From 8507e831907ff46d06382fe453c6832db2594e0b Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Tue, 18 Dec 2018 13:57:23 +0100 Subject: S390: Refactor wcsspn ifunc handling. The ifunc handling for wcsspn is adjusted in order to omit ifunc if the minimum architecture level already supports newer CPUs by default. Unfortunately the c ifunc variant can't be omitted at all as it is used by the z13 ifunc variant as fallback if the pointers are not 4-byte aligned. Glibc internal calls will use the "newer" ifunc variant. ChangeLog: * sysdeps/s390/multiarch/Makefile (sysdep_routines): Remove wcsspn variants. * sysdeps/s390/Makefile (sysdep_routines): Add wcsspn variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for wcsspn. * sysdeps/s390/multiarch/wcsspn-c.c: Move to ... * sysdeps/s390/wcsspn-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcsspn-vx.S: Move to ... * sysdeps/s390/wcsspn-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcsspn.c: Move to ... * sysdeps/s390/wcsspn.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-wcsspn.h: New file. --- sysdeps/s390/Makefile | 3 +- sysdeps/s390/ifunc-wcsspn.h | 53 ++++++ sysdeps/s390/multiarch/Makefile | 3 +- sysdeps/s390/multiarch/ifunc-impl-list.c | 15 +- sysdeps/s390/multiarch/wcsspn-c.c | 31 ---- sysdeps/s390/multiarch/wcsspn-vx.S | 270 ----------------------------- sysdeps/s390/multiarch/wcsspn.c | 29 ---- sysdeps/s390/wcsspn-c.c | 37 ++++ sysdeps/s390/wcsspn-vx.S | 280 +++++++++++++++++++++++++++++++ sysdeps/s390/wcsspn.c | 39 +++++ 10 files changed, 425 insertions(+), 335 deletions(-) create mode 100644 sysdeps/s390/ifunc-wcsspn.h delete mode 100644 sysdeps/s390/multiarch/wcsspn-c.c delete mode 100644 sysdeps/s390/multiarch/wcsspn-vx.S delete mode 100644 sysdeps/s390/multiarch/wcsspn.c create mode 100644 sysdeps/s390/wcsspn-c.c create mode 100644 sysdeps/s390/wcsspn-vx.S create mode 100644 sysdeps/s390/wcsspn.c (limited to 'sysdeps/s390') diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile index a2c641e..2e48900 100644 --- a/sysdeps/s390/Makefile +++ b/sysdeps/s390/Makefile @@ -95,5 +95,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \ wcsncmp wcsncmp-vx wcsncmp-c \ wcschr wcschr-vx wcschr-c \ wcschrnul wcschrnul-vx wcschrnul-c \ - wcsrchr wcsrchr-vx wcsrchr-c + wcsrchr wcsrchr-vx wcsrchr-c \ + wcsspn wcsspn-vx wcsspn-c endif diff --git a/sysdeps/s390/ifunc-wcsspn.h b/sysdeps/s390/ifunc-wcsspn.h new file mode 100644 index 0000000..1189c6b --- /dev/null +++ b/sysdeps/s390/ifunc-wcsspn.h @@ -0,0 +1,53 @@ +/* wcsspn variant information on S/390 version. + Copyright (C) 2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#if defined USE_MULTIARCH && IS_IN (libc) \ + && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT +# define HAVE_WCSSPN_IFUNC 1 +#else +# define HAVE_WCSSPN_IFUNC 0 +#endif + +#ifdef HAVE_S390_VX_ASM_SUPPORT +# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT HAVE_WCSSPN_IFUNC +#else +# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT 0 +#endif + +#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT +# define WCSSPN_DEFAULT WCSSPN_Z13 +/* The z13 ifunc variant is using the common code variant as fallback! */ +# define HAVE_WCSSPN_C 1 +# define HAVE_WCSSPN_Z13 1 +#else +# define WCSSPN_DEFAULT WCSSPN_C +# define HAVE_WCSSPN_C 1 +# define HAVE_WCSSPN_Z13 HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT +#endif + +#if HAVE_WCSSPN_C +# define WCSSPN_C __wcsspn_c +#else +# define WCSSPN_C NULL +#endif + +#if HAVE_WCSSPN_Z13 +# define WCSSPN_Z13 __wcsspn_vx +#else +# define WCSSPN_Z13 NULL +#endif diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile index 3d72cbb..091f515 100644 --- a/sysdeps/s390/multiarch/Makefile +++ b/sysdeps/s390/multiarch/Makefile @@ -1,6 +1,5 @@ ifeq ($(subdir),wcsmbs) -sysdep_routines += wcsspn wcsspn-vx wcsspn-c \ - wcspbrk wcspbrk-vx wcspbrk-c \ +sysdep_routines += wcspbrk wcspbrk-vx wcspbrk-c \ wcscspn wcscspn-vx wcscspn-c \ wmemchr wmemchr-vx wmemchr-c \ wmemset wmemset-vx wmemset-c \ diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c index ffb4d5b..6f4de28 100644 --- a/sysdeps/s390/multiarch/ifunc-impl-list.c +++ b/sysdeps/s390/multiarch/ifunc-impl-list.c @@ -59,6 +59,7 @@ #include #include #include +#include /* Maximum number of IFUNC implementations. */ #define MAX_IFUNC 3 @@ -593,6 +594,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, ) #endif /* HAVE_WCSRCHR_IFUNC */ +#if HAVE_WCSSPN_IFUNC + IFUNC_IMPL (i, name, wcsspn, +# if HAVE_WCSSPN_Z13 + IFUNC_IMPL_ADD (array, i, wcsspn, + dl_hwcap & HWCAP_S390_VX, WCSSPN_Z13) +# endif +# if HAVE_WCSSPN_C + IFUNC_IMPL_ADD (array, i, wcsspn, 1, WCSSPN_C) +# endif + ) +#endif /* HAVE_WCSSPN_IFUNC */ + #ifdef HAVE_S390_VX_ASM_SUPPORT # define IFUNC_VX_IMPL(FUNC) \ @@ -601,8 +614,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, __##FUNC##_vx) \ IFUNC_IMPL_ADD (array, i, FUNC, 1, __##FUNC##_c)) - IFUNC_VX_IMPL (wcsspn); - IFUNC_VX_IMPL (wcspbrk); IFUNC_VX_IMPL (wcscspn); diff --git a/sysdeps/s390/multiarch/wcsspn-c.c b/sysdeps/s390/multiarch/wcsspn-c.c deleted file mode 100644 index 2c0bd0f..0000000 --- a/sysdeps/s390/multiarch/wcsspn-c.c +++ /dev/null @@ -1,31 +0,0 @@ -/* Default wcsspn implementation for S/390. - Copyright (C) 2015-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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 - . */ - -#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) -# define WCSSPN __wcsspn_c - -# include -extern __typeof (wcsspn) __wcsspn_c; -# ifdef SHARED -# undef libc_hidden_def -# define libc_hidden_def(name) \ - __hidden_ver1 (__wcsspn_c, __GI_wcsspn, __wcsspn_c); -# endif /* SHARED */ - -# include -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ diff --git a/sysdeps/s390/multiarch/wcsspn-vx.S b/sysdeps/s390/multiarch/wcsspn-vx.S deleted file mode 100644 index 548f2ad..0000000 --- a/sysdeps/s390/multiarch/wcsspn-vx.S +++ /dev/null @@ -1,270 +0,0 @@ -/* Vector optimized 32/64 bit S/390 version of wcsspn. - Copyright (C) 2015-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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 - . */ - -#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) - -# include "sysdep.h" -# include "asm-syntax.h" - - .text - -/* size_t wcsspn (const wchar_t *s, const wchar_t * accept) - The wcsspn() function calculates the length of the initial segment - of s which consists entirely of characters in accept. - - This method checks the length of accept string. If it fits entirely - in one vector register, a fast algorithm is used, which does not need - to check multiple parts of accept-string. Otherwise a slower full - check of accept-string