Support ABS intrinsic on ARM

This code will generate the following sequence on arm:
r1=dst
r0=src

movs r1, r0
rsbmi r1, r0, #0

movs will set the N-flag when the MSB of r0 is set, if it is set, rsb
will calculate dst:=0-src;

git-svn-id: trunk@21678 -

compiler/arm/narminl.pas

@@ -49,6 +49,7 @@ interface
         procedure second_sin_real; override;
         }
         procedure second_prefetch; override;
+        procedure second_abs_long; override;
       private
         procedure load_fpu_location(out singleprec: boolean);
       end;
@@ -59,14 +60,14 @@ implementation
     uses
       globtype,systems,
       cutils,verbose,globals,fmodule,
-      cpuinfo,
+      cpuinfo, defutil,
       symconst,symdef,
       aasmbase,aasmtai,aasmdata,aasmcpu,
       cgbase,cgutils,
       pass_1,pass_2,
       cpubase,paramgr,
       nbas,ncon,ncal,ncnv,nld,
-      tgobj,ncgutil,cgobj,cg64f32,rgobj,rgcpu,cgcpu;
+      tgobj,ncgutil,cgobj,cg64f32,rgobj,rgcpu,cgcpu, hlcgobj;
 
 {*****************************************************************************
                               tarminlinenode
@@ -338,6 +339,21 @@ implementation
           end;
       end;
 
+    procedure tarminlinenode.second_abs_long;
+      var
+        hregister : tregister;
+        opsize : tcgsize;
+        hp : taicpu;
+      begin
+        secondpass(left);
+        opsize:=def_cgsize(left.resultdef);
+        hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
+        hregister:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
+        location:=left.location;
+        location.register:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
+        current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg(A_MOV,location.register,left.location.register), PF_S));
+        current_asmdata.CurrAsmList.concat(setcondition(taicpu.op_reg_reg_const(A_RSB,location.register,location.register, 0), C_MI));
+      end;
 
 begin
   cinlinenode:=tarminlinenode;

compiler/options.pas

@@ -2746,7 +2746,7 @@ begin
   def_system_macro('FPC_STATICRIPFIXED');
   def_system_macro('FPC_VARIANTCOPY_FIXED');
   def_system_macro('FPC_DYNARRAYCOPY_FIXED');
-{$if defined(x86) or defined(powerpc) or defined(powerpc64)}
+{$if defined(x86) or defined(powerpc) or defined(powerpc64) or defined(cpuarm)}
   def_system_macro('FPC_HAS_INTERNAL_ABS_LONG');
 {$endif}
   def_system_macro('FPC_HAS_UNICODESTRING');