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alu.cpp
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alu.cpp
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#include "stdafx.h"
#include "cpu.h"
#include "memdescr.h"
#include "interrupts.h"
#include "modrm.h"
/*
Instruction OF SF ZF AF PF CF
AAA - - - TM - M
AAS - - - TM - M
AAD - M M - M -
AAM - M M - M -
DAA - M M TM M TM
DAS - M M TM M TM
ADC M M M M M TM
ADD M M M M M M
SBB M M M M M TM
SUB M M M M M M
CMP M M M M M M
CMPS M M M M M M
SCAS M M M M M M
NEG M M M M M M
DEC M M M M M
INC M M M M M
IMUL M - - - - M
MUL M - - - - M
RCL/RCR 1 M TM
RCL/RCR count - TM
ROL/ROR 1 M M
ROL/ROR count - M
SAL/SAR/SHL/SHR 1 M M M - M M
SAL/SAR/SHL/SHR count - M M - M M
SHLD/SHRD - M M - M M
BSF/BSR - - M - - -
BT/BTS/BTR/BTC - - - - - M
AND 0 M M - M 0
OR 0 M M - M 0
TEST 0 M M - M 0
XOR 0 M M - M 0
*/
const unsigned char psz[256] = {
F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0,
0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P,
0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P,
F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0,
0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P,
F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0,
F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0,
0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P
};
const unsigned char psz8[256] = {
F_P | F_Z, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0,
0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P,
0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P,
F_P, 0, 0, F_P, 0, F_P, F_P, 0, 0, F_P, F_P, 0, F_P, 0, 0, F_P, 0, F_P, F_P, 0, F_P, 0, 0, F_P, F_P, 0, 0, F_P, 0, F_P, F_P, 0,
F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S,
F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S,
F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S,
F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_S, F_P | F_S, F_P | F_S, F_S, F_P | F_S, F_S, F_S, F_P | F_S
};
void setpsz8(unsigned char value)
{
r.flags &= ~(F_P | F_S | F_Z);
r.flags |= psz8[value];
}
void setpsz16(unsigned short value)
{
r.flags &= ~(F_P | F_S | F_Z);
r.flags |= psz[value & 0xFF];
if (value & 0x8000)
r.flags |= F_S;
if (value == 0)
r.flags |= F_Z;
}
void setpsz32(unsigned int value)
{
r.flags &= ~(F_P | F_S | F_Z);
r.flags |= psz[value & 0xFF];
if (value & 0x80000000u)
r.flags |= F_S;
if (value == 0)
r.flags |= F_Z;
}
unsigned short signext8(unsigned char v)
{
if (v & 0x80)
return v | 0xFF00u;
return v;
}
unsigned int signext16(unsigned short v)
{
if (v & 0x8000u)
return v | 0xFFFF0000u;
return v;
}
unsigned char add8(unsigned char a, unsigned char b, unsigned char c)
{
unsigned short res = a + b + c;
setpsz8((unsigned char)res);
r.flags &= ~(F_C | F_O | F_A);
if (!((a ^ b) & 0x80) && ((a ^ res) & 0x80))
r.flags |= F_O;
if (res & 0xFF00)
r.flags |= F_C;
if (((a & 0xF) + (b & 0xF)) & 0x10) // ((res ^ a ^ b) & 0x10)
r.flags |= F_A;
return (unsigned char)res;
}
unsigned short add16(unsigned short a, unsigned short b, unsigned short c)
{
unsigned int res = a + b + c;
setpsz16(res);
r.flags &= ~(F_C | F_O | F_A);
if (!((a ^ b) & 0x8000) && ((a ^ res) & 0x8000))
r.flags |= F_O;
if (res & 0xFFFF0000u)
r.flags |= F_C;
if (((a & 0xF) + (b & 0xF)) & 0x10) // ((res ^ a ^ b) & 0x10)
r.flags |= F_A;
return res;
}
unsigned int add32(unsigned int a, unsigned int b, unsigned int c)
{
unsigned int res;
res = a + b + c;
setpsz32(res);