is used. - - register overview: - r3: pointer to start of accept-string - r2: pointer to start of search-string - r4: loaded byte count of vl search-string - r0: found byte index - r1: current return len of s - v16: search-string - v17: accept-string - v18: temp-vreg - - ONLY FOR SLOW: - v19: first accept-string - v20: zero for preparing acc-vector - v21: global mask; 1 indicates a match between - search-string-vreg and any accept-character - v22: current mask; 1 indicates a match between - search-string-vreg and any accept-character in current acc-vreg - v30, v31: for re-/storing registers r6, r8, r9 - r5: current len of accept-string - r6: zero-index in search-string or 16 if no zero - or min(zero-index, loaded byte count) - r8: >0, if former accept-string-part contains a zero, - otherwise =0; - r9: loaded byte count of vlbb accept-string -*/ -ENTRY(__wcsspn_vx) - .machine "z13" - .machinemode "zarch_nohighgprs" - - tmll %r2,3 /* Test if s is 4-byte aligned? */ - jne .Lfallback /* And use common-code variant if not. */ - - /* - Check if accept-string fits in one vreg: - ---------------------------------------- - */ - vlbb %v17,0(%r3),6 /* Load accept. */ - lcbb %r4,0(%r3),6 - jo .Lcheck_onbb /* Special case if accept lays - on block-boundary. */ -.Lcheck_notonbb: - vistrfs %v17,%v17 /* Fill with zeros after first zero. */ - je .Lfast /* Zero found -> accept fits in one vreg. */ - j .Lslow /* No zero -> accept exceeds one vreg. */ - -.Lcheck_onbb: - /* Accept lays on block-boundary. */ - nill %r4,65532 /* Recognize only fully loaded characters. */ - je .Lcheck_onbb2 /* Reload vr if no full wchar_t. */ - vfenezf %v18,%v17,%v17 /* Search zero in loaded accept bytes. */ - vlgvb %r0,%v18,7 /* Get index of zero or 16 if not found. */ - clrjl %r0,%r4,.Lcheck_notonbb /* Zero index < loaded bytes count -> - Accept fits in one vreg; - Fill with zeros and proceed - with FAST. */ -.Lcheck_onbb2: - vl %v17,0(%r3) /* Load accept, which exceeds loaded bytes. */ - j .Lcheck_notonbb /* Check if accept fits in one vreg. */ - - - /* - Search s for accept in one vreg - ------------------------------- - */ -.Lfast: - /* Complete accept-string in v17 and remaining bytes are zero. */ - - vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */ - lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */ - - vfaezfs %v16,%v16,%v17,8 /* Find first element in v16 - unequal to any in v17 - or first zero element. */ - - vlgvb %r0,%v16,7 /* Load byte index of found element. */ - /* If found index is within loaded bytes (%r0 < %r1), - return with found element index (=equal count). */ - clr %r0,%r1 - srlg %r0,%r0,2 /* Convert byte-count to character-count. */ - locgrl %r2,%r0 - blr %r14 - - /* Align s to 16 byte. */ - risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ - lghi %r1,16 /* current_len = 16. */ - slr %r1,%r4 /* Compute bytes to 16bytes boundary. */ - -.Lfast_loop: - vl %v16,0(%r1,%r2) /* Load search-string. */ - vfaezfs %v16,%v16,%v17,8 /* Find first element in v16 - unequal to any in v17 - or first zero element. */ - jno .Lfast_loop_found - vl %v16,16(%r1,%r2) - vfaezfs %v16,%v16,%v17,8 - jno .Lfast_loop_found16 - vl %v16,32(%r1,%r2) - vfaezfs %v16,%v16,%v17,8 - jno .Lfast_loop_found32 - vl %v16,48(%r1,%r2) - vfaezfs %v16,%v16,%v17,8 - jno .Lfast_loop_found48 - - aghi %r1,64 - j .Lfast_loop /* Loop if no element was unequal to accept - and not zero. */ - - /* Found unequal or zero element. */ -.Lfast_loop_found48: - aghi %r1,16 -.Lfast_loop_found32: - aghi %r1,16 -.Lfast_loop_found16: - aghi %r1,16 -.Lfast_loop_found: - vlgvb %r0,%v16,7 /* Load byte index of found element. */ - algrk %r2,%r1,%r0 /* And add it to current len. */ - srlg %r2,%r2,2 /* Convert byte-count to character-count. */ - br %r14 - - - /* - Search s for accept in multiple vregs - ------------------------------------- - */ -.Lslow: - /* Save registers. */ - vlvgg %v30,%r6,0 - vlvgp %v31,%r8,%r9 - lghi %r1,0 /* Zero out current len. */ - - /* accept in v17 without zero. */ - vlr %v19,%v17 /* Save first acc-part for a fast reload. */ - vzero %v20 /* Zero for preparing acc-vector. */ - - /* Align s to 16 byte. */ - risbg %r0,%r2,60,128+63,0 /* Test if s is aligned and - %r0 = bits 60-63 'and' 15. */ - je .Lslow_loop_str /* If s is aligned, loop aligned */ - lghi %r4,15 - slr %r4,%r0 /* Compute highest index to load (15-x). */ - vll %v16,%r4,0(%r2) /* Load up to 16byte boundary (vll needs - highest index, remaining bytes are 0). */ - aghi %r4,1 /* Work with loaded byte count. */ - vzero %v21 /* Zero out global mask. */ - lghi %r5,0 /* Set current len of accept-string to zero. */ - vfenezf %v18,%v16,%v16 /* Find zero in current string-part. */ - lghi %r8,0 /* There is no zero in first accept-part. */ - vlgvb %r6,%v18,7 /* Load byte index of zero or 16 - if there is no zero. */ - clr %r4,%r6 /* cc==1 if loaded byte count < zero-index. */ - locrl %r6,%r4 /* Load on cc==1. */ - j .Lslow_loop_acc - - /* Process s in 16byte aligned loop. */ -.Lslow_next_str: - vlr %v17,%v19 /* Load first part of accept (no zero). */ - algfr %r1,%r4 /* Add loaded byte count to current len. */ -.Lslow_loop_str: - vl %v16,0(%r1,%r2) /* Load search-string. */ - lghi %r4,16 /* Loaded byte count is 16. */ - vzero %v21 /* Zero out global mask. */ - lghi %r5,0 /* Set current len of accept-string to zero. */ - vfenezf %v18,%v16,%v16 /* Find zero in current string-part. */ - lghi %r8,0 /* There is no zero in first accept-part. */ - vlgvb %r6,%v18,7 /* Load byte index of zero or 16 if no zero. */ - -.Lslow_loop_acc: - vfaef %v22,%v16,%v17,4 /* Create matching-mask (1 in mask -> - character matches any accepted character in - this accept-string-part) IN=0, RT=1. */ - vo %v21,%v21,%v22 /* global-mask = global- | matching-mask. */ - vfenezf %v18,%v21,%v21 /* Find first zero in global-mask. */ - vlgvb %r0,%v18,7 /* Get first found zero-index - (= first mismatch). */ - clrjl %r0,%r6,.Lslow_next_acc /* Mismatch-index < min(lbc,zero-index) - -> Process this string-part - with next acc-part. */ - clrjhe %r0,%r4,.Lslow_next_str /* Found-index >= loaded byte count - -> All loaded bytes are matching - any accept-character - and are not zero. */ - /* All bytes are matching any characters in accept-string - and search-string is fully processed (found-index == zero-index). */ -.Lslow_add_lbc_end: - algrk %r2,%r1,%r0 /* Add matching characters to current len. */ - srlg %r2,%r2,2 /* Convert byte-count to character-count. */ - /* Restore registers. */ - vlgvg %r6,%v30,0 - vlgvg %r8,%v31,0 - vlgvg %r9,%v31,1 - br %r14 - -.Lslow_next_acc: - clijh %r8,0,.Lslow_add_lbc_end /* There was a zero in last acc-part - -> Add found index to current len - and end. */ - vlbb %v17,16(%r5,%r3),6 /* Load next accept part. */ - aghi %r5,16 /* Increment current len of accept-string. */ - lcbb %r9,0(%r5,%r3),6 /* Get loaded byte count of accept-string. */ - jo .Lslow_next_acc_onbb /* Jump away if accept-string is - on block-boundary. */ -.Lslow_next_acc_notonbb: - vistrfs %v17,%v17 /* Fill with zeros after first zero. */ - jo .Lslow_loop_acc /* No zero found -> no preparation needed. */ - -.Lslow_next_acc_prepare_zero: - /* Zero in accept-part: fill zeros with first-accept-character. */ - vlgvf %r8,%v17,0 /* Load first element of acc-part. */ - clije %r8,0,.Lslow_add_lbc_end /* End if zero is first character - in this part of accept-string. */ - /* r8>0 -> zero found in this acc-part. */ - vrepf %v18,%v17,0 /* Replicate first char accross all chars. */ - vceqf %v22,%v20,%v17 /* Create a mask (v22) of null chars - by comparing with 0 (v20). */ - vsel %v17,%v18,%v17,%v22 /* Replace null chars with first char. */ - j .Lslow_loop_acc /* Accept part is prepared -> process. */ - -.Lslow_next_acc_onbb: - nill %r9,65532 /* Recognize only fully loaded characters. */ - je .Lslow_next_acc_onbb2 /* Reload vr, if we loaded no full - wchar_t. */ - vfenezf %v18,%v17,%v17 /* Find zero in loaded bytes of accept part. */ - vlgvb %r8,%v18,7 /* Load byte index of zero. */ - clrjl %r8,%r9,.Lslow_next_acc_notonbb /* Found a zero in loaded bytes - -> Prepare vreg. */ -.Lslow_next_acc_onbb2: - vl %v17,0(%r5,%r3) /* Load over boundary ... */ - lghi %r8,0 /* r8=0 -> no zero in this part of acc, - check for zero is in jump-target. */ - j .Lslow_next_acc_notonbb /* ... and search for zero in - fully loaded vreg again. */ -.Lfallback: - jg __wcsspn_c -END(__wcsspn_vx) -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ diff --git a/sysdeps/s390/multiarch/wcsspn.c b/sysdeps/s390/multiarch/wcsspn.c deleted file mode 100644 index 7743144..0000000 --- a/sysdeps/s390/multiarch/wcsspn.c +++ /dev/null @@ -1,29 +0,0 @@ -/* Multiple versions of wcsspn. - Copyright (C) 2015-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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 - . */ - -#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) -# define wcsspn __redirect_wcsspn -# include -# undef wcsspn -# include - -s390_vx_libc_ifunc2_redirected (__redirect_wcsspn, __wcsspn, wcsspn) - -#else -# include -#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ diff --git a/sysdeps/s390/wcsspn-c.c b/sysdeps/s390/wcsspn-c.c new file mode 100644 index 0000000..db3bdb9 --- /dev/null +++ b/sysdeps/s390/wcsspn-c.c @@ -0,0 +1,37 @@ +/* Default wcsspn implementation for S/390. + Copyright (C) 2015-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include + +#if HAVE_WCSSPN_C +# if HAVE_WCSSPN_IFUNC || HAVE_WCSSPN_Z13 +# define WCSSPN WCSSPN_C + +# if defined SHARED && IS_IN (libc) +# undef libc_hidden_def +# if ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT +# define libc_hidden_def(name) \ + __hidden_ver1 (__wcsspn_c, __GI_wcsspn, __wcsspn_c); +# else +# define libc_hidden_def(name) +# endif +# endif +# endif + +# include +#endif diff --git a/sysdeps/s390/wcsspn-vx.S b/sysdeps/s390/wcsspn-vx.S new file mode 100644 index 0000000..61f7d6d --- /dev/null +++ b/sysdeps/s390/wcsspn-vx.S @@ -0,0 +1,280 @@ +/* Vector