#include <sdcc-lib.h>
#if _SDCC_MANGLES_SUPPORT_FUNS
-unsigned long _divulong (unsigned long a, unsigned long b);
+unsigned long _divulong (unsigned long x, unsigned long y);
#endif
/* Assembler-functions are provided for:
#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)
+# if defined(SDCC_STACK_AUTO) && !defined(SDCC_PARMS_IN_BANK1)
# define _DIVSLONG_ASM_SMALL_AUTO
# else
# define _DIVSLONG_ASM_SMALL
#if defined _DIVSLONG_ASM_SMALL
static void
-_divslong_dummy (void) _naked
+_divslong_dummy (void) __naked
{
- _asm
-
- #define a0 dpl
- #define a1 dph
- #define a2 b
- #define a3 r3
-
- .globl __divslong
-
- // _divslong_PARM_2 shares the same memory with _divulong_PARM_2
- // and is defined in _divulong.c
- #define b0 (__divslong_PARM_2)
- #define b1 (__divslong_PARM_2 + 1)
- #define b2 (__divslong_PARM_2 + 2)
- #define b3 (__divslong_PARM_2 + 3)
-
- __divslong:
- ; a3 in acc
- ; b3 in (__divslong_PARM_2 + 3)
- mov a3,a ; save a3
-
- 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,a0
- mov a0,a
- clr a
- subb a,a1
- mov a1,a
- clr a
- subb a,a2
- mov a2,a
- clr a
- subb a,a3
- mov a3,a
-
- a_not_negative:
-
- mov a,b3
- jnb acc.7,b_not_negative
-
- cpl F0
-
- clr a
- clr c
- subb a,b0
- mov b0,a
- clr a
- subb a,b1
- mov b1,a
- clr a
- subb a,b2
- mov b2,a
- clr a
- subb a,b3
- mov b3,a
-
- b_not_negative:
-
- mov a,a3 ; restore a3 in acc
-
- lcall __divulong
-
- jnb F0,not_negative
-
- mov a3,a ; save a3
-
- clr a
- clr c
- subb a,a0
- mov a0,a
- clr a
- subb a,a1
- mov a1,a
- clr a
- subb a,a2
- mov a2,a
- clr a
- subb a,a3
- mov a3,a
-
- not_negative:
- ret
-
- _endasm ;
+ __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
+_divslong_dummy (void) __naked
{
- _asm
-
- #define a0 dpl
- #define a1 dph
- #define a2 b
- #define a3 r3
-
- .globl __divslong
-
- __divslong:
-
- ; a3 in acc
- mov a3,a ; save a3
-
- 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,a0
- mov a0,a
- clr a
- subb a,a1
- mov a1,a
- clr a
- subb a,a2
- mov a2,a
- clr a
- subb a,a3
- mov a3,a
-
- a_not_negative:
-
- mov a,sp
- add a,#-2 ; 2 bytes return address
- mov r0,a ; r0 points to b3
- mov a,@r0 ; b3
-
- jnb acc.7,b_not_negative
-
- cpl F0
-
- dec r0
- dec r0
- dec r0
-
- clr a
- clr c
- subb a,@r0 ; b0
- mov @r0,a
- clr a
- inc r0
- subb a,@r0 ; b1
- mov @r0,a
- clr a
- inc r0
- subb a,@r0 ; b2
- mov @r0,a
- clr a
- inc r0
- subb a,@r0 ; b3
- mov @r0,a
-
- b_not_negative:
- dec r0
- dec r0
- dec r0 ; r0 points to b0
-
- lcall __divlong
-
- jnb F0,not_negative
-
- mov a3,a ; save a3
-
- clr a
- clr c
- subb a,a0
- mov a0,a
- clr a
- subb a,a1
- mov a1,a
- clr a
- subb a,a2
- mov a2,a
- clr a
- subb a,a3
- mov a3,a
-
- not_negative:
- ret
-
- _endasm ;
+ __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 a, long b)
+_divslong (long x, long y)
{
long r;
- r = _divulong((a < 0 ? -a : a),
- (b < 0 ? -b : b));
- if ( (a < 0) ^ (b < 0))
+ r = _divulong((x < 0 ? -x : x),
+ (y < 0 ? -y : y));
+ if ( (x < 0) ^ (y < 0))
return -r;
else
return r;
projects / fw / sdcc / blobdiff