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x86: re-work operand swapping for XOP shift/rotate insns

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There's no need for custom operand handling here, except for the VEX.W
controlled operand swapping.
This commit is contained in:
Jan Beulich
2020-07-08 11:03:07 +02:00
parent 93abb1468e
commit e6123d0c61
2 changed files with 32 additions and 74 deletions
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8
opcodes/ChangeLog
View File

@ -1,3 +1,11 @@
2020-07-08 Jan Beulich <jbeulich@suse.com>
* i386-dis.c (OP_Vex_2src_1, OP_Vex_2src_2, Vex_2src_1,
Vex_2src_2): Delete.
(OP_VexW, VexW): New.
(xop_table): Use EXx for rotates by immediate. Use EXx and VexW
for shifts and rotates by register.
2020-07-08 Jan Beulich <jbeulich@suse.com>
* i386-dis.c (OP_EX_VexImmW, OP_XMM_VexW, EXVexImmW, XMVexW,

98
opcodes/i386-dis.c
View File

@ -88,6 +88,7 @@ static void OP_MS (int, int);
static void OP_XS (int, int);
static void OP_M (int, int);
static void OP_VEX (int, int);
static void OP_VexW (int, int);
static void OP_EX_Vex (int, int);
static void OP_XMM_Vex (int, int);
static void OP_Rounding (int, int);
@ -119,8 +120,6 @@ static void FXSAVE_Fixup (int, int);
static void PCMPESTR_Fixup (int, int);
static void OP_LWPCB_E (int, int);
static void OP_LWP_E (int, int);
static void OP_Vex_2src_1 (int, int);
static void OP_Vex_2src_2 (int, int);
static void MOVBE_Fixup (int, int);
static void MOVSXD_Fixup (int, int);
@ -410,10 +409,9 @@ fetch_data (struct disassemble_info *info, bfd_byte *addr)
#define CMP { CMP_Fixup, 0 }
#define XMM0 { XMM_Fixup, 0 }
#define FXSAVE { FXSAVE_Fixup, 0 }
#define Vex_2src_1 { OP_Vex_2src_1, 0 }
#define Vex_2src_2 { OP_Vex_2src_2, 0 }
#define Vex { OP_VEX, vex_mode }
#define VexW { OP_VexW, vex_mode }
#define VexScalar { OP_VEX, vex_scalar_mode }
#define VexGatherQ { OP_VEX, vex_vsib_q_w_dq_mode }
#define Vex128 { OP_VEX, vex128_mode }
@ -7629,10 +7627,10 @@ static const struct dis386 xop_table[][256] = {
{ Bad_Opcode },
{ Bad_Opcode },
/* c0 */
{ "vprotb", { XM, Vex_2src_1, Ib }, 0 },
{ "vprotw", { XM, Vex_2src_1, Ib }, 0 },
{ "vprotd", { XM, Vex_2src_1, Ib }, 0 },
{ "vprotq", { XM, Vex_2src_1, Ib }, 0 },
{ "vprotb", { XM, EXx, Ib }, 0 },
{ "vprotw", { XM, EXx, Ib }, 0 },
{ "vprotd", { XM, EXx, Ib }, 0 },
{ "vprotq", { XM, EXx, Ib }, 0 },
{ Bad_Opcode },
{ Bad_Opcode },
{ Bad_Opcode },
@ -7866,19 +7864,19 @@ static const struct dis386 xop_table[][256] = {
{ Bad_Opcode },
{ Bad_Opcode },
/* 90 */
{ "vprotb", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vprotw", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vprotd", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vprotq", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshlb", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshlw", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshld", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshlq", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vprotb", { XM, EXx, VexW }, 0 },
{ "vprotw", { XM, EXx, VexW }, 0 },
{ "vprotd", { XM, EXx, VexW }, 0 },
{ "vprotq", { XM, EXx, VexW }, 0 },
{ "vpshlb", { XM, EXx, VexW }, 0 },
{ "vpshlw", { XM, EXx, VexW }, 0 },
{ "vpshld", { XM, EXx, VexW }, 0 },
{ "vpshlq", { XM, EXx, VexW }, 0 },
/* 98 */
{ "vpshab", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshaw", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshad", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshaq", { XM, Vex_2src_1, Vex_2src_2 }, 0 },
{ "vpshab", { XM, EXx, VexW }, 0 },
{ "vpshaw", { XM, EXx, VexW }, 0 },
{ "vpshad", { XM, EXx, VexW }, 0 },
{ "vpshaq", { XM, EXx, VexW }, 0 },
{ Bad_Opcode },
{ Bad_Opcode },
{ Bad_Opcode },
@ -15850,64 +15848,16 @@ OP_VEX (int bytemode, int sizeflag ATTRIBUTE_UNUSED)
}
static void
OP_Vex_2src (int bytemode, int sizeflag)
OP_VexW (int bytemode, int sizeflag)
{
if (modrm.mod == 3)
{
int reg = modrm.rm;
USED_REX (REX_B);
if (rex & REX_B)
reg += 8;
oappend (names_xmm[reg]);
}
else
{
if (intel_syntax
&& (bytemode == v_mode || bytemode == v_swap_mode))
{
bytemode = (prefixes & PREFIX_DATA) ? x_mode : q_mode;
used_prefixes |= (prefixes & PREFIX_DATA);
}
OP_E (bytemode, sizeflag);
}
}
static void
OP_Vex_2src_1 (int bytemode, int sizeflag)
{
if (modrm.mod == 3)
{
/* Skip mod/rm byte. */
MODRM_CHECK;
codep++;
}
OP_VEX (bytemode, sizeflag);
if (vex.w)
{
unsigned int reg = vex.register_specifier;
vex.register_specifier = 0;
if (address_mode != mode_64bit)
reg &= 7;
oappend (names_xmm[reg]);
}
else
OP_Vex_2src (bytemode, sizeflag);
}
static void
OP_Vex_2src_2 (int bytemode, int sizeflag)
{
if (vex.w)
OP_Vex_2src (bytemode, sizeflag);
else
{
unsigned int reg = vex.register_specifier;
vex.register_specifier = 0;
if (address_mode != mode_64bit)
reg &= 7;
oappend (names_xmm[reg]);
/* Swap 2nd and 3rd operands. */
strcpy (scratchbuf, op_out[2]);
strcpy (op_out[2], op_out[1]);
strcpy (op_out[1], scratchbuf);
}
}