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Update.
2003-11-14 David Mosberger <davidm@hpl.hp.com> * sysdeps/unix/sysv/linux/ia64/sysdep.h (GAS_ALIGN_BREAKS_UNWIND_INFO): Define this macro to indicate that all existing GAS versions have a problem with .align inside a function. * sysdeps/ia64/memccpy.S: Work around GAS_ALIGN_BREAKS_UNWIND_INFO bug. * sysdeps/ia64/memcpy.S: Likewise. * sysdeps/ia64/memset.S: Likewise. * sysdeps/ia64/memmove.S: Likewise. Also move the jump-table to out of .text into .rodata, where it belongs. * sysdeps/unix/sysv/linux/ia64/pipe.S: There is no need to save/restore input-arguments, because they're necessarily preserved by the kernel to support syscall-restart.
This commit is contained in:
Ulrich Drepper
16
ChangeLog
16
ChangeLog
@@ -1,3 +1,19 @@
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2003-11-14 David Mosberger <davidm@hpl.hp.com>
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* sysdeps/unix/sysv/linux/ia64/sysdep.h
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(GAS_ALIGN_BREAKS_UNWIND_INFO): Define this macro to indicate
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that all existing GAS versions have a problem with .align inside
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a function.
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* sysdeps/ia64/memccpy.S: Work around GAS_ALIGN_BREAKS_UNWIND_INFO bug.
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* sysdeps/ia64/memcpy.S: Likewise.
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* sysdeps/ia64/memset.S: Likewise.
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* sysdeps/ia64/memmove.S: Likewise. Also move the jump-table to
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out of .text into .rodata, where it belongs.
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* sysdeps/unix/sysv/linux/ia64/pipe.S: There is no need to
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save/restore input-arguments, because they're necessarily
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preserved by the kernel to support syscall-restart.
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2003-11-18 Jakub Jelinek <jakub@redhat.com>
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* posix/regex_internal.h (re_token_type_t): Remove unused ALT,
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@@ -52,6 +52,15 @@
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#define loopcnt r30
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#define value r31
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#ifdef GAS_ALIGN_BREAKS_UNWIND_INFO
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/* Manually force proper loop-alignment. Note: be sure to
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double-check the code-layout after making any changes to
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this routine! */
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# define ALIGN(n) { nop 0 }
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#else
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# define ALIGN(n) .align n
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#endif
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ENTRY(memccpy)
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.prologue
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alloc r2 = ar.pfs, 4, 40 - 4, 0, 40
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@@ -110,7 +119,7 @@ ENTRY(memccpy)
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mov ar.ec = MEMLAT + 6 + 1 // six more passes needed
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ld8 r[1] = [asrc], 8 // r[1] = w0
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cmp.ne p6, p0 = r0, r0 ;; // clear p6
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.align 32
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ALIGN(32)
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.l2:
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(p[0]) ld8.s r[0] = [asrc], 8 // r[0] = w1
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(p[MEMLAT]) shr.u tmp1[0] = r[1 + MEMLAT], sh1 // tmp1 = w0 >> sh1
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@@ -103,14 +103,22 @@
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#define the_z z
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#endif
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#ifdef GAS_ALIGN_BREAKS_UNWIND_INFO
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/* Manually force proper loop-alignment. Note: be sure to
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double-check the code-layout after making any changes to
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this routine! */
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# define ALIGN(n) { nop 0 }
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#else
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# define ALIGN(n) .align n
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#endif
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#if defined(USE_LFETCH)
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#define LOOP(shift) \
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.align 32 ; \
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ALIGN(32); \
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.loop##shift##: \
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{ .mmb \
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(p[0]) ld8.nt1 r[0] = [asrc], 8 ; \
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(p[0]) lfetch.nt1 [ptr1], 16 ; \
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(p[0]) lfetch.nt1 [ptr1], 16 ; \
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nop.b 0 ; \
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} { .mib \
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(p[MEMLAT+1]) st8 [dest] = tmp3, 8 ; \
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@@ -118,7 +126,7 @@
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nop.b 0 ;; \
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} { .mmb \
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(p[0]) ld8.nt1 s[0] = [asrc], 8 ; \
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(p[0]) lfetch.nt1 [ptr2], 16 ; \
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(p[0]) lfetch.nt1 [ptr2], 16 ; \
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nop.b 0 ; \
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} { .mib \
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(p[MEMLAT+1]) st8 [dest] = tmp4, 8 ; \
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@@ -130,7 +138,7 @@
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}
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#else
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#define LOOP(shift) \
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.align 32 ; \
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ALIGN(32); \
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.loop##shift##: \
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{ .mmb \
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(p[0]) ld8.nt1 r[0] = [asrc], 8 ; \
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@@ -254,7 +262,11 @@ ENTRY(memcpy)
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movi0 ar.lc = loopcnt // set the loop counter
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;; }
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#ifdef GAS_ALIGN_BREAKS_UNWIND_INFO
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{ nop 0 }
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#else
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.align 32
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#endif
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#if defined(USE_FLP)
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.l1: // ------------------------------- // L1: Everything a multiple of 8
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{ .mmi
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@@ -56,12 +56,18 @@
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#define loopcnt r30
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#define value r31
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#ifdef GAS_ALIGN_BREAKS_UNWIND_INFO
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# define ALIGN(n) { nop 0 }
