device/lib/pic16/libc/stdio/vsprintf.c: enlarge buffer for x_ftoa()

[fw/sdcc] / device / lib / _divslong.c

diff --git a/device/lib/_divslong.c b/device/lib/_divslong.c
index a14b7cb697ad2c0434f734ea3c1483327879a19a..ac4d9c57768df799e4ea1399c47e1d7a898ae95d 100644 (file)
--- a/device/lib/_divslong.c
+++ b/device/lib/_divslong.c
@@ -1,35 +1,267 @@
 /*-------------------------------------------------------------------------
 /*-------------------------------------------------------------------------

-   _divslong.c - routine for division of 32 bit signed long
+   _divslong.c - routine for division of 32 bit long

 
              Written By -  Sandeep Dutta . sandeep.dutta@usa.net (1999)
 
 
              Written By -  Sandeep Dutta . sandeep.dutta@usa.net (1999)
 

-   This program is free software; you can redistribute it and/or modify it
-   under the terms of the GNU General Public License as published by the
+   This library is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published by the

    Free Software Foundation; either version 2, or (at your option) any
    later version.
    Free Software Foundation; either version 2, or (at your option) any
    later version.

-   
-   This program is distributed in the hope that it will be useful,
+
+   This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

-   GNU General Public License for more details.
-   
-   You should have received a copy of the GNU General Public License
+   GNU Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License

    along with this program; if not, write to the Free Software
    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    along with this program; if not, write to the Free Software
    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

-   
+

    In other words, you are welcome to use, share and improve this program.
    You are forbidden to forbid anyone else to use, share and improve
    In other words, you are welcome to use, share and improve this program.
    You are forbidden to forbid anyone else to use, share and improve

-   what you give them.   Help stamp out software-hoarding!  
+   what you give them.   Help stamp out software-hoarding!

 -------------------------------------------------------------------------*/
 
 -------------------------------------------------------------------------*/
 

-long _divslong (long a, long b)
+
+#include <sdcc-lib.h>
+
+#if _SDCC_MANGLES_SUPPORT_FUNS
+unsigned long _divulong (unsigned long x, unsigned long y);
+#endif
+
+/*   Assembler-functions are provided for:
+     mcs51 small
+     mcs51 small stack-auto
+*/
+
+#if !defined(SDCC_USE_XSTACK) && !defined(_SDCC_NO_ASM_LIB_FUNCS)
+#  if defined(SDCC_mcs51)
+#    if defined(SDCC_MODEL_SMALL)
+#      if defined(SDCC_STACK_AUTO) && !defined(SDCC_PARMS_IN_BANK1)
+#        define _DIVSLONG_ASM_SMALL_AUTO
+#      else
+#        define _DIVSLONG_ASM_SMALL
+#      endif
+#    endif
+#  endif
+#endif
+
+#if defined _DIVSLONG_ASM_SMALL
+
+static void
+_divslong_dummy (void) __naked

