--- /dev/null
+; HP-PA 7100/7200 __mpn_submul_1 -- Multiply a limb vector with a limb and
+; subtract the result from a second 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.
+
+; INPUT PARAMETERS
+#define res_ptr %r26
+#define s1_ptr %r25
+#define size %r24
+#define s2_limb %r23
+
+#define cylimb %r28
+#define s0 %r19
+#define s1 %r20
+#define s2 %r3
+#define s3 %r4
+#define lo0 %r21
+#define lo1 %r5
+#define lo2 %r6
+#define lo3 %r7
+#define hi0 %r22
+#define hi1 %r23 /* safe to reuse */
+#define hi2 %r29
+#define hi3 %r1
+
+ .code
+ .export __mpn_submul_1
+__mpn_submul_1
+ .proc
+ .callinfo frame=128,no_calls
+ .entry
+
+ ldo 128(%r30),%r30
+ stws s2_limb,-16(%r30)
+ add %r0,%r0,cylimb ; clear cy and cylimb
+ addib,< -4,size,L$few_limbs
+ fldws -16(%r30),%fr31R
+
+ ldo -112(%r30),%r31
+ stw %r3,-96(%r30)
+ stw %r4,-92(%r30)
+ stw %r5,-88(%r30)
+ stw %r6,-84(%r30)
+ stw %r7,-80(%r30)
+
+ bb,>=,n s1_ptr,29,L$0
+
+ fldws,ma 4(s1_ptr),%fr4
+ ldws 0(res_ptr),s0
+ xmpyu %fr4,%fr31R,%fr5
+ fstds %fr5,-16(%r31)
+ ldws -16(%r31),cylimb
+ ldws -12(%r31),lo0
+ sub s0,lo0,s0
+ add s0,lo0,%r0 ; invert cy
+ addib,< -1,size,L$few_limbs
+ stws,ma s0,4(res_ptr)
+
+; start software pipeline ----------------------------------------------------
+L$0 fldds,ma 8(s1_ptr),%fr4
+ fldds,ma 8(s1_ptr),%fr8
+
+ xmpyu %fr4L,%fr31R,%fr5
+ xmpyu %fr4R,%fr31R,%fr6
+ xmpyu %fr8L,%fr31R,%fr9
+ xmpyu %fr8R,%fr31R,%fr10
+
+ fstds %fr5,-16(%r31)
+ fstds %fr6,-8(%r31)
+ fstds %fr9,0(%r31)
+ fstds %fr10,8(%r31)
+
+ ldws -16(%r31),hi0
+ ldws -12(%r31),lo0
+ ldws -8(%r31),hi1
+ ldws -4(%r31),lo1
+ ldws 0(%r31),hi2
+ ldws 4(%r31),lo2
+ ldws 8(%r31),hi3
+ ldws 12(%r31),lo3
+
+ addc lo0,cylimb,lo0
+ addc lo1,hi0,lo1
+ addc lo2,hi1,lo2
+ addc lo3,hi2,lo3
+
+ addib,< -4,size,L$end
+ addc %r0,hi3,cylimb ; propagate carry into cylimb
+; main loop ------------------------------------------------------------------
+L$loop fldds,ma 8(s1_ptr),%fr4
+ fldds,ma 8(s1_ptr),%fr8
+
+ ldws 0(res_ptr),s0
+ xmpyu %fr4L,%fr31R,%fr5
+ ldws 4(res_ptr),s1
+ xmpyu %fr4R,%fr31R,%fr6
+ ldws 8(res_ptr),s2
+ xmpyu %fr8L,%fr31R,%fr9
+ ldws 12(res_ptr),s3
+ xmpyu %fr8R,%fr31R,%fr10
+
+ fstds %fr5,-16(%r31)
+ sub s0,lo0,s0
+ fstds %fr6,-8(%r31)
+ subb s1,lo1,s1
+ fstds %fr9,0(%r31)
+ subb s2,lo2,s2
+ fstds %fr10,8(%r31)
+ subb s3,lo3,s3
+ subb %r0,%r0,lo0 ; these two insns ...
+ add lo0,lo0,%r0 ; ... just invert cy
+
+ ldws -16(%r31),hi0
+ ldws -12(%r31),lo0
+ ldws -8(%r31),hi1
+ ldws -4(%r31),lo1
+ ldws 0(%r31),hi2
+ ldws 4(%r31),lo2
+ ldws 8(%r31),hi3
+ ldws 12(%r31),lo3
+
+ addc lo0,cylimb,lo0
+ stws,ma s0,4(res_ptr)
+ addc lo1,hi0,lo1
+ stws,ma s1,4(res_ptr)
+ addc lo2,hi1,lo2
+ stws,ma s2,4(res_ptr)
+ addc lo3,hi2,lo3
+ stws,ma s3,4(res_ptr)
+
+ addib,>= -4,size,L$loop
+ addc %r0,hi3,cylimb ; propagate carry into cylimb
+; finish software pipeline ---------------------------------------------------
+L$end ldws 0(res_ptr),s0
+ ldws 4(res_ptr),s1
+ ldws 8(res_ptr),s2
+ ldws 12(res_ptr),s3
+
+ sub s0,lo0,s0
+ stws,ma s0,4(res_ptr)
+ subb s1,lo1,s1
+ stws,ma s1,4(res_ptr)
+ subb s2,lo2,s2
+ stws,ma s2,4(res_ptr)
+ subb s3,lo3,s3
+ stws,ma s3,4(res_ptr)
+ subb %r0,%r0,lo0 ; these two insns ...
+ add lo0,lo0,%r0 ; ... invert cy
+
+; restore callee-saves registers ---------------------------------------------
+ ldw -96(%r30),%r3
+ ldw -92(%r30),%r4
+ ldw -88(%r30),%r5
+ ldw -84(%r30),%r6
+ ldw -80(%r30),%r7
+
+L$few_limbs
+ addib,=,n 4,size,L$ret
+L$loop2 fldws,ma 4(s1_ptr),%fr4
+ ldws 0(res_ptr),s0
+ xmpyu %fr4,%fr31R,%fr5
+ fstds %fr5,-16(%r30)
+ ldws -16(%r30),hi0
+ ldws -12(%r30),lo0
+ addc lo0,cylimb,lo0
+ addc %r0,hi0,cylimb
+ sub s0,lo0,s0
+ add s0,lo0,%r0 ; invert cy
+ stws,ma s0,4(res_ptr)
+ addib,<> -1,size,L$loop2
+ nop
+
+L$ret addc %r0,cylimb,cylimb
+ bv 0(%r2)
+ ldo -128(%r30),%r30
+
+ .exit
+ .procend
projects / ghc-hetmet.git / blobdiff