+2010-03-10 Luis Machado <luisgpm@br.ibm.com>
+
+ * sysdeps/powerpc/powerpc64/power7/memcpy.S: New file.
+ * sysdeps/powerpc/powerpc32/power7/memcpy.S: New file.
+
2010-03-09 David S. Miller <davem@davemloft.net>
* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Handling
--- /dev/null
+/* Optimized memcpy implementation for PowerPC32/POWER7.
+ Copyright (C) 2010 Free Software Foundation, Inc.
+ Contributed by Luis Machado <luisgpm@br.ibm.com>.
+ 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, write to the Free
+ Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+ 02110-1301 USA. */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* __ptr_t [r3] memcpy (__ptr_t dst [r3], __ptr_t src [r4], size_t len [r5]);
+ Returns 'dst'. */
+
+ .machine power7
+EALIGN (BP_SYM (memcpy), 5, 0)
+ CALL_MCOUNT
+
+ stwu 1,-32(1)
+ cfi_adjust_cfa_offset(32)
+ stw 30,20(1)
+ cfi_offset(30,(20-32))
+ stw 31,24(1)
+ mr 30,3
+ cmplwi cr1,5,31
+ neg 0,3
+ cfi_offset(31,-8)
+ ble cr1, L(copy_LT_32) /* If move < 32 bytes use short move
+ code. */
+
+ andi. 11,3,7 /* Check alignment of DST. */
+ clrlwi 10,4,29 /* Check alignment of SRC. */
+ cmplw cr6,10,11 /* SRC and DST alignments match? */
+ mr 12,4
+ mr 31,5
+ bne cr6,L(copy_GE_32_unaligned)
+
+ srwi 9,5,3 /* Number of full quadwords remaining. */
+
+ beq L(copy_GE_32_aligned_cont)
+
+ clrlwi 0,0,29
+ mtcrf 0x01,0
+ subf 31,0,5
+
+ /* Get the SRC aligned to 8 bytes. */
+
+1: bf 31,2f
+ lbz 6,0(12)
+ addi 12,12,1
+ stb 6,0(3)
+ addi 3,3,1
+2: bf 30,4f
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+4: bf 29,0f
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+0:
+ clrlwi 10,12,29 /* Check alignment of SRC again. */
+ srwi 9,31,3 /* Number of full doublewords remaining. */
+
+L(copy_GE_32_aligned_cont):
+
+ clrlwi 11,31,29
+ mtcrf 0x01,9
+
+ srwi 8,31,5
+ cmplwi cr1,9,4
+ cmplwi cr6,11,0
+ mr 11,12
+
+ /* Copy 1~3 doublewords so the main loop starts
+ at a multiple of 32 bytes. */
+
+ bf 30,1f
+ lfd 6,0(12)
+ lfd 7,8(12)
+ addi 11,12,16
+ mtctr 8
+ stfd 6,0(3)
+ stfd 7,8(3)
+ addi 10,3,16
+ bf 31,4f
+ lfd 0,16(12)
+ stfd 0,16(3)
+ blt cr1,3f
+ addi 11,12,24
+ addi 10,3,24
+ b 4f
+
+ .align 4
+1: /* Copy 1 doubleword and set the counter. */
+ mr 10,3
+ mtctr 8
+ bf 31,4f
+ lfd 6,0(12)
+ addi 11,12,8
+ stfd 6,0(3)
+ addi 10,3,8
+
+ .align 4
+4: /* Main aligned copy loop. Copies 32-bytes at a time. */
+ lfd 6,0(11)
+ lfd 7,8(11)
+ lfd 8,16(11)
+ lfd 0,24(11)
+ addi 11,11,32
+
+ stfd 6,0(10)
+ stfd 7,8(10)
+ stfd 8,16(10)
+ stfd 0,24(10)
+ addi 10,10,32
+ bdnz 4b
+3:
+
+ /* Check for tail bytes. */
+
+ clrrwi 0,31,3
+ mtcrf 0x01,31
+ beq cr6,0f
+
+.L9:
+ add 3,3,0
+ add 12,12,0
+
+ /* At this point we have a tail of 0-7 bytes and we know that the
+ destination is doubleword-aligned. */
+4: /* Copy 4 bytes. */