r.flags &= ~(F_C | F_O | F_A);
if (!((a ^ b) & 0x80000000u) && ((a ^ res) & 0x80000000u))
r.flags |= F_O;
if ((a > res) || ((a == res) && c)) // (res < a)
r.flags |= F_C;
if (((a & 0xF) + (b & 0xF)) & 0x10) // ((res ^ a ^ b) & 0x10)
r.flags |= F_A;
return res;
}
unsigned char sub8(unsigned char a, unsigned char b, unsigned char c)
{
unsigned short res;
// b += c;
res = (unsigned short)a - (unsigned short)(b + c);
setpsz8((unsigned char)res);
r.flags &= ~(F_C | F_O | F_A);
if ((res ^ a) & (a ^ b) & 0x80)
r.flags |= F_O;
if (res & 0x100)
r.flags |= F_C;
if (((a & 0xF) - (b & 0xF)) & 0x10) // ((res ^ a ^ b) & 0x10)
r.flags |= F_A;
return (unsigned char)res;
}
unsigned short sub16(unsigned short a, unsigned short b, unsigned short c)
{
// b += c;
unsigned int res;
res = (unsigned int)a - (unsigned int)(b + c);
setpsz16((unsigned short)res);
r.flags &= ~(F_C | F_O | F_A);
if ((res ^ a) & (a ^ b) & 0x8000u)
r.flags |= F_O;
if (res & 0x10000)
r.flags |= F_C;
if (((a & 0xF) - (b & 0xF)) & 0x10) // ((res ^ a ^ b) & 0x10)
r.flags |= F_A;
return res;
}
unsigned int sub32(unsigned int a, unsigned int b, unsigned int c)
{
// b += c;
unsigned int res;
res = (unsigned int)a - (unsigned int)(b + c);
setpsz32(res);
r.flags &= ~(F_C | F_O | F_A);
if ((res ^ a) & (a ^ b) & 0x80000000u)
r.flags |= F_O;
if ((a < res) || ((a == res) && c))
r.flags |= F_C;
if (((a & 0xF) - (b & 0xF)) & 0x10) // ((res ^ a ^ b) & 0x10)
r.flags |= F_A;
return res;
}
unsigned char inc8(unsigned char a)
{
unsigned char res;
res = a + 1;
setpsz8(res);
r.flags &= ~(F_O | F_A);
if (res == 0x80)
r.flags |= F_O;
if ((res & 0x0F) == 0)
r.flags |= F_A;
return res;
}
unsigned short inc16(unsigned short a)
{
unsigned short res;
res = a + 1;
setpsz16(res);
r.flags &= ~(F_O | F_A);
if (res == 0x8000)
r.flags |= F_O;
if ((res & 0x0F) == 0)
r.flags |= F_A;
return res;
}
unsigned int inc32(unsigned int a)
{
unsigned int res;
res = a + 1;
setpsz32(res);
r.flags &= ~(F_O | F_A);
if (res == 0x80000000u)
r.flags |= F_O;
if ((res & 0x0F) == 0)
r.flags |= F_A;
return res;
}
unsigned char dec8(unsigned char a)
{
unsigned char res;
res = a - 1;
setpsz8(res);
r.flags &= ~(F_O | F_A);
if (res == 0x7F)
r.flags |= F_O;
if ((res & 0x0F) == 0x0F)
r.flags |= F_A;
return res;
}
unsigned short dec16(unsigned short a)
{
unsigned short res;
res = a - 1;
setpsz16(res);
r.flags &= ~(F_O | F_A);
if (res == 0x7FFF)
r.flags |= F_O;
if ((res & 0x0F) == 0x0F)
r.flags |= F_A;
return res;
}
unsigned int dec32(unsigned int a)
{
unsigned int res;
res = a - 1;
setpsz32(res);
r.flags &= ~(F_O | F_A);
if (res == 0x7FFFFFFFu)
r.flags |= F_O;
if ((res & 0x0F) == 0x0F)
r.flags |= F_A;
return res;
}
unsigned char or8(unsigned char a, unsigned char b)
{
unsigned int res;
res = a | b;
setpsz8(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned short or16(unsigned short a, unsigned short b)
{
unsigned int res;
res = a | b;
setpsz16(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned int or32(unsigned int a, unsigned int b)
{
unsigned int res;
res = a | b;
setpsz32(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned char and8(unsigned char a, unsigned char b)
{
unsigned int res;
res = a & b;
setpsz8(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned short and16(unsigned short a, unsigned short b)
{
unsigned int res;
res = a & b;
setpsz16(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned int and32(unsigned int a, unsigned int b)
{
unsigned int res;
res = a & b;
setpsz32(res);
