/* mc68020 __mpn_addmul_1 -- Multiply a limb vector with a limb and add the result to a second limb vector. Copyright (C) 1992, 1994, 1996, 1998, 2012 Free Software Foundation, Inc. This file is part of the GNU MP Library. The GNU MP Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU MP 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU MP Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* INPUT PARAMETERS res_ptr (sp + 4) s1_ptr (sp + 8) s1_size (sp + 12) s2_limb (sp + 16) */ #include "sysdep.h" #include "asm-syntax.h" TEXT ENTRY(__mpn_addmul_1) #define res_ptr a0 #define s1_ptr a1 #define s1_size d2 #define s2_limb d4 /* Save used registers on the stack. */ moveml R(d2)-R(d5),MEM_PREDEC(sp) cfi_adjust_cfa_offset (4*4) cfi_rel_offset (R(d2), 0) cfi_rel_offset (R(d3), 4) cfi_rel_offset (R(d4), 8) cfi_rel_offset (R(d5), 12) /* Copy the arguments to registers. Better use movem? */ movel MEM_DISP(sp,20),R(res_ptr) movel MEM_DISP(sp,24),R(s1_ptr) movel MEM_DISP(sp,28),R(s1_size) movel MEM_DISP(sp,32),R(s2_limb) eorw #1,R(s1_size) clrl R(d1) clrl R(d5) lsrl #1,R(s1_size) bcc L(L1) subql #1,R(s1_size) subl R(d0),R(d0) /* (d0,cy) <= (0,0) */ L(Loop:) movel MEM_POSTINC(s1_ptr),R(d3) mulul R(s2_limb),R(d1):R(d3) addxl R(d0),R(d3) addxl R(d5),R(d1) addl R(d3),MEM_POSTINC(res_ptr) L(L1:) movel MEM_POSTINC(s1_ptr),R(d3) mulul R(s2_limb),R(d0):R(d3) addxl R(d1),R(d3) addxl R(d5),R(d0) addl R(d3),MEM_POSTINC(res_ptr) dbf R(s1_size),L(Loop) addxl R(d5),R(d0) subl #0x10000,R(s1_size) bcc L(Loop) /* Restore used registers from stack frame. */ moveml MEM_POSTINC(sp),R(d2)-R(d5) cfi_adjust_cfa_offset (-4*4) cfi_restore (R(d2)) cfi_restore (R(d3)) cfi_restore (R(d4)) cfi_restore (R(d5)) rts END(__mpn_addmul_1)