+ bf 29,2f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+2: /* Copy 2 bytes. */
+ bf 30,1f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+1: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,0(12)
+ stb 6,0(3)
+0: /* Return original DST pointer. */
+ mr 3,30
+ lwz 30,20(1)
+ lwz 31,24(1)
+ addi 1,1,32
+ blr
+
+ /* Handle copies of 0~31 bytes. */
+ .align 4
+L(copy_LT_32):
+ cmplwi cr6,5,8
+ mr 12,4
+ mtcrf 0x01,5
+ ble cr6,L(copy_LE_8)
+
+ /* At least 9 bytes to go. */
+ neg 8,4
+ clrrwi 11,4,2
+ andi. 0,8,3
+ cmplwi cr1,5,16
+ mr 10,5
+ beq L(copy_LT_32_aligned)
+
+ /* Force 4-bytes alignment for SRC. */
+ mtocrf 0x01,0
+ subf 10,0,5
+2: bf 30,1f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+1: bf 31,L(end_4bytes_alignment)
+
+ lbz 6,0(12)
+ addi 12,12,1
+ stb 6,0(3)
+ addi 3,3,1
+
+ .align 4
+L(end_4bytes_alignment):
+ cmplwi cr1,10,16
+ mtcrf 0x01,10
+
+L(copy_LT_32_aligned):
+ /* At least 6 bytes to go, and SRC is word-aligned. */
+ blt cr1,8f
+
+ /* Copy 16 bytes. */
+ lwz 6,0(12)
+ lwz 7,4(12)
+ stw 6,0(3)
+ lwz 8,8(12)
+ stw 7,4(3)
+ lwz 6,12(12)
+ addi 12,12,16
+ stw 8,8(3)
+ stw 6,12(3)
+ addi 3,3,16
+8: /* Copy 8 bytes. */
+ bf 28,4f
+
+ lwz 6,0(12)
+ lwz 7,4(12)
+ addi 12,12,8
+ stw 6,0(3)
+ stw 7,4(3)
+ addi 3,3,8
+4: /* Copy 4 bytes. */
+ bf 29,2f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+2: /* Copy 2-3 bytes. */
+ bf 30,1f
+
+ lhz 6,0(12)
+ sth 6,0(3)
+ bf 31,0f
+ lbz 7,2(12)
+ stb 7,2(3)
+
+ /* Return original DST pointer. */
+ mr 3,30
+ lwz 30,20(1)
+ addi 1,1,32
+ blr
+
+ .align 4
+1: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,0(12)
+ stb 6,0(3)
+0: /* Return original DST pointer. */
+ mr 3,30
+ lwz 30,20(1)
+ addi 1,1,32
+ blr
+
+ /* Handles copies of 0~8 bytes. */
+ .align 4
+L(copy_LE_8):
+ bne cr6,4f
+
+ /* Though we could've used lfd/stfd here, they are still
+ slow for unaligned cases. */
+
+ lwz 6,0(4)
+ lwz 7,4(4)
+ stw 6,0(3)
+ stw 7,4(3)
+
+ /* Return original DST pointer. */
+ mr 3,30
+ lwz 30,20(1)
+ addi 1,1,32
+ blr
+
+ .align 4
+4: /* Copies 4~7 bytes. */
+ bf 29,2b
+
+ lwz 6,0(4)
+ stw 6,0(3)
+ bf 30,5f
+ lhz 7,4(4)
+ sth 7,4(3)
+ bf 31,0f
+ lbz 8,6(4)
+ stb 8,6(3)
+
+ /* Return original DST pointer. */
+ mr 3,30
+ lwz 30,20(1)
+ addi 1,1,32
+ blr
+
+ .align 4
+5: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,4(4)
+ stb 6,4(3)
+
+0: /* Return original DST pointer. */
+ mr 3,30
+ lwz 30,20(1)
+ addi 1,1,32
+ blr
+
+ /* Handle copies of 32+ bytes where DST is aligned (to quadword) but
+ SRC is not. Use aligned quadword loads from SRC, shifted to realign
+ the data, allowing for aligned DST stores. */
+ .align 4
+L(copy_GE_32_unaligned):
+ andi. 11,3,15 /* Check alignment of DST. */
+ clrlwi 0,0,28 /* Number of bytes until the 1st
+ quadword of DST. */
+ srwi 9,5,4 /* Number of full quadwords remaining. */
+
+ beq L(copy_GE_32_unaligned_cont)
