Change from GPL to LPGL

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

diff --git a/device/lib/_muluint.c b/device/lib/_muluint.c
index b50583f1d0674ffdca42dbebf74edb8a1ef0d455..4b2d11c7a0e1d4e4a47b47ca8f4116c88b35478b 100644 (file)
--- a/device/lib/_muluint.c
+++ b/device/lib/_muluint.c
@@ -4,17 +4,17 @@
 
              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.
    
-   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
-   GNU General Public License for more details.
+   GNU Library General Public License for more details.
    
-   You should have received a copy of the GNU General Public License
+   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.
    
@@ -23,15 +23,57 @@
    what you give them.   Help stamp out software-hoarding!  
 -------------------------------------------------------------------------*/
 
+#ifdef SDCC_MODEL_FLAT24
+
+unsigned int _muluint (unsigned int a, unsigned int b) 
+{
+  a*b; // hush the compiler
+
+  /* muluint=
+      (int)(lsb_a*lsb_b) +
+      (char)(msb_a*lsb_b)<<8 +
+      (char)(lsb_a*msb_b)<<8
+  */
+
+  _asm 
+    mov r2,dph ; msb_a
+    mov r3,dpl ; lsb_a
+
+    mov b,r3 ; lsb_a
+    mov dptr,#__muluint_PARM_2
+    movx a,@dptr ; lsb_b
+    mul ab ; lsb_a*lsb_b
+    mov r0,a
+    mov r1,b
+
+    mov b,r2 ; msb_a
+    movx a,@dptr ; lsb_b
+    mul ab ; msb_a*lsb_b
+    add a,r1
+    mov r1,a
+
+    mov b,r3 ; lsb_a
+    inc dptr
+    movx a,@dptr ; msb_b
+    mul ab ; lsb_a*msb_b
+    add a,r1
+
+    mov dph,a
+    mov dpl,r0
+    ret
+  _endasm;
+}
+
+#else
+
 union uu {
        struct { unsigned short lo,hi ;} s;
         unsigned int t;
 } ;
 
-
 unsigned int _muluint (unsigned int a, unsigned int b) 
 {
-#if defined(SDCC_MODEL_LARGE) || defined (SDCC_MODEL_FLAT24)
+#ifdef SDCC_MODEL_LARGE
        union uu _xdata *x;
        union uu _xdata *y; 
        union uu t;
@@ -50,3 +92,5 @@ unsigned int _muluint (unsigned int a, unsigned int b)
 
        return t.t;
 } 
+
+#endif