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zydis
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Added compressed disp8 calculation for MVEX instructions

This commit is contained in:
flobernd 2017-06-22 19:39:43 +02:00
parent 76f0bcf00d
commit b9c43d83a7
1 changed files with 65 additions and 0 deletions
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65
src/Decoder.c
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@ -2597,6 +2597,71 @@ static void ZydisSetAVXInformation(ZydisDecoderContext* context,
const ZydisInstructionDefinitionMVEX* def =
(const ZydisInstructionDefinitionMVEX*)definition;
// Compressed disp8 scale
info->avx.compressedDisp8Scale = 1;
switch (def->functionality)
{
case ZYDIS_MVEX_FUNC_INVALID:
case ZYDIS_MVEX_FUNC_RC:
case ZYDIS_MVEX_FUNC_SAE:
case ZYDIS_MVEX_FUNC_SWIZZLE_32:
case ZYDIS_MVEX_FUNC_SWIZZLE_64:
// Nothing to do here
break;
case ZYDIS_MVEX_FUNC_SF_32:
case ZYDIS_MVEX_FUNC_UF_32:
{
static const uint8_t lookup[8] =
{
64, 4, 16, 32, 16, 16, 32, 32
};
ZYDIS_ASSERT(info->details.mvex.SSS < ZYDIS_ARRAY_SIZE(lookup));
info->avx.compressedDisp8Scale = lookup[info->details.mvex.SSS];
break;
}
case ZYDIS_MVEX_FUNC_SI_32:
case ZYDIS_MVEX_FUNC_UI_32:
{
static const uint8_t lookup[8] =
{
64, 4, 16, 0, 16, 16, 32, 32
};
ZYDIS_ASSERT(info->details.mvex.SSS < ZYDIS_ARRAY_SIZE(lookup));
info->avx.compressedDisp8Scale = lookup[info->details.mvex.SSS];
break;
}
case ZYDIS_MVEX_FUNC_SF_64:
case ZYDIS_MVEX_FUNC_UF_64:
case ZYDIS_MVEX_FUNC_SI_64:
case ZYDIS_MVEX_FUNC_UI_64:
{
static const uint8_t lookup[3] =
{
64, 8, 32
};
ZYDIS_ASSERT(info->details.mvex.SSS < ZYDIS_ARRAY_SIZE(lookup));
info->avx.compressedDisp8Scale = lookup[info->details.mvex.SSS];
break;
}
case ZYDIS_MVEX_FUNC_DF_32:
case ZYDIS_MVEX_FUNC_DI_32:
{
static const uint8_t lookup[8] =
{
64, 0, 0, 32, 16, 16, 32, 32
};
ZYDIS_ASSERT(info->details.mvex.SSS < ZYDIS_ARRAY_SIZE(lookup));
info->avx.compressedDisp8Scale = lookup[info->details.mvex.SSS];
break;
}
case ZYDIS_MVEX_FUNC_DF_64:
case ZYDIS_MVEX_FUNC_DI_64:
info->avx.compressedDisp8Scale = 64;
break;
default:
ZYDIS_UNREACHABLE;
}
// Rounding mode, sae, swizzle, convert
context->mvex.functionality = def->functionality;
switch (def->functionality)