+
+ /* SRC is not quadword aligned, get it aligned. */
+
+ mtcrf 0x01,0
+ subf 31,0,5
+
+ /* Vector instructions work best when proper alignment (16-bytes)
+ is present. Move 0~15 bytes as needed to get DST quadword-aligned. */
+1: /* Copy 1 byte. */
+ bf 31,2f
+
+ lbz 6,0(12)
+ addi 12,12,1
+ stb 6,0(3)
+ addi 3,3,1
+2: /* Copy 2 bytes. */
+ bf 30,4f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+4: /* Copy 4 bytes. */
+ bf 29,8f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+8: /* Copy 8 bytes. */
+ bf 28,0f
+
+ lfd 6,0(12)
+ addi 12,12,8
+ stfd 6,0(3)
+ addi 3,3,8
+0:
+ clrlwi 10,12,28 /* Check alignment of SRC. */
+ srdi 9,31,4 /* Number of full quadwords remaining. */
+
+ /* The proper alignment is present, it is OK to copy the bytes now. */
+L(copy_GE_32_unaligned_cont):
+
+ /* Setup two indexes to speed up the indexed vector operations. */
+ clrlwi 11,31,28
+ li 6,16 /* Index for 16-bytes offsets. */
+ li 7,32 /* Index for 32-bytes offsets. */
+ cmplwi cr1,11,0
+ srdi 8,31,5 /* Setup the loop counter. */
+ mr 10,3
+ mr 11,12
+ mtcrf 0x01,9
+ cmplwi cr6,9,1
+ lvsl 5,0,12
+ lvx 3,0,12
+ bf 31,L(setup_unaligned_loop)
+
+ /* Copy another 16 bytes to align to 32-bytes due to the loop . */
+ lvx 4,12,6
+ vperm 6,3,4,5
+ addi 11,12,16
+ addi 10,3,16
+ stvx 6,0,3
+ vor 3,4,4
+
+L(setup_unaligned_loop):
+ mtctr 8
+ ble cr6,L(end_unaligned_loop)
+
+ /* Copy 32 bytes at a time using vector instructions. */
+ .align 4
+L(unaligned_loop):
+
+ /* Note: vr6/vr10 may contain data that was already copied,
+ but in order to get proper alignment, we may have to copy
+ some portions again. This is faster than having unaligned
+ vector instructions though. */
+
+ lvx 4,11,6 /* vr4 = r11+16. */
+ vperm 6,3,4,5 /* Merge the correctly-aligned portions
+ of vr3/vr4 into vr6. */
+ lvx 3,11,7 /* vr3 = r11+32. */
+ vperm 10,4,3,5 /* Merge the correctly-aligned portions
+ of vr3/vr4 into vr10. */
+ addi 11,11,32
+ stvx 6,0,10
+ stvx 10,10,6
+ addi 10,10,32
+
+ bdnz L(unaligned_loop)
+
+ .align 4
+L(end_unaligned_loop):
+
+ /* Check for tail bytes. */
+ clrrwi 0,31,4
+ mtcrf 0x01,31
+ beq cr1,0f
+
+ add 3,3,0
+ add 12,12,0
+
+ /* We have 1~15 tail bytes to copy, and DST is quadword aligned. */
+8: /* Copy 8 bytes. */
+ bf 28,4f
+
+ lwz 6,0(12)
+ lwz 7,4(12)
+ addi 12,12,8
+ stw 6,0(3)
+ stw 7,4(3)
+ addi 3,3,8
+4: /* Copy 4 bytes. */
+ bf 29,2f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+2: /* Copy 2~3 bytes. */
+ bf 30,1f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+1: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,0(12)
+ stb 6,0(3)
+0: /* Return original DST pointer. */
+ mr 3,30
+ lwz 30,20(1)
+ lwz 31,24(1)
+ addi 1,1,32
+ blr
+
+END (BP_SYM (memcpy))
+libc_hidden_builtin_def (memcpy)
--- /dev/null
+/* Optimized memcpy implementation for PowerPC64/POWER7.
