gas/

2003-03-21  H.J. Lu  <hongjiu.lu@intel.com>

	PR binutils/4218
	* config/tc-i386.c (match_template): Properly handle 64bit mode
	"xchg %eax, %eax".

gas/testsuite/

2003-03-21  H.J. Lu  <hongjiu.lu@intel.com>

	PR binutils/4218
	* gas/i386/nops.s: Add testcases for nop r/m.
	* gas/i386/x86-64-nops.s: Likewise.

	* gas/i386/x86-64-opcode.s: Add testcases for xchg with %ax,
	%eax and %rax.

	* gas/i386/nops.d: Updated.
	* gas/i386/x86-64-nops.d: Likewise.
	* gas/i386/x86-64-opcode.d: Likewise.

opcodes/

2003-03-21  H.J. Lu  <hongjiu.lu@intel.com>

	PR binutils/4218
	* i386-dis.c (PREGRP38): New.
	(dis386): Use PREGRP38 for 0x90.
	(prefix_user_table): Add PREGRP38.
	(print_insn): Set uses_REPZ_prefix to 1 for pause.
	(NOP_Fixup1): Properly handle REX bits.
	(NOP_Fixup2): Likewise.

	* i386-opc.c (i386_optab): Allow %eax with xchg in 64bit.
	Allow register with nop.

9 files changed, 104 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index ca2f6dd..01ac7bf 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,9 @@
+2003-03-21  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/4218
+	* config/tc-i386.c (match_template): Properly handle 64bit mode
+	"xchg %eax, %eax".
+
 2007-03-21  Anton Ertl  <anton@mips.complang.tuw>
 
 	PR gas/4124
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 63d95fa..c3da74a 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -2621,6 +2621,15 @@ match_template (void)
 	    continue;
 	  break;
 	case 2:
+	  /* xchg %eax, %eax is a special case. It is an aliase for nop
+	     only in 32bit mode and we can use opcode 0x90.  In 64bit
+	     mode, we can't use 0x90 for xchg %eax, %eax since it should
+	     zero-extend %eax to %rax.  */
+	  if (flag_code == CODE_64BIT
+	      && t->base_opcode == 0x90
+	      && i.types [0] == (Acc | Reg32)
+	      && i.types [1] == (Acc | Reg32))
+	    continue;
 	case 3:
 	case 4:
 	  overlap1 = i.types[1] & operand_types[1];
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index e7024ee..48425b1 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,5 +1,18 @@
 2003-03-21  H.J. Lu  <hongjiu.lu@intel.com>
 
+	PR binutils/4218
+	* gas/i386/nops.s: Add testcases for nop r/m.
+	* gas/i386/x86-64-nops.s: Likewise.
+
+	* gas/i386/x86-64-opcode.s: Add testcases for xchg with %ax,
+	%eax and %rax.
+
+	* gas/i386/nops.d: Updated.
+	* gas/i386/x86-64-nops.d: Likewise.
+	* gas/i386/x86-64-opcode.d: Likewise.
+
+2003-03-21  H.J. Lu  <hongjiu.lu@intel.com>
+
 	* gas/i386/i386.exp: Run nops-3.
 
 	* gas/i386/nops-3.d: New file.
diff --git a/gas/testsuite/gas/i386/nops.d b/gas/testsuite/gas/i386/nops.d
index 74eaf86..dc01585 100644
--- a/gas/testsuite/gas/i386/nops.d
+++ b/gas/testsuite/gas/i386/nops.d
@@ -14,4 +14,11 @@ Disassembly of section .text:
 [	 ]*19:[	 ]+0f 1f 84 00 00 00 00 00[	 ]+nopl[ 	]+0x0\(%eax,%eax,1\)
 [	 ]*21:[	 ]+66 0f 1f 84 00 00 00 00 00[	 ]+nopw[ 	]+0x0\(%eax,%eax,1\)
 [	 ]*2a:[	 ]+66 2e 0f 1f 84 00 00 00 00 00[	 ]+nopw[ 	]+%cs:0x0\(%eax,%eax,1\)
+[	 ]*34:[	 ]+0f 1f 00[	 ]+nopl[ 	]+\(%eax\)
+[	 ]*37:[	 ]+0f 1f c0[	 ]+nop[ 	]+%eax
+[	 ]*3a:[	 ]+66 0f 1f c0[	 ]+nop[ 	]+%ax
+[	 ]*3e:[	 ]+0f 1f 00[	 ]+nopl[ 	]+\(%eax\)
+[	 ]*41:[	 ]+66 0f 1f 00[	 ]+nopw[ 	]+\(%eax\)
+[	 ]*45:[	 ]+0f 1f c0[	 ]+nop[ 	]+%eax
+[	 ]*48:[	 ]+66 0f 1f c0[	 ]+nop[ 	]+%ax
 #pass
diff --git a/gas/testsuite/gas/i386/nops.s b/gas/testsuite/gas/i386/nops.s
index e4eec09..9dddb42 100644
--- a/gas/testsuite/gas/i386/nops.s
+++ b/gas/testsuite/gas/i386/nops.s
@@ -9,4 +9,12 @@
 	.byte 0x66, 0x0f, 0x1f, 0x84, 0x0,  0x0, 0x0, 0x0, 0x0
 	.byte 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x0, 0x0, 0x0, 0x0, 0x0
 