r.flags &= ~(F_C | F_O);
return res;
}
void test8(unsigned char a, unsigned char b)
{
setpsz8(a & b);
r.flags &= ~(F_C | F_O);
}
void test16(unsigned short a, unsigned short b)
{
setpsz16(a & b);
r.flags &= ~(F_C | F_O);
}
void test32(unsigned int a, unsigned int b)
{
setpsz32(a & b);
r.flags &= ~(F_C | F_O);
}
unsigned char xor8(unsigned char a, unsigned char b)
{
unsigned int res;
res = a ^ b;
setpsz8(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned short xor16(unsigned short a, unsigned short b)
{
unsigned int res;
res = a ^ b;
setpsz16(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned int xor32(unsigned int a, unsigned int b)
{
unsigned int res;
res = a ^ b;
setpsz32(res);
r.flags &= ~(F_C | F_O);
return res;
}
unsigned short imul8(char a, char b)
{
unsigned short res = (unsigned short)(a * b);
if (((res & 0xFF80) == 0xFF80) || ((res & 0xFF80) == 0))
r.flags &= ~(F_C | F_O);
else
r.flags |= F_C | F_O;
return res;
}
unsigned int imul16(short a, short b)
{
unsigned int res = (unsigned int)(a * b);
if (((res & 0xFFFF8000u) == 0xFFFF8000u) || ((res & 0xFFFF8000u) == 0))
r.flags &= ~(F_C | F_O);
else
r.flags |= F_C | F_O;
return res;
}
unsigned long long imul32(int a, int b)
{
unsigned long long res = (unsigned long long)(a * (long long)b);
if (((res & 0xFFFFFFFF80000000ull) == 0xFFFFFFFF80000000ull) || ((res & 0xFFFFFFFF80000000ull) == 0))
r.flags &= ~(F_C | F_O);
else
r.flags |= F_C | F_O;
return res;
}
unsigned short mul8(unsigned char a, unsigned char b)
{
unsigned int res;
res = a * b;
if (res == 0)
r.flags |= F_Z;
else
r.flags &= ~F_Z;
if (res & 0xFF00u)
r.flags |= F_C | F_O;
else
r.flags &= ~(F_C | F_O);
return res;
}
unsigned int mul16(unsigned short a, unsigned short b)
{
unsigned int res;
res = a * b;
if (res == 0)
r.flags |= F_Z;
else
r.flags &= ~F_Z;
if (res & 0xFFFF0000u)
r.flags |= F_C | F_O;
else
r.flags &= ~(F_C | F_O);
return res;
}
unsigned long long mul32(unsigned int a, unsigned int b)
{
unsigned long long res;
res = a * (unsigned long long)b;
if (res == 0)
r.flags |= F_Z;
else
r.flags &= ~F_Z;
if (res & 0xFFFFFFFF00000000ull)
r.flags |= F_C | F_O;
else
r.flags &= ~(F_C | F_O);
return res;
}
int idiv8(short a, char b, char *q, char *r)
{
int qu;
if (b == 0)
{
ex(0);
return 0;
}
qu = a / b;
*q = qu;
*r = a % b;
if (qu != *q)
{
ex(0);
return 0;
}
return 1;
}
int idiv16(int a, short b, short *q, short *r)
{
int qu;
if (b == 0)
{
ex(0);
return 0;
}
qu = a / b;
*q = qu;
*r = a % b;
if (qu != *q)
{
ex(0);
return 0;
}
return 1;
}
int idiv32(long long a, int b, int *q, int *r)
{
long long qu;
if (b == 0)
{
ex(0);
return 0;
}
qu = a / b;
*q = (int)qu;
*r = (int)(a - *q * (long long)b);
if (qu != *q)
{
ex(0);
return 0;
}
return 1;
}
int div8(unsigned short a, unsigned char b, unsigned char *q, unsigned char *r)
{
unsigned short qu;
if (b == 0)
{
ex(0);
return 0;
}
qu = a / b;
*q = (unsigned char)qu;
*r = a % b;
if (qu != *q)
{
ex(0);
return 0;
}
return 1;
}
int div16(unsigned int a, unsigned short b, unsigned short *q, unsigned short *r)
{
unsigned int qu;
if (b == 0)
{
ex(0);
return 0;
}
qu = a / b;
*q = qu;
*r = a % b;
if (qu != *q)
{
ex(0);
return 0;
}
return 1;
}
int div32(unsigned long long a, unsigned long long b, unsigned int *q, unsigned int *r)
{
unsigned long long qu;
if (b == 0)
{
ex(0);
return 0;
}
qu = a / b;
*q = (unsigned int)qu;
*r = (unsigned int)(a % b);
if (qu != *q)
{
ex(0);
return 0;
}
return 1;
}
unsigned short dshl16(unsigned short a, unsigned short b, unsigned short n)
