ops2.c

来自「适合KS8695X」· C语言 代码 · 共 2,397 行 · 第 1/5 页

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	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shld_word(destval,*shiftreg,shift);
	    store_data_word(destoffset, destval);
	}
	break;
    case 2:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 destval;
	    u32 *shiftreg;

	    destoffset = decode_rm10_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_long(destoffset);
	    destval = shld_long(destval,*shiftreg,shift);
	    store_data_long(destoffset, destval);
	} else {
	    u16 destval;
	    u16 *shiftreg;

	    destoffset = decode_rm10_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shld_word(destval,*shiftreg,shift);
	    store_data_word(destoffset, destval);
	}
	break;
    case 3:                     /* register to register */
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 *destreg,*shiftreg;

	    destreg = DECODE_RM_LONG_REGISTER(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    *destreg = shld_long(*destreg,*shiftreg,shift);
	} else {
	    u16 *destreg,*shiftreg;

	    destreg = DECODE_RM_WORD_REGISTER(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    *destreg = shld_word(*destreg,*shiftreg,shift);
	}
	break;
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x0f,0xa5
****************************************************************************/
void x86emuOp2_shld_CL(u8 X86EMU_UNUSED(op2))
{
    int mod, rl, rh;
    uint destoffset;

    START_OF_INSTR();
    DECODE_PRINTF("SHLD\t");
    FETCH_DECODE_MODRM(mod, rh, rl);
    switch (mod) {
    case 0:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 destval;
	    u32 *shiftreg;

	    destoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    destval = fetch_data_long(destoffset);
	    destval = shld_long(destval,*shiftreg,M.x86.R_CL);
	    store_data_long(destoffset, destval);
	} else {
	    u16 destval;
	    u16 *shiftreg;

	    destoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shld_word(destval,*shiftreg,M.x86.R_CL);
	    store_data_word(destoffset, destval);
	}
	break;
    case 1:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 destval;
	    u32 *shiftreg;

	    destoffset = decode_rm01_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    destval = fetch_data_long(destoffset);
	    destval = shld_long(destval,*shiftreg,M.x86.R_CL);
	    store_data_long(destoffset, destval);
	} else {
	    u16 destval;
	    u16 *shiftreg;

	    destoffset = decode_rm01_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shld_word(destval,*shiftreg,M.x86.R_CL);
	    store_data_word(destoffset, destval);
	}
	break;
    case 2:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 destval;
	    u32 *shiftreg;

	    destoffset = decode_rm10_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    destval = fetch_data_long(destoffset);
	    destval = shld_long(destval,*shiftreg,M.x86.R_CL);
	    store_data_long(destoffset, destval);
	} else {
	    u16 destval;
	    u16 *shiftreg;

	    destoffset = decode_rm10_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shld_word(destval,*shiftreg,M.x86.R_CL);
	    store_data_word(destoffset, destval);
	}
	break;
    case 3:                     /* register to register */
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 *destreg,*shiftreg;

	    destreg = DECODE_RM_LONG_REGISTER(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    *destreg = shld_long(*destreg,*shiftreg,M.x86.R_CL);
	} else {
	    u16 *destreg,*shiftreg;

	    destreg = DECODE_RM_WORD_REGISTER(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",CL\n");
	    TRACE_AND_STEP();
	    *destreg = shld_word(*destreg,*shiftreg,M.x86.R_CL);
	}
	break;
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x0f,0xa8
****************************************************************************/
void x86emuOp2_push_GS(u8 X86EMU_UNUSED(op2))
{
    START_OF_INSTR();
    DECODE_PRINTF("PUSH\tGS\n");
    TRACE_AND_STEP();
    push_word(M.x86.R_GS);
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x0f,0xa9
****************************************************************************/
void x86emuOp2_pop_GS(u8 X86EMU_UNUSED(op2))
{
    START_OF_INSTR();
    DECODE_PRINTF("POP\tGS\n");
    TRACE_AND_STEP();
    M.x86.R_GS = pop_word();
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x0f,0xaa
****************************************************************************/
void x86emuOp2_bts_R(u8 X86EMU_UNUSED(op2))
{
    int mod, rl, rh;
    uint srcoffset;
    int bit,disp;

    START_OF_INSTR();
    DECODE_PRINTF("BTS\t");
    FETCH_DECODE_MODRM(mod, rh, rl);
    switch (mod) {
    case 0:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 srcval,mask;
	    u32 *shiftreg;

	    srcoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    TRACE_AND_STEP();
	    bit = *shiftreg & 0x1F;
	    disp = (s16)*shiftreg >> 5;
	    srcval = fetch_data_long(srcoffset+disp);
	    mask = (0x1 << bit);
	    CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    store_data_long(srcoffset+disp, srcval | mask);
	} else {
	    u16 srcval,mask;
	    u16 *shiftreg;

	    srcoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    TRACE_AND_STEP();
	    bit = *shiftreg & 0xF;
	    disp = (s16)*shiftreg >> 4;
	    srcval = fetch_data_word(srcoffset+disp);
			mask = (u16)(0x1 << bit);
	    CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    store_data_word(srcoffset+disp, srcval | mask);
	}
	break;
    case 1:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 srcval,mask;
	    u32 *shiftreg;

