dnl IA-64 mpn_lshift/mpn_rshift. dnl Copyright 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, dnl Inc. dnl This file is part of the GNU MP Library. dnl The GNU MP Library is free software; you can redistribute it and/or modify dnl it under the terms of the GNU Lesser General Public License as published dnl by the Free Software Foundation; either version 3 of the License, or (at dnl your option) any later version. 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 Lesser General Public dnl License for more details. dnl You should have received a copy of the GNU Lesser General Public License dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. include(`../config.m4') C cycles/limb C Itanium: 2.0 C Itanium 2: 1.0 C This code is scheduled deeply since the plain shift instructions shr and shl C have a latency of 4 (on Itanium) or 3 (on Itanium 2). Poor scheduling of C these instructions cause a 10 cycle replay trap on Itanium. C TODO C * Optimize function entry and feed-in code. C INPUT PARAMETERS define(`rp',`r32') define(`up',`r33') define(`n',`r34') define(`cnt',`r35') define(`tnc',`r9') define(OPERATION_rshift,1) ifdef(`OPERATION_lshift',` define(`FSH',`shl') define(`BSH',`shr.u') define(`UPD',`-8') define(`POFF',`-512') define(`PUPD',`-32') define(`func',`mpn_lshift') ') ifdef(`OPERATION_rshift',` define(`FSH',`shr.u') define(`BSH',`shl') define(`UPD',`8') define(`POFF',`512') define(`PUPD',`32') define(`func',`mpn_rshift') ') ASM_START() PROLOGUE(func) .prologue .save ar.lc, r2 .body ifdef(`HAVE_ABI_32', ` addp4 rp = 0, rp C M I addp4 up = 0, up C M I sxt4 n = n C M I zxt4 cnt = cnt C I ;; ') {.mmi; cmp.lt p14, p15 = 4, n C M I and r14 = 3, n C M I mov.i r2 = ar.lc C I0 }{.mmi; add r15 = -1, n C M I sub tnc = 64, cnt C M I add r16 = -5, n ;; }{.mmi; cmp.eq p6, p0 = 1, r14 C M I cmp.eq p7, p0 = 2, r14 C M I shr.u n = r16, 2 C I0 }{.mmi; cmp.eq p8, p0 = 3, r14 C M I ifdef(`OPERATION_lshift', ` shladd up = r15, 3, up C M I shladd rp = r15, 3, rp') C M I ;; }{.mmi; add r11 = POFF, up C M I ld8 r10 = [up], UPD C M01 mov.i ar.lc = n C I0 }{.bbb; (p6) br.dptk .Lb01 (p7) br.dptk .Lb10 (p8) br.dptk .Lb11 ;; } .Lb00: ld8 r19 = [up], UPD ;; ld8 r16 = [up], UPD ;; ld8 r17 = [up], UPD BSH r8 = r10, tnc C function return value (p14) br.cond.dptk .grt4 FSH r24 = r10, cnt BSH r25 = r19, tnc ;; FSH r26 = r19, cnt BSH r27 = r16, tnc ;; FSH r20 = r16, cnt BSH r21 = r17, tnc ;; or r14 = r25, r24 FSH r22 = r17, cnt BSH r23 = r10, tnc br .Lr4 .grt4: FSH r24 = r10, cnt BSH r25 = r19, tnc ;; ld8 r18 = [up], UPD FSH r26 = r19, cnt BSH r27 = r16, tnc ;; ld8 r19 = [up], UPD FSH r20 = r16, cnt BSH r21 = r17, tnc ;; ld8 r16 = [up], UPD FSH r22 = r17, cnt BSH r23 = r18, tnc ;; or r14 = r25, r24 ld8 r17 = [up], UPD br.cloop.dpnt .Ltop br .Lbot .Lb01: (p15) BSH r8 = r10, tnc C function return value I (p15) FSH r22 = r10, cnt C I (p15) br.cond.dptk .Lr1 C return B .grt1: ld8 r18 = [up], UPD ;; ld8 r19 = [up], UPD BSH r8 = r10, tnc C function return