+ Copyright (C) 2010 Free Software Foundation, Inc.
+ Contributed by Luis Machado <luisgpm@br.ibm.com>.
+ 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, write to the Free
+ Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+ 02110-1301 USA. */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+
+/* __ptr_t [r3] memcpy (__ptr_t dst [r3], __ptr_t src [r4], size_t len [r5]);
+ Returns 'dst'. */
+
+ .machine power7
+EALIGN (BP_SYM (memcpy), 5, 0)
+ CALL_MCOUNT 3
+
+ cmpldi cr1,5,31
+ neg 0,3
+ std 3,-16(1)
+ std 31,-8(1)
+ cfi_offset(31,-8)
+ ble cr1, L(copy_LT_32) /* If move < 32 bytes use short move
+ code. */
+
+ andi. 11,3,7 /* Check alignment of DST. */
+
+
+ clrldi 10,4,61 /* Check alignment of SRC. */
+ cmpld cr6,10,11 /* SRC and DST alignments match? */
+ mr 12,4
+ mr 31,5
+ bne cr6,L(copy_GE_32_unaligned)
+
+ srdi 9,5,3 /* Number of full quadwords remaining. */
+
+ beq L(copy_GE_32_aligned_cont)
+
+ clrldi 0,0,61
+ mtcrf 0x01,0
+ subf 31,0,5
+
+ /* Get the SRC aligned to 8 bytes. */
+
+1: bf 31,2f
+ lbz 6,0(12)
+ addi 12,12,1
+ stb 6,0(3)
+ addi 3,3,1
+2: bf 30,4f
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+4: bf 29,0f
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+0:
+ clrldi 10,12,61 /* Check alignment of SRC again. */
+ srdi 9,31,3 /* Number of full doublewords remaining. */
+
+L(copy_GE_32_aligned_cont):
+
+ clrldi 11,31,61
+ mtcrf 0x01,9
+
+ srdi 8,31,5
+ cmpldi cr1,9,4
+ cmpldi cr6,11,0
+ mr 11,12
+
+ /* Copy 1~3 doublewords so the main loop starts
+ at a multiple of 32 bytes. */
+
+ bf 30,1f
+ ld 6,0(12)
+ ld 7,8(12)
+ addi 11,12,16
+ mtctr 8
+ std 6,0(3)
+ std 7,8(3)
+ addi 10,3,16
+ bf 31,4f
+ ld 0,16(12)
+ std 0,16(3)
+ blt cr1,3f
+ addi 11,12,24
+ addi 10,3,24
+ b 4f
+
+ .align 4
+1: /* Copy 1 doubleword and set the counter. */
+ mr 10,3
+ mtctr 8
+ bf 31,4f
+ ld 6,0(12)
+ addi 11,12,8
+ std 6,0(3)
+ addi 10,3,8
+
+ /* Main aligned copy loop. Copies 32-bytes at a time. */
+ .align 4
+4:
+ ld 6,0(11)
+ ld 7,8(11)
+ ld 8,16(11)
+ ld 0,24(11)
+ addi 11,11,32
+
+ std 6,0(10)
+ std 7,8(10)
+ std 8,16(10)
+ std 0,24(10)
+ addi 10,10,32
+ bdnz 4b
+3:
+
+ /* Check for tail bytes. */
+ rldicr 0,31,0,60
+ mtcrf 0x01,31
+ beq cr6,0f
+
+.L9:
+ add 3,3,0
+ add 12,12,0
+
+ /* At this point we have a tail of 0-7 bytes and we know that the
+ destination is doubleword-aligned. */
+4: /* Copy 4 bytes. */
+ bf 29,2f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+2: /* Copy 2 bytes. */
+ bf 30,1f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+1: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,0(12)
+ stb 6,0(3)
