idiv.c File Reference

#include <stdint.h>
#include <errno.h>
#include "emu/emu.h"
#include "emu/emu_cpu.h"
#include "emu/emu_cpu_data.h"
#include "emu/emu_cpu_stack.h"
#include "emu/emu_memory.h"

Include dependency graph for idiv.c:

Defines
#define	INSTR_CALC(dbits, bits, cpu, dividend, divisor, quotient, remainder)
Functions
int32_t	instr_group_3_f6_idiv (struct emu_cpu *c, struct emu_cpu_instruction *i)
int32_t	instr_group_3_f7_idiv (struct emu_cpu *c, struct emu_cpu_instruction *i)

---

Define Documentation

#define INSTR_CALC	(	dbits,
		bits,
		cpu,
		dividend,
		divisor,
		quotient,
		remainder		)

Value:

{\
        if (divisor == 0) \
        { \
                emu_strerror_set(cpu->emu,"div by zero (%i bits)\n",bits); \
                emu_errno_set(cpu->emu,EINVAL); \
                return -1; \
        } \
        INTOF(dbits) q_result = (INTOF(dbits))dividend / (INTOF(bits))divisor; \
        INTOF(dbits) r_result = (INTOF(dbits))dividend % (INTOF(bits))divisor; \
\
        quotient = q_result; \
        remainder = r_result; \
        if ( q_result < max_inttype_borders[bits/8][0][0] || \
                 q_result > max_inttype_borders[bits/8][0][1] ) \
        { \
                emu_strerror_set(cpu->emu,"div quotient larger than intborder (%i bits)\n",bits); \
                emu_errno_set(cpu->emu,EINVAL); \
                return -1; \
        } \
}

---

Function Documentation

int32_t instr_group_3_f6_idiv	(	struct emu_cpu *	c,
		struct emu_cpu_instruction *	i
	)

References ah, al, ax, emu_cpu_instruction::ea, INSTR_CALC, MEM_BYTE_READ, emu_cpu_instruction::mod, emu_cpu_instruction::modrm, emu_cpu::reg16, emu_cpu::reg8, and emu_cpu_instruction::rm.

Referenced by instr_group_3_f6().

int32_t instr_group_3_f7_idiv	(	struct emu_cpu *	c,
		struct emu_cpu_instruction *	i
	)

References ax, DWORD_FROM_WORDS, dx, emu_cpu_instruction::ea, eax, edx, INSTR_CALC, MEM_DWORD_READ, MEM_WORD_READ, emu_cpu_instruction::mod, emu_cpu_instruction::modrm, PREFIX_OPSIZE, emu_cpu_instruction::prefixes, QWORD_FROM_DWORDS, emu_cpu::reg, emu_cpu::reg16, and emu_cpu_instruction::rm.

Referenced by instr_group_3_f7().