diff options
Diffstat (limited to 'sysdeps/m68k')
| -rw-r--r-- | sysdeps/m68k/add_n.S | 75 | ||||
| -rw-r--r-- | sysdeps/m68k/lshift.S | 150 | ||||
| -rw-r--r-- | sysdeps/m68k/m68020/addmul_1.S | 75 | ||||
| -rw-r--r-- | sysdeps/m68k/m68020/mul_1.S | 83 | ||||
| -rw-r--r-- | sysdeps/m68k/m68020/submul_1.S | 75 | ||||
| -rw-r--r-- | sysdeps/m68k/rshift.S | 149 | ||||
| -rw-r--r-- | sysdeps/m68k/sub_n.S | 75 |
7 files changed, 498 insertions, 184 deletions
diff --git a/sysdeps/m68k/add_n.S b/sysdeps/m68k/add_n.S index ea7a4458ea..754af9f469 100644 --- a/sysdeps/m68k/add_n.S +++ b/sysdeps/m68k/add_n.S @@ -1,7 +1,7 @@ /* mc68020 __mpn_add_n -- Add two limb vectors of the same length > 0 and store sum in a third limb vector. -Copyright (C) 1992, 1994 Free Software Foundation, Inc. +Copyright (C) 1992, 1994, 1996 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -27,50 +27,53 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ size (sp + 12) */ +#include "sysdep.h" #include "asm-syntax.h" TEXT ALIGN - GLOBL ___mpn_add_n + GLOBL C_SYMBOL_NAME(__mpn_add_n) -LAB(___mpn_add_n) +C_SYMBOL_NAME(__mpn_add_n:) +PROLOG(__mpn_add_n) /* Save used registers on the stack. */ - INSN2(move,l ,MEM_PREDEC(sp),d2) - INSN2(move,l ,MEM_PREDEC(sp),a2) + movel R(d2),MEM_PREDEC(sp) + movel R(a2),MEM_PREDEC(sp) /* Copy the arguments to registers. Better use movem? */ - INSN2(move,l ,a2,MEM_DISP(sp,12)) - INSN2(move,l ,a0,MEM_DISP(sp,16)) - INSN2(move,l ,a1,MEM_DISP(sp,20)) - INSN2(move,l ,d2,MEM_DISP(sp,24)) - - INSN2(eor,w ,d2,#1) - INSN2(lsr,l ,d2,#1) - bcc L1 - INSN2(subq,l ,d2,#1) /* clears cy as side effect */ - -LAB(Loop) - INSN2(move,l ,d0,MEM_POSTINC(a0)) - INSN2(move,l ,d1,MEM_POSTINC(a1)) - INSN2(addx,l ,d0,d1) - INSN2(move,l ,MEM_POSTINC(a2),d0) -LAB(L1) INSN2(move,l ,d0,MEM_POSTINC(a0)) - INSN2(move,l ,d1,MEM_POSTINC(a1)) - INSN2(addx,l ,d0,d1) - INSN2(move,l ,MEM_POSTINC(a2),d0) - - dbf d2,Loop /* loop until 16 lsb of %4 == -1 */ - INSN2(subx,l ,d0,d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */ - INSN2(sub,l ,d2,#0x10000) - bcs L2 - INSN2(add,l ,d0,d0) /* restore cy */ - bra Loop - -LAB(L2) - INSN1(neg,l ,d0) + movel MEM_DISP(sp,12),R(a2) + movel MEM_DISP(sp,16),R(a0) + movel MEM_DISP(sp,20),R(a1) + movel MEM_DISP(sp,24),R(d2) + + eorw #1,R(d2) + lsrl #1,R(d2) + bcc L(L1) + subql #1,R(d2) /* clears cy as side effect */ + +L(Loop:) + movel MEM_POSTINC(a0),R(d0) + movel MEM_POSTINC(a1),R(d1) + addxl R(d1),R(d0) + movel R(d0),MEM_POSTINC(a2) +L(L1:) movel MEM_POSTINC(a0),R(d0) + movel MEM_POSTINC(a1),R(d1) + addxl R(d1),R(d0) + movel R(d0),MEM_POSTINC(a2) + + dbf R(d2),L(Loop) /* loop until 16 lsb of %4 == -1 */ + subxl R(d0),R(d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */ + subl #0x10000,R(d2) + bcs