summaryrefslogtreecommitdiff
path: root/sysdeps/mips/sub_n.S
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/mips/sub_n.S')
-rw-r--r--sysdeps/mips/sub_n.S121
1 files changed, 121 insertions, 0 deletions
diff --git a/sysdeps/mips/sub_n.S b/sysdeps/mips/sub_n.S
new file mode 100644
index 0000000000..09fbf7eeff
--- /dev/null
+++ b/sysdeps/mips/sub_n.S
@@ -0,0 +1,121 @@
+/* MIPS2 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+store difference in a third limb vector.
+
+Copyright (C) 1995 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., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include <sysdep.h>
+
+/* INPUT PARAMETERS
+ res_ptr $4
+ s1_ptr $5
+ s2_ptr $6
+ size $7
+*/
+#ifdef PIC
+ .option pic2
+#endif
+ENTRY (__mpn_sub_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,.L0 /* if multiple of 4 limbs, skip first loop */
+ move $2,$0
+
+ subu $7,$7,$9
+
+.Loop0: addiu $9,$9,-1
+ lw $12,4($5)
+ addu $11,$11,$2
+ lw $13,4($6)
+ sltu $8,$11,$2
+ subu $11,$10,$11
+ sltu $2,$10,$11
+ 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,.Loop0
+ addiu $4,$4,4
+
+.L0: beq $7,$0,.Lend
+ nop
+
+.Loop: addiu $7,$7,-4
+
+ lw $12,4($5)
+ addu $11,$11,$2
+ lw $13,4($6)
+ sltu $8,$11,$2
+ subu $11,$10,$11
+ sltu $2,$10,$11
+ sw $11,0($4)
+ or $2,$2,$8
+
+ lw $10,8($5)
+ addu $13,$13,$2
+ lw $11,8($6)
+ sltu $8,$13,$2
+ subu $13,$12,$13
+ sltu $2,$12,$13
+ sw $13,4($4)
+ or $2,$2,$8
+
+ lw $12,12($5)
+ addu $11,$11,$2
+ lw $13,12($6)
+ sltu $8,$11,$2
+ subu $11,$10,$11
+ sltu $2,$10,$11
+ sw $11,8($4)
+ or $2,$2,$8
+
+ lw $10,16($5)
+ addu $13,$13,$2
+ lw $11,16($6)
+ sltu $8,$13,$2
+ subu $13,$12,$13
+ sltu $2,$12,$13
+ sw $13,12($4)
+ or $2,$2,$8
+
+ addiu $5,$5,16
+ addiu $6,$6,16
+
+ bne $7,$0,.Loop
+ addiu $4,$4,16
+
+.Lend: addu $11,$11,$2
+ sltu $8,$11,$2
+ subu $11,$10,$11
+ sltu $2,$10,$11
+ sw $11,0($4)
+ j $31
+ or $2,$2,$8