diff options
Diffstat (limited to 'sysdeps/m88k')
| -rw-r--r-- | sysdeps/m88k/ffs.c | 42 | ||||
| -rw-r--r-- | sysdeps/m88k/m88100/add_n.S | 133 | ||||
| -rw-r--r-- | sysdeps/m88k/m88100/mul_1.S | 127 | ||||
| -rw-r--r-- | sysdeps/m88k/m88100/sub_n.S | 134 | ||||
| -rw-r--r-- | sysdeps/m88k/m88110/mul_1.S | 80 |
5 files changed, 516 insertions, 0 deletions
diff --git a/sysdeps/m88k/ffs.c b/sysdeps/m88k/ffs.c new file mode 100644 index 0000000..effca9a --- /dev/null +++ b/sysdeps/m88k/ffs.c @@ -0,0 +1,42 @@ +/* ffs -- find first set bit in a word, counted from least significant end. + For Motorola 88000. + Copyright (C) 1991, 1992 Free Software Foundation, Inc. + Contributed by Torbjorn Granlund (tege@sics.se). + +The GNU C 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 C 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 C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <bstring.h> + +#undef ffs + +#ifdef __GNUC__ + +int +DEFUN(ffs, (x), int x) +{ + int cnt; + + if (x == 0) + return 0; + + asm ("ff1 %0,%1" : "=r" (cnt) : "r" (x & -x)); + return cnt + 1; +} + +#else +#include <sysdeps/generic/ffs.c> +#endif diff --git a/sysdeps/m88k/m88100/add_n.S b/sysdeps/m88k/m88100/add_n.S new file mode 100644 index 0000000..2107eb5 --- /dev/null +++ b/sysdeps/m88k/m88100/add_n.S @@ -0,0 +1,133 @@ +; mc88100 __mpn_add -- 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. + +; 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 General Public License as published by +; the Free Software Foundation; either version 2, 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 General Public License for more details. + +; You should have received a copy of the GNU General Public License +; along with the GNU MP Library; see the file COPYING. If not, write to +; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + +; INPUT PARAMETERS +; res_ptr r2 +; s1_ptr r3 +; s2_ptr r4 +; size r5 + +; This code has been optimized to run one instruction per clock, avoiding +; load stalls and writeback contention. As a result, the instruction +; order is not always natural. + +; The speed is approximately 4.3 clocks/limb + 18 clocks/limb-vector. + +#include "sysdep.h" + +ENTRY (__mpn_add_n) + ld r6,r3,0 ; read first limb from s1_ptr + extu r10,r5,4 + ld r7,r4,0 ; read first limb from s2_ptr + + subu.co r5,r0,r5 ; (clear carry as side effect) + mak r5,r5,4<4> + bcnd eq0,r5,Lzero + + or r12,r0,lo16(Lbase) + or.u r12,r12,hi16(Lbase) + addu r12,r12,r5 ; r12 is address for entering in loop + + extu r5,r5,2 ; divide by 4 + subu r2,r2,r5 ; adjust res_ptr + subu r3,r3,r5 ; adjust s1_ptr + subu r4,r4,r5 ; adjust s2_ptr + + or r8,r6,r0 + + jmp.n r12 + or r9,r7,r0 + +Loop: addu r3,r3,64 + st r8,r2,60 + addu r4,r4,64 + ld r6,r3,0 + addu r2,r2,64 + ld r7,r4,0 +Lzero: subu r10,r10,1 ; add 0 + 16r limbs (adjust loop counter) +Lbase: ld r8,r3,4 + addu.cio r6,r6,r7 + ld r9,r4,4 + st r6,r2,0 + ld r6,r3,8 ; add 15 + 16r limbs + addu.cio r8,r8,r9 + ld r7,r4,8 + st r8,r2,4 + ld r8,r3,12 ; add 14 + 16r limbs + addu.cio r6,r6,r7 + ld r9,r4,12 + st r6,r2,8 + ld r6,r3,16 ; add 13 + 16r limbs + addu.cio r8,r8,r9 + ld r7,r4,16 + st r8,r2,12 + ld r8,r3,20 ; add 12 + 16r limbs + addu.cio r6,r6,r7 + ld r9,r4,20 + st r6,r2,16 + ld r6,r3,24 ; add 11 + 16r limbs + addu.cio r8,r8,r9 + ld r7,r4,24 + st r8,r2,20 + ld r8,r3,28 ; add 10 + 16r limbs + addu.cio r6,r6,r7 + ld r9,r4,28 + st r6,r2,24 + ld r6,r3,32 ; add 9 + 16r limbs + addu.cio r8,r8,r9 + ld r7,r4,32 + st r8,r2,28 + ld r8,r3,36 ; add 8 + 16r limbs + addu.cio r6,r6,r7 + ld r9,r4,36 + st r6,r2,32 + ld r6,r3,40 ; add 7 + 16r limbs + addu.cio r8,r8,r9 + ld r7,r4,40 + st r8,r2,36 + ld r8,r3,44 ; add 6 + 16r limbs + addu.cio r6,r6,r7 + ld r9,r4,44 + st r6,r2,40 + ld r6,r3,48 ; add 5 + 16r limbs + addu.cio r8,r8,r9 + ld r7,r4,48 + st r8,r2,44 + ld r8,r3,52 ; add 4 + 16r limbs + addu.cio r6,r6,r7 + ld r9,r4,52 + st r6,r2,48 + ld r6,r3,56 ; add 3 + 16r limbs + addu.cio r8,r8,r9 + ld r7,r4,56 + st r8,r2,52 + ld r8,r3,60 ; add 2 + 16r limbs + addu.cio r6,r6,r7 + ld r9,r4,60 + st r6,r2,56 + bcnd.n ne0,r10,Loop ; add 1 + 16r limbs + addu.cio r8,r8,r9 + + st r8,r2,60 ; store most significant limb + + jmp.n r1 + addu.ci r2,r0,r0 ; return carry-out from most sign. limb diff --git a/sysdeps/m88k/m88100/mul_1.S b/sysdeps/m88k/m88100/mul_1.S new file mode 100644 index 0000000..503897b --- /dev/null +++ b/sysdeps/m88k/m88100/mul_1.S @@ -0,0 +1,127 @@ +; mc88100 __mpn_mul_1 -- Multiply a limb vector with a single limb and +; store the product in a second limb vector. + +; Copyright (C) 1992, 1994 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 General Public License as published by +; the Free Software Foundation; either version 2, 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 General Public License for more details. + +; You should have received a copy of the GNU General Public License +; along with the GNU MP Library; see the file COPYING. If not, write to +; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + +; INPUT PARAMETERS +; res_ptr r2 +; s1_ptr r3 +; size r4 +; s2_limb r5 + +; Common overhead is about 11 cycles/invocation. + +; The speed for S2_LIMB >= 0x10000 is approximately 21 cycles/limb. (The +; pipeline stalls 2 cycles due to WB contention.) + +; The speed for S2_LIMB < 0x10000 is approximately 16 cycles/limb. (The +; pipeline stalls 2 cycles due to WB contention and 1 cycle due to latency.) + +; To enhance speed: +; 1. Unroll main loop 4-8 times. +; 2. Schedule code to avoid WB contention. It might be tempting to move the +; ld instruction in the loops down to save 2 cycles (less WB contention), +; but that looses because the ultimate value will be read from outside +; the allocated space. But if we handle the ultimate multiplication in +; the tail, we can do this. +; 3. Make the multiplication with less instructions. I think the code for +; (S2_LIMB >= 0x10000) is not minimal. +; With these techniques the (S2_LIMB >= 0x10000) case would run in 17 or +; less cycles/limb; the (S2_LIMB < 0x10000) case would run in 11 +; cycles/limb. (Assuming infinite unrolling.) + +#include "sysdep.h" + +ENTRY (__mpn_mul_1) + + ; Make S1_PTR and RES_PTR point at the end of their blocks + ; and negate SIZE. + lda r3,r3[r4] + lda r6,r2[r4] ; RES_PTR in r6 since r2 is retval + subu r4,r0,r4 + + addu.co r2,r0,r0 ; r2 = cy = 0 + ld r9,r3[r4] + mask r7,r5,0xffff ; r7 = lo(S2_LIMB) + extu r8,r5,16 ; r8 = hi(S2_LIMB) + bcnd.n eq0,r8,Lsmall ; jump if (hi(S2_LIMB) == 0) + subu r6,r6,4 + +; General code for any value of S2_LIMB. + + ; Make a stack frame and save r25 and r26 + subu r31,r31,16 + st.d r25,r31,8 + + ; Enter the loop in the middle + br.n L1 + addu r4,r4,1 + +Loop: + ld r9,r3[r4] + st r26,r6[r4] +; bcnd ne0,r0,0 ; bubble + addu r4,r4,1 +L1: mul r26,r9,r5 ; low word of product mul_1 WB ld + mask r12,r9,0xffff ; r12 = lo(s1_limb) mask_1 + mul r11,r12,r7 ; r11 = prod_0 mul_2 WB mask_1 + mul r10,r12,r8 ; r10 = prod_1a mul_3 + extu r13,r9,16 ; r13 = hi(s1_limb) extu_1 WB mul_1 + mul r12,r13,r7 ; r12 = prod_1b mul_4 WB extu_1 + mul r25,r13,r8 ; r25 = prod_2 mul_5 WB mul_2 + extu r11,r11,16 ; r11 = hi(prod_0) extu_2 WB mul_3 + addu r10,r10,r11 ; addu_1 WB extu_2 +; bcnd ne0,r0,0 ; bubble WB addu_1 + addu.co r10,r10,r12 ; WB mul_4 + mask.u r10,r10,0xffff ; move the 16 most significant bits... + addu.ci r10,r10,r0 ; ...to the low half of the word... + rot r10,r10,16 ; ...and put carry in pos 16. + addu.co r26,r26,r2 ; add old carry limb + bcnd.n ne0,r4,Loop + addu.ci r2,r25,r10 ; compute new carry limb + + st r26,r6[r4] + ld.d r25,r31,8 + jmp.n r1 + addu r31,r31,16 + +; Fast code for S2_LIMB < 0x10000 +Lsmall: + ; Enter the loop in the middle + br.n SL1 + addu r4,r4,1 + +SLoop: + ld r9,r3[r4] ; + st r8,r6[r4] ; + addu r4,r4,1 ; +SL1: mul r8,r9,r5 ; low word of product + mask r12,r9,0xffff ; r12 = lo(s1_limb) + extu r13,r9,16 ; r13 = hi(s1_limb) + mul r11,r12,r7 ; r11 = prod_0 + mul r12,r13,r7 ; r12 = prod_1b + addu.cio r8,r8,r2 ; add old carry limb + extu r10,r11,16 ; r11 = hi(prod_0) + addu r10,r10,r12 ; + bcnd.n ne0,r4,SLoop + extu r2,r10,16 ; r2 = new carry limb + + jmp.n r1 + st r8,r6[r4] diff --git a/sysdeps/m88k/m88100/sub_n.S b/sysdeps/m88k/m88100/sub_n.S new file mode 100644 index 0000000..927ece4 --- /dev/null +++ b/sysdeps/m88k/m88100/sub_n.S @@ -0,0 +1,134 @@ +; mc88100 __mpn_sub -- 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. + +; 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 General Public License as published by +; the Free Software Foundation; either version 2, 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 General Public License for more details. + +; You should have received a copy of the GNU General Public License +; along with the GNU MP Library; see the file COPYING. If not, write to +; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + +; INPUT PARAMETERS +; res_ptr r2 +; s1_ptr r3 +; s2_ptr r4 +; size r5 + +; This code has been optimized to run one instruction per clock, avoiding +; load stalls and writeback contention. As a result, the instruction +; order is not always natural. + +; The speed is approximately 4.3 clocks/limb + 18 clocks/limb-vector. + +#include "sysdep.h" + +ENTRY (__mpn_sub_n) + ld r6,r3,0 ; read first limb from s1_ptr + extu r10,r5,4 + ld r7,r4,0 ; read first limb from s2_ptr + + subu.co r5,r0,r5 ; (clear carry as side effect) + mak r5,r5,4<4> + bcnd eq0,r5,Lzero + + or r12,r0,lo16(Lbase) + or.u r12,r12,hi16(Lbase) + addu r12,r12,r5 ; r12 is address for entering in loop + + extu r5,r5,2 ; divide by 4 + subu r2,r2,r5 ; adjust res_ptr + subu r3,r3,r5 ; adjust s1_ptr + subu r4,r4,r5 ; adjust s2_ptr + + or r8,r6,r0 + + jmp.n r12 + or r9,r7,r0 + +Loop: addu r3,r3,64 + st r8,r2,60 + addu r4,r4,64 + ld r6,r3,0 + addu r2,r2,64 + ld r7,r4,0 +Lzero: subu r10,r10,1 ; subtract 0 + 16r limbs (adjust loop counter) +Lbase: ld r8,r3,4 + subu.cio r6,r6,r7 + ld r9,r4,4 + st r6,r2,0 + ld r6,r3,8 ; subtract 15 + 16r limbs + subu.cio r8,r8,r9 + ld r7,r4,8 + st r8,r2,4 + ld r8,r3,12 ; subtract 14 + 16r limbs + subu.cio r6,r6,r7 + ld r9,r4,12 + st r6,r2,8 + ld r6,r3,16 ; subtract 13 + 16r limbs + subu.cio r8,r8,r9 + ld r7,r4,16 + st r8,r2,12 + ld r8,r3,20 ; subtract 12 + 16r limbs + subu.cio r6,r6,r7 + ld r9,r4,20 + st r6,r2,16 + ld r6,r3,24 ; subtract 11 + 16r limbs + subu.cio r8,r8,r9 + ld r7,r4,24 + st r8,r2,20 + ld r8,r3,28 ; subtract 10 + 16r limbs + subu.cio r6,r6,r7 + ld r9,r4,28 + st r6,r2,24 + ld r6,r3,32 ; subtract 9 + 16r limbs + subu.cio r8,r8,r9 + ld r7,r4,32 + st r8,r2,28 + ld r8,r3,36 ; subtract 8 + 16r limbs + subu.cio r6,r6,r7 + ld r9,r4,36 + st r6,r2,32 + ld r6,r3,40 ; subtract 7 + 16r limbs + subu.cio r8,r8,r9 + ld r7,r4,40 + st r8,r2,36 + ld r8,r3,44 ; subtract 6 + 16r limbs + subu.cio r6,r6,r7 + ld r9,r4,44 + st r6,r2,40 + ld r6,r3,48 ; subtract 5 + 16r limbs + subu.cio r8,r8,r9 + ld r7,r4,48 + st r8,r2,44 + ld r8,r3,52 ; subtract 4 + 16r limbs + subu.cio r6,r6,r7 + ld r9,r4,52 + st r6,r2,48 + ld r6,r3,56 ; subtract 3 + 16r limbs + subu.cio r8,r8,r9 + ld r7,r4,56 + st r8,r2,52 + ld r8,r3,60 ; subtract 2 + 16r limbs + subu.cio r6,r6,r7 + ld r9,r4,60 + st r6,r2,56 + bcnd.n ne0,r10,Loop ; subtract 1 + 16r limbs + subu.cio r8,r8,r9 + + st r8,r2,60 ; store most significant limb + + addu.ci r2,r0,r0 ; return carry-out from most sign. limb + jmp.n r1 + xor r2,r2,1 diff --git a/sysdeps/m88k/m88110/mul_1.S b/sysdeps/m88k/m88110/mul_1.S new file mode 100644 index 0000000..7a07623 --- /dev/null +++ b/sysdeps/m88k/m88110/mul_1.S @@ -0,0 +1,80 @@ +; mc88110 __mpn_mul_1 -- Multiply a limb vector with a single limb and +; store the product in a second limb vector. + +; Copyright (C) 1992, 1994 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 General Public License as published by +; the Free Software Foundation; either version 2, 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 General Public License for more details. + +; You should have received a copy of the GNU General Public License +; along with the GNU MP Library; see the file COPYING. If not, write to +; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + +; INPUT PARAMETERS +; res_ptr r2 +; s1_ptr r3 +; size r4 +; s2_limb r5 + +#include "sysdep.h" + +ENTRY (__mpn_mul_1) + ld r6,r3,0 + sub r4,r0,r4 + sub r3,r3,r4 ; r3 is offset s1_ptr + sub r2,r2,r4 + sub r8,r2,8 ; r8 is offset res_ptr + mulu.d r10,r6,r5 + + addu r4,r4,1 + bcnd eq0,r4,Lend + addu.co r2,r0,0 ; clear cy_limb + +Loop: ld r6,r3[r4] + addu.cio r9,r11,r2 + or r2,r10,r0 ; could be avoided if unrolled + addu r4,r4,1 + mulu.d r10,r6,r5 + bcnd ne0,r4,Loop + st r9,r8[r4] + +Lend: addu.cio r9,r11,r2 + st r9,r8,4 + jmp.n r1 + addu.ci r2,r10,r0 + +; This is the Right Way to do this on '110. 4 cycles / 64-bit limb. +; ld.d r10, +; mulu.d +; addu.cio +; addu.cio +; st.d +; mulu.d ,r11,r5 +; ld.d r12, +; mulu.d ,r10,r5 +; addu.cio +; addu.cio +; st.d +; mulu.d +; ld.d r10, +; mulu.d +; addu.cio +; addu.cio +; st.d +; mulu.d +; ld.d r10, +; mulu.d +; addu.cio +; addu.cio +; st.d +; mulu.d |