diff options
Diffstat (limited to 'ports/sysdeps/m68k/m680x0/rshift.S')
| -rw-r--r-- | ports/sysdeps/m68k/m680x0/rshift.S | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/ports/sysdeps/m68k/m680x0/rshift.S b/ports/sysdeps/m68k/m680x0/rshift.S deleted file mode 100644 index e2d335405c..0000000000 --- a/ports/sysdeps/m68k/m680x0/rshift.S +++ /dev/null @@ -1,167 +0,0 @@ -/* mc68020 __mpn_rshift -- Shift right a low-level natural-number integer. - -Copyright (C) 1996-2014 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. If not, see <http://www.gnu.org/licenses/>. */ - -/* - INPUT PARAMETERS - res_ptr (sp + 4) - s_ptr (sp + 8) - s_size (sp + 16) - cnt (sp + 12) -*/ - -#include "sysdep.h" -#include "asm-syntax.h" - -#define res_ptr a1 -#define s_ptr a0 -#define s_size d6 -#define cnt d4 - - TEXT -ENTRY(__mpn_rshift) -/* Save used registers on the stack. */ - moveml R(d2)-R(d6)/R(a2),MEM_PREDEC(sp) - cfi_adjust_cfa_offset (6*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) - cfi_rel_offset (R(d6), 16) - cfi_rel_offset (R(a2), 20) - -/* Copy the arguments to registers. */ - movel MEM_DISP(sp,28),R(res_ptr) - movel MEM_DISP(sp,32),R(s_ptr) - movel MEM_DISP(sp,36),R(s_size) - movel MEM_DISP(sp,40),R(cnt) - - moveql #1,R(d5) - cmpl R(d5),R(cnt) - bne L(Lnormal) - cmpl R(res_ptr),R(s_ptr) - bls L(Lspecial) /* jump if res_ptr >= s_ptr */ -#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020)) - lea MEM_INDX1(res_ptr,s_size,l,4),R(a2) -#else /* not mc68020 */ - movel R(s_size),R(d0) - asll #2,R(d0) - lea MEM_INDX(res_ptr,d0,l),R(a2) -#endif - cmpl R(s_ptr),R(a2) - bls L(Lspecial) /* jump if s_ptr >= res_ptr + s_size */ - -L(Lnormal:) - moveql #32,R(d5) - subl R(cnt),R(d5) - movel MEM_POSTINC(s_ptr),R(d2) - movel R(d2),R(d0) - lsll R(d5),R(d0) /* compute carry limb */ - - lsrl R(cnt),R(d2) - movel R(d2),R(d1) - subql #1,R(s_size) - beq L(Lend) - lsrl #1,R(s_size) - bcs L(L1) - subql #1,R(s_size) - -L(Loop:) - movel MEM_POSTINC(s_ptr),R(d2) - movel R(d2),R(d3) - lsll R(d5),R(d3) - orl R(d3),R(d1) - movel R(d1),MEM_POSTINC(res_ptr) - lsrl R(cnt),R(d2) -L(L1:) - movel MEM_POSTINC(s_ptr),R(d1) - movel R(d1),R(d3) - lsll R(d5),R(d3) - orl R(d3),R(d2) - movel R(d2),MEM_POSTINC(res_ptr) - lsrl R(cnt),R(d1) - - dbf R(s_size),L(Loop) - subl #0x10000,R(s_size) - bcc L(Loop) - -L(Lend:) - movel R(d1),MEM(res_ptr) /* store most significant limb */ - -/* Restore used registers from stack frame. */ - moveml MEM_POSTINC(sp),R(d2)-R(d6)/R(a2) - cfi_remember_state - cfi_adjust_cfa_offset (-6*4) - cfi_restore (R(d2)) - cfi_restore (R(d3)) - cfi_restore (R(d4)) - cfi_restore (R(d5)) - cfi_restore (R(d6)) - cfi_restore (R(a2)) - rts - -/* We loop from most significant end of the arrays, which is only - permissible if the source and destination don't overlap, since the - function is documented to work for overlapping source and destination. */ - - cfi_restore_state -L(Lspecial:) -#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020)) - lea MEM_INDX1(s_ptr,s_size,l,4),R(s_ptr) - lea MEM_INDX1(res_ptr,s_size,l,4),R(res_ptr) -#else /* not mc68000 */ - movel R(s_size),R(d0) - asll #2,R(d0) - addl R(s_size),R(s_ptr) - addl R(s_size),R(res_ptr) -#endif - - clrl R(d0) /* initialize carry */ - eorw #1,R(s_size) - lsrl #1,R(s_size) - bcc L(LL1) - subql #1,R(s_size) - -L(LLoop:) - movel MEM_PREDEC(s_ptr),R(d2) - roxrl #1,R(d2) - movel R(d2),MEM_PREDEC(res_ptr) -L(LL1:) - movel MEM_PREDEC(s_ptr),R(d2) - roxrl #1,R(d2) - movel R(d2),MEM_PREDEC(res_ptr) - - dbf R(s_size),L(LLoop) - roxrl #1,R(d0) /* save cy in msb */ - subl #0x10000,R(s_size) - bcs L(LLend) - addl R(d0),R(d0) /* restore cy */ - bra L(LLoop) - -L(LLend:) -/* Restore used registers from stack frame. */ - moveml MEM_POSTINC(sp),R(d2)-R(d6)/R(a2) - cfi_adjust_cfa_offset (-6*4) - cfi_restore (R(d2)) - cfi_restore (R(d3)) - cfi_restore (R(d4)) - cfi_restore (R(d5)) - cfi_restore (R(d6)) - cfi_restore (R(a2)) - rts -END(__mpn_rshift) |