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-rw-r--r--sysdeps/ia64/memcmp.S165
1 files changed, 0 insertions, 165 deletions
diff --git a/sysdeps/ia64/memcmp.S b/sysdeps/ia64/memcmp.S
deleted file mode 100644
index 144df403b4..0000000000
--- a/sysdeps/ia64/memcmp.S
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-/* Optimized version of the standard memcmp() function.
- This file is part of the GNU C Library.
- Copyright (C) 2000-2024 Free Software Foundation, Inc.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <https://www.gnu.org/licenses/>. */
-
-/* Return: the result of the comparison
-
- Inputs:
- in0: dest (aka s1)
- in1: src (aka s2)
- in2: byte count
-
- In this form, it assumes little endian mode. For big endian mode,
- the two shifts in .l2 must be inverted:
-
- shl tmp1[0] = r[1 + MEMLAT], sh1 // tmp1 = w0 << sh1
- shr.u tmp2[0] = r[0 + MEMLAT], sh2 // tmp2 = w1 >> sh2
-
- and all the mux1 instructions should be replaced by plain mov's. */
-
-#include <sysdep.h>
-#undef ret
-
-#define OP_T_THRES 16
-#define OPSIZ 8
-#define MEMLAT 2
-
-#define start r15
-#define saved_pr r17
-#define saved_lc r18
-#define dest r19
-#define src r20
-#define len r21
-#define asrc r22
-#define tmp r23
-#define value1 r24
-#define value2 r25
-#define sh2 r28
-#define sh1 r29
-#define loopcnt r30
-
-ENTRY(memcmp)
- .prologue
- alloc r2 = ar.pfs, 3, 37, 0, 40
-
- .rotr r[MEMLAT + 2], q[MEMLAT + 5], tmp1[4], tmp2[4], val[2]
- .rotp p[MEMLAT + 4 + 1]
-
- mov ret0 = r0 // by default return value = 0
- .save pr, saved_pr
- mov saved_pr = pr // save the predicate registers
- .save ar.lc, saved_lc
- mov saved_lc = ar.lc // save the loop counter
- .body
- mov dest = in0 // dest
- mov src = in1 // src
- mov len = in2 // len
- sub tmp = r0, in0 // tmp = -dest
- ;;
- and loopcnt = 7, tmp // loopcnt = -dest % 8
- cmp.ge p6, p0 = OP_T_THRES, len // is len <= OP_T_THRES
-(p6) br.cond.spnt .cmpfew // compare byte by byte
- ;;
- cmp.eq p6, p0 = loopcnt, r0
-(p6) br.cond.sptk .dest_aligned
- sub len = len, loopcnt // len -= -dest % 8
- adds loopcnt = -1, loopcnt // --loopcnt
- ;;
- mov ar.lc = loopcnt
-.l1: // copy -dest % 8 bytes
- ld1 value1 = [src], 1 // value = *src++
- ld1 value2 = [dest], 1
- ;;
- cmp.ne p6, p0 = value1, value2
-(p6) br.cond.spnt .done
- br.cloop.dptk .l1
-.dest_aligned:
- and sh1 = 7, src // sh1 = src % 8
- and tmp = -8, len // tmp = len & -OPSIZ
- and asrc = -8, src // asrc = src & -OPSIZ -- align src
- shr.u loopcnt = len, 3 // loopcnt = len / 8
- and len = 7, len ;; // len = len % 8
- shl sh1 = sh1, 3 // sh1 = 8 * (src % 8)
- adds loopcnt = -1, loopcnt // --loopcnt
- mov pr.rot = 1 << 16 ;; // set rotating predicates
- sub sh2 = 64, sh1 // sh2 = 64 - sh1
- mov ar.lc = loopcnt // set LC
- cmp.eq p6, p0 = sh1, r0 // is the src aligned?
-(p6) br.cond.sptk .src_aligned
- add src = src, tmp // src += len & -OPSIZ
- mov ar.ec = MEMLAT + 4 + 1 // four more passes needed
- ld8 r[1] = [asrc], 8 ;; // r[1] = w0
- .align 32
-
-// We enter this loop with p6 cleared by the above comparison
-
-.l2:
-(p[0]) ld8 r[0] = [asrc], 8 // r[0] = w1
-(p[0]) ld8 q[0] = [dest], 8
-(p[MEMLAT]) shr.u tmp1[0] = r[1 + MEMLAT], sh1 // tmp1 = w0 >> sh1
-(p[MEMLAT]) shl tmp2[0] = r[0 + MEMLAT], sh2 // tmp2 = w1 << sh2
-(p[MEMLAT+4]) cmp.ne p6, p0 = q[MEMLAT + 4], val[1]
-(p[MEMLAT+3]) or val[0] = tmp1[3], tmp2[3] // val = tmp1 | tmp2
-(p6) br.cond.spnt .l2exit
- br.ctop.sptk .l2
- br.cond.sptk .cmpfew
-.l3exit:
- mux1 value1 = r[MEMLAT], @rev
- mux1 value2 = q[MEMLAT], @rev
- cmp.ne p6, p0 = r0, r0 ;; // clear p6
-.l2exit:
-(p6) mux1 value1 = val[1], @rev
-(p6) mux1 value2 = q[MEMLAT + 4], @rev ;;
- cmp.ltu p6, p7 = value2, value1 ;;
-(p6) mov ret0 = -1
-(p7) mov ret0 = 1
- mov pr = saved_pr, -1 // restore the predicate registers
- mov ar.lc = saved_lc // restore the loop counter
- br.ret.sptk.many b0
-.src_aligned:
- cmp.ne p6, p0 = r0, r0 // clear p6
- mov ar.ec = MEMLAT + 1 ;; // set EC
-.l3:
-(p[0]) ld8 r[0] = [src], 8
-(p[0]) ld8 q[0] = [dest], 8
-(p[MEMLAT]) cmp.ne p6, p0 = r[MEMLAT], q[MEMLAT]
-(p6) br.cond.spnt .l3exit
- br.ctop.dptk .l3 ;;
-.cmpfew:
- cmp.eq p6, p0 = len, r0 // is len == 0 ?
- adds len = -1, len // --len;
-(p6) br.cond.spnt .restore_and_exit ;;
- mov ar.lc = len
-.l4:
- ld1 value1 = [src], 1
- ld1 value2 = [dest], 1
- ;;
- cmp.ne p6, p0 = value1, value2
-(p6) br.cond.spnt .done
- br.cloop.dptk .l4 ;;
-.done:
-(p6) sub ret0 = value2, value1 // don't execute it if falling thru
-.restore_and_exit:
- mov pr = saved_pr, -1 // restore the predicate registers
- mov ar.lc = saved_lc // restore the loop counter
- br.ret.sptk.many b0
-END(memcmp)
-
-weak_alias (memcmp, bcmp)
-strong_alias (memcmp, __memcmpeq)
-libc_hidden_builtin_def (memcmp)
-libc_hidden_def (__memcmpeq)