+	nop (%eax) 
+	nop %eax
+	nop %ax
+	nopl (%eax) 
+	nopw (%eax) 
+	nopl %eax
+	nopw %ax
+
 	.p2align 4
diff --git a/gas/testsuite/gas/i386/x86-64-nops.d b/gas/testsuite/gas/i386/x86-64-nops.d
index e51c0c1..9163619 100644
--- a/gas/testsuite/gas/i386/x86-64-nops.d
+++ b/gas/testsuite/gas/i386/x86-64-nops.d
@@ -14,4 +14,24 @@ Disassembly of section .text:
 [	 ]*19:[	 ]+0f 1f 84 00 00 00 00 00[	 ]+nopl[ 	]+0x0\(%rax,%rax,1\)
 [	 ]*21:[	 ]+66 0f 1f 84 00 00 00 00 00[	 ]+nopw[ 	]+0x0\(%rax,%rax,1\)
 [	 ]*2a:[	 ]+66 2e 0f 1f 84 00 00 00 00 00[	 ]+nopw[ 	]+%cs:0x0\(%rax,%rax,1\)
+[	 ]*34:[	 ]+0f 1f 00[	 ]+nopl[ 	]+\(%rax\)
+[	 ]*37:[	 ]+48 0f 1f c0[	 ]+nop[ 	]+%rax
+[	 ]*3b:[	 ]+0f 1f c0[	 ]+nop[ 	]+%eax
+[	 ]*3e:[	 ]+66 0f 1f c0[	 ]+nop[ 	]+%ax
+[	 ]*42:[	 ]+48 0f 1f 00[	 ]+nopq[ 	]+\(%rax\)
+[	 ]*46:[	 ]+0f 1f 00[	 ]+nopl[ 	]+\(%rax\)
+[	 ]*49:[	 ]+66 0f 1f 00[	 ]+nopw[ 	]+\(%rax\)
+[	 ]*4d:[	 ]+48 0f 1f c0[	 ]+nop[ 	]+%rax
+[	 ]*51:[	 ]+0f 1f c0[	 ]+nop[ 	]+%eax
+[	 ]*54:[	 ]+66 0f 1f c0[	 ]+nop[ 	]+%ax
+[	 ]*58:[	 ]+41 0f 1f 02[	 ]+nopl[ 	]+\(%r10\)
+[	 ]*5c:[	 ]+49 0f 1f c2[	 ]+nop[ 	]+%r10
+[	 ]*60:[	 ]+41 0f 1f c2[	 ]+nop[ 	]+%r10d
+[	 ]*64:[	 ]+66 41 0f 1f c2[	 ]+nop[ 	]+%r10w
+[	 ]*69:[	 ]+49 0f 1f 02[	 ]+nopq[ 	]+\(%r10\)
+[	 ]*6d:[	 ]+41 0f 1f 02[	 ]+nopl[ 	]+\(%r10\)
+[	 ]*71:[	 ]+66 41 0f 1f 02[	 ]+nopw[ 	]+\(%r10\)
+[	 ]*76:[	 ]+49 0f 1f c2[	 ]+nop[ 	]+%r10
+[	 ]*7a:[	 ]+41 0f 1f c2[	 ]+nop[ 	]+%r10d
+[	 ]*7e:[	 ]+66 41 0f 1f c2[	 ]+nop[ 	]+%r10w
 #pass
diff --git a/gas/testsuite/gas/i386/x86-64-nops.s b/gas/testsuite/gas/i386/x86-64-nops.s
index e4eec09..2268e7f 100644
--- a/gas/testsuite/gas/i386/x86-64-nops.s
+++ b/gas/testsuite/gas/i386/x86-64-nops.s
@@ -9,4 +9,25 @@
 	.byte 0x66, 0x0f, 0x1f, 0x84, 0x0,  0x0, 0x0, 0x0, 0x0
 	.byte 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x0, 0x0, 0x0, 0x0, 0x0
 