L(L2) + addl R(d0),R(d0) /* restore cy */ + bra L(Loop) + +L(L2:) + negl R(d0) /* Restore used registers from stack frame. */ - INSN2(move,l ,a2,MEM_POSTINC(sp)) - INSN2(move,l ,d2,MEM_POSTINC(sp)) + movel MEM_POSTINC(sp),R(a2) + movel MEM_POSTINC(sp),R(d2) rts +EPILOG(__mpn_add_n) diff --git a/sysdeps/m68k/lshift.S b/sysdeps/m68k/lshift.S new file mode 100644 index 0000000000..c58594a01b --- /dev/null +++ b/sysdeps/m68k/lshift.S @@ -0,0 +1,150 @@ +/* mc68020 __mpn_lshift -- Shift left a low-level natural-number integer. + +Copyright (C) 1996 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 Library General Public License as published by +the Free Software Foundation; either version 2 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 Library General Public +License for more details. + +You should have received a copy of the GNU Library General Public License +along with the GNU MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* + 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 + ALIGN + GLOBL C_SYMBOL_NAME(__mpn_lshift) + +C_SYMBOL_NAME(__mpn_lshift:) +PROLOG(__mpn_lshift) + +/* Save used registers on the stack. */ + moveml R(d2)-R(d6)/R(a2),MEM_PREDEC(sp) + +/* 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(s_ptr),R(res_ptr) + bls L(Lspecial) /* jump if s_ptr >= res_ptr */ +#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020)) + lea MEM_INDX1(s_ptr,s_size,l,4),R(a2) +#else /* not mc68020 */ + movel R(s_size),R(d0) + asll #2,R(d0) + lea MEM_INDX(s_ptr,d0,l),R(a2) +#endif + cmpl R(res_ptr),R(a2) + bls L(Lspecial) /* jump if res_ptr >= s_ptr + s_size */ + +L(Lnormal:) + moveql #32,R(d5) + subl R(cnt),R(d5) + +#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 + movel MEM_PREDEC(s_ptr),R(d2) + movel R(d2),R(d0) + lsrl R(d5),R(d0) /* compute carry limb */ + + lsll 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_PREDEC(s_ptr),R(d2) + movel R(d2),R(d3) + lsrl R(d5),R(d3) + orl R(d3),R(d1) + movel R(d1),MEM_PREDEC(res_ptr) + lsll R(cnt),R(d2) +L(L1:) + movel MEM_PREDEC(s_ptr),R(d1) + movel R(d1),R(d3) + lsrl R(d5),R(d3) + orl R(d3),R(d2) + movel R(d2),MEM_PREDEC(res_ptr) + lsll R(cnt),R(d1) + + dbf R(s_size),L(Loop) + subl #0x10000,R(s_size) + bcc L(Loop) + +L(Lend:) + movel R(d1),MEM_PREDEC(res_ptr) /* store least significant limb */ + +/* Restore used registers from stack frame. */ + moveml MEM_POSTINC(sp),R(d2)-R(d6)/R(a2) + rts + +/* We loop from least significant end of the arrays, which is only + permissable if the source and destination don't overlap, since the + function is documented to work for overlapping source and destination. */ + +L(Lspecial:) + 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_POSTINC(s_ptr),R(d2) + addxl R(d2),R(d2) + movel