PATCH: Support Prescott New Instructions
H. J. Lu
hjl@lucon.org
Fri Jun 20 20:55:00 GMT 2003
This patch supports PNI:
http://cedar.intel.com/cgi-bin/ids.dll/content/content.jsp?cntKey=Generic%20Editorial::devguide_PresNewInstTech&cntType=IDS_EDITORIAL
H.J.
-------------- next part --------------
gas/
2003-05-05 H.J. Lu <hongjiu.lu@intel.com>
* gas/config/tc-i386.c (md_assemble): Support Intel Precott New
Instructions.
* gas/config/tc-i386.h (CpuPNI): New.
(CpuUnknownFlags): Add CpuPNI.
gas/testsuite/
2003-05-05 H.J. Lu <hongjiu.lu@intel.com>
* gas/i386/i386.exp: Add prescott.
* gas/i386/prescott.d: New file.
* gas/i386/prescott.s: Likewise.
include/opcode/
2003-05-05 H.J. Lu <hongjiu.lu@intel.com>
* i386.h (i386_optab): Support Intel Precott New Instructions.
opcodes/
2003-05-05 H.J. Lu <hongjiu.lu@intel.com>
* i386-dis.c (PNI_Fixup): New. Fix up "mwait" and "monitor" in
Intel Precott New Instructions.
(PREGRP27): New. Added for "addsubpd" and "addsubps".
(PREGRP28): New. Added for "haddpd" and "haddps".
(PREGRP29): New. Added for "hsubpd" and "hsubps".
(PREGRP30): New. Added for "movsldup" and "movddup".
(PREGRP31): New. Added for "movshdup" and "movhpd".
(PREGRP32): New. Added for "lddqu".
(dis386_twobyte): Use PREGRP30 to replace the "movlpX" entry.
Use PREGRP31 to replace the "movhpX" entry. Use PREGRP28 for
entry 0x7c. Use PREGRP29 for entry 0x7d. Use PREGRP27 for
entry 0xd0. Use PREGRP32 for entry 0xf0.
(twobyte_has_modrm): Updated.
(twobyte_uses_SSE_prefix): Likewise.
(grps): Use PNI_Fixup in the "sidtQ" entry.
(prefix_user_table): Add PREGRP27, PREGRP28, PREGRP29, PREGRP30,
PREGRP31 and PREGRP32.
(float_mem): Use "fisttp{l||l|}" in entry 1 in opcode 0xdb.
Use "fisttpll" in entry 1 in opcode 0xdd.
Use "fisttp" in entry 1 in opcode 0xdf.
--- binutils/gas/config/tc-i386.c.pni 2003-02-27 11:27:09.000000000 -0800
+++ binutils/gas/config/tc-i386.c 2003-05-05 08:27:55.000000000 -0700
@@ -1392,6 +1392,21 @@ md_assemble (line)
if (i.tm.opcode_modifier & ImmExt)
{
+ if ((i.tm.cpu_flags & CpuPNI) && i.operands > 0)
+ {
+ /* These Intel Precott New Instructions have the fixed
+ operands with an opcode suffix which is coded in the same
+ place as an 8-bit immediate field would be. Here we check
+ those operands and remove them afterwards. */
+ unsigned int x;
+
+ for (x = 0; x < i.operands; x++)
+ if (i.op[x].regs->reg_num != x)
+ as_bad (_("can't use register '%%%s' as operand %d in '%s'."),
+ i.op[x].regs->reg_name, x + 1, i.tm.name);
+ i.operands = 0;
+ }
+
/* These AMD 3DNow! and Intel Katmai New Instructions have an
opcode suffix which is coded in the same place as an 8-bit
immediate field would be. Here we fake an 8-bit immediate
--- binutils/gas/config/tc-i386.h.pni 2003-01-23 09:20:47.000000000 -0800
+++ binutils/gas/config/tc-i386.h 2003-05-05 08:27:55.000000000 -0700
@@ -243,13 +243,14 @@ typedef struct
#define CpuSSE 0x1000 /* Streaming SIMD extensions required */
#define CpuSSE2 0x2000 /* Streaming SIMD extensions 2 required */
#define Cpu3dnow 0x4000 /* 3dnow! support required */
+#define CpuPNI 0x8000 /* Prescott New Instuctions required */
/* These flags are set by gas depending on the flag_code. */
#define Cpu64 0x4000000 /* 64bit support required */
#define CpuNo64 0x8000000 /* Not supported in the 64bit mode */
/* The default value for unknown CPUs - enable all features to avoid problems. */
-#define CpuUnknownFlags (Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuSledgehammer|CpuMMX|CpuSSE|CpuSSE2|Cpu3dnow|CpuK6|CpuAthlon)
+#define CpuUnknownFlags (Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuSledgehammer|CpuMMX|CpuSSE|CpuSSE2|CpuPNI|Cpu3dnow|CpuK6|CpuAthlon)
/* the bits in opcode_modifier are used to generate the final opcode from
the base_opcode. These bits also are used to detect alternate forms of
--- binutils/gas/testsuite/gas/i386/i386.exp.pni 2002-11-06 09:20:11.000000000 -0800
+++ binutils/gas/testsuite/gas/i386/i386.exp 2003-05-05 08:54:06.000000000 -0700
@@ -56,6 +56,7 @@ if [expr ([istarget "i*86-*-*"] || [ist
run_dump_test "absrel"
run_dump_test "pcrel"
run_dump_test "sub"
+ run_dump_test "prescott"
