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[FAST486]

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Add constants for numeric limits.


svn path=/trunk/; revision=68079
This commit is contained in:
Aleksandar Andrejevic 2015-06-08 15:56:19 +00:00
parent ea6ec077c9
commit 8469eeff5e
3 changed files with 17 additions and 8 deletions
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7
reactos/include/reactos/libs/fast486/fast486.h
View file

@ -30,6 +30,13 @@
#define FASTCALL __fastcall
#endif
#define FAST486_CHAR_MIN (-128)
#define FAST486_CHAR_MAX (127)
#define FAST486_SHORT_MIN (-32768L)
#define FAST486_SHORT_MAX (32767L)
#define FAST486_LONG_MIN (-2147483648LL)
#define FAST486_LONG_MAX (2147483647LL)
#define FAST486_NUM_GEN_REGS 8
#define FAST486_NUM_SEG_REGS 6
#define FAST486_NUM_CTRL_REGS 3

6
reactos/lib/fast486/opcodes.c
View file

@ -3532,7 +3532,8 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeImulModrmImm)
Product = (LONGLONG)Multiplicand * (LONGLONG)Multiplier;
/* Check for carry/overflow */
State->Flags.Cf = State->Flags.Of = ((Product < -2147483648LL) || (Product > 2147483647LL));
State->Flags.Cf = State->Flags.Of = ((Product < FAST486_LONG_MIN)
|| (Product > FAST486_LONG_MAX));
/* Write-back the result */
Fast486WriteModrmDwordOperands(State,
@ -3559,7 +3560,8 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeImulModrmImm)
Product = (LONG)Multiplicand * (LONG)Multiplier;
/* Check for carry/overflow */
State->Flags.Cf = State->Flags.Of = ((Product < -32768) || (Product > 32767));
State->Flags.Cf = State->Flags.Of = ((Product < FAST486_SHORT_MIN)
|| (Product > FAST486_SHORT_MAX));
/* Write-back the result */
Fast486WriteModrmWordOperands(State,

12
reactos/lib/fast486/opgroups.c
View file

@ -969,7 +969,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF6)
SHORT Result = (SHORT)((CHAR)Value) * (SHORT)((CHAR)State->GeneralRegs[FAST486_REG_EAX].LowByte);
/* Update the flags */
State->Flags.Cf = State->Flags.Of = ((Result < -128) || (Result > 127));
State->Flags.Cf = State->Flags.Of = ((Result < FAST486_CHAR_MIN) || (Result > FAST486_CHAR_MAX));
/* Write back the result */
State->GeneralRegs[FAST486_REG_EAX].LowWord = (USHORT)Result;
@ -1023,7 +1023,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF6)
Quotient = (SHORT)State->GeneralRegs[FAST486_REG_EAX].LowWord / (CHAR)Value;
Remainder = (SHORT)State->GeneralRegs[FAST486_REG_EAX].LowWord % (CHAR)Value;
if (Quotient > 127 || Quotient < -128)
if (Quotient > FAST486_CHAR_MAX || Quotient < FAST486_CHAR_MIN)
{
/* Divide error */
Fast486Exception(State, FAST486_EXCEPTION_DE);
@ -1205,7 +1205,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF7)
LONGLONG Result = (LONGLONG)((LONG)Value) * (LONGLONG)((LONG)State->GeneralRegs[FAST486_REG_EAX].Long);
/* Update the flags */
State->Flags.Cf = State->Flags.Of = ((Result < -2147483648LL) || (Result > 2147483647LL));
State->Flags.Cf = State->Flags.Of = ((Result < FAST486_LONG_MIN) || (Result > FAST486_LONG_MAX));
/* Write back the result */
State->GeneralRegs[FAST486_REG_EAX].Long = Result & 0xFFFFFFFFULL;
@ -1216,7 +1216,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF7)
LONG Result = (LONG)((SHORT)Value) * (LONG)((SHORT)State->GeneralRegs[FAST486_REG_EAX].LowWord);
/* Update the flags */
State->Flags.Cf = State->Flags.Of = ((Result < -32768) || (Result > 32767));
State->Flags.Cf = State->Flags.Of = ((Result < FAST486_SHORT_MIN) || (Result > FAST486_SHORT_MAX));
/* Write back the result */
State->GeneralRegs[FAST486_REG_EAX].LowWord = LOWORD(Result);
@ -1293,7 +1293,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF7)
LONGLONG Quotient = Dividend / (LONG)Value;
LONG Remainder = Dividend % (LONG)Value;
if (Quotient > 2147483647LL || Quotient < -2147483648LL)
if (Quotient > FAST486_LONG_MAX || Quotient < FAST486_LONG_MIN)
{
/* Divide error */
Fast486Exception(State, FAST486_EXCEPTION_DE);
@ -1311,7 +1311,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF7)
LONG Quotient = Dividend / (SHORT)LOWORD(Value);
SHORT Remainder = Dividend % (SHORT)LOWORD(Value);
if (Quotient > 32767 || Quotient < -32768)
if (Quotient > FAST486_SHORT_MAX || Quotient < FAST486_SHORT_MIN)
{
/* Divide error */
Fast486Exception(State, FAST486_EXCEPTION_DE);