Re: [PATCH kvm-unit-tests] realmode: test AAM, XLAT, SALC

[Paolo Bonzini <pbonzini@redhat.com>]

Il 09/05/2013 11:13, Gleb Natapov ha scritto:
> On Thu, May 09, 2013 at 10:53:37AM +0200, Paolo Bonzini wrote:
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> ---
>>  x86/realmode.c | 40 ++++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 40 insertions(+)
>>
>> diff --git a/x86/realmode.c b/x86/realmode.c
>> index 91c93a9..35ace08 100644
>> --- a/x86/realmode.c
>> +++ b/x86/realmode.c
>> @@ -1391,6 +1391,43 @@ static void test_aad(void)
>>      report("aad", R_AX, outregs.eax == 0x123400d4);
>>  }
>>  
>> +static void test_aam(void)
>> +{
>> +    MK_INSN(aam, "aam");
>> +
>> +    inregs.eax = 0x76543210;
>> +    exec_in_big_real_mode(&insn_aam);
>> +    report("aam", R_AX, outregs.eax == 0x76540106);
>> +}
>> +
>> +static void test_xlat(void)
>> +{
>> +    MK_INSN(xlat, "xlat");
>> +    u8 table[256];
>> +    int i;
>> +
>> +    for (i = 0; i < 256; i++) {
>> +        table[i] = i + 1;
>> +    }
>> +
>> +    inregs.eax = 0x89abcdef;
>> +    inregs.ebx = (u32)table;
>> +    exec_in_big_real_mode(&insn_xlat);
>> +    report("xlat", R_AX, outregs.eax == 0x89abcdf0);
>> +}
>> +
>> +static void test_salc(void)
>> +{
>> +    MK_INSN(clc_salc, "clc; .byte 0xd6");
>> +    MK_INSN(stc_salc, "stc; .byte 0xd6");
> Heh, who uses that?

Some real-mode programs do.  Plus, the "N" in the opcode table looked
really bad. :)

Paolo

>> +
>> +    inregs.eax = 0x12345678;
>> +    exec_in_big_real_mode(&insn_clc_salc);
>> +    report("salc (1)", R_AX, outregs.eax == 0x12345600);
>> +    exec_in_big_real_mode(&insn_stc_salc);
>> +    report("salc (2)", R_AX, outregs.eax == 0x123456ff);
>> +}
>> +
>>  static void test_fninit(void)
>>  {
>>  	u16 fcw = -1, fsw = -1;
>> @@ -1443,6 +1480,9 @@ void realmode_start(void)
>>  	test_movzx_movsx();
>>  	test_bswap();
>>  	test_aad();
>> +	test_aam();
>> +	test_xlat();
>> +	test_salc();
>>  	test_fninit();
>>  
>>  	exit(0);
>> -- 
>> 1.8.1.4
> 
> --
> 			Gleb.
> --
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