{
unsigned short v;
if (n > 16 && 0)
{
a = b;
n -= 16;
}
n &= 15;
v = (a << n) | (b >> (16 - n));
if ((a << (n - 1)) & 0x8000u)
r.eflags |= F_C;
else
r.eflags &= ~F_C;
setpsz16(v);
return v;
}
unsigned int dshl32(unsigned int a, unsigned int b, unsigned int n)
{
unsigned int v;
n &= 31;
v = (a << n) | (b >> (32 - n));
if ((a << (n - 1)) & 0x80000000u)
r.eflags |= F_C;
else
r.eflags &= ~F_C;
setpsz32(v);
return v;
}
unsigned short dshr16(unsigned short a, unsigned short b, unsigned short n)
{
unsigned short v;
if (n > 16 && 0)
{
a = b;
n -= 16;
}
n &= 15;
v = (a >> n) | (b << (16 - n));
if ((a >> (n - 1)) & 1)
r.eflags |= F_C;
else
r.eflags &= ~F_C;
setpsz16(v);
return v;
}
unsigned int dshr32(unsigned int a, unsigned int b, unsigned int n)
{
unsigned int v;
n &= 31;
v = (a >> n) | (b << (32 - n));
if ((a >> (n - 1)) & 1)
r.eflags |= F_C;
else
r.eflags &= ~F_C;
setpsz32(v);
return v;
}
unsigned char rol8(unsigned char v, unsigned char n)
{
unsigned char res;
n &= 7;
res = (v << n) | (v >> (8 - n));
if (res & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res >> 7)) & 0x01)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned char ror8(unsigned char v, unsigned char n)
{
unsigned char res;
n &= 7;
res = (v >> n) | (v << (8 - n));
if (res & 0x80)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res << 1)) & 0x80)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned char rcl8(unsigned char v, unsigned char n)
{
unsigned char res, c;
c = r.eflags & F_C ? 1 : 0;
n %= 9;
res = (v << n) | (c << (n - 1)) | (v >> (9 - n));
if ((v >> (8 - n)) & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
c = r.eflags & F_C ? 1 : 0;
if ((c ^ (res >> 7)) & 0x01)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned char rcr8(unsigned char v, unsigned char n)
{
unsigned char res, c;
c = r.eflags & F_C ? 1 : 0;
n %= 9;
res = (v >> n) | (c << (8 - n)) | (v << (9 - n));
if ((v >> (n - 1)) & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res << 1)) & 0x80)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned char shl8(unsigned char v, unsigned char n)
{
/*
int i;
for (i = 0; i < n; i++)
{
if (v & 0x80)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v << 1;
}
setpsz8(v);
r.flags &= ~F_O;
if (n == 1)
if ((v ^ (v << 1)) & 0x80)
r.flags |= F_O;
return v;
*/
if ((v << (n - 1)) & 0x80)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v << n;
setpsz8(v);
r.flags &= ~F_O;
if (((v << n) ^ (v << (n - 1))) & 0x80) //((v ^ (v << 1)) & 0x80)
r.flags |= F_O;
return v;
}
unsigned short shl16(unsigned short v, unsigned char n)
{
/*
int i;
for (i = 0; i < n; i++)
{
if (v & 0x8000)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v << 1;
}
setpsz16(v);
r.flags &= ~F_O;
if (n == 1)
if ((v ^ (v << 1)) & 0x8000)
r.flags |= F_O;
return v;
*/
if ((v << (n - 1)) & 0x8000)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v << n;
setpsz16(v);
r.flags &= ~F_O;
if (((v << n) ^ (v << (n - 1))) & 0x8000) //((v ^ (v << 1)) & 0x8000)
r.flags |= F_O;
return v;
}
unsigned int shl32(unsigned int v, unsigned char n)
{
/*
int i;
for (i = 0; i < n; i++)
{
if (v & 0x80000000u)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v << 1;
}
setpsz32(v);
r.flags &= ~F_O;
if (n == 1)
if ((v ^ (v << 1)) & 0x80000000u)
r.flags |= F_O;
return v;
*/
if ((v << (n - 1)) & 0x80000000u)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v << n;
setpsz32(v);
r.flags &= ~F_O;