# PIC is only supported on ELF targets.
if { ([istarget "*-*-elf*"] || [istarget "*-*-linux*"] )
--- binutils/gas/testsuite/gas/i386/prescott.d.pni 2003-05-05 08:53:28.000000000 -0700
+++ binutils/gas/testsuite/gas/i386/prescott.d 2003-05-05 09:23:20.000000000 -0700
@@ -0,0 +1,37 @@
+#objdump: -dw
+#name: i386 prescott
+
+.*: +file format .*
+
+Disassembly of section .text:
+
+0+000 <foo>:
+ 0: 66 0f d0 01 [ ]*addsubpd \(%ecx\),%xmm0
+ 4: 66 0f d0 ca [ ]*addsubpd %xmm2,%xmm1
+ 8: f2 0f d0 13 [ ]*addsubps \(%ebx\),%xmm2
+ c: f2 0f d0 dc [ ]*addsubps %xmm4,%xmm3
+ 10: df 88 90 90 90 90 [ ]*fisttp 0x90909090\(%eax\)
+ 16: db 88 90 90 90 90 [ ]*fisttpl 0x90909090\(%eax\)
+ 1c: dd 88 90 90 90 90 [ ]*fisttpll 0x90909090\(%eax\)
+ 22: dd 88 90 90 90 90 [ ]*fisttpll 0x90909090\(%eax\)
+ 28: dd 88 90 90 90 90 [ ]*fisttpll 0x90909090\(%eax\)
+ 2e: 66 0f 7c 65 00 [ ]*haddpd 0x0\(%ebp\),%xmm4
+ 33: 66 0f 7c ee [ ]*haddpd %xmm6,%xmm5
+ 37: f2 0f 7c 37 [ ]*haddps \(%edi\),%xmm6
+ 3b: f2 0f 7c f8 [ ]*haddps %xmm0,%xmm7
+ 3f: 66 0f 7d c1 [ ]*hsubpd %xmm1,%xmm0
+ 43: 66 0f 7d 0a [ ]*hsubpd \(%edx\),%xmm1
+ 47: f2 0f 7d d2 [ ]*hsubps %xmm2,%xmm2
+ 4b: f2 0f 7d 1c 24 [ ]*hsubps \(%esp,1\),%xmm3
+ 50: f2 0f f0 2e [ ]*lddqu \(%esi\),%xmm5
+ 54: 0f 01 c8 [ ]*monitor %eax,%ecx,%edx
+ 57: 0f 01 c8 [ ]*monitor %eax,%ecx,%edx
+ 5a: f2 0f 12 f7 [ ]*movddup %xmm7,%xmm6
+ 5e: f2 0f 12 38 [ ]*movddup \(%eax\),%xmm7
+ 62: f3 0f 16 01 [ ]*movshdup \(%ecx\),%xmm0
+ 66: f3 0f 16 ca [ ]*movshdup %xmm2,%xmm1
+ 6a: f3 0f 12 13 [ ]*movsldup \(%ebx\),%xmm2
+ 6e: f3 0f 12 dc [ ]*movsldup %xmm4,%xmm3
+ 72: 0f 01 c9 [ ]*mwait %eax,%ecx
+ 75: 0f 01 c9 [ ]*mwait %eax,%ecx
+ ...