R(d2),MEM_POSTINC(res_ptr) +L(LL1:) + movel MEM_POSTINC(s_ptr),R(d2) + addxl R(d2),R(d2) + movel R(d2),MEM_POSTINC(res_ptr) + + dbf R(s_size),L(LLoop) + addxl R(d0),R(d0) /* save cy in lsb */ + subl #0x10000,R(s_size) + bcs L(LLend) + lsrl #1,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) + rts +EPILOG(__mpn_lshift) diff --git a/sysdeps/m68k/m68020/addmul_1.S b/sysdeps/m68k/m68020/addmul_1.S index 3f244c40b4..169f1135be 100644 --- a/sysdeps/m68k/m68020/addmul_1.S +++ b/sysdeps/m68k/m68020/addmul_1.S @@ -1,7 +1,7 @@ /* mc68020 __mpn_addmul_1 -- Multiply a limb vector with a limb and add the result to a second limb vector. -Copyright (C) 1992, 1994 Free Software Foundation, Inc. +Copyright (C) 1992, 1994, 1996 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -23,58 +23,61 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ INPUT PARAMETERS res_ptr (sp + 4) s1_ptr (sp + 8) - size (sp + 12) + s1_size (sp + 12) s2_limb (sp + 16) */ +#include "sysdep.h" #include "asm-syntax.h" TEXT ALIGN - GLOBL ___mpn_addmul_1 + GLOBL C_SYMBOL_NAME(__mpn_addmul_1) -LAB(___mpn_addmul_1) +C_SYMBOL_NAME(__mpn_addmul_1:) +PROLOG(__mpn_addmul_1) #define res_ptr a0 #define s1_ptr a1 -#define size d2 +#define s1_size d2 #define s2_limb d4 /* Save used registers on the stack. */ - INSN2(movem,l ,MEM_PREDEC(sp),d2-d5) + moveml R(d2)-R(d5),MEM_PREDEC(sp) /* Copy the arguments to registers. Better use movem? */ - INSN2(move,l ,res_ptr,MEM_DISP(sp,20)) - INSN2(move,l ,s1_ptr,MEM_DISP(sp,24)) - INSN2(move,l ,size,MEM_DISP(sp,28)) - INSN2(move,l ,s2_limb,MEM_DISP(sp,32)) - - INSN2(eor,w ,size,#1) - INSN1(clr,l ,d1) - INSN1(clr,l ,d5) - INSN2(lsr,l ,size,#1) - bcc L1 - INSN2(subq,l ,size,#1) - INSN2(sub,l ,d0,d0) /* (d0,cy) <= (0,0) */ - -LAB(Loop) - INSN2(move,l ,d3,MEM_POSTINC(s1_ptr)) - INSN2(mulu,l ,d1:d3,s2_limb) - INSN2(addx,l ,d3,d0) - INSN2(addx,l ,d1,d5) - INSN2(add,l ,MEM_POSTINC(res_ptr),d3) -LAB(L1) INSN2(move,l ,d3,MEM_POSTINC(s1_ptr)) - INSN2(mulu,l ,d0:d3,s2_limb) - INSN2(addx,l ,d3,d1) - INSN2(addx,l ,d0,d5) - INSN2(add,l ,MEM_POSTINC(res_ptr),d3) - - dbf size,Loop - INSN2(addx,l ,d0,d5) - INSN2(sub,l ,size,#0x10000) - bcc Loop + 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. */ - INSN2(movem,l ,d2-d5,MEM_POSTINC(sp)) + moveml MEM_POSTINC(sp),R(d2)-R(d5) rts +EPILOG(__mpn_addmul_1) diff --git a/sysdeps/m68k/m68020/mul_1.S b/sysdeps/m68k/m68020/mul_1.S index 548ca0091b..4db1ccac25 100644 --- a/sysdeps/m68k/m68020/mul_1.S +++ b/sysdeps/m68k/m68020/mul_1.S @@ -1,7 +1,7 @@ /* mc68020 __mpn_mul_1 -- Multiply a limb vector with a limb and store the result in a second limb vector. -Copyright (C) 1992, 1994 Free Software Foundation, Inc. +Copyright (C) 1992, 1994, 1996 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -23,65 +23,68 