+0: /* Return original DST pointer. */
+ ld 31,-8(1)
+ ld 3,-16(1)
+ blr
+
+ /* Handle copies of 0~31 bytes. */
+ .align 4
+L(copy_LT_32):
+ cmpldi cr6,5,8
+ mr 12,4
+ mtcrf 0x01,5
+ ble cr6,L(copy_LE_8)
+
+ /* At least 9 bytes to go. */
+ neg 8,4
+ clrrdi 11,4,2
+ andi. 0,8,3
+ cmpldi cr1,5,16
+ mr 10,5
+ beq L(copy_LT_32_aligned)
+
+ /* Force 4-bytes alignment for SRC. */
+ mtocrf 0x01,0
+ subf 10,0,5
+2: bf 30,1f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+1: bf 31,L(end_4bytes_alignment)
+
+ lbz 6,0(12)
+ addi 12,12,1
+ stb 6,0(3)
+ addi 3,3,1
+
+ .align 4
+L(end_4bytes_alignment):
+ cmpldi cr1,10,16
+ mtcrf 0x01,10
+
+L(copy_LT_32_aligned):
+ /* At least 6 bytes to go, and SRC is word-aligned. */
+ blt cr1,8f
+
+ /* Copy 16 bytes. */
+ lwz 6,0(12)
+ lwz 7,4(12)
+ stw 6,0(3)
+ lwz 8,8(12)
+ stw 7,4(3)
+ lwz 6,12(12)
+ addi 12,12,16
+ stw 8,8(3)
+ stw 6,12(3)
+ addi 3,3,16
+8: /* Copy 8 bytes. */
+ bf 28,4f
+
+ lwz 6,0(12)
+ lwz 7,4(12)
+ addi 12,12,8
+ stw 6,0(3)
+ stw 7,4(3)
+ addi 3,3,8
+4: /* Copy 4 bytes. */
+ bf 29,2f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+2: /* Copy 2-3 bytes. */
+ bf 30,1f
+
+ lhz 6,0(12)
+ sth 6,0(3)
+ bf 31,0f
+ lbz 7,2(12)
+ stb 7,2(3)
+ ld 3,-16(1)
+ blr
+
+ .align 4
+1: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,0(12)
+ stb 6,0(3)
+0: /* Return original DST pointer. */
+ ld 3,-16(1)
+ blr
+
+ /* Handles copies of 0~8 bytes. */
+ .align 4
+L(copy_LE_8):
+ bne cr6,4f
+
+ /* Though we could've used ld/std here, they are still
+ slow for unaligned cases. */
+
+ lwz 6,0(4)
+ lwz 7,4(4)
+ stw 6,0(3)
+ stw 7,4(3)
+ ld 3,-16(1) /* Return original DST pointers. */
+ blr
+
+ .align 4
+4: /* Copies 4~7 bytes. */
+ bf 29,2b
+
+ lwz 6,0(4)
+ stw 6,0(3)
+ bf 30,5f
+ lhz 7,4(4)
+ sth 7,4(3)
+ bf 31,0f
+ lbz 8,6(4)
+ stb 8,6(3)
+ ld 3,-16(1)
+ blr
+
+ .align 4
+5: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,4(4)
+ stb 6,4(3)
+
+0: /* Return original DST pointer. */
+ ld 3,-16(1)
+ blr
+
+ /* Handle copies of 32+ bytes where DST is aligned (to quadword) but
+ SRC is not. Use aligned quadword loads from SRC, shifted to realign
+ the data, allowing for aligned DST stores. */
+ .align 4
+L(copy_GE_32_unaligned):
+ clrldi 0,0,60 /* Number of bytes until the 1st
+ quadword. */
+ andi. 11,3,15 /* Check alignment of DST (against
+ quadwords). */
+ srdi 9,5,4 /* Number of full quadwords remaining. */
+
+ beq L(copy_GE_32_unaligned_cont)
+
+ /* SRC is not quadword aligned, get it aligned. */
+
+ mtcrf 0x01,0
+ subf 31,0,5
+
+ /* Vector instructions work best when proper alignment (16-bytes)