--- binutils/gas/testsuite/gas/i386/prescott.s.pni 2003-05-05 08:53:31.000000000 -0700
+++ binutils/gas/testsuite/gas/i386/prescott.s 2003-05-05 08:46:29.000000000 -0700
@@ -0,0 +1,34 @@
+#Prescott New Instructions
+
+ .text
+foo:
+ addsubpd (%ecx),%xmm0
+ addsubpd %xmm2,%xmm1
+ addsubps (%ebx),%xmm2
+ addsubps %xmm4,%xmm3
+ fisttp 0x90909090(%eax)
+ fisttpl 0x90909090(%eax)
+ fisttpd 0x90909090(%eax)
+ fisttpq 0x90909090(%eax)
+ fisttpll 0x90909090(%eax)
+ haddpd 0x0(%ebp),%xmm4
+ haddpd %xmm6,%xmm5
+ haddps (%edi),%xmm6
+ haddps %xmm0,%xmm7
+ hsubpd %xmm1,%xmm0
+ hsubpd (%edx),%xmm1
+ hsubps %xmm2,%xmm2
+ hsubps (%esp,1),%xmm3
+ lddqu (%esi),%xmm5
+ monitor
+ monitor %eax,%ecx,%edx
+ movddup %xmm7,%xmm6
+ movddup (%eax),%xmm7
+ movshdup (%ecx),%xmm0
+ movshdup %xmm2,%xmm1
+ movsldup (%ebx),%xmm2
+ movsldup %xmm4,%xmm3
+ mwait
+ mwait %eax,%ecx
+
+ .p2align 4,0
--- binutils/include/opcode/i386.h.pni 2002-07-08 08:39:20.000000000 -0700
+++ binutils/include/opcode/i386.h 2003-05-05 08:27:55.000000000 -0700
@@ -1302,6 +1302,30 @@ static const template i386_optab[] = {
{"punpckhqdq",2, 0x660f6d, X, CpuSSE2, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
{"punpcklqdq",2, 0x660f6c, X, CpuSSE2, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+/* Prescott New Instructions. */
+
+{"addsubpd", 2, 0x660fd0, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"addsubps", 2, 0xf20fd0, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"fisttp", 1, 0xdf, 1, CpuPNI, sl_FP|FloatMF|Modrm, { ShortMem|LongMem, 0, 0} },
+/* Intel Syntax */
+{"fisttpd", 1, 0xdd, 1, CpuPNI, FP|Modrm, { LLongMem, 0, 0} },
+{"fisttpq", 1, 0xdd, 1, CpuPNI, FP|Modrm, { LLongMem, 0, 0} },
+{"fisttpll", 1, 0xdd, 1, CpuPNI, FP|Modrm, { LLongMem, 0, 0} },
+{"haddpd", 2, 0x660f7c, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"haddps", 2, 0xf20f7c, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"hsubpd", 2, 0x660f7d, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"hsubps", 2, 0xf20f7d, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"lddqu", 2, 0xf20ff0, X, CpuPNI, FP|Modrm, { LLongMem, RegXMM, 0 } },
+{"monitor", 0, 0x0f01, 0xc8, CpuPNI, FP|ImmExt, { 0, 0, 0} },
+/* Need to ensure only "monitor %eax,%ecx,%edx" is accepted. */
+{"monitor", 3, 0x0f01, 0xc8, CpuPNI, FP|ImmExt, { Reg32, Reg32, Reg32} },
+{"movddup", 2, 0xf20f12, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"movshdup", 2, 0xf30f16, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"movsldup", 2, 0xf30f12, X, CpuPNI, FP|Modrm, { RegXMM|LLongMem, RegXMM, 0 } },
+{"mwait", 0, 0x0f01, 0xc9, CpuPNI, FP|ImmExt, { 0, 0, 0} },
+/* Need to ensure only "mwait %eax,%ecx" is accepted. */
+{"mwait", 2, 0x0f01, 0xc9, CpuPNI, FP|ImmExt, { Reg32, Reg32, 0} },
+
/* AMD 3DNow! instructions. */
{"prefetch", 1, 0x0f0d, 0, Cpu3dnow, FP|Modrm, { ByteMem, 0, 0 } },
--- binutils/opcodes/i386-dis.c.pni 2003-03-24 09:53:02.000000000 -0800
+++ binutils/opcodes/i386-dis.c 2003-05-05 08:27:55.000000000 -0700
@@ -93,6 +93,7 @@ static void OP_XS PARAMS ((int, int));
static void OP_3DNowSuffix PARAMS ((int, int));
static void OP_SIMD_Suffix PARAMS ((int, int));
static void SIMD_Fixup PARAMS ((int, int));
+static void PNI_Fixup PARAMS ((int, int));
static void BadOp PARAMS ((void));
struct dis_private {
@@ -417,6 +418,12 @@ fetch_data (info, addr)
#define PREGRP24 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 24, NULL, 0
#define PREGRP25 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 25, NULL, 0