+	nop (%rax) 
+	nop %rax
+	nop %eax
+	nop %ax
+	nopq (%rax) 
+	nopl (%rax) 
+	nopw (%rax) 
+	nopq %rax
+	nopl %eax
+	nopw %ax
+	nop (%r10) 
+	nop %r10
+	nop %r10d
+	nop %r10w
+	nopq (%r10) 
+	nopl (%r10) 
+	nopw (%r10) 
+	nopq %r10
+	nopl %r10d
+	nopw %r10w
+
 	.p2align 4
diff --git a/gas/testsuite/gas/i386/x86-64-opcode.d b/gas/testsuite/gas/i386/x86-64-opcode.d
index d3bd17f..126b363 100644
--- a/gas/testsuite/gas/i386/x86-64-opcode.d
+++ b/gas/testsuite/gas/i386/x86-64-opcode.d
@@ -274,6 +274,16 @@ Disassembly of section .text:
 [	 ]*[0-9a-f]+:[	 ]+90[	 ]+nop[	 ]*(#.*)*
 [	 ]*[0-9a-f]+:[	 ]+48 90[	 ]+rex64 nop[	 ]*(#.*)*
 [	 ]*[0-9a-f]+:[	 ]+49 90[	 ]+xchg[	 ]+%rax,%r8[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+41 90[	 ]+xchg[	 ]+%eax,%r8d[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+41 90[	 ]+xchg[	 ]+%eax,%r8d[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+41 91[	 ]+xchg[	 ]+%eax,%r9d[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+41 91[	 ]+xchg[	 ]+%eax,%r9d[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+93[	 ]+xchg[	 ]+%eax,%ebx[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+93[	 ]+xchg[	 ]+%eax,%ebx[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+66 41 90[	 ]+xchg[	 ]+%ax,%r8w[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+66 41 90[	 ]+xchg[	 ]+%ax,%r8w[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+66 41 91[	 ]+xchg[	 ]+%ax,%r9w[	 ]*(#.*)*
+[	 ]*[0-9a-f]+:[	 ]+66 41 91[	 ]+xchg[	 ]+%ax,%r9w[	 ]*(#.*)*
 [	 ]*[0-9a-f]+:[	 ]+48 0f 01 e0[	 ]+smsw[	 ]+%rax[	 ]*(#.*)*
 [	 ]*[0-9a-f]+:[	 ]+0f 01 e0[	 ]+smsw[	 ]+%eax[	 ]*(#.*)*
 [	 ]*[0-9a-f]+:[	 ]+66 0f 01 e0[	 ]+smsw[	 ]+%ax[	 ]*(#.*)*
diff --git a/gas/testsuite/gas/i386/x86-64-opcode.s b/gas/testsuite/gas/i386/x86-64-opcode.s
index e40dc29..dd37342 100644
--- a/gas/testsuite/gas/i386/x86-64-opcode.s
+++ b/gas/testsuite/gas/i386/x86-64-opcode.s
@@ -397,6 +397,16 @@
 	xchg %rax,%rax		      # --  --	 -- --	 90
 	rex64 xchg %rax,%rax	      # --  --	 -- 48	 90
 	xchg %rax,%r8		      # --  --	 -- 49	 90
+	xchg %eax,%r8d		      # --  --	 -- 41	 90
+	xchg %r8d,%eax		      # --  --	 -- 41	 90
+	xchg %eax,%r9d		      # --  --	 -- 41	 91
+	xchg %r9d,%eax		      # --  --	 -- 41	 91
+	xchg %ebx,%eax		      # --  --	 -- 93
+	xchg %eax,%ebx		      # --  --	 -- 93
+	xchg %ax,%r8w		      # --  --	 -- 66 41 90
+	xchg %r8w,%ax		      # --  --	 -- 66 41 90
+	xchg %ax,%r9w		      # --  --	 -- 66 41 91
+	xchg %r9w,%ax		      # --  --	 -- 66 41 91
 
         smsw %rax	              #  --  --	 -- 48	 0F 01 e0
         smsw %eax	              #  --  --	 -- --	 0F 01 e0