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ INPUT PARAMETERS res_ptr (sp + 4) s1_ptr (sp + 8) - size (sp + 12) + s1_size (sp + 12) s2_limb (sp + 16) */ +#include "sysdep.h" #include "asm-syntax.h" TEXT ALIGN - GLOBL ___mpn_mul_1 + GLOBL C_SYMBOL_NAME(__mpn_mul_1) -LAB(___mpn_mul_1) +C_SYMBOL_NAME(__mpn_mul_1:) +PROLOG(__mpn_mul_1) #define res_ptr a0 #define s1_ptr a1 -#define size d2 +#define s1_size d2 #define s2_limb d4 /* Save used registers on the stack. */ - INSN2(movem,l ,MEM_PREDEC(sp),d2-d4) + moveml R(d2)-R(d4),MEM_PREDEC(sp) #if 0 - INSN2(move,l ,MEM_PREDEC(sp),d2) - INSN2(move,l ,MEM_PREDEC(sp),d3) - INSN2(move,l ,MEM_PREDEC(sp),d4) + movel R(d2),MEM_PREDEC(sp) + movel R(d3),MEM_PREDEC(sp) + movel R(d4),MEM_PREDEC(sp) #endif /* Copy the arguments to registers. Better use movem? */ - INSN2(move,l ,res_ptr,MEM_DISP(sp,16)) - INSN2(move,l ,s1_ptr,MEM_DISP(sp,20)) - INSN2(move,l ,size,MEM_DISP(sp,24)) - INSN2(move,l ,s2_limb,MEM_DISP(sp,28)) - - INSN2(eor,w ,size,#1) - INSN1(clr,l ,d1) - INSN2(lsr,l ,size,#1) - bcc L1 - INSN2(subq,l ,size,#1) - INSN2(sub,l ,d0,d0) /* (d0,cy) <= (0,0) */ - -LAB(Loop) - INSN2(move,l ,d3,MEM_POSTINC(s1_ptr)) - INSN2(mulu,l ,d1:d3,s2_limb) - INSN2(addx,l ,d3,d0) - INSN2(move,l ,MEM_POSTINC(res_ptr),d3) -LAB(L1) INSN2(move,l ,d3,MEM_POSTINC(s1_ptr)) - INSN2(mulu,l ,d0:d3,s2_limb) - INSN2(addx,l ,d3,d1) - INSN2(move,l ,MEM_POSTINC(res_ptr),d3) - - dbf size,Loop - INSN1(clr,l ,d3) - INSN2(addx,l ,d0,d3) - INSN2(sub,l ,size,#0x10000) - bcc Loop + movel MEM_DISP(sp,16),R(res_ptr) + movel MEM_DISP(sp,20),R(s1_ptr) + movel MEM_DISP(sp,24),R(s1_size) + movel MEM_DISP(sp,28),R(s2_limb) + + eorw #1,R(s1_size) + clrl R(d1) + 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) + movel 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) + movel R(d3),MEM_POSTINC(res_ptr) + + dbf R(s1_size),L(Loop) + clrl R(d3) + addxl R(d3),R(d0) + subl #0x10000,R(s1_size) + bcc L(Loop) /* Restore used registers from stack frame. */ - INSN2(movem,l ,d2-d4,MEM_POSTINC(sp)) + moveml MEM_POSTINC(sp),R(d2)-R(d4) #if 0 - INSN2(move,l ,d4,MEM_POSTINC(sp)) - INSN2(move,l ,d3,MEM_POSTINC(sp)) - INSN2(move,l ,d2,MEM_POSTINC(sp)) + movel MEM_POSTINC(sp),R(d4) + movel MEM_POSTINC(sp),R(d3) + movel MEM_POSTINC(sp),R(d2) #endif rts +EPILOG(__mpn_mul_1) diff --git a/sysdeps/m68k/m68020/submul_1.S b/sysdeps/m68k/m68020/submul_1.S index ef7f39de7a..cf30029b2f 100644 --- a/sysdeps/m68k/m68020/submul_1.S +++ b/sysdeps/m68k/m68020/submul_1.S @@ -1,7 +1,7 @@ /* mc68020 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract the result from a second limb vector. -Copyright (C) 1992, 1994 Free Software Foundation, Inc. +Copyright (C) 1992, 1994, 1996 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -23,58 +23,61 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ INPUT PARAMETERS res_ptr (sp + 4) s1_ptr (sp + 8) - size (sp + 12) + s1_size (sp + 12) s2_limb (sp + 16) */ +#include "sysdep.h" #include "asm-syntax.h" TEXT ALIGN - GLOBL ___mpn_submul_1 + GLOBL C_SYMBOL_NAME(__mpn_submul_1) -LAB(___mpn_submul_1) +C_SYMBOL_NAME(__mpn_submul_1:) +PROLOG(__mpn_submul_1) #define res_ptr a0 #define s1_ptr a1 -#define size d2 +#define s1_size d2 #define s2_limb d4 /* Save used registers on the stack. */ - INSN2(movem,l ,MEM_PREDEC(sp),d2-d5) + moveml R(d2)-R(d5),MEM_PREDEC(sp) /* Copy the arguments to registers. Better use movem? */ - INSN2(move,l ,res_ptr,MEM_DISP(sp,20)) - INSN2(move,l ,s1_ptr,MEM_DISP(sp,24)) - INSN2(move,l ,size,MEM_DISP(sp,28)) - INSN2(move,l ,s2_limb,MEM_DISP(sp,32)) - - INSN2(eor,w ,size,#1) - INSN1(clr,l ,d1) - INSN1(clr,l ,d5) - INSN2(lsr,l ,size,#1) - bcc L1 - INSN2(subq,l ,size,#1) - INSN2(sub,l ,d0,d0) /* (d0,cy) <= (0,0) */ - -LAB(Loop) - INSN2(move,l ,d3,MEM_POSTINC(s1_ptr)) - INSN2(mulu,l ,d1:d3,s2_limb) - INSN2(addx,l ,d3,d0) - INSN2(addx,l ,d1,d5) - INSN2(sub,l ,MEM_POSTINC(res_ptr),d3) -LAB(L1) INSN2(move,l ,d3,MEM_POSTINC(s1_ptr)) - INSN2(mulu,l ,d0:d3,s2_limb) - INSN2(addx,l ,d3,d1) - INSN2(addx,l ,d0,d5) - INSN2(sub,l ,MEM_POSTINC(res_ptr),d3) - - dbf size,Loop - INSN2(addx,l ,d0,d5) - INSN2(sub,l ,size,#0x10000) - bcc Loop + 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) + subl 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) + subl 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. */ - INSN2(movem,l ,d2-d5,MEM_POSTINC(sp)) + moveml MEM_POSTINC(sp),R(d2)-R(d5) rts +EPILOG(__mpn_submul_1) diff --git a/sysdeps/m68k/rshift.S b/sysdeps/m68k/rshift.S new file mode 100644 index 0000000000..494dfcbeab --- /dev/null +++ b/sysdeps/m68k/rshift.S @@ -0,0 +1,149 @@ +/* mc68020 __mpn_rshift -- Shift right a low-level natural-number integer. + +Copyright (C) 1996 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 Library General Public License as published by +the Free Software Foundation; either version 2 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 Library General Public +License for more details. + +You should have received a copy of the GNU Library General Public License +along with the GNU MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* + 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 + ALIGN + GLOBL C_SYMBOL_NAME(__mpn_rshift) + +C_SYMBOL_NAME(__mpn_rshift:) +PROLOG(__mpn_rshift) +/* Save used registers on the stack. */ + moveml R(d2)-R(d6)/R(a2),MEM_PREDEC(sp) + +/* 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) + rts + +/* We loop from most significant end of the arrays, which is only + permissable if the source and destination don't