 {
 {

-       long r;
-       
-       r = _divulong((a < 0 ? -a : a),
-                    (b < 0 ? -b : b));
-       if ( (a < 0) ^ (b < 0))
-           return -r;
-       else
-           return r;
-}              
+       __asm
+
+       #define x0      dpl
+       #define x1      dph
+       #define x2      b
+       #define x3      r3
+
+       .globl __divslong
+
+       // _divslong_PARM_2 shares the same memory with _divulong_PARM_2
+       // and is defined in _divulong.c
+#if defined(SDCC_PARMS_IN_BANK1)
+       #define y0      (b1_0)
+       #define y1      (b1_1)
+       #define y2      (b1_2)
+       #define y3      (b1_3)
+#else
+       #define y0      (__divslong_PARM_2)
+       #define y1      (__divslong_PARM_2 + 1)
+       #define y2      (__divslong_PARM_2 + 2)
+       #define y3      (__divslong_PARM_2 + 3)
+#endif
+__divslong:
+                               ; x3 in acc
+                               ; y3 in (__divslong_PARM_2 + 3)
+       mov     x3,a            ; save x3
+
+       clr     F0              ; Flag 0 in PSW
+                               ; available to user for general purpose
+       jnb     acc.7,a_not_negative
+
+       setb    F0
+
+       clr     a
+       clr     c
+       subb    a,x0
+       mov     x0,a
+       clr     a
+       subb    a,x1
+       mov     x1,a
+       clr     a
+       subb    a,x2
+       mov     x2,a
+       clr     a
+       subb    a,x3
+       mov     x3,a
+
+a_not_negative:
+
+       mov     a,y3
+       jnb     acc.7,b_not_negative
+
+       cpl     F0
+
+       clr     a
+       clr     c
+       subb    a,y0
+       mov     y0,a
+       clr     a
+       subb    a,y1
+       mov     y1,a
+       clr     a
+       subb    a,y2
+       mov     y2,a
+       clr     a
+       subb    a,y3
+       mov     y3,a
+
+b_not_negative:
+
+       mov     a,x3            ; restore x3 in acc
+
+       lcall   __divulong
+
+       jnb     F0,not_negative
+
+       mov     x3,a            ; save x3
+
+       clr     a
+       clr     c
+       subb    a,x0
+       mov     x0,a
+       clr     a
+       subb    a,x1
+       mov     x1,a
+       clr     a
+       subb    a,x2
+       mov     x2,a
+       clr     a
+       subb    a,x3    ; x3 ends in acc
+
+not_negative:
+       ret
+
+       __endasm;
+}
+
+#elif defined _DIVSLONG_ASM_SMALL_AUTO
+
+static void
+_divslong_dummy (void) __naked
+{
+       __asm
+
+       #define x0      dpl
+       #define x1      dph
+       #define x2      b
+       #define x3      r3
+
+       .globl __divslong
+
+__divslong:
+
+                               ; x3 in acc
+       mov     x3,a            ; save x3
+
+       clr     F0              ; Flag 0 in PSW
+                               ; available to user for general purpose
+       jnb     acc.7,a_not_negative
+
+       setb    F0
+
+       clr     a
+       clr     c
+       subb    a,x0
+       mov     x0,a
+       clr     a
+       subb    a,x1
+       mov     x1,a
+       clr     a
+       subb    a,x2
+       mov     x2,a
+       clr     a
+       subb    a,x3
+       mov     x3,a
+
+a_not_negative:
+
+       mov     a,sp
+       add     a,#-2           ; 2 bytes return address
+       mov     r0,a            ; r0 points to y3
+       mov     a,@r0           ; y3
+
+       jnb     acc.7,b_not_negative
+
+       cpl     F0
+
+       dec     r0
+       dec     r0
+       dec     r0
+
+       clr     a
+       clr     c
+       subb    a,@r0           ; y0
+       mov     @r0,a
+       clr     a
+       inc     r0
+       subb    a,@r0           ; y1
+       mov     @r0,a
+       clr     a
+       inc     r0
+       subb    a,@r0           ; y2
+       mov     @r0,a
+       clr     a
+       inc     r0
+       subb    a,@r0           ; y3
+       mov     @r0,a
+
+b_not_negative:
+       dec     r0
+       dec     r0
+       dec     r0              ; r0 points to y0
+
+       lcall   __divlong
+
+       jnb     F0,not_negative
+
+       mov     x3,a            ; save x3
+
+       clr     a
+       clr     c
+       subb    a,x0
+       mov     x0,a
+       clr     a
+       subb    a,x1
+       mov     x1,a
+       clr     a
+       subb    a,x2
+       mov     x2,a
+       clr     a
+       subb    a,x3            ; x3 ends in acc
+
+not_negative:
+       ret
+
+       __endasm;
+}
+
+#else // _DIVSLONG_ASM
+
+long
+_divslong (long x, long y)
+{
+  long r;
+
+  r = _divulong((x < 0 ? -x : x),
+                (y < 0 ? -y : y));
+  if ( (x < 0) ^ (y < 0))
+    return -r;
+  else
+    return r;
+}
+
+#endif // _DIVSLONG_ASM