* tc-i386.c (md_assemble): Handle third byte of the opcode as prefix.

	* i386.h (i386_optab): Make [sml]fence template to use immext field.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 24c1561c0983d942335979572bded3f1d1f6e902..b97f75918b1aacf6d6a451f8743f4d2a05e46145 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,7 @@
+Fri Jan  5 13:26:42 MET 2001  Jan Hubicka  <jh@suse.cz>
+
+       * tc-i386.c (md_assemble): Handle third byte of the opcode as prefix.
+
 Thu Jan  4 22:25:26 MET 2001  Jan Hubicka  <jh@suse.cz>
 
        * tc-i386.c (cpu_arch): Add Pentium4 and modify sledgehammer entry.

diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index f346ed2a5e3348eacefffa5a3c3f00a25ca61170..df00e665c9e8fc1c199102030835e2b0bd1e48a2 100644 (file)
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -2826,6 +2826,11 @@ md_assemble (line)
        /* Output normal instructions here.  */
        unsigned char *q;
 
+       /* All opcodes on i386 have eighter 1 or 2 bytes.  We may use third
+          byte for the SSE instructions to specify prefix they require.  */
+       if (i.tm.base_opcode & 0xff0000)
+         add_prefix ((i.tm.base_opcode >> 16) & 0xff);
+
        /* The prefix bytes.  */
        for (q = i.prefix;
             q < i.prefix + sizeof (i.prefix) / sizeof (i.prefix[0]);
@@ -2845,7 +2850,7 @@ md_assemble (line)
            insn_size += 1;
            FRAG_APPEND_1_CHAR (i.tm.base_opcode);
          }
-       else if (fits_in_unsigned_word (i.tm.base_opcode))
+       else
          {
            insn_size += 2;
            p = frag_more (2);
@@ -2853,23 +2858,6 @@ md_assemble (line)
            *p++ = (i.tm.base_opcode >> 8) & 0xff;
            *p = i.tm.base_opcode & 0xff;
          }
-       else
-         {                     /* Opcode is either 3 or 4 bytes.  */
-           if (i.tm.base_opcode & 0xff000000)
-             {
-               insn_size += 4;
-               p = frag_more (4);
-               *p++ = (i.tm.base_opcode >> 24) & 0xff;
-             }
-           else
-             {
-               insn_size += 3;
-               p = frag_more (3);
-             }
-           *p++ = (i.tm.base_opcode >> 16) & 0xff;
-           *p++ = (i.tm.base_opcode >> 8) & 0xff;
-           *p = (i.tm.base_opcode) & 0xff;
-         }
 
        /* Now the modrm byte and sib byte (if present).  */
        if (i.tm.opcode_modifier & Modrm)

diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index ccb5dd1cb9f3bfb4c2ab10241da1127aa8df9523..db9120ec506bbd8c6e69af880a107c2dd90298cf 100644 (file)
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,9 +1,13 @@
-Wed Jan  3 16:27:15 MET 2001  Jan hubicka  <jh@suse.cz>
+Fri Jan  5 13:22:23 MET 2001  Jan Hubicka  <jh@suse.cz>
+
+       * i386.h (i386_optab): Make [sml]fence template to use immext field.
+
+Wed Jan  3 16:27:15 MET 2001  Jan Hubicka  <jh@suse.cz>
 
        * i386.h (i386_optab): Fix 64bit pushf template; Add instructions
        introduced by Pentium4
 
-Sat Dec 30 19:03:15 MET 2000  Jan hubicka  <jh@suse.cz>
+Sat Dec 30 19:03:15 MET 2000  Jan Hubicka  <jh@suse.cz>
 
        * i386.h (i386_optab): Add "rex*" instructions;
        add swapgs; disable jmp/call far direct instructions for

diff --git a/include/opcode/i386.h b/include/opcode/i386.h
index 17400ea9a9163932d9fe86ddcf6f9ebf9c4b7d26..dd67c8658665378908ae2b03fa286974a25bd7c0 100644 (file)
--- a/include/opcode/i386.h
+++ b/include/opcode/i386.h
@@ -953,8 +953,8 @@ static const template i386_optab[] = {
 
 {"movnti",    2, 0x0fc3,    X, CpuP4, lq_Suf|Modrm,    { WordReg|WordMem, WordReg, 0 } },
 {"clflush",   1, 0x0fae,    7, CpuP4, FP|Modrm,        { ByteMem, 0, 0 } },
-{"lfence",    0, 0x0faee8,  X, CpuP4, FP,              { 0, 0, 0 } },
-{"mfence",    0, 0x0faef0,  X, CpuP4, FP,              { 0, 0, 0 } },
+{"lfence",    0, 0x0fae, 0xe8, CpuP4, FP|ImmExt,       { 0, 0, 0 } },
+{"mfence",    0, 0x0fae, 0xf0, CpuP4, FP|ImmExt,       { 0, 0, 0 } },
 {"pause",     0, 0xf390,    X, CpuP4, FP,              { 0, 0, 0 } },
 
 /* MMX/SSE2 instructions.  */
@@ -1172,7 +1172,7 @@ static const template i386_optab[] = {
 {"rcpss",     2, 0xf30f53,  X, CpuSSE, FP|Modrm,       { RegXMM|WordMem, RegXMM, 0 } },
 {"rsqrtps",   2, 0x0f52,    X, CpuSSE, FP|Modrm,       { RegXMM|LLongMem, RegXMM, 0 } },
 {"rsqrtss",   2, 0xf30f52,  X, CpuSSE, FP|Modrm,       { RegXMM|WordMem, RegXMM, 0 } },
-{"sfence",    0, 0x0faef8,  X, CpuSSE, FP,             { 0, 0, 0 } },
+{"sfence",    0, 0x0fae, 0xf8, CpuSSE, FP|ImmExt,      { 0, 0, 0 } },
 {"shufps",    3, 0x0fc6,    X, CpuSSE, FP|Modrm,       { Imm8, RegXMM|LLongMem, RegXMM } },
 {"sqrtps",    2, 0x0f51,    X, CpuSSE, FP|Modrm,       { RegXMM|LLongMem, RegXMM, 0 } },
 {"sqrtss",    2, 0xf30f51,  X, CpuSSE, FP|Modrm,       { RegXMM|WordMem, RegXMM, 0 } },