diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2006-06-12 18:55:44 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2006-06-12 18:55:44 +0000 |
| commit | 46e883c5a969e151f282e0bf555cbd27bf10b66e (patch) | |
| tree | 414a85d371f1eab1fbb2f9229bdb6123c1c72b74 /gas | |
| parent | 4e9d3b813b857193778390d2a0f56000215bbab0 (diff) | |
| download | binutils-gdb-46e883c5a969e151f282e0bf555cbd27bf10b66e.tar.gz | |
gas/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* config/tc-i386.c (process_suffix): Don't add rex64 for
"xchg %rax,%rax".
gas/testsuite/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* gas/i386/opcode.s: Add "xchg %ax,%ax".
* gas/i386/opcode.d: Updated.
* gas/i386/x86-64-opcode.s: Add xchg %ax,%ax, xchg %eax,%eax,
xchg %rax,%rax, rex64 xchg %rax,%rax and xchg %rax,%r8.
* gas/i386/x86-64-opcode.d: Updated.
include/opcode/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* i386.h (i386_optab): Update comment for 64bit NOP.
opcodes/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* i386-dis.c (NOP_Fixup): Removed.
(NOP_Fixup1): New.
(NOP_Fixup2): Likewise.
(dis386): Use NOP_Fixup1 and NOP_Fixup2 on 0x90.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/ChangeLog | 5 | ||||
| -rw-r--r-- | gas/config/tc-i386.c | 10 | ||||
| -rw-r--r-- | gas/testsuite/ChangeLog | 9 | ||||
| -rw-r--r-- | gas/testsuite/gas/i386/opcode.d | 1 | ||||
| -rw-r--r-- | gas/testsuite/gas/i386/opcode.s | 2 | ||||
| -rw-r--r-- | gas/testsuite/gas/i386/x86-64-opcode.d | 9 | ||||
| -rw-r--r-- | gas/testsuite/gas/i386/x86-64-opcode.s | 8 |
7 files changed, 40 insertions, 4 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index a225bb09aa7..72942724ea5 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,8 @@ +2006-06-12 H.J. Lu <hongjiu.lu@intel.com> + + * config/tc-i386.c (process_suffix): Don't add rex64 for + "xchg %rax,%rax". + 2006-06-09 Thiemo Seufer <ths@mips.com> * config/tc-mips.c (mips_ip): Maintain argument count. diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 694618f06c0..4a469088ce6 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -2615,7 +2615,15 @@ process_suffix (void) if (i.suffix == QWORD_MNEM_SUFFIX && flag_code == CODE_64BIT && (i.tm.opcode_modifier & NoRex64) == 0) - i.rex |= REX_MODE64; + { + /* Special case for xchg %rax,%rax. It is NOP and doesn't + need rex64. */ + if (i.operands != 2 + || i.types [0] != (Acc | Reg64) + || i.types [1] != (Acc | Reg64) + || strcmp (i.tm.name, "xchg") != 0) + i.rex |= REX_MODE64; + } /* Size floating point instruction. */ if (i.suffix == LONG_MNEM_SUFFIX) diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog index 1fd5057499b..2b16921e0bd 100644 --- a/gas/testsuite/ChangeLog +++ b/gas/testsuite/ChangeLog @@ -1,3 +1,12 @@ +2006-06-12 H.J. Lu <hongjiu.lu@intel.com> + + * gas/i386/opcode.s: Add "xchg %ax,%ax". + * gas/i386/opcode.d: Updated. + + * gas/i386/x86-64-opcode.s: Add xchg %ax,%ax, xchg %eax,%eax, + xchg %rax,%rax, rex64 xchg %rax,%rax and xchg %rax,%r8. + * gas/i386/x86-64-opcode.d: Updated. + 2006-06-09 Thiemo Seufer <ths@mips.com> Nigel Stephens <nigel@mips.com> diff --git a/gas/testsuite/gas/i386/opcode.d b/gas/testsuite/gas/i386/opcode.d index 808ddc5371a..fa58807c5ef 100644 --- a/gas/testsuite/gas/i386/opcode.d +++ b/gas/testsuite/gas/i386/opcode.d @@ -572,4 +572,5 @@ Disassembly of section .text: 9b7: 66 0f bd 90 90 90 90 90 [ ]*bsr 0x90909090\(%eax\),%dx 9bf: 66 0f be 90 90 90 90 90 [ ]*movsbw 0x90909090\(%eax\),%dx 9c7: 66 0f c1 90 90 90 90 90 [ ]*xadd %dx,0x90909090\(%eax\) + 9cf: 66 90 [ ]*xchg %ax,%ax \.\.\. diff --git a/gas/testsuite/gas/i386/opcode.s b/gas/testsuite/gas/i386/opcode.s index 8d7cd050f16..a03ce13099f 100644 --- a/gas/testsuite/gas/i386/opcode.s +++ b/gas/testsuite/gas/i386/opcode.s @@ -566,5 +566,7 @@ foo: movsbw 0x90909090(%eax),%dx xadd %dx,0x90909090(%eax) + xchg %ax,%ax + # Force a good alignment. .p2align 4,0 diff --git a/gas/testsuite/gas/i386/x86-64-opcode.d b/gas/testsuite/gas/i386/x86-64-opcode.d index 13d58be1bdb..f6427d4e00d 100644 --- a/gas/testsuite/gas/i386/x86-64-opcode.d +++ b/gas/testsuite/gas/i386/x86-64-opcode.d @@ -266,6 +266,9 @@ Disassembly of section .text: [ ]*[0-9a-f]+:[ ]+e6 00[ ]+out[ ]+%al,\$0[x0]*[ ]*(#.*)* [ ]*[0-9a-f]+:[ ]+66 e7 00[ ]+out[ ]+%ax,\$0[x0]*[ ]*(#.*)* [ ]*[0-9a-f]+:[ ]+e7 00[ ]+out[ ]+%eax,\$0[x0]*[ ]*(#.*)* -[ ]*[0-9a-f]+:[ ]+00 00[ ]+.* -[ ]*[0-9a-f]+:[ ]+00 00[ ]+.* -[ *]... +[ ]*[0-9a-f]+:[ ]+66 90[ ]+xchg[ ]+%ax,%ax[ ]*(#.*)* +[ ]*[0-9a-f]+:[ ]+87 c0[ ]+xchg[ ]+%eax,%eax[ ]*(#.*)* +[ ]*[0-9a-f]+:[ ]+90[ ]+nop[ ]*(#.*)* +[ ]*[0-9a-f]+:[ ]+48 90[ ]+rex64 nop[ ]*(#.*)* +[ ]*[0-9a-f]+:[ ]+49 90[ ]+xchg[ ]+%rax,%r8[ ]*(#.*)* +#pass diff --git a/gas/testsuite/gas/i386/x86-64-opcode.s b/gas/testsuite/gas/i386/x86-64-opcode.s index 8b132b39046..8d3de00a8e6 100644 --- a/gas/testsuite/gas/i386/x86-64-opcode.s +++ b/gas/testsuite/gas/i386/x86-64-opcode.s @@ -387,4 +387,12 @@ # IN + + + xchg %ax,%ax # 66 -- -- -- 90 + xchg %eax,%eax # -- -- -- -- 87 C0 + xchg %rax,%rax # -- -- -- -- 90 + rex64 xchg %rax,%rax # 48 -- -- -- 90 + xchg %rax,%r8 # -- -- -- 49 90 + .p2align 4,0 |