From 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 Mon Sep 17 00:00:00 2001 From: Zack Weinberg Date: Thu, 8 Jun 2017 15:39:03 -0400 Subject: Prepare for radical source tree reorganization. All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control). --- .../sysdeps/i386/i686/multiarch/memrchr-sse2.S | 724 +++++++++++++++++++++ 1 file changed, 724 insertions(+) create mode 100644 REORG.TODO/sysdeps/i386/i686/multiarch/memrchr-sse2.S (limited to 'REORG.TODO/sysdeps/i386/i686/multiarch/memrchr-sse2.S') diff --git a/REORG.TODO/sysdeps/i386/i686/multiarch/memrchr-sse2.S b/REORG.TODO/sysdeps/i386/i686/multiarch/memrchr-sse2.S new file mode 100644 index 0000000000..5f7853f683 --- /dev/null +++ b/REORG.TODO/sysdeps/i386/i686/multiarch/memrchr-sse2.S @@ -0,0 +1,724 @@ +/* Optimized memrchr with sse2 without bsf + Copyright (C) 2011-2017 Free Software Foundation, Inc. + Contributed by Intel Corporation. + 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 IS_IN (libc) + +# include +# define CFI_PUSH(REG) \ + cfi_adjust_cfa_offset (4); \ + cfi_rel_offset (REG, 0) + +# define CFI_POP(REG) \ + cfi_adjust_cfa_offset (-4); \ + cfi_restore (REG) + +# define PUSH(REG) pushl REG; CFI_PUSH (REG) +# define POP(REG) popl REG; CFI_POP (REG) + +# define PARMS 4 +# define STR1 PARMS +# define STR2 STR1+4 +# define LEN STR2+4 + + atom_text_section +ENTRY (__memrchr_sse2) + mov STR1(%esp), %ecx + movd STR2(%esp), %xmm1 + mov LEN(%esp), %edx + + sub $16, %edx + jbe L(length_less16) + + punpcklbw %xmm1, %xmm1 + add %edx, %ecx + punpcklbw %xmm1, %xmm1 + + movdqu (%ecx), %xmm0 + pshufd $0, %xmm1, %xmm1 + pcmpeqb %xmm1, %xmm0 + + pmovmskb %xmm0, %eax + test %eax, %eax + jnz L(exit_dispatch) + + sub $64, %ecx + mov %ecx, %eax + and $15, %eax + jz L(loop_prolog) + + lea 16(%ecx), %ecx + lea 16(%edx), %edx + sub %eax, %edx + and $-16, %ecx + + .p2align 4 +/* Loop start on aligned string. */ +L(loop_prolog): + sub $64, %edx + jbe L(exit_loop) + + movdqa 48(%ecx), %xmm0 + pcmpeqb %xmm1, %xmm0 + pmovmskb %xmm0, %eax + test %eax, %eax + jnz L(matches48) + + movdqa 32(%ecx), %xmm2 + pcmpeqb %xmm1, %xmm2 + pmovmskb %xmm2, %eax + test %eax, %eax + jnz L(matches32) + + movdqa 16(%ecx), %xmm3 + pcmpeqb %xmm1, %xmm3 + pmovmskb %xmm3, %eax + test %eax, %eax + jnz L(matches16) + + movdqa (%ecx), %xmm4 + pcmpeqb %xmm1, %xmm4 + pmovmskb %xmm4, %eax + test %eax, %eax + jnz L(exit_dispatch) + + sub $64, %ecx + sub $64, %edx + jbe L(exit_loop) + + movdqa 48(%ecx), %xmm0 + pcmpeqb %xmm1, %xmm0 + pmovmskb %xmm0, %eax + test %eax, %eax + jnz L(matches48) + + movdqa 32(%ecx), %xmm2 + pcmpeqb %xmm1, %xmm2 + pmovmskb %xmm2, %eax + test %eax, %eax + jnz L(matches32) + + movdqa 16(%ecx), %xmm3 + pcmpeqb %xmm1, %xmm3 + pmovmskb %xmm3, %eax + test %eax, %eax + jnz L(matches16) + + movdqa (%ecx), %xmm3 + pcmpeqb %xmm1, %xmm3 + pmovmskb %xmm3, %eax + test %eax, %eax + jnz L(exit_dispatch) + + mov %ecx, %eax + and $63, %eax + test %eax, %eax + jz L(align64_loop) + + lea 64(%ecx), %ecx + lea 64(%edx), %edx + and $-64, %ecx + sub %eax, %edx + + .p2align 4 +L(align64_loop): + sub $64, %ecx + sub $64, %edx + jbe L(exit_loop) + + movdqa (%ecx), %xmm0 + movdqa 16(%ecx), %xmm2 + movdqa 32(%ecx), %xmm3 + movdqa 48(%ecx), %xmm4 + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm1, %xmm2 + pcmpeqb %xmm1, %xmm3 + pcmpeqb %xmm1, %xmm4 + + pmaxub %xmm3, %xmm0 + pmaxub %xmm4, %xmm2 + pmaxub %xmm0, %xmm2 + pmovmskb %xmm2, %eax + + test %eax, %eax + jz L(align64_loop) + + pmovmskb %xmm4, %eax + test %eax, %eax + jnz L(matches48) + + pmovmskb %xmm3, %eax + test %eax, %eax + jnz L(matches32) + + movdqa 16(%ecx), %xmm2 + + pcmpeqb %xmm1, %xmm2 + pcmpeqb (%ecx), %xmm1 + + pmovmskb %xmm2, %eax + test %eax, %eax + jnz L(matches16) + + pmovmskb %xmm1, %eax + test %ah, %ah + jnz L(exit_dispatch_high) + mov %al, %dl + and $15 << 4, %dl + jnz L(exit_dispatch_8) + test $0x08, %al + jnz L(exit_4) + test $0x04, %al + jnz L(exit_3) + test $0x02, %al + jnz L(exit_2) + mov %ecx, %eax + ret + + .p2align 4 +L(exit_loop): + add $64, %edx + cmp $32, %edx + jbe L(exit_loop_32) + + movdqa 48(%ecx), %xmm0 + pcmpeqb %xmm1, %xmm0 + pmovmskb %xmm0, %eax + test %eax, %eax + jnz L(matches48) + + movdqa 32(%ecx), %xmm2 + pcmpeqb %xmm1, %xmm2 + pmovmskb %xmm2, %eax + test %eax, %eax + jnz L(matches32) + + movdqa 16(%ecx), %xmm3 + pcmpeqb %xmm1, %xmm3 + pmovmskb %xmm3, %eax + test %eax, %eax + jnz L(matches16_1) + cmp $48, %edx + jbe L(return_null) + + pcmpeqb (%ecx), %xmm1 + pmovmskb %xmm1, %eax + test %eax, %eax + jnz L(matches0_1) + xor %eax, %eax + ret + + .p2align 4 +L(exit_loop_32): + movdqa 48(%ecx), %xmm0 + pcmpeqb %xmm1, %xmm0 + pmovmskb %xmm0, %eax + test %eax, %eax + jnz L(matches48_1) + cmp $16, %edx + jbe L(return_null) + + pcmpeqb 32(%ecx), %xmm1 + pmovmskb %xmm1, %eax + test %eax, %eax + jnz L(matches32_1) + xor %eax, %eax + ret + + .p2align 4 +L(matches16): + lea 16(%ecx), %ecx + test %ah, %ah + jnz L(exit_dispatch_high) + mov %al, %dl + and $15 << 4, %dl + jnz L(exit_dispatch_8) + test $0x08, %al + jnz L(exit_4) + test $0x04, %al + jnz L(exit_3) + test $0x02, %al + jnz L(exit_2) + mov %ecx, %eax + ret + + .p2align 4 +L(matches32): + lea 32(%ecx), %ecx + test %ah, %ah + jnz L(exit_dispatch_high) + mov %al, %dl + and $15 << 4, %dl + jnz L(exit_dispatch_8) + test $0x08, %al + jnz L(exit_4) + test $0x04, %al + jnz L(exit_3) + test $0x02, %al + jnz L(exit_2) + mov %ecx, %eax + ret + + .p2align 4 +L(matches48): + lea 48(%ecx), %ecx + + .p2align 4 +L(exit_dispatch): + test %ah, %ah + jnz L(exit_dispatch_high) + mov %al, %dl + and $15 << 4, %dl + jnz L(exit_dispatch_8) + test $0x08, %al + jnz L(exit_4) + test $0x04, %al + jnz L(exit_3) + test $0x02, %al + jnz L(exit_2) + mov %ecx, %eax + ret + + .p2align 4 +L(exit_dispatch_8): + test $0x80, %al + jnz L(exit_8) + test $0x40, %al + jnz L(exit_7) + test $0x20, %al + jnz L(exit_6) + lea 4(%ecx), %eax + ret + + .p2align 