Allow spaces in i386 FP reg names, eg. %st ( 1 ).

gas/ChangeLog

@@ -1,3 +1,9 @@
+1999-08-29  Alan Modra  <alan@spri.levels.unisa.edu.au>
+
+	Based on a patch from H.J. Lu  <hjl@gnu.org>
+	* config/tc-i386.c (parse_register): Handle FP regs specially.
+	(md_begin): Remove '(' and ')' from register_chars.
+
 1999-08-29  Doug Evans  <devans@casey.cygnus.com>
 
 	* config/tc-m32r.c (md_parse_option): Delete unrecognized option

gas/config/tc-i386.c

@@ -703,8 +703,6 @@ md_begin ()
 #ifdef LEX_AT
     identifier_chars['@'] = '@';
 #endif
-    register_chars[')'] = ')';
-    register_chars['('] = '(';
     digit_chars['-'] = '-';
     identifier_chars['_'] = '_';
     identifier_chars['.'] = '.';
@@ -4166,6 +4164,39 @@ parse_register (reg_string, end_op)
 
   r = (const reg_entry *) hash_find (reg_hash, reg_name_given);
 
+  /* Handle floating point regs, allowing spaces in the (i) part.  */
+  if (r == i386_regtab /* %st is first entry of table */)
+    {
+      --s;
+      if (is_space_char (*s))
+	++s;
+      if (*s == '(')
+	{
+	  *p++ = *s++;
+	  if (is_space_char (*s))
+	    ++s;
+	  if (*s >= '0' && *s <= '7')
+	    {
+	      r = &i386_float_regtab[*s - '0'];
+	      *p++ = *s++;
+	      if (is_space_char (*s))
+		++s;
+	      if (*s == ')')
+		{
+		  *end_op = s + 1;
+		  return r;
+		}
+	      *p++ = *s;
+	    }
+	  if (!allow_naked_reg)
+	    {
+	      *p = '\0';
+	      as_bad (_("bad register name `%s'"), reg_name_given);
+	    }
+	  return (const reg_entry *) NULL;
+	}
+    }
+
   if (r == NULL)
     {
       if (!allow_naked_reg)

gas/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+1999-08-29  Alan Modra  <alan@spri.levels.unisa.edu.au>
+
+	* gas/i386/white.s, gas/i386/white.l: Add space in FP reg tests.
+
 Sat Aug 28 00:16:12 1999  Jerry Quinn <jquinn@nortelnetworks.com>
 
 	* gas/hppa/basic/basic.exp:  Add new tests shift2.s,

gas/testsuite/gas/i386/white.l

@@ -19,3 +19,6 @@ GAS LISTING .*
   16 0022 66B81300 0000              		Mov \$ foo , %eAx	
   17                                	.Code32 
   18 0028 66B81300                   		mov \$ foo , %ax	
+  19                                	
+  20 002c D9C9                       		fxch   %st  \(  1  \) 
+  21 002e D9C9                       		fxch   %           st\(1\)

gas/testsuite/gas/i386/white.s

@@ -16,3 +16,6 @@ foo:	jmpw % es : * ( % ebx )
 	Mov $ foo , %eAx	
 .Code32 
 	mov $ foo , %ax	
+
+	fxch   %st  (  1  ) 
+	fxch   %           st(1)

include/opcode/ChangeLog

@@ -1,3 +1,9 @@
+1999-08-29  Alan Modra  <alan@spri.levels.unisa.edu.au>
+
+	* i386.h (i386_regtab): Move %st to top of table, and split off
+	other fp reg entries.
+	(i386_float_regtab): To here.
+
 Sat Aug 28 00:25:25 1999  Jerry Quinn <jquinn@nortelnetworks.com>
 
 	* hppa.h (pa_opcodes): Replace 'f' by 'v'.  Prefix float register args

include/opcode/i386.h

@@ -1061,6 +1061,8 @@ static const template i386_optab[] = {
 /* 386 register table */
 
 static const reg_entry i386_regtab[] = {
+  /* make %st first as we test for it */
+  {"st", FloatReg|FloatAcc, 0},
   /* 8 bit regs */
   {"al", Reg8|Acc, 0},
   {"cl", Reg8|ShiftCount, 1},
@@ -1130,16 +1132,7 @@ static const reg_entry i386_regtab[] = {
   {"tr5", Test, 5},
   {"tr6", Test, 6},
   {"tr7", Test, 7},
-  /* float registers */
-  {"st(0)", FloatReg|FloatAcc, 0},
-  {"st", FloatReg|FloatAcc, 0},
-  {"st(1)", FloatReg, 1},
-  {"st(2)", FloatReg, 2},
-  {"st(3)", FloatReg, 3},
-  {"st(4)", FloatReg, 4},
-  {"st(5)", FloatReg, 5},
-  {"st(6)", FloatReg, 6},
-  {"st(7)", FloatReg, 7},
+  /* mmx and simd registers */
   {"mm0", RegMMX, 0},
   {"mm1", RegMMX, 1},
   {"mm2", RegMMX, 2},
@@ -1158,6 +1151,17 @@ static const reg_entry i386_regtab[] = {
   {"xmm7", RegXMM, 7}
 };
 
+static const reg_entry i386_float_regtab[] = {
+  {"st(0)", FloatReg|FloatAcc, 0},
+  {"st(1)", FloatReg, 1},
+  {"st(2)", FloatReg, 2},
+  {"st(3)", FloatReg, 3},
+  {"st(4)", FloatReg, 4},
+  {"st(5)", FloatReg, 5},
+  {"st(6)", FloatReg, 6},
+  {"st(7)", FloatReg, 7}
+};
+
 #define MAX_REG_NAME_SIZE 8	/* for parsing register names from input */
 
 /* segment stuff */