Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

[PowerPC64] Port optimized strcpy to PPC64LE

Submitted by: Bruno Larsen <bruno.larsen@eldorado.org.br>
Reviewed by: luporl, bdragon (IRC)
MFC after: 1 week
Sponsore

[PowerPC64] Port optimized strcpy to PPC64LE

Submitted by: Bruno Larsen <bruno.larsen@eldorado.org.br>
Reviewed by: luporl, bdragon (IRC)
MFC after: 1 week
Sponsored by: Eldorado Research Institute (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D29067

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[PowerPC64LE] Use a shared LIBC_ARCH for powerpc64le.

Given that we have converted to ELFv2 for BE already, endianness is the only
difference between the two ARCHs.

As such, there is no need to dif

[PowerPC64LE] Use a shared LIBC_ARCH for powerpc64le.

Given that we have converted to ELFv2 for BE already, endianness is the only
difference between the two ARCHs.

As such, there is no need to differentiate LIBC_ARCH between the two.

Combining them like this lets us avoid needing to have two copies of several
bits for no good reason.

Sponsored by: Tag1 Consulting, Inc.

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[PPC64] memcpy/memmove/bcopy optimization

For copies shorter than 512 bytes, the data is copied using plain
ld/std instructions.
For 512 bytes or more, the copy is done in 3 phases:

Phase 1: copy f

[PPC64] memcpy/memmove/bcopy optimization

For copies shorter than 512 bytes, the data is copied using plain
ld/std instructions.
For 512 bytes or more, the copy is done in 3 phases:

Phase 1: copy from the src buffer until it's aligned at a 16-byte boundary
Phase 2: copy as many aligned 64-byte blocks from the src buffer as possible
Phase 3: copy the remaining data, if any

In phase 2, this code uses VSX instructions when available. Otherwise,
it uses ldx/stdx.

Submitted by: Luis Pires <lffpires_ruabrasil.org> (original version)
Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D15118

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[PPC64] strncpy optimization

Assembly optimization of strncpy for PowerPC64, using double words
instead of bytes to copy strings.

Submitted by: Leonardo Bianconi <leonardo.bianconi_eldorado.org.br>

[PPC64] strncpy optimization

Assembly optimization of strncpy for PowerPC64, using double words
instead of bytes to copy strings.

Submitted by: Leonardo Bianconi <leonardo.bianconi_eldorado.org.br> (original version)
Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D15369

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[PPC64] strcpy optimization

Assembly optimization of strcpy for PowerPC64, using double words
instead of bytes to copy strings.

Submitted by: Leonardo Bianconi <leonardo.bianconi_eldorado.org.br> (

[PPC64] strcpy optimization

Assembly optimization of strcpy for PowerPC64, using double words
instead of bytes to copy strings.

Submitted by: Leonardo Bianconi <leonardo.bianconi_eldorado.org.br> (original version)
Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D15368

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powerpc64: Rewrite strcmp in asm to take advantage of word size

Summary:
Optimize strcmp for powerpc64.
Data is loaded by double words and cmpb intruction is used to find '\0'.

Some performance gai

powerpc64: Rewrite strcmp in asm to take advantage of word size

Summary:
Optimize strcmp for powerpc64.
Data is loaded by double words and cmpb intruction is used to find '\0'.

Some performance gain rates between the current and the optimized solution:

String size (bytes) Gain rate
<=8 0.59%
<=16 1.92%
32 3.02%
64 5.60%
128 10.16%
256 18.05%
512 30.18%
1024 42.82%

Submitted by: alexandre.yamashita_eldorado.org.br,
leonardo.bianconi_eldorado.org.br
Differential Revision: https://reviews.freebsd.org/D15220

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