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#else
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# define ALIGN(n) .align n
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#endif
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#define LOOP(shift) \
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.align 32 ; \
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ALIGN(32); \
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.loop##shift##: \
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(p[0]) ld8 r[0] = [asrc], 8 ; /* w1 */ \
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(p[MEMLAT+1]) st8 [dest] = value, 8 ; \
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(p[MEMLAT]) shrp value = r[MEMLAT], r[MEMLAT+1], shift ; \
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(p[MEMLAT]) shrp value = r[MEMLAT], r[MEMLAT+1], shift ; \
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nop.b 0 ; \
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nop.b 0 ; \
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br.ctop.sptk .loop##shift ; \
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@@ -228,6 +234,10 @@ ENTRY(memmove)
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(p[MEMLAT]) st1 [dest] = r[MEMLAT], -1
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br.ctop.dptk .l6
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br.cond.sptk .restore_and_exit
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END(memmove)
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.rodata
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.align 8
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.table:
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data8 0 // dummy entry
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data8 .loop56 - .loop8
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@@ -238,5 +248,4 @@ ENTRY(memmove)
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data8 .loop56 - .loop48
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data8 .loop56 - .loop56
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END(memmove)
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libc_hidden_builtin_def (memmove)
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@@ -153,7 +153,9 @@ ENTRY(memset)
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(p_zr) br.cond.dptk.many .l1b // Jump to use stf.spill
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;; }
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#ifndef GAS_ALIGN_BREAKS_UNWIND_INFO
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.align 32 // -------- // L1A: store ahead into cache lines; fill later
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#endif
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{ .mmi
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and tmp = -(LINE_SIZE), cnt // compute end of range
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mov ptr9 = ptr1 // used for prefetching
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@@ -222,7 +224,11 @@ ENTRY(memset)
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br.cond.dpnt.many .move_bytes_from_alignment // Branch no. 3
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;; }
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#ifdef GAS_ALIGN_BREAKS_UNWIND_INFO
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{ nop 0 }
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#else
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.align 32
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#endif
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.l1b: // ------------------ // L1B: store ahead into cache lines; fill later
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{ .mmi
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and tmp = -(LINE_SIZE), cnt // compute end of range
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@@ -283,13 +289,15 @@ ENTRY(memset)
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{ .mib
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cmp.eq p_scr, p0 = loopcnt, r0
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add loopcnt = -1, loopcnt
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(p_scr) br.cond.dpnt.many .store_words
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(p_scr) br.cond.dpnt.many store_words
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;; }
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{ .mib
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and cnt = 0x1f, cnt // compute the remaining cnt
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movi0 ar.lc = loopcnt
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;; }
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#ifndef GAS_ALIGN_BREAKS_UNWIND_INFO
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.align 32
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#endif
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.l2: // ---------------------------- // L2A: store 32B in 2 cycles
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{ .mmb
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store [ptr1] = myval, 8
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@@ -299,7 +307,7 @@ ENTRY(memset)
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store [ptr2] = myval, 24
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br.cloop.dptk.many .l2
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;; }
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.store_words:
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store_words:
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{ .mib
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cmp.gt p_scr, p0 = 8, cnt // just a few bytes left ?
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(p_scr) br.cond.dpnt.many .move_bytes_from_alignment // Branch
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@@ -22,15 +22,14 @@
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#include <sysdep.h>
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ENTRY(__pipe)
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st8 [sp]=r32 // save ptr across system call
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.regstk 1,0,0,0
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DO_CALL (SYS_ify (pipe))
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ld8 r2=[sp]
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cmp.ne p6,p0=-1,r10
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;;
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(p6) st4 [r2]=r8,4
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(p6) st4 [in0]=r8,4
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(p6) mov ret0=0
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;;
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(p6) st4 [r2]=r9
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(p6) st4 [in0]=r9
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(p6) ret
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br.cond.spnt.few __syscall_error
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PSEUDO_END(__pipe)
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@@ -24,6 +24,13 @@
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#include <sysdeps/unix/sysdep.h>
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#include <sysdeps/ia64/sysdep.h>
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/* As of GAS v2.4.90.0.7, including a ".align" directive inside a
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function will cause bad unwind info to be emitted (GAS doesn't know
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how to account for the padding introduced by the .align directive).
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Turning on this macro will work around this bug by introducing the
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necessary padding explicitly. */
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#define GAS_ALIGN_BREAKS_UNWIND_INFO
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/* For Linux we can use the system call table in the header file
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/usr/include/asm/unistd.h
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of the kernel. But these symbols do not follow the SYS_* syntax
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