4 +L(exit_dispatch_high): + mov %ah, %dh + and $15 << 4, %dh + jnz L(exit_dispatch_high_8) + test $0x08, %ah + jnz L(exit_12) + test $0x04, %ah + jnz L(exit_11) + test $0x02, %ah + jnz L(exit_10) + lea 8(%ecx), %eax + ret + + .p2align 4 +L(exit_dispatch_high_8): + test $0x80, %ah + jnz L(exit_16) + test $0x40, %ah + jnz L(exit_15) + test $0x20, %ah + jnz L(exit_14) + lea 12(%ecx), %eax + ret + + .p2align 4 +L(exit_2): + lea 1(%ecx), %eax + ret + + .p2align 4 +L(exit_3): + lea 2(%ecx), %eax + ret + + .p2align 4 +L(exit_4): + lea 3(%ecx), %eax + ret + + .p2align 4 +L(exit_6): + lea 5(%ecx), %eax + ret + + .p2align 4 +L(exit_7): + lea 6(%ecx), %eax + ret + + .p2align 4 +L(exit_8): + lea 7(%ecx), %eax + ret + + .p2align 4 +L(exit_10): + lea 9(%ecx), %eax + ret + + .p2align 4 +L(exit_11): + lea 10(%ecx), %eax + ret + + .p2align 4 +L(exit_12): + lea 11(%ecx), %eax + ret + + .p2align 4 +L(exit_14): + lea 13(%ecx), %eax + ret + + .p2align 4 +L(exit_15): + lea 14(%ecx), %eax + ret + + .p2align 4 +L(exit_16): + lea 15(%ecx), %eax + ret + + .p2align 4 +L(matches0_1): + lea -64(%edx), %edx + + test %ah, %ah + jnz L(exit_dispatch_1_high) + mov %al, %ah + and $15 << 4, %ah + jnz L(exit_dispatch_1_8) + test $0x08, %al + jnz L(exit_1_4) + test $0x04, %al + jnz L(exit_1_3) + test $0x02, %al + jnz L(exit_1_2) + add $0, %edx + jl L(return_null) + mov %ecx, %eax + ret + + .p2align 4 +L(matches16_1): + lea -48(%edx), %edx + lea 16(%ecx), %ecx + + test %ah, %ah + jnz L(exit_dispatch_1_high) + mov %al, %ah + and $15 << 4, %ah + jnz L(exit_dispatch_1_8) + test $0x08, %al + jnz L(exit_1_4) + test $0x04, %al + jnz L(exit_1_3) + test $0x02, %al + jnz L(exit_1_2) + add $0, %edx + jl L(return_null) + mov %ecx, %eax + ret + + .p2align 4 +L(matches32_1): + lea -32(%edx), %edx + lea 32(%ecx), %ecx + + test %ah, %ah + jnz L(exit_dispatch_1_high) + mov %al, %ah + and $15 << 4, %ah + jnz L(exit_dispatch_1_8) + test $0x08, %al + jnz L(exit_1_4) + test $0x04, %al + jnz L(exit_1_3) + test $0x02, %al + jnz L(exit_1_2) + add $0, %edx + jl L(return_null) + mov %ecx, %eax + ret + + .p2align 4 +L(matches48_1): + lea -16(%edx), %edx + lea 48(%ecx), %ecx + + .p2align 4 +L(exit_dispatch_1): + test %ah, %ah + jnz L(exit_dispatch_1_high) + mov %al, %ah + and $15 << 4, %ah + jnz L(exit_dispatch_1_8) + test $0x08, %al + jnz L(exit_1_4) + test $0x04, %al + jnz L(exit_1_3) + test $0x02, %al + jnz L(exit_1_2) + add $0, %edx + jl L(return_null) + mov %ecx, %eax + ret + + .p2align 4 +L(exit_dispatch_1_8): + test $0x80, %al + jnz L(exit_1_8) + test $0x40, %al + jnz L(exit_1_7) + test $0x20, %al + jnz L(exit_1_6) + add $4, %edx + jl L(return_null) + lea 4(%ecx), %eax + ret + + .p2align 4 +L(exit_dispatch_1_high): + mov %ah, %al + and $15 << 4, %al + jnz L(exit_dispatch_1_high_8) + test $0x08, %ah + jnz L(exit_1_12) + test $0x04, %ah + jnz L(exit_1_11) + test $0x02, %ah + jnz L(exit_1_10) + add $8, %edx + jl L(return_null) + lea 8(%ecx), %eax + ret + + .p2align 4 +L(exit_dispatch_1_high_8): + test $0x80, %ah + jnz L(exit_1_16) + test $0x40, %ah + jnz L(exit_1_15) + test $0x20, %ah + jnz L(exit_1_14) + add $12, %edx + jl L(return_null) + lea 12(%ecx), %eax + ret + + .p2align 4 +L(exit_1_2): + add $1, %edx + jl L(return_null) + lea 1(%ecx), %eax + ret + + .p2align 4 +L(exit_1_3): + add $2, %edx + jl L(return_null) + lea 2(%ecx), %eax + ret + + .p2align 4 +L(exit_1_4): + add $3, %edx + jl L(return_null) + lea 3(%ecx), %eax + ret + + .p2align 4 +L(exit_1_6): + add $5, %edx + jl L(return_null) + lea 5(%ecx), %eax + ret + + .p2align 4 +L(exit_1_7): + add $6, %edx + jl L(return_null) + lea 6(%ecx), %eax + ret + + .p2align 4 +L(exit_1_8): + add $7, %edx + jl L(return_null) + lea 7(%ecx), %eax + ret + + .p2align 4 +L(exit_1_10): + add $9, %edx + jl L(return_null) + lea 9(%ecx), %eax + ret + + .p2align 4 +L(exit_1_11): + add $10, %edx + jl L(return_null) + lea 10(%ecx), %eax + ret + + .p2align 4 +L(exit_1_12): + add $11, %edx + jl L(return_null) + lea 11(%ecx), %eax + ret + + .p2align 4 +L(exit_1_14): + add $13, %edx + jl L(return_null) + lea 13(%ecx), %eax + ret + + .p2align 4 +L(exit_1_15): + add $14, %edx + jl L(return_null) + lea 14(%ecx), %eax + ret + + .p2align 4 +L(exit_1_16): + add $15, %edx + jl L(return_null) + lea 15(%ecx), %eax + ret + + .p2align 4 +L(return_null): + xor %eax, %eax + ret + + .p2align 4 +L(length_less16_offset0): + mov %dl, %cl + pcmpeqb (%eax), %xmm1 + + mov $1, %edx + sal %cl, %edx + sub $1, %edx + + mov %eax, %ecx + pmovmskb %xmm1, %eax + + and %edx, %eax + test %eax, %eax + jnz L(exit_dispatch) + + xor %eax, %eax + ret + + .p2align 4 +L(length_less16): + punpcklbw %xmm1, %xmm1 + add $16, %edx + je L(return_null) + punpcklbw %xmm1, %xmm1 + + mov %ecx, %eax + pshufd $0, %xmm1, %xmm1 + + and $15, %ecx + jz L(length_less16_offset0) + + PUSH (%edi) + + mov %cl, %dh + add %dl, %dh + and $-16, %eax + + sub $16, %dh + ja L(length_less16_part2) + + pcmpeqb (%eax), %xmm1 + pmovmskb %xmm1, %edi + + sar %cl, %edi + add %ecx, %eax + mov %dl, %cl + + mov $1, %edx + sal %cl, %edx + sub $1, %edx + + and %edx, %edi + test %edi, %edi + jz L(ret_null) + + bsr %edi, %edi + add %edi, %eax + POP (%edi) + ret + + CFI_PUSH (%edi) + + .p2align 4 +L(length_less16_part2): + movdqa 16(%eax), %xmm2 + pcmpeqb %xmm1, %xmm2 + pmovmskb %xmm2, %edi + + mov %cl, %ch + + mov %dh, %cl + mov $1, %edx + sal %cl, %edx + sub $1, %edx + + and %edx, %edi + + test %edi, %edi + jnz L(length_less16_part2_return) + + pcmpeqb (%eax), %xmm1 + pmovmskb %xmm1, %edi + + mov %ch, %cl + sar %cl, %edi + test %edi, %edi + jz L(ret_null) + + bsr %edi, %edi + add %edi, %eax + xor %ch, %ch + add %ecx, %eax + POP (%edi) + ret + + CFI_PUSH (%edi) + + .p2align 4 +L(length_less16_part2_return): + bsr %edi, %edi + lea 16(%eax, %edi), %eax + POP (%edi) + ret + + CFI_PUSH (%edi) + + .p2align 4 +L(ret_null): + xor %eax, %eax + POP (%edi) + ret + +END (__memrchr_sse2) +#endif -- cgit 1.4.1