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Diffstat (limited to 'ports/sysdeps/mips/add_n.S')
| -rw-r--r-- | ports/sysdeps/mips/add_n.S | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/ports/sysdeps/mips/add_n.S b/ports/sysdeps/mips/add_n.S new file mode 100644 index 0000000000..99266f11d1 --- /dev/null +++ b/ports/sysdeps/mips/add_n.S @@ -0,0 +1,121 @@ +/* MIPS2 __mpn_add_n -- Add two limb vectors of the same length > 0 and +store sum in a third limb vector. + +Copyright (C) 1995, 2000, 2002, 2003 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/>. */ + +#include <sysdep.h> + +/* INPUT PARAMETERS + res_ptr $4 + s1_ptr $5 + s2_ptr $6 + size $7 +*/ +#ifdef __PIC__ + .option pic2 +#endif +ENTRY (__mpn_add_n) + .set noreorder +#ifdef __PIC__ + .cpload t9 +#endif + .set nomacro + + lw $10,0($5) + lw $11,0($6) + + addiu $7,$7,-1 + and $9,$7,4-1 /* number of limbs in first loop */ + beq $9,$0,L(L0) /* if multiple of 4 limbs, skip first loop */ + move $2,$0 + + subu $7,$7,$9 + +L(Loop0): addiu $9,$9,-1 + lw $12,4($5) + addu $11,$11,$2 + lw $13,4($6) + sltu $8,$11,$2 + addu $11,$10,$11 + sltu $2,$11,$10 + sw $11,0($4) + or $2,$2,$8 + + addiu $5,$5,4 + addiu $6,$6,4 + move $10,$12 + move $11,$13 + bne $9,$0,L(Loop0) + addiu $4,$4,4 + +L(L0): beq $7,$0,L(end) + nop + +L(Loop): addiu $7,$7,-4 + + lw $12,4($5) + addu $11,$11,$2 + lw $13,4($6) + sltu $8,$11,$2 + addu $11,$10,$11 + sltu $2,$11,$10 + sw $11,0($4) + or $2,$2,$8 + + lw $10,8($5) + addu $13,$13,$2 + lw $11,8($6) + sltu $8,$13,$2 + addu $13,$12,$13 + sltu $2,$13,$12 + sw $13,4($4) + or $2,$2,$8 + + lw $12,12($5) + addu $11,$11,$2 + lw $13,12($6) + sltu $8,$11,$2 + addu $11,$10,$11 + sltu $2,$11,$10 + sw $11,8($4) + or $2,$2,$8 + + lw $10,16($5) + addu $13,$13,$2 + lw $11,16($6) + sltu $8,$13,$2 + addu $13,$12,$13 + sltu $2,$13,$12 + sw $13,12($4) + or $2,$2,$8 + + addiu $5,$5,16 + addiu $6,$6,16 + + bne $7,$0,L(Loop) + addiu $4,$4,16 + +L(end): addu $11,$11,$2 + sltu $8,$11,$2 + addu $11,$10,$11 + sltu $2,$11,$10 + sw $11,0($4) + j $31 + or $2,$2,$8 + .end __mpn_add_n |