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// string.s: function to concatenate 2 strings// Copyright (c) 2000, Intel Corporation// All rights reserved.// // WARRANTY DISCLAIMER// // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // Intel Corporation is the author of this code, and requests that all// problem reports or change requests be submitted to it directly at // http://developer.intel.com/opensource.//
.file "string.s" .section .text// -- Begin strcat .proc strcat#
.global strcat#
.align 32
strcat: { .mib alloc r14=ar.pfs,2,6,0,8 //8 rotating registers, 7 locals mov r11=pr //Save predicate register file brp.loop.imp .bs1len, .bws1 // Put loop backedge target in TAR } // Setup for doing software pipelined loops { .mib mov r9=r33 mov pr.rot=0x30000 // p16=p17=1 nop.b 0 };;
{ .mib mov r14=r32 mov ar.ec=0 nop.b 0 } { .mib // Extra bundle to align bs1len. mov r8=r32 nop.i 0 brp.loop.imp .bcat, .bwcat ;; // Put loop backedge target in TAR
}.bs1len: { .mii ld1.s r37=[r14],1 // *s (r37,r38,r39) nop.i 0 (p19) chk.s r39,.natfault1_0 // } .bws1: { .mfb (p19) cmp4.ne p17,p0=r39,r0 // *s==0 (p16,p17,p18) nop.f 0 (p17) br.wtop.dptk .bs1len ;; //
}//// Now concatenate s2 into the end of s1// { .mib add r14=-3,r14 // Since ld1.s is 2 stages ahead dep r15=1,r0,32,32 // rb = 0xffffffff00000000 clrrrb ;;
} { .mii // Setup for doing software pipelined loops or r32=r14,r9 mov pr.rot=0x30000 ;; // p16=p17=1
and r32=3,r32 ;;
} { .mib cmp4.ne p10,p0=r32,r0 mov ar.ec=0 (p10) br.spnt .b_notaligned ;;
}.bcat: { .mii ld4.s r32=[r9],4 // *s1 (r32,r33,r34) (p18) chk.s r33,.natfault2_0 // (p18) pcmp1.eq r16=r33,r15 ;; // r16 !=0 only if a zero byte is found
} .bwcat: { .mib (p19) st4 [r14]=r34,4 // *s2=*s1 (p18) cmp4.eq p17,p0=r16,r0 // zero byte found? (p17) br.wtop.dptk .bcat ;; //
} { .mfi nop.m 0 nop.f 0 czx1.r r16 = r33 } ;;
{ .mfi cmp.leu p2, p0 = 2, r16 nop.f 0 shr.u r35 = r33, 8 } { .mfi cmp.eq p4, p0 = 3, r16 nop.f 0 cmp.ne p5, p0 = r0, r16 } ;;
{ .mfi (p5)st1 [r14] = r33, 1 nop.f 0 shr.u r36 = r33, 16 };;
{ .mfi (p2)st1 [r14] = r35,1 nop.f 0 nop.i 0 } ;;
{ .mfi (p4)st1 [r14] = r36,1 nop.f 0 nop.i 0 };;
{ .mib (p0) st1 [r14] = r0 nop.i 0 clrrrb } ;;
{ .mib nop.m 0 mov pr=r11,0x1003e br.ret.sptk.many b0 ;;
}.b_notaligned: { .mmi ld1 r32=[r9],1 ;; // 2 cycle load causes 1 cycle stall
st1 [r14]=r32,1 // 3 cycles between st1 to avoid flush cmp4.ne.unc p7,p0=r32,r0 ;; // Extra stop bit to force 3 cycles
} { .mib nop.m 0 nop.i 0 (p7) br.cond.dptk .b_notaligned ;;
} { .mib nop.m 0 mov pr=r11,0x1003e br.ret.sptk.many b0 ;;
}.natfault1_0:{ .mmi add r39=-3,r14 ;;
ld1 r39=[r39] // Redo the load nop.i 0 } { .mib nop.m 0 nop.i 0 br.sptk .bws1 ;;
}.natfault2_0:{ .mmi add r33=-8,r9 ;;
ld4 r33=[r33] // *s1 (r32,r33,r34) nop.i 0;;
} { .mib nop.m 0 (p18) pcmp1.eq r16=r33,r15 // r16 !=0 only if a zero byte is found br.sptk .bwcat ;;
}_2_1_2auto_size == 0x0// -- End strcat .endp strcat#
// mark_proc_addr_taken strcat;
// End
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