1 dnl SPARC v9 mpn_cnd_add_n and mpn_cnd_sub_n for T3/T4/T5. 2 3 dnl Contributed to the GNU project by David Miller and Torbjrn Granlund. 4 5 dnl Copyright 2013, 2017 Free Software Foundation, Inc. 6 7 dnl This file is part of the GNU MP Library. 8 dnl 9 dnl The GNU MP Library is free software; you can redistribute it and/or modify 10 dnl it under the terms of either: 11 dnl 12 dnl * the GNU Lesser General Public License as published by the Free 13 dnl Software Foundation; either version 3 of the License, or (at your 14 dnl option) any later version. 15 dnl 16 dnl or 17 dnl 18 dnl * the GNU General Public License as published by the Free Software 19 dnl Foundation; either version 2 of the License, or (at your option) any 20 dnl later version. 21 dnl 22 dnl or both in parallel, as here. 23 dnl 24 dnl The GNU MP Library is distributed in the hope that it will be useful, but 25 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 26 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 27 dnl for more details. 28 dnl 29 dnl You should have received copies of the GNU General Public License and the 30 dnl GNU Lesser General Public License along with the GNU MP Library. If not, 31 dnl see https://www.gnu.org/licenses/. 32 33 include(`../config.m4') 34 35 C cycles/limb 36 C UltraSPARC T3: 8.5 37 C UltraSPARC T4: 3 38 39 C We use a double-pointer trick to allow indexed addressing. Its setup 40 C cost might be a problem in these functions, since we don't expect huge n 41 C arguments. 42 C 43 C For sub we need ~(a & mask) = (~a | ~mask) but by complementing mask we can 44 C instead do ~(a & ~mask) = (~a | mask), allowing us to use the orn insn. 45 46 C INPUT PARAMETERS 47 define(`cnd', `%i0') 48 define(`rp', `%i1') 49 define(`up', `%i2') 50 define(`vp', `%i3') 51 define(`n', `%i4') 52 53 define(`mask', `cnd') 54 define(`up0', `%l0') define(`up1', `%l1') 55 define(`vp0', `%l2') define(`vp1', `%l3') 56 define(`rp0', `%g4') define(`rp1', `%g5') 57 define(`u0', `%l4') define(`u1', `%l5') 58 define(`v0', `%l6') define(`v1', `%l7') 59 define(`x0', `%g1') define(`x1', `%g3') 60 define(`w0', `%g1') define(`w1', `%g3') 61 62 ifdef(`OPERATION_cnd_add_n',` 63 define(`LOGOP', `and $1, $2, $3') 64 define(`MAKEMASK',`cmp %g0, $1 65 addxc( %g0, %g0, $2) 66 neg $2, $2') 67 define(`INITCY', `addcc %g0, 0, %g0') 68 define(`RETVAL', `addxc( %g0, %g0, %i0)') 69 define(`func', `mpn_cnd_add_n') 70 ') 71 ifdef(`OPERATION_cnd_sub_n',` 72 define(`LOGOP', `orn $2, $1, $3') 73 define(`MAKEMASK',`cmp $1, 1 74 addxc( %g0, %g0, $2) 75 neg $2, $2') 76 define(`INITCY', `subcc %g0, 1, %g0') 77 define(`RETVAL', `addxc( %g0, %g0, %i0) 78 xor %i0, 1, %i0') 79 define(`func', `mpn_cnd_sub_n') 80 ') 81 82 MULFUNC_PROLOGUE(mpn_cnd_add_n mpn_cnd_sub_n) 83 84 ASM_START() 85 REGISTER(%g2,#scratch) 86 REGISTER(%g3,#scratch) 87 PROLOGUE(func) 88 save %sp, -176, %sp 89 90 MAKEMASK(cnd,mask) 91 92 andcc n, 1, %g0 93 sllx n, 3, n 94 add n, -16, n 95 add vp, n, vp0 96 add up, n, up0 97 add rp, n, rp0 98 neg n, n 99 be L(evn) 100 INITCY 101 102 L(odd): ldx [vp0 + n], v1 103 ldx [up0 + n], u1 104 LOGOP( v1, mask, x1) 105 addxccc(u1, x1, w1) 106 stx w1, [rp0 + n] 107 add n, 8, n 108 brgz n, L(rtn) 109 nop 110 111 L(evn): add vp0, 8, vp1 112 add up0, 8, up1 113 add rp0, -24, rp1 114 ldx [vp0 + n], v0 115 ldx [vp1 + n], v1 116 ldx [up0 + n], u0 117 ldx [up1 + n], u1 118 add n, 16, n 119 brgz n, L(end) 120 add rp0, -16, rp0 121 122 L(top): LOGOP( v0, mask, x0) 123 ldx [vp0 + n], v0 124 LOGOP( v1, mask, x1) 125 ldx [vp1 + n], v1 126 addxccc(u0, x0, w0) 127 ldx [up0 + n], u0 128 addxccc(u1, x1, w1) 129 ldx [up1 + n], u1 130 stx w0, [rp0 + n] 131 add n, 16, n 132 brlez n, L(top) 133 stx w1, [rp1 + n] 134 135 L(end): LOGOP( v0, mask, x0) 136 LOGOP( v1, mask, x1) 137 addxccc(u0, x0, w0) 138 addxccc(u1, x1, w1) 139 stx w0, [rp0 + n] 140 stx w1, [rp1 + 32] 141 142 L(rtn): RETVAL 143 ret 144 restore 145 EPILOGUE() 146
Indexes created Sat Feb 28 05:31:39 UTC 2026