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dnl ARM mpn_and_n, mpn_andn_n. mpn_nand_n, etc.
dnl Contributed to the GNU project by Torbjörn Granlund.
dnl Copyright 1997, 2000, 2001, 2012 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb cycles/limb
C and andn ior xor nand iorn nior xnor
C StrongARM ? ?
C XScale ? ?
C Cortex-A7 ? ?
C Cortex-A8 ? ?
C Cortex-A9 2.5-2.72 2.75-3
C Cortex-A15 2.25 2.75
C TODO
C * It seems that 2.25 c/l and 2.75 c/l is possible for A9.
C * Debug popping issue, see comment below.
define(`rp', `r0')
define(`up', `r1')
define(`vp', `r2')
define(`n', `r3')
define(`POSTOP')
ifdef(`OPERATION_and_n',`
define(`func', `mpn_and_n')
define(`LOGOP', `and $1, $2, $3')')
ifdef(`OPERATION_andn_n',`
define(`func', `mpn_andn_n')
define(`LOGOP', `bic $1, $2, $3')')
ifdef(`OPERATION_nand_n',`
define(`func', `mpn_nand_n')
define(`POSTOP', `mvn $1, $1')
define(`LOGOP', `and $1, $2, $3')')
ifdef(`OPERATION_ior_n',`
define(`func', `mpn_ior_n')
define(`LOGOP', `orr $1, $2, $3')')
ifdef(`OPERATION_iorn_n',`
define(`func', `mpn_iorn_n')
define(`POSTOP', `mvn $1, $1')
define(`LOGOP', `bic $1, $3, $2')')
ifdef(`OPERATION_nior_n',`
define(`func', `mpn_nior_n')
define(`POSTOP', `mvn $1, $1')
define(`LOGOP', `orr $1, $2, $3')')
ifdef(`OPERATION_xor_n',`
define(`func', `mpn_xor_n')
define(`LOGOP', `eor $1, $2, $3')')
ifdef(`OPERATION_xnor_n',`
define(`func', `mpn_xnor_n')
define(`POSTOP', `mvn $1, $1')
define(`LOGOP', `eor $1, $2, $3')')
MULFUNC_PROLOGUE(mpn_and_n mpn_andn_n mpn_nand_n mpn_ior_n mpn_iorn_n mpn_nior_n mpn_xor_n mpn_xnor_n)
ASM_START()
PROLOGUE(func)
push { r8, r9, r10 }
tst n, #1
beq L(skip1)
ldr r10, [vp], #4
ldr r12, [up], #4
LOGOP( r12, r12, r10)
POSTOP( r12)
str r12, [rp], #4
L(skip1):
tst n, #2
beq L(skip2)
ldmia vp!, { r10, r12 }
ldmia up!, { r8, r9 }
LOGOP( r8, r8, r10)
LOGOP( r9, r9, r12)
POSTOP( r8)
POSTOP( r9)
stmia rp!, { r8, r9 }
L(skip2):
bics n, n, #3
beq L(rtn)
push { r4, r5, r6, r7 }
ldmia vp!, { r8, r9, r10, r12 }
b L(mid)
L(top): ldmia vp!, { r8, r9, r10, r12 }
POSTOP( r4)
POSTOP( r5)
POSTOP( r6)
POSTOP( r7)
stmia rp!, { r4, r5, r6, r7 }
L(mid): sub n, n, #4
ldmia up!, { r4, r5, r6, r7 }
teq n, #0
LOGOP( r4, r4, r8)
LOGOP( r5, r5, r9)
LOGOP( r6, r6, r10)
LOGOP( r7, r7, r12)
bne L(top)
POSTOP( r4)
POSTOP( r5)
POSTOP( r6)
POSTOP( r7)
stmia rp!, { r4, r5, r6, r7 }
pop { r4, r5, r6, r7 } C popping r8-r10 here strangely fails
L(rtn): pop { r8, r9, r10 }
return r14
EPILOGUE()
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