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| author | Michael Meissner <gnu@the-meissners.org> | 2006-10-23 22:53:29 +0000 |
|---|---|---|
| committer | Michael Meissner <gnu@the-meissners.org> | 2006-10-23 22:53:29 +0000 |
| commit | 7918206c559f06d25e8fdd6894cfc3000f1cb22e (patch) | |
| tree | 868bfcdf63ba0b360547e2ccefd1d1a925d29baf /opcodes | |
| parent | a3ffa599fe54e0e5396f1617b7bc1c391055a1b7 (diff) | |
| download | gdb-7918206c559f06d25e8fdd6894cfc3000f1cb22e.zip gdb-7918206c559f06d25e8fdd6894cfc3000f1cb22e.tar.gz gdb-7918206c559f06d25e8fdd6894cfc3000f1cb22e.tar.bz2 | |
Fix AMDFAM10 POPCNT instruction
Diffstat (limited to 'opcodes')
| -rw-r--r-- | opcodes/ChangeLog | 7 | ||||
| -rw-r--r-- | opcodes/i386-dis.c | 18 |
2 files changed, 21 insertions, 4 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 554a4cc..3173ec3 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -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 diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c index 44625bb..c1e67c4 100644 --- a/opcodes/i386-dis.c +++ b/opcodes/i386-dis.c @@ -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; |