ops2.c

针对linux休眠suspend显卡状态保存恢复的一个办法

    START_OF_INSTR();
    FETCH_DECODE_MODRM(mod, rh, rl);
    switch (rh) {
    case 4:
	DECODE_PRINTF("BT\t");
	break;
    case 5:
	DECODE_PRINTF("BTS\t");
	break;
    case 6:
	DECODE_PRINTF("BTR\t");
	break;
    case 7:
	DECODE_PRINTF("BTC\t");
	break;
    default:
	DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
	TRACE_REGS();
	printk("%04x:%04x: %02X%02X ILLEGAL EXTENDED X86 OPCODE EXTENSION!\n",
		M.x86.R_CS, M.x86.R_IP-3,op2, (mod<<6)|(rh<<3)|rl);
	HALT_SYS();
    }
    switch (mod) {
    case 0:
        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
            u32 srcval, mask;
            u8 shift;

            srcoffset = decode_rm00_address(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0x1F;
            srcval = fetch_data_long(srcoffset);
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    switch (rh) {
	    case 5:
		store_data_long(srcoffset, srcval | mask);
		break;
	    case 6:
		store_data_long(srcoffset, srcval & ~mask);
		break;
	    case 7:
		store_data_long(srcoffset, srcval ^ mask);
		break;
	    default:
		break;
	    }
        } else {
            u16 srcval, mask;
            u8 shift;

            srcoffset = decode_rm00_address(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0xF;
            srcval = fetch_data_word(srcoffset);
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    switch (rh) {
	    case 5:
		store_data_word(srcoffset, srcval | mask);
		break;
	    case 6:
		store_data_word(srcoffset, srcval & ~mask);
		break;
	    case 7:
		store_data_word(srcoffset, srcval ^ mask);
		break;
	    default:
		break;
	    }
        }
        break;
    case 1:
        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
            u32 srcval, mask;
            u8 shift;

            srcoffset = decode_rm01_address(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0x1F;
            srcval = fetch_data_long(srcoffset);
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    switch (rh) {
	    case 5:
		store_data_long(srcoffset, srcval | mask);
		break;
	    case 6:
		store_data_long(srcoffset, srcval & ~mask);
		break;
	    case 7:
		store_data_long(srcoffset, srcval ^ mask);
		break;
	    default:
		break;
	    }
        } else {
            u16 srcval, mask;
            u8 shift;

            srcoffset = decode_rm01_address(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0xF;
            srcval = fetch_data_word(srcoffset);
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    switch (rh) {
	    case 5:
		store_data_word(srcoffset, srcval | mask);
		break;
	    case 6:
		store_data_word(srcoffset, srcval & ~mask);
		break;
	    case 7:
		store_data_word(srcoffset, srcval ^ mask);
		break;
	    default:
		break;
	    }
        }
        break;
    case 2:
        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
            u32 srcval, mask;
            u8 shift;

            srcoffset = decode_rm10_address(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0x1F;
            srcval = fetch_data_long(srcoffset);
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    switch (rh) {
	    case 5:
		store_data_long(srcoffset, srcval | mask);
		break;
	    case 6:
		store_data_long(srcoffset, srcval & ~mask);
		break;
	    case 7:
		store_data_long(srcoffset, srcval ^ mask);
		break;
	    default:
		break;
	    }
        } else {
            u16 srcval, mask;
            u8 shift;

            srcoffset = decode_rm10_address(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0xF;
            srcval = fetch_data_word(srcoffset);
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
	    switch (rh) {
	    case 5:
		store_data_word(srcoffset, srcval | mask);
		break;
	    case 6:
		store_data_word(srcoffset, srcval & ~mask);
		break;
	    case 7:
		store_data_word(srcoffset, srcval ^ mask);
		break;
	    default:
		break;
	    }
        }
        break;
    case 3:                     /* register to register */
        if (M.x86.mode & SYSMODE_PREFIX_DATA) {
            u32 *srcreg;
	    u32 mask;
	    u8 shift;

            srcreg = DECODE_RM_LONG_REGISTER(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0x1F;
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
	    switch (rh) {
	    case 5:
		*srcreg |= mask;
		break;
	    case 6:
		*srcreg &= ~mask;
		break;
	    case 7:
		*srcreg ^= mask;
		break;
	    default:
		break;
	    }
        } else {
            u16 *srcreg;
	    u16 mask;
	    u8 shift;

            srcreg = DECODE_RM_WORD_REGISTER(rl);
            DECODE_PRINTF(",");
            shift = fetch_byte_imm();
            TRACE_AND_STEP();
            bit = shift & 0xF;
	    mask = (0x1 << bit);
            CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
	    switch (rh) {
	    case 5:
		*srcreg |= mask;
		break;
	    case 6:
		*srcreg &= ~mask;
		break;
	    case 7:
		*srcreg ^= mask;
		break;
	    default:
		break;
	    }
        }
        break;
    }
    DECODE_CLEAR_SEGOVR();
    END_OF_INSTR();
}

/****************************************************************************
REMARKS:
Handles opcode 0x0f,0xbb
****************************************************************************/
static void x86emuOp2_btc_R(u8 X86EMU_UNUSED(op2))
{
    int mod, rl, rh;
    uint srcoffset;
    int bit,disp;

    START_OF_INSTR();
    DECODE_PRINTF("BTC\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, (u16)(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, (u16)(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, (u16)(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,0xbc
****************************************************************************/
static void x86emuOp2_bsf(u8 X86EMU_UNUSED(op2))
{
    int mod, rl, rh;
    uint srcoffset;

    START_OF_INSTR();
    DECODE_PRINTF("BSF\n");
    FETCH_DECODE_MODRM(mod, rh, rl);
    switch(mod) {
    case 0:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 srcval, *dstreg;

	    srcoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    dstreg = DECODE_RM_LONG_REGISTER(rh);
	    TRACE_AND_STEP();
	    srcval = fetch_data_long(srcoffset);
	    CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
	    for(*dstreg = 0; *dstreg < 32; (*dstreg)++)
		if ((srcval >> *dstreg) & 1) break;
	} else {
	    u16 srcval, *dstreg;

	    srcoffset = decode_rm00_address(rl);
	    DECODE_PRINTF(",");
	    dstreg = DECODE_RM_WORD_REGISTER(rh);
	    TRACE_AND_STEP();
	    srcval = fetch_data_word(srcoffset);
	    CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
	    for(*dstreg = 0; *dstreg < 16; (*dstreg)++)
		if ((srcval >> *dstreg) & 1) break;
	}
	break;
    case 1:
	if (M.x86.mode & SYSMODE_PREFIX_DATA) {
	    u32 srcval, *dstreg;

	    srcoffset = decode_rm01_address(rl);
	    DECODE_PRINTF(",");
	    dstreg = DECODE_RM_LONG_REGISTER(rh);
	    TRACE_AND_STEP();
	    srcval = fetch_data_long(srcoffset);
	    CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
	    for(*dstreg = 0; *dstreg < 32; (*dstreg)++)
		if ((srcval >> *dstreg) & 1) break;
	} else {
	    u16 srcval, *dstreg;

	    srcoffset = deco