	    srcoffset = decode_rm01_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    TRACE_AND_STEP();
	    bit = *shiftreg & 0x1F;
	    disp = (s16)*shiftreg >> 5;
	    srcval = fetch_data_long(srcoffset+disp);
	    mask = (0x1 << bit);
	    CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    store_data_long(srcoffset+disp, srcval | mask);
	} else {
	    u16 srcval,mask;
	    u16 *shiftreg;

	    srcoffset = decode_rm01_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    TRACE_AND_STEP();
	    bit = *shiftreg & 0xF;
	    disp = (s16)*shiftreg >> 4;
	    srcval = fetch_data_word(srcoffset+disp);
			mask = (u16)(0x1 << bit);
	    CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    store_data_word(srcoffset+disp, srcval | mask);
	}
	break;
    case 2:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 srcval,mask;
	    u32 *shiftreg;

	    srcoffset = decode_rm10_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    TRACE_AND_STEP();
	    bit = *shiftreg & 0x1F;
	    disp = (s16)*shiftreg >> 5;
	    srcval = fetch_data_long(srcoffset+disp);
	    mask = (0x1 << bit);
	    CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    store_data_long(srcoffset+disp, srcval | mask);
	} else {
	    u16 srcval,mask;
	    u16 *shiftreg;

			srcoffset = decode_rm10_address(rl);
			DECODE_PRINTF(",");
			shiftreg = DECODE_RM_WORD_REGISTER(rh);
			TRACE_AND_STEP();
			bit = *shiftreg & 0xF;
			disp = (s16)*shiftreg >> 4;
			srcval = fetch_data_word(srcoffset+disp);
			mask = (u16)(0x1 << bit);
			CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
			store_data_word(srcoffset+disp, srcval | mask);
		}
		break;
	case 3:                     /* register to register */
		if (M.x86.mode & SYSMODE_PREFIX_DATA) {
			u32 *srcreg,*shiftreg;
			u32 mask;

			srcreg = DECODE_RM_LONG_REGISTER(rl);
			DECODE_PRINTF(",");
			shiftreg = DECODE_RM_LONG_REGISTER(rh);
			TRACE_AND_STEP();
			bit = *shiftreg & 0x1F;
			mask = (0x1 << bit);
			CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
			*srcreg |= mask;
		} else {
			u16 *srcreg,*shiftreg;
			u16 mask;

			srcreg = DECODE_RM_WORD_REGISTER(rl);
			DECODE_PRINTF(",");
			shiftreg = DECODE_RM_WORD_REGISTER(rh);
			TRACE_AND_STEP();
			bit = *shiftreg & 0xF;
			mask = (u16)(0x1 << bit);
	    CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
	    *srcreg |= mask;
	}
	break;
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x0f,0xac
****************************************************************************/
void x86emuOp2_shrd_IMM(u8 X86EMU_UNUSED(op2))
{
    int mod, rl, rh;
    uint destoffset;
	u8 shift;

    START_OF_INSTR();
    DECODE_PRINTF("SHLD\t");
    FETCH_DECODE_MODRM(mod, rh, rl);
    switch (mod) {
    case 0:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 destval;
	    u32 *shiftreg;

	    destoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_long(destoffset);
	    destval = shrd_long(destval,*shiftreg,shift);
	    store_data_long(destoffset, destval);
	} else {
	    u16 destval;
	    u16 *shiftreg;

	    destoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shrd_word(destval,*shiftreg,shift);
	    store_data_word(destoffset, destval);
	}
	break;
    case 1:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 destval;
	    u32 *shiftreg;

	    destoffset = decode_rm01_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_long(destoffset);
	    destval = shrd_long(destval,*shiftreg,shift);
	    store_data_long(destoffset, destval);
	} else {
	    u16 destval;
	    u16 *shiftreg;

	    destoffset = decode_rm01_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shrd_word(destval,*shiftreg,shift);
	    store_data_word(destoffset, destval);
	}
	break;
    case 2:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 destval;
	    u32 *shiftreg;

	    destoffset = decode_rm10_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_long(destoffset);
	    destval = shrd_long(destval,*shiftreg,shift);
	    store_data_long(destoffset, destval);
	} else {
	    u16 destval;
	    u16 *shiftreg;

	    destoffset = decode_rm10_address(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_WORD_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    destval = fetch_data_word(destoffset);
	    destval = shrd_word(destval,*shiftreg,shift);
	    store_data_word(destoffset, destval);
	}
	break;
    case 3:                     /* register to register */
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 *destreg,*shiftreg;

	    destreg = DECODE_RM_LONG_REGISTER(rl);
	    DECODE_PRINTF(",");
	    shiftreg = DECODE_RM_LONG_REGISTER(rh);
	    DECODE_PRINTF(",");
	    shift = fetch_byte_imm();
	    DECODE_PRINTF2("%d\n", shift);
	    TRACE_AND_STEP();
	    *destreg = shrd_long(*destreg,*shiftreg,shift);
	} else {
	    u16 *destreg,*shiftreg;
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ops2.c - 源码说明

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