optimized 32/64 bit S/390 version of wcsspn. + Copyright (C) 2015-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include +#if HAVE_WCSSPN_Z13 + +# include "sysdep.h" +# include "asm-syntax.h" + + .text + +/* size_t wcsspn (const wchar_t *s, const wchar_t * accept) + The wcsspn() function calculates the length of the initial segment + of s which consists entirely of characters in accept. + + This method checks the length of accept string. If it fits entirely + in one vector register, a fast algorithm is used, which does not need + to check multiple parts of accept-string. Otherwise a slower full + check of accept-string is used. + + register overview: + r3: pointer to start of accept-string + r2: pointer to start of search-string + r4: loaded byte count of vl search-string + r0: found byte index + r1: current return len of s + v16: search-string + v17: accept-string + v18: temp-vreg + + ONLY FOR SLOW: + v19: first accept-string + v20: zero for preparing acc-vector + v21: global mask; 1 indicates a match between + search-string-vreg and any accept-character + v22: current mask; 1 indicates a match between + search-string-vreg and any accept-character in current acc-vreg + v30, v31: for re-/storing registers r6, r8, r9 + r5: current len of accept-string + r6: zero-index in search-string or 16 if no zero + or min(zero-index, loaded byte count) + r8: >0, if former accept-string-part contains a zero, + otherwise =0; + r9: loaded byte count of vlbb accept-string +*/ +ENTRY(WCSSPN_Z13) + .machine "z13" + .machinemode "zarch_nohighgprs" + + tmll %r2,3 /* Test if s is 4-byte aligned? */ + jne .Lfallback /* And use common-code variant if not. */ + + /* + Check if accept-string fits in one vreg: + ---------------------------------------- + */ + vlbb %v17,0(%r3),6 /* Load accept. */ + lcbb %r4,0(%r3),6 + jo .Lcheck_onbb /* Special case if accept lays + on block-boundary. */ +.Lcheck_notonbb: + vistrfs %v17,%v17 /* Fill with zeros after first zero. */ + je .Lfast /* Zero found -> accept fits in one vreg. */ + j .Lslow /* No zero -> accept exceeds one vreg. */ + +.Lcheck_onbb: + /* Accept lays on block-boundary. */ + nill %r4,65532 /* Recognize only fully loaded characters. */ + je .Lcheck_onbb2 /* Reload vr if no full wchar_t. */ + vfenezf %v18,%v17,%v17 /* Search zero in loaded accept bytes. */ + vlgvb %r0,%v18,7 /* Get index of zero or 16 if not found. */ + clrjl %r0,%r4,.Lcheck_notonbb /* Zero index < loaded bytes count -> + Accept fits in one vreg; + Fill with zeros and proceed + with FAST. */ +.Lcheck_onbb2: + vl %v17,0(%r3) /* Load accept, which exceeds loaded bytes. */ + j .Lcheck_notonbb /* Check if accept fits in one vreg. */ + + + /* + Search s for accept in one vreg + ------------------------------- + */ +.Lfast: + /* Complete accept-string in v17 and remaining bytes are zero. */ + + vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */ + lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */ + + vfaezfs %v16,%v16,%v17,8 /* Find first element in v16 + unequal to any in v17 + or first zero element. */ + + vlgvb %r0,%v16,7 /* Load byte index of found element. */ + /* If found index is within loaded bytes (%r0 < %r1), + return with found element index (=equal count). */ + clr %r0,%r1 + srlg %r0,%r0,2 /* Convert byte-count to character-count. */ + locgrl %r2,%r0 + blr %r14 + + /* Align s to 16 byte. */ + risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ + lghi %r1,16 /* current_len = 16. */ + slr %r1,%r4 /* Compute bytes to 16bytes boundary. */ + +.Lfast_loop: + vl %v16,0(%r1,%r2) /* Load search-string. */ + vfaezfs %v16,%v16,%v17,8 /* Find first element in v16 + unequal to any in v17 + or first zero element. */ + jno .Lfast_loop_found + vl %v16,16(%r1,%r2) + vfaezfs %v16,%v16,%v17,8 + jno .Lfast_loop_found16 + vl %v16,32(%r1,%r2) + vfaezfs %v16,%v16,%v17,8 + jno .Lfast_loop_found32 + vl %v16,48(%r1,%r2) + vfaezfs %v16,%v16,%v17,8 + jno .Lfast_loop_found48 + + aghi %r1,64 + j .Lfast_loop /* Loop if no element was unequal to accept + and not zero. */ + + /* Found unequal or zero element. */ +.Lfast_loop_found48: + aghi %r1,16 +.Lfast_loop_found32: + aghi %r1,16 +.Lfast_loop_found16: + aghi %r1,16 +.Lfast_loop_found: + vlgvb %r0,%v16,7 /* Load byte index of found element. */ + algrk %r2,%r1,%r0 /* And add it to current len. */ + srlg %r2,%r2,2 /* Convert byte-count to character-count. */ + br %r14 + + + /* + Search s for accept in multiple vregs + ------------------------------------- + */ +.Lslow: + /* Save registers. */ + vlvgg %v30,%r6,0 + vlvgp %v31,%r8,%r9 + lghi %r1,0 /* Zero out current len. */ + + /* accept in v17 without zero. */ + vlr %v19,%v17 /* Save first acc-part for a fast reload. */ + vzero %v20 /* Zero for preparing acc-vector. */ + + /* Align s to 16 byte. */ + risbg %r0,%r2,60,128+63,0 /* Test if s is aligned and + %r0 = bits 60-63 'and' 15. */ + je .Lslow_loop_str /* If s is aligned, loop aligned */ + lghi %r4,15 + slr %r4,%r0 /* Compute highest index to load (15-x). */ + vll %v16,%r4,0(%r2) /* Load up to 16byte boundary (vll needs + highest index, remaining bytes are 0). */ + aghi %r4,1 /* Work with loaded byte count. */ + vzero %v21 /* Zero out global mask. */ + lghi %r5,0 /* Set current len of accept-string to zero. */ + vfenezf %v18,%v16,%v16 /* Find zero in current string-part. */ + lghi %r8,0 /* There is no zero in first accept-part. */ + vlgvb %r6,%v18,7 /* Load byte index of zero or 16 + if there is no zero. */ + clr %r4,%r6 /* cc==1 if loaded byte count < zero-index. */ + locrl %r6,%r4 /* Load on cc==1. */ + j .Lslow_loop_acc + + /* Process s in 16byte aligned loop. */ +.Lslow_next_str: + vlr %v17,%v19 /* Load first part of accept (no zero). */ + algfr %r1,%r4 /* Add loaded byte count to current len. */ +.Lslow_loop_str: + vl %v16,0(%r1,%r2) /* Load search-string. */ + lghi %r4,16 /* Loaded byte count is 16. */ + vzero %v21 /* Zero out global mask. */ + lghi %r5,0 /* Set current len of accept-string to zero. */ + vfenezf %v18,%v16,%v16 /* Find zero in current string-part. */ + lghi %r8,0 /* There is no zero in first accept-part. */ + vlgvb %r6,%v18,7 /* Load byte index of zero or 16 if no zero. */ + +.Lslow_loop_acc: + vfaef %v22,%v16,%v17,4 /* Create matching-mask (1 in mask -> + character matches any accepted character in + this accept-string-part) IN=0, RT=1. */ + vo %v21,%v21,%v22 /* global-mask = global- | matching-mask. */ + vfenezf %v18,%v21,%v21 /* Find first zero in global-mask. */ + vlgvb %r0,%v18,7 /* Get first found zero-index + (= first mismatch). */ + clrjl %r0,%r6,.Lslow_next_acc /* Mismatch-index < min(lbc,zero-index) + -> Process this string-part + with next