+ is present. Move 0~15 bytes as needed to get DST quadword-aligned. */
+1: /* Copy 1 byte. */
+ bf 31,2f
+
+ lbz 6,0(12)
+ addi 12,12,1
+ stb 6,0(3)
+ addi 3,3,1
+2: /* Copy 2 bytes. */
+ bf 30,4f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+4: /* Copy 4 bytes. */
+ bf 29,8f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+8: /* Copy 8 bytes. */
+ bf 28,0f
+
+ ld 6,0(12)
+ addi 12,12,8
+ std 6,0(3)
+ addi 3,3,8
+0:
+ clrldi 10,12,60 /* Check alignment of SRC. */
+ srdi 9,31,4 /* Number of full quadwords remaining. */
+
+ /* The proper alignment is present, it is OK to copy the bytes now. */
+L(copy_GE_32_unaligned_cont):
+
+ /* Setup two indexes to speed up the indexed vector operations. */
+ clrldi 11,31,60
+ li 6,16 /* Index for 16-bytes offsets. */
+ li 7,32 /* Index for 32-bytes offsets. */
+ cmpldi cr1,11,0
+ srdi 8,31,5 /* Setup the loop counter. */
+ mr 10,3
+ mr 11,12
+ mtcrf 0x01,9
+ cmpldi cr6,9,1
+ lvsl 5,0,12
+ lvx 3,0,12
+ bf 31,L(setup_unaligned_loop)
+
+ /* Copy another 16 bytes to align to 32-bytes due to the loop . */
+ lvx 4,12,6
+ vperm 6,3,4,5
+ addi 11,12,16
+ addi 10,3,16
+ stvx 6,0,3
+ vor 3,4,4
+
+L(setup_unaligned_loop):
+ mtctr 8
+ ble cr6,L(end_unaligned_loop)
+
+ /* Copy 32 bytes at a time using vector instructions. */
+ .align 4
+L(unaligned_loop):
+
+ /* Note: vr6/vr10 may contain data that was already copied,
+ but in order to get proper alignment, we may have to copy
+ some portions again. This is faster than having unaligned
+ vector instructions though. */
+
+ lvx 4,11,6 /* vr4 = r11+16. */
+ vperm 6,3,4,5 /* Merge the correctly-aligned portions
+ of vr3/vr4 into vr6. */
+ lvx 3,11,7 /* vr3 = r11+32. */
+ vperm 10,4,3,5 /* Merge the correctly-aligned portions
+ of vr3/vr4 into vr10. */
+ addi 11,11,32
+ stvx 6,0,10
+ stvx 10,10,6
+ addi 10,10,32
+
+ bdnz L(unaligned_loop)
+
+ .align 4
+L(end_unaligned_loop):
+
+ /* Check for tail bytes. */
+ rldicr 0,31,0,59
+ mtcrf 0x01,31
+ beq cr1,0f
+
+ add 3,3,0
+ add 12,12,0
+
+ /* We have 1~15 tail bytes to copy, and DST is quadword aligned. */
+8: /* Copy 8 bytes. */
+ bf 28,4f
+
+ lwz 6,0(12)
+ lwz 7,4(12)
+ addi 12,12,8
+ stw 6,0(3)
+ stw 7,4(3)
+ addi 3,3,8
+4: /* Copy 4 bytes. */
+ bf 29,2f
+
+ lwz 6,0(12)
+ addi 12,12,4
+ stw 6,0(3)
+ addi 3,3,4
+2: /* Copy 2~3 bytes. */
+ bf 30,1f
+
+ lhz 6,0(12)
+ addi 12,12,2
+ sth 6,0(3)
+ addi 3,3,2
+1: /* Copy 1 byte. */
+ bf 31,0f
+
+ lbz 6,0(12)
+ stb 6,0(3)
+0: /* Return original DST pointer. */
+ ld 31,-8(1)
+ ld 3,-16(1)
+ blr
+
+END_GEN_TB (BP_SYM (memcpy),TB_TOCLESS)
+libc_hidden_builtin_def (memcpy)
git://sourceware.org / glibc.git / commitdiff