#define PREGRP26 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 26, NULL, 0
+#define PREGRP27 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 27, NULL, 0
+#define PREGRP28 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 28, NULL, 0
+#define PREGRP29 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 29, NULL, 0
+#define PREGRP30 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 30, NULL, 0
+#define PREGRP31 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 31, NULL, 0
+#define PREGRP32 NULL, NULL, USE_PREFIX_USER_TABLE, NULL, 32, NULL, 0
#define X86_64_0 NULL, NULL, X86_64_SPECIAL, NULL, 0, NULL, 0
@@ -776,11 +783,11 @@ static const struct dis386 dis386_twobyt
/* 10 */
{ PREGRP8 },
{ PREGRP9 },
- { "movlpX", XM, EX, SIMD_Fixup, 'h' }, /* really only 2 operands */
+ { PREGRP30 },
{ "movlpX", EX, XM, SIMD_Fixup, 'h' },
{ "unpcklpX", XM, EX, XX },
{ "unpckhpX", XM, EX, XX },
- { "movhpX", XM, EX, SIMD_Fixup, 'l' },
+ { PREGRP31 },
{ "movhpX", EX, XM, SIMD_Fixup, 'l' },
/* 18 */
{ GRP14 },
@@ -895,8 +902,8 @@ static const struct dis386 dis386_twobyt
{ "(bad)", XX, XX, XX },
{ "(bad)", XX, XX, XX },
{ "(bad)", XX, XX, XX },
- { "(bad)", XX, XX, XX },
- { "(bad)", XX, XX, XX },
+ { PREGRP28 },
+ { PREGRP29 },
{ PREGRP23 },
{ PREGRP20 },
/* 80 */
@@ -990,7 +997,7 @@ static const struct dis386 dis386_twobyt
{ "bswap", RMeSI, XX, XX },
{ "bswap", RMeDI, XX, XX },
/* d0 */
- { "(bad)", XX, XX, XX },
+ { PREGRP27 },
{ "psrlw", MX, EM, XX },
{ "psrld", MX, EM, XX },
{ "psrlq", MX, EM, XX },
@@ -1026,7 +1033,7 @@ static const struct dis386 dis386_twobyt
{ "pmaxsw", MX, EM, XX },
{ "pxor", MX, EM, XX },
/* f0 */
- { "(bad)", XX, XX, XX },
+ { PREGRP32 },
{ "psllw", MX, EM, XX },
{ "pslld", MX, EM, XX },
{ "psllq", MX, EM, XX },
@@ -1078,15 +1085,15 @@ static const unsigned char twobyte_has_m
/* 40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4f */
/* 50 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 5f */
/* 60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6f */
- /* 70 */ 1,1,1,1,1,1,1,0,0,0,0,0,0,0,1,1, /* 7f */
+ /* 70 */ 1,1,1,1,1,1,1,0,0,0,0,0,1,1,1,1, /* 7f */
/* 80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 8f */
/* 90 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 9f */
/* a0 */ 0,0,0,1,1,1,0,0,0,0,0,1,1,1,1,1, /* af */
/* b0 */ 1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1, /* bf */
/* c0 */ 1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0, /* cf */
- /* d0 */ 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* df */
+ /* d0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* df */
/* e0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ef */
- /* f0 */ 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0 /* ff */
+ /* f0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0 /* ff */
/* ------------------------------- */
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
};
@@ -1095,21 +1102,21 @@ static const unsigned char twobyte_uses_
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
/* ------------------------------- */
/* 00 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0f */
- /* 10 */ 1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1f */
+ /* 10 */ 1,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0, /* 1f */
/* 20 */ 0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,0, /* 2f */
/* 30 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 3f */
/* 40 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 4f */