overlap, since the + function is documented to work for overlapping source and destination. */ + +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) + rts +EPILOG(__mpn_rshift) diff --git a/sysdeps/m68k/sub_n.S b/sysdeps/m68k/sub_n.S index 19f0ec1568..39f5161176 100644 --- a/sysdeps/m68k/sub_n.S +++ b/sysdeps/m68k/sub_n.S @@ -1,7 +1,7 @@ /* mc68020 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and store difference in a third limb vector. -Copyright (C) 1992, 1994 Free Software Foundation, Inc. +Copyright (C) 1992, 1994, 1996 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -27,50 +27,53 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ size (sp + 12) */ +#include "sysdep.h" #include "asm-syntax.h" TEXT ALIGN - GLOBL ___mpn_sub_n + GLOBL C_SYMBOL_NAME(__mpn_sub_n) -LAB(___mpn_sub_n) +C_SYMBOL_NAME(__mpn_sub_n:) +PROLOG(__mpn_sub_n) /* Save used registers on the stack. */ - INSN2(move,l ,MEM_PREDEC(sp),d2) - INSN2(move,l ,MEM_PREDEC(sp),a2) + movel R(d2),MEM_PREDEC(sp) + movel R(a2),MEM_PREDEC(sp) /* Copy the arguments to registers. Better use movem? */ - INSN2(move,l ,a2,MEM_DISP(sp,12)) - INSN2(move,l ,a0,MEM_DISP(sp,16)) - INSN2(move,l ,a1,MEM_DISP(sp,20)) - INSN2(move,l ,d2,MEM_DISP(sp,24)) - - INSN2(eor,w ,d2,#1) - INSN2(lsr,l ,d2,#1) - bcc L1 - INSN2(subq,l ,d2,#1) /* clears cy as side effect */ - -LAB(Loop) - INSN2(move,l ,d0,MEM_POSTINC(a0)) - INSN2(move,l ,d1,MEM_POSTINC(a1)) - INSN2(subx,l ,d0,d1) - INSN2(move,l ,MEM_POSTINC(a2),d0) -LAB(L1) INSN2(move,l ,d0,MEM_POSTINC(a0)) - INSN2(move,l ,d1,MEM_POSTINC(a1)) - INSN2(subx,l ,d0,d1) - INSN2(move,l ,MEM_POSTINC(a2),d0) - - dbf d2,Loop /* loop until 16 lsb of %4 == -1 */ - INSN2(subx,l ,d0,d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */ - INSN2(sub,l ,d2,#0x10000) - bcs L2 - INSN2(add,l ,d0,d0) /* restore cy */ - bra Loop - -LAB(L2) - INSN1(neg,l ,d0) + movel MEM_DISP(sp,12),R(a2) + movel MEM_DISP(sp,16),R(a0) + movel MEM_DISP(sp,20),R(a1) + movel MEM_DISP(sp,24),R(d2) + + eorw #1,R(d2) + lsrl #1,R(d2) + bcc L(L1) + subql #1,R(d2) /* clears cy as side effect */ + +L(Loop:) + movel MEM_POSTINC(a0),R(d0) + movel MEM_POSTINC(a1),R(d1) + subxl R(d1),R(d0) + movel R(d0),MEM_POSTINC(a2) +L(L1:) movel MEM_POSTINC(a0),R(d0) + movel MEM_POSTINC(a1),R(d1) + subxl R(d1),R(d0) + movel R(d0),MEM_POSTINC(a2) + + dbf R(d2),L(Loop) /* loop until 16 lsb of %4 == -1 */ + subxl R(d0),R(d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */ + subl #0x10000,R(d2) + bcs L(L2) + addl R(d0),R(d0) /* restore cy */ + bra L(Loop) + +L(L2:) + negl R(d0) /* Restore used registers from stack frame. */ - INSN2(move,l ,a2,MEM_POSTINC(sp)) - INSN2(move,l ,d2,MEM_POSTINC(sp)) + movel MEM_POSTINC(sp),R(a2) + movel MEM_POSTINC(sp),R(d2) rts +EPILOG(__mpn_sub_n) |