Revert rs6000 change.

From-SVN: r140646

gcc/ChangeLog

+2008-09-24  David Edelsohn  <edelsohn@gnu.org>
+
+	Revert:
+	2008-09-24  Michael J. Eager  <eager@eagercon.com>
+
 2008-09-24  Aldy Hernandez  <aldyh@redhat.com>
 
 	* c-common.c (fname_decl): New location argument.

gcc/config.gcc

@@ -1791,11 +1791,6 @@ powerpc-*-eabialtivec*)
 	extra_options="${extra_options} rs6000/sysv4.opt"
 	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcendian rs6000/t-ppccomm"
 	;;
-powerpc-xilinx-eabi*)
-	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/singlefp.h"
-	extra_options="${extra_options} rs6000/sysv4.opt"
-	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
-	;;
 powerpc-*-eabi*)
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/eabi.h rs6000/e500.h"
 	extra_options="${extra_options} rs6000/sysv4.opt"

gcc/config/rs6000/predicates.md

@@ -192,8 +192,7 @@
     return 0;
 
   /* Consider all constants with -msoft-float to be easy.  */
-  if ((TARGET_SOFT_FLOAT || TARGET_E500_SINGLE 
-      || (TARGET_HARD_FLOAT && (TARGET_SINGLE_FLOAT && ! TARGET_DOUBLE_FLOAT)))
+  if ((TARGET_SOFT_FLOAT || TARGET_E500_SINGLE)
       && mode != DImode)
     return 1;
 

gcc/config/rs6000/rs6000-c.c

@@ -297,8 +297,7 @@ rs6000_cpu_cpp_builtins (cpp_reader *pfile)
     builtin_define ("__PAIRED__");
   if (TARGET_SOFT_FLOAT)
     builtin_define ("_SOFT_FLOAT");
-  if ((!(TARGET_HARD_FLOAT && (TARGET_FPRS || TARGET_E500_DOUBLE)))
-      ||(TARGET_HARD_FLOAT && TARGET_FPRS && !TARGET_DOUBLE_FLOAT))
+  if (!(TARGET_HARD_FLOAT && (TARGET_FPRS || TARGET_E500_DOUBLE)))
     builtin_define ("_SOFT_DOUBLE");
   /* Used by lwarx/stwcx. errata work-around.  */
   if (rs6000_cpu == PROCESSOR_PPC405)

gcc/config/rs6000/rs6000.h

@@ -298,17 +298,6 @@ enum processor_type
    PROCESSOR_CELL
 };
 
-/* FPU operations supported. 
-   Each use of TARGET_SINGLE_FLOAT or TARGET_DOUBLE_FLOAT must 
-   also test TARGET_HARD_FLOAT.  */
-#define TARGET_SINGLE_FLOAT 1
-#define TARGET_DOUBLE_FLOAT 1
-#define TARGET_SINGLE_FPU   0
-#define TARGET_SIMPLE_FPU   0
-
-#define TARGET_SINGLE_FLOAT_MODE(MODE) (TARGET_SINGLE_FLOAT && (MODE) == SFmode)
-#define TARGET_DOUBLE_FLOAT_MODE(MODE) (TARGET_DOUBLE_FLOAT && (MODE) == DFmode)
-
 extern enum processor_type rs6000_cpu;
 
 /* Recast the processor type to the cpu attribute.  */

gcc/config/rs6000/rs6000.opt

@@ -260,15 +260,3 @@ Specify alignment of structure fields default/natural
 mprioritize-restricted-insns=
 Target RejectNegative Joined UInteger Var(rs6000_sched_restricted_insns_priority)
 Specify scheduling priority for dispatch slot restricted insns
-
-msingle-float
-Target RejectNegative Var(rs6000_single_float)
-Single-precision floating point unit
-
-mdouble-float
-Target RejectNegative Var(rs6000_double_float)
-Double-precision floating point unit
-
-msimple-fpu
-Target RejectNegative Var(rs6000_simple_fpu)
-Floating point unit does not support divide & sqrt

gcc/doc/invoke.texi

@@ -715,7 +715,6 @@ See RS/6000 and PowerPC Options.
 -m64  -m32  -mxl-compat  -mno-xl-compat  -mpe @gol
 -malign-power  -malign-natural @gol
 -msoft-float  -mhard-float  -mmultiple  -mno-multiple @gol
--msingle-float -mdouble-float -msimple-fpu @gol
 -mstring  -mno-string  -mupdate  -mno-update @gol
 -mfused-madd  -mno-fused-madd  -mbit-align  -mno-bit-align @gol
 -mstrict-align  -mno-strict-align  -mrelocatable @gol
@@ -13420,8 +13419,7 @@ following options:
 
 @gccoptlist{-maltivec  -mfprnd  -mhard-float  -mmfcrf  -mmultiple @gol
 -mnew-mnemonics  -mpopcntb  -mpower  -mpower2  -mpowerpc64 @gol
--mpowerpc-gpopt  -mpowerpc-gfxopt  -msingle-float -mdouble-float @gol
--msimple-fpu -mstring  -mmulhw  -mdlmzb  -mmfpgpr}
+-mpowerpc-gpopt  -mpowerpc-gfxopt  -mstring  -mmulhw  -mdlmzb  -mmfpgpr}
 
 The particular options set for any particular CPU will vary between
 compiler versions, depending on what setting seems to produce optimal
@@ -13638,17 +13636,6 @@ Generate code that does not use (uses) the floating-point register set.
 Software floating point emulation is provided if you use the
 @option{-msoft-float} option, and pass the option to GCC when linking.
 
-@item -msingle-float
-@itemx -mdouble-float
-@opindex msingle-float
-@opindex mdouble-float
-Generate code for single or double-precision floating point operations. 
-@option{-mdouble-float} implies @option{-msingle-float}. 
-
-@item -msimple-fpu
-@opindex msimple-fpu
-Do not generate sqrt and div instructions for hardware floating point unit.
-
 @item -mmultiple
 @itemx -mno-multiple
 @opindex mmultiple