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Fix AMDFAM10 POPCNT instruction

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Michael Meissner
2006-10-23 22:53:29 +00:00
parent a3ffa599fe
commit 7918206c55
9 changed files with 63 additions and 31 deletions
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7
opcodes/ChangeLog
View File

@@ -1,3 +1,10 @@
2006-10-23 Dwarakanath Rajagopal <dwarak.rajagopal@amd.com>
* i386-dis.c (dis386): Add support for the change in POPCNT opcode in
amdfam10 architecture.
(PREGRP37): NEW.
(print_insn): Disallow REP prefix for POPCNT.
2006-10-20 Andrew Stubbs <andrew.stubbs@st.com>
* sh-dis.c (print_insn_sh): Remove 0x from output to prevent GDB

18
opcodes/i386-dis.c
View File

@@ -471,6 +471,8 @@ fetch_data (struct disassemble_info *info, bfd_byte *addr)
#define PREGRP34 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 34, NULL, 0, NULL, 0
#define PREGRP35 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 35, NULL, 0, NULL, 0
#define PREGRP36 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 36, NULL, 0, NULL, 0
#define PREGRP37 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 37, NULL, 0, NULL, 0
#define X86_64_0 NULL, NULL, X86_64_SPECIAL, NULL, 0, NULL, 0, NULL, 0
@@ -1028,7 +1030,7 @@ static const struct dis386 dis386_twobyte[] = {
{ "movz{bR|x|bR|x}", Gv, Eb, XX, XX },
{ "movz{wR|x|wR|x}", Gv, Ew, XX, XX }, /* yes, there really is movzww ! */
/* b8 */
{ "popcntS", Gv, Ev, XX, XX },
{ PREGRP37 },
{ "ud2b", XX, XX, XX, XX },
{ GRP8 },
{ "btcS", Ev, Gv, XX, XX },
@@ -1820,6 +1822,13 @@ static const struct dis386 prefix_user_table[][4] = {
{ "(bad)", XX, XX, XX, XX },
},
/* PREGRP37 */
{
{ "(bad)", XX, XX, XX, XX },
{ "popcntS",Gv, Ev, XX, XX },
{ "(bad)", XX, XX, XX, XX },
{ "(bad)", XX, XX, XX, XX },
},
};
static const struct dis386 x86_64_table[][2] = {
@@ -2827,13 +2836,14 @@ print_insn (bfd_vma pc, disassemble_info *info)
uses_LOCK_prefix = 0;
}
/*"lzcnt"=0xBD is the only non-sse instruction which uses F3 in the opcode without any "rep(z|nz)"*/
if (!uses_SSE_prefix && (prefixes & PREFIX_REPZ) && *codep !=0xBD)
/*"lzcnt"=0xBD and "popcnt"=0xB8 are the only two non-sse
instruction which uses F3 in the opcode without any "rep(z|nz)"*/
if (!uses_SSE_prefix && (prefixes & PREFIX_REPZ) && *codep != 0xBD && *codep != 0xB8)
{
oappend ("repz ");
used_prefixes |= PREFIX_REPZ;
}
if (!uses_SSE_prefix && (prefixes & PREFIX_REPNZ) && *codep !=0xBD)
if (!uses_SSE_prefix && (prefixes & PREFIX_REPNZ) && *codep != 0xBD && *codep != 0xB8)
{
oappend ("repnz ");
used_prefixes |= PREFIX_REPNZ;