acc-part. */ + clrjhe %r0,%r4,.Lslow_next_str /* Found-index >= loaded byte count + -> All loaded bytes are matching + any accept-character + and are not zero. */ + /* All bytes are matching any characters in accept-string + and search-string is fully processed (found-index == zero-index). */ +.Lslow_add_lbc_end: + algrk %r2,%r1,%r0 /* Add matching characters to current len. */ + srlg %r2,%r2,2 /* Convert byte-count to character-count. */ + /* Restore registers. */ + vlgvg %r6,%v30,0 + vlgvg %r8,%v31,0 + vlgvg %r9,%v31,1 + br %r14 + +.Lslow_next_acc: + clijh %r8,0,.Lslow_add_lbc_end /* There was a zero in last acc-part + -> Add found index to current len + and end. */ + vlbb %v17,16(%r5,%r3),6 /* Load next accept part. */ + aghi %r5,16 /* Increment current len of accept-string. */ + lcbb %r9,0(%r5,%r3),6 /* Get loaded byte count of accept-string. */ + jo .Lslow_next_acc_onbb /* Jump away if accept-string is + on block-boundary. */ +.Lslow_next_acc_notonbb: + vistrfs %v17,%v17 /* Fill with zeros after first zero. */ + jo .Lslow_loop_acc /* No zero found -> no preparation needed. */ + +.Lslow_next_acc_prepare_zero: + /* Zero in accept-part: fill zeros with first-accept-character. */ + vlgvf %r8,%v17,0 /* Load first element of acc-part. */ + clije %r8,0,.Lslow_add_lbc_end /* End if zero is first character + in this part of accept-string. */ + /* r8>0 -> zero found in this acc-part. */ + vrepf %v18,%v17,0 /* Replicate first char accross all chars. */ + vceqf %v22,%v20,%v17 /* Create a mask (v22) of null chars + by comparing with 0 (v20). */ + vsel %v17,%v18,%v17,%v22 /* Replace null chars with first char. */ + j .Lslow_loop_acc /* Accept part is prepared -> process. */ + +.Lslow_next_acc_onbb: + nill %r9,65532 /* Recognize only fully loaded characters. */ + je .Lslow_next_acc_onbb2 /* Reload vr, if we loaded no full + wchar_t. */ + vfenezf %v18,%v17,%v17 /* Find zero in loaded bytes of accept part. */ + vlgvb %r8,%v18,7 /* Load byte index of zero. */ + clrjl %r8,%r9,.Lslow_next_acc_notonbb /* Found a zero in loaded bytes + -> Prepare vreg. */ +.Lslow_next_acc_onbb2: + vl %v17,0(%r5,%r3) /* Load over boundary ... */ + lghi %r8,0 /* r8=0 -> no zero in this part of acc, + check for zero is in jump-target. */ + j .Lslow_next_acc_notonbb /* ... and search for zero in + fully loaded vreg again. */ +.Lfallback: + jg WCSSPN_C +END(WCSSPN_Z13) + +# if ! HAVE_WCSSPN_IFUNC +strong_alias (WCSSPN_Z13, wcsspn) +# endif + +# if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT \ + && defined SHARED && IS_IN (libc) +strong_alias (WCSSPN_Z13, __GI_wcsspn) +# endif +#endif diff --git a/sysdeps/s390/wcsspn.c b/sysdeps/s390/wcsspn.c new file mode 100644 index 0000000..e916b1e --- /dev/null +++ b/sysdeps/s390/wcsspn.c @@ -0,0 +1,39 @@ +/* Multiple versions of wcsspn. + Copyright (C) 2015-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include + +#if HAVE_WCSSPN_IFUNC +# define wcsspn __redirect_wcsspn +# include +# undef wcsspn +# include +# if HAVE_WCSSPN_C +extern __typeof (__redirect_wcsspn) WCSSPN_C attribute_hidden; +# endif + +# if HAVE_WCSSPN_Z13 +extern __typeof (__redirect_wcsspn) WCSSPN_Z13 attribute_hidden; +# endif + +s390_libc_ifunc_expr (__redirect_wcsspn, wcsspn, + (HAVE_WCSSPN_Z13 && (hwcap & HWCAP_S390_VX)) + ? WCSSPN_Z13 + : WCSSPN_DEFAULT + ) +#endif -- cgit v1.1