/* 50 */ 0,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1, /* 5f */
/* 60 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1, /* 6f */
- /* 70 */ 1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 7f */
+ /* 70 */ 1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1, /* 7f */
/* 80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 8f */
/* 90 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 9f */
/* a0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* af */
/* b0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* bf */
/* c0 */ 0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */
- /* d0 */ 0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0, /* df */
+ /* d0 */ 1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0, /* df */
/* e0 */ 0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0, /* ef */
- /* f0 */ 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0 /* ff */
+ /* f0 */ 1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0 /* ff */
/* ------------------------------- */
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
};
@@ -1349,7 +1356,7 @@ static const struct dis386 grps[][8] = {
/* GRP7 */
{
{ "sgdtQ", M, XX, XX },
- { "sidtQ", M, XX, XX },
+ { "sidtQ", PNI_Fixup, 0, XX, XX },
{ "lgdtQ", M, XX, XX },
{ "lidtQ", M, XX, XX },
{ "smswQ", Ev, XX, XX },
@@ -1638,6 +1645,48 @@ static const struct dis386 prefix_user_t
{ "punpcklqdq", XM, EX, XX },
{ "(bad)", XM, EX, XX },
},
+ /* PREGRP27 */
+ {
+ { "(bad)", MX, EX, XX },
+ { "(bad)", XM, EX, XX },
+ { "addsubpd", XM, EX, XX },
+ { "addsubps", XM, EX, XX },
+ },
+ /* PREGRP28 */
+ {
+ { "(bad)", MX, EX, XX },
+ { "(bad)", XM, EX, XX },
+ { "haddpd", XM, EX, XX },
+ { "haddps", XM, EX, XX },
+ },
+ /* PREGRP29 */
+ {
+ { "(bad)", MX, EX, XX },
+ { "(bad)", XM, EX, XX },
+ { "hsubpd", XM, EX, XX },
+ { "hsubps", XM, EX, XX },
+ },
+ /* PREGRP30 */
+ {
+ { "movlpX", XM, EX, SIMD_Fixup, 'h' }, /* really only 2 operands */
+ { "movsldup", XM, EX, XX },
+ { "movlpd", XM, EX, XX },
+ { "movddup", XM, EX, XX },
+ },
+ /* PREGRP31 */
+ {
+ { "movhpX", XM, EX, SIMD_Fixup, 'l' },
+ { "movshdup", XM, EX, XX },
+ { "movhpd", XM, EX, XX },
+ { "(bad)", XM, EX, XX },
+ },
+ /* PREGRP32 */
+ {
+ { "(bad)", XM, EX, XX },
+ { "(bad)", XM, EX, XX },
+ { "(bad)", XM, EX, XX },
+ { "lddqu", XM, M, XX },
+ },
};
static const struct dis386 x86_64_table[][2] = {
@@ -2294,7 +2343,7 @@ static const char *float_mem[] = {
"fidivr{l||l|}",
/* db */
"fild{l||l|}",
- "(bad)",
+ "fisttp{l||l|}",
"fist{l||l|}",
"fistp{l||l|}",
"(bad)",
@@ -2312,7 +2361,7 @@ static const char *float_mem[] = {
"fdivr{l||l|}",
/* dd */
"fld{l||l|}",
- "(bad)",
+ "fisttpll",
"fst{l||l|}",
"fstp{l||l|}",
"frstor",
@@ -2330,7 +2379,7 @@ static const char *float_mem[] = {
"fidivr",
/* df */
"fild",
- "(bad)",
+ "fisttp",
"fist",
"fistp",
"fbld",
@@ -4138,6 +4187,33 @@ SIMD_Fixup (extrachar, sizeflag)
}
static void
+PNI_Fixup (extrachar, sizeflag)
+ int extrachar ATTRIBUTE_UNUSED;
+ int sizeflag ATTRIBUTE_UNUSED;
+{
+ if (mod == 3 && reg == 1)
+ {
+ char *p = obuf + strlen (obuf);
+
+ /* Override "sidt". */
+ if (rm)
+ {
+ /* mwait %eax,%ecx */
+ strcpy (p - 4, "mwait %eax,%ecx");
+ }
+ else
+ {
+ /* monitor %eax,%ecx,%edx" */
+ strcpy (p - 4, "monitor %eax,%ecx,%edx");
+ }
+
+ codep++;
+ }
+ else
+ OP_E (0, sizeflag);
+}
+
+static void
BadOp (void)
{
/* Throw away prefixes and 1st. opcode byte. */
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