value ;; ld8 r16 = [up], UPD FSH r22 = r10, cnt BSH r23 = r18, tnc ;; ld8 r17 = [up], UPD br.cloop.dpnt .grt5 ;; FSH r24 = r18, cnt BSH r25 = r19, tnc ;; or r15 = r23, r22 FSH r26 = r19, cnt BSH r27 = r16, tnc ;; FSH r20 = r16, cnt BSH r21 = r17, tnc br .Lr5 .grt5: FSH r24 = r18, cnt BSH r25 = r19, tnc ;; ld8 r18 = [up], UPD FSH r26 = r19, cnt BSH r27 = r16, tnc ;; ld8 r19 = [up], UPD FSH r20 = r16, cnt BSH r21 = r17, tnc ;; or r15 = r23, r22 ld8 r16 = [up], UPD br .LL01 .Lb10: ld8 r17 = [up], UPD (p14) br.cond.dptk .grt2 BSH r8 = r10, tnc C function return value ;; FSH r20 = r10, cnt BSH r21 = r17, tnc ;; or r14 = r21, r20 FSH r22 = r17, cnt br .Lr2 C return .grt2: ld8 r18 = [up], UPD BSH r8 = r10, tnc C function return value ;; ld8 r19 = [up], UPD FSH r20 = r10, cnt BSH r21 = r17, tnc ;; ld8 r16 = [up], UPD FSH r22 = r17, cnt BSH r23 = r18, tnc ;; ld8 r17 = [up], UPD br.cloop.dpnt .grt6 ;; or r14 = r21, r20 FSH r24 = r18, cnt BSH r25 = r19, tnc ;; FSH r26 = r19, cnt BSH r27 = r16, tnc br .Lr6 .grt6: or r14 = r21, r20 FSH r24 = r18, cnt BSH r25 = r19, tnc ;; ld8 r18 = [up], UPD FSH r26 = r19, cnt BSH r27 = r16, tnc ;; ld8 r19 = [up], UPD br .LL10 .Lb11: ld8 r16 = [up], UPD ;; ld8 r17 = [up], UPD BSH r8 = r10, tnc C function return value (p14) br.cond.dptk .grt3 ;; FSH r26 = r10, cnt BSH r27 = r16, tnc ;; FSH r20 = r16, cnt BSH r21 = r17, tnc ;; or r15 = r27, r26 FSH r22 = r17, cnt br .Lr3 C return .grt3: ld8 r18 = [up], UPD FSH r26 = r10, cnt BSH r27 = r16, tnc ;; ld8 r19 = [up], UPD FSH r20 = r16, cnt BSH r21 = r17, tnc ;; ld8 r16 = [up], UPD FSH r22 = r17, cnt BSH r23 = r18, tnc ;; ld8 r17 = [up], UPD br.cloop.dpnt .grt7 or r15 = r27, r26 FSH r24 = r18, cnt BSH r25 = r19, tnc br .Lr7 .grt7: or r15 = r27, r26 FSH r24 = r18, cnt BSH r25 = r19, tnc ld8 r18 = [up], UPD br .LL11 C *** MAIN LOOP START *** ALIGN(32) .Ltop: {.mmi; st8 [rp] = r14, UPD C M2 or r15 = r27, r26 C M3 FSH r24 = r18, cnt C I0 }{.mmi; ld8 r18 = [up], UPD C M1 lfetch [r11], PUPD BSH r25 = r19, tnc C I1 ;; } .LL11: {.mmi; st8 [rp] = r15, UPD or r14 = r21, r20 FSH r26 = r19, cnt }{.mmi; ld8 r19 = [up], UPD nop.m 0 BSH r27 = r16, tnc ;; } .LL10: {.mmi; st8 [rp] = r14, UPD or r15 = r23, r22 FSH r20 = r16, cnt }{.mmi; ld8 r16 = [up], UPD nop.m 0 BSH r21 = r17, tnc ;; } .LL01: {.mmi; st8 [rp] = r15, UPD or r14 = r25, r24 FSH r22 = r17, cnt }{.mib; ld8 r17 = [up], UPD BSH r23 = r18, tnc br.cloop.dptk .Ltop ;; } C *** MAIN LOOP END *** .Lbot: or r15 = r27, r26 FSH r24 = r18, cnt BSH r25 = r19, tnc st8 [rp] = r14, UPD ;; .Lr7: or r14 = r21, r20 FSH r26 = r19, cnt BSH r27 = r16, tnc st8 [rp] = r15, UPD ;; .Lr6: or r15 = r23, r22 FSH r20 = r16, cnt BSH r21 = r17, tnc st8 [rp] = r14, UPD ;; .Lr5: st8 [rp] = r15, UPD or r14 = r25, r24 FSH r22 = r17, cnt ;; .Lr4: or r15 = r27, r26 st8 [rp] = r14, UPD ;; .Lr3: or r14 = r21, r20 st8 [rp] = r15, UPD ;; .Lr2: st8 [rp] = r14, UPD ;; .Lr1: st8 [rp] = r22, UPD C M23 mov ar.lc = r2 C I0 br.ret.sptk.many b0 C B EPILOGUE(func) ASM_END()