if (((v << n) ^ (v << (n - 1))) & 0x80000000u) //((v ^ (v << 1)) & 0x80000000u)
r.flags |= F_O;
return v;
}
unsigned short rol16(unsigned short v, unsigned char n)
{
unsigned short res;
n &= 15;
res = (v << n) | (v >> (16 - n));
if (res & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res >> 15)) & 0x01)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned int rol32(unsigned int v, unsigned char n)
{
unsigned int res;
n &= 31;
res = (v << n) | (v >> (32 - n));
if (res & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res >> 31u)) & 0x01)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned short ror16(unsigned short v, unsigned char n)
{
unsigned short res;
n &= 15;
res = (v >> n) | (v << (16 - n));
if (res & 0x8000)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res << 1)) & 0x8000)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned int ror32(unsigned int v, unsigned char n)
{
unsigned int res;
n &= 31;
res = (v >> n) | (v << (32 - n));
if (res & 0x80000000u)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res << 1)) & 0x80000000u)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned short rcl16(unsigned short v, unsigned char n)
{
unsigned short res, c;
c = r.eflags & F_C ? 1 : 0;
n %= 17;
res = (v << n) | (c << (n - 1)) | (v >> (17 - n));
if ((v >> (16 - n)) & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
c = r.eflags & F_C ? 1 : 0;
if ((c ^ (res >> 15)) & 0x01)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned int rcl32(unsigned int v, unsigned char n)
{
unsigned int res, c;
c = r.eflags & F_C ? 1 : 0;
if (n == 1)
res = (v << 1u) | c;
else
res = (v << n) | (c << (n - 1)) | (v >> (33u - n));
if ((v >> (32u - n)) & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
c = r.eflags & F_C ? 1 : 0;
if ((c ^ (res >> 31)) & 0x01)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned short rcr16(unsigned short v, unsigned char n)
{
unsigned short res, c;
c = r.eflags & F_C ? 1 : 0;
n %= 17;
res = (v >> n) | (c << (16 - n)) | (v << (17 - n));
if ((v >> (n - 1)) & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res << 1)) & 0x8000)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned int rcr32(unsigned int v, unsigned char n)
{
unsigned int res, c;
c = r.eflags & F_C ? 1 : 0;
if (n == 1)
res = (v >> 1) | (v << 31u);
else
res = (v >> n) | (c << (32 - n)) | (v << (33 - n));
if ((v >> (n - 1)) & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;
if ((res ^ (res << 1)) & 0x80000000u)
r.flags |= F_O;
else
r.flags &= ~F_O;
return res;
}
unsigned char shr8(unsigned char v, unsigned char n)
{
if ((v >> (n - 1)) & 0x01)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v >> n;
setpsz8(v);
r.flags &= ~F_O;
if (v & 0x80)//((v ^ (v << 1)) & 0x80)
r.flags |= F_O;
return v;
}
unsigned short shr16(unsigned short v, unsigned char n)
{
if ((v >> (n - 1)) & 0x01)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v >> n;
setpsz16(v);
r.flags &= ~F_O;
if (v & 0x8000)//((v ^ (v << 1)) & 0x8000)
r.flags |= F_O;
return v;
}
unsigned int shr32(unsigned int v, unsigned char n)
{
if ((v >> (n - 1)) & 0x01)
r.flags |= F_C;
else
r.flags &= ~F_C;
v = v >> n;
setpsz32(v);
r.flags &= ~F_O;
if (v & 0x80000000u)//((v ^ (v << 1)) & 0x80000000u)
r.flags |= F_O;
return v;
}
unsigned char sar8(unsigned char v, unsigned char n)
{
unsigned char res;
if (n > 8)
n = 8;
if (v & 0x80)
{
res = (v >> n) | (0xff << (8 - n));
n--;
if (((v >> n) | (0xff << (8 - n))) & 1)
r.flags |= F_C;
else
r.flags &= ~F_C;