| ((LONGLONG)State->GeneralRegs[SOFT386_REG_EDX].Long << 32);
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LONG Quotient = Dividend / (LONG)Value;
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LONG Remainder = Dividend % (LONG)Value;
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/* Write back the results */
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State->GeneralRegs[SOFT386_REG_EAX].Long = (ULONG)Quotient;
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State->GeneralRegs[SOFT386_REG_EDX].Long = (ULONG)Remainder;
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}
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else
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{
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LONG Dividend = (LONG)State->GeneralRegs[SOFT386_REG_EAX].LowWord
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| ((LONG)State->GeneralRegs[SOFT386_REG_EDX].LowWord << 16);
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SHORT Quotient = Dividend / (SHORT)Value;
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SHORT Remainder = Dividend % (SHORT)Value;
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/* Write back the results */
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State->GeneralRegs[SOFT386_REG_EAX].LowWord = (USHORT)Quotient;
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State->GeneralRegs[SOFT386_REG_EDX].LowWord = (USHORT)Remainder;
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}
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break;
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}
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}
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return TRUE;
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}
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SOFT386_OPCODE_HANDLER(Soft386OpcodeGroupFE)
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