Use _mm_and_si128 and _mm_cmpeq_epi16 rather than expensive multiplication _mm_mullo_epi16 with _mm_srai_epi16 that compiler may not be able to optimize.
Use a simple shift for the rotation.
* c/blake3_sse2_x86-64_unix.S: emulate pshufb using SSE2 instructions for x86_64 unix
* c/blake3_sse2_x86-64_windows_gnu.S: Likewise for x86_64 Windows GNU.
* c/blake3_sse2_x86-64_windows_msvc.asm: Likewise for x86_64 Windows MSVC.
Use two 16-bit shuffles: one for the low 64-bits and one for the high 64-bits.
* c/blake3_sse2_x86-64_unix.S: emulate pshufb using SSE2 instructions for x86_64 unix
* c/blake3_sse2_x86-64_windows_gnu.S: Likewise for x86_64 Windows GNU.
* c/blake3_sse2_x86-64_windows_msvc.asm: Likewise for x86_64 Windows MSVC.
Use two pinsrw and a 16-bit shift to insert the 32-bit integer at the desired location.
* c/blake3_sse2_x86-64_unix.S: emulate pinsrd using SSE2 instructions for x86_64 unix
* c/blake3_sse2_x86-64_windows_gnu.S: Likewise for x86_64 Windows GNU.
* c/blake3_sse2_x86-64_windows_msvc.asm: Likewise for x86_64 Windows MSVC.
Blend according to (mask & b) | ((~mask) & a).
* c/blake3_sse2_x86-64_unix.S: emulate blendvps using SSE2 instructions for x86_64 unix
* c/blake3_sse2_x86-64_windows_gnu.S: Likewise for x86_64 Windows GNU.
* c/blake3_sse2_x86-64_windows_msvc.asm: Likewise for x86_64 Windows MSVC.
Use a constant mask to blend according to (mask & b) | ((~mask) & a).
* c/blake3_sse2_x86-64_unix.S: emulate pblendw using SSE2 instructions for x86_64 unix
* c/blake3_sse2_x86-64_windows_gnu.S: Likewise for x86_64 Windows GNU.
* c/blake3_sse2_x86-64_windows_msvc.asm: Likewise for x86_64 Windows MSVC.
Use a constant mask to blend according to (mask & b) | ((~mask) & a).
* src/rust_sse2.rs: emulate _mm_blend_epi16 using SSE2 intrinsics
* c/blake3_sse2.c: Likewise.
Wire up basic functions and features for SSE2 support using the SSE4.1 version
as a basis without implementing the SSE2 instructions yet.
* Cargo.toml: add no_sse2 feature
* benches/bench.rs: wire SSE2 benchmarks
* build.rs: add SSE2 rust intrinsics and assembly builds
* c/Makefile.testing: add SSE2 C and assembly targets
* c/README.md: add SSE2 to C build instructions
* c/blake3_c_rust_bindings/build.rs: add SSE2 C rust binding builds
* c/blake3_c_rust_bindings/src/lib.rs: add SSE2 C rust bindings
* c/blake3_dispatch.c: add SSE2 C dispatch
* c/blake3_impl.h: add SSE2 C function prototypes
* c/blake3_sse2.c: add SSE2 C intrinsic file starting with SSE4.1 version
* c/blake3_sse2_x86-64_{unix.S,windows_gnu.S,windows_msvc.asm}: add SSE2
assembly files starting with SSE4.1 version
* src/ffi_sse2.rs: add rust implementation using SSE2 C rust bindings
* src/lib.rs: add SSE2 rust intrinsics and SSE2 C rust binding rust SSE2 module
configurations
* src/platform.rs: add SSE2 rust platform detection and dispatch
* src/rust_sse2.rs: add SSE2 rust intrinsic file starting with SSE4.1 version
* tools/instruction_set_support/src/main.rs: add SSE2 feature detection
The default executable stack setting on Linux can be fixed in two different ways:
- By adding the `.section .note.GNU-stack,"",%progbits` special incantation
- By passing the `--noexecstack` flag to the assembler
This patch implements both, but only one of them is strictly necessary.
I've also added some additional hardening flags to the Makefile. May not be portable.
Changes since 0.3.4:
- The `digest` dependency is now v0.9 and the `crypto-mac` dependency is
now v0.8.
- Intel CET is supported in the assembly implementations.
- `b3sum` error output includes filepaths again.
It looks like I originally made this mistake when I was copying code
from the baokeshed prototype (a274a9b0fa),
and then it got replicated into the C implementation later.
Changes since 0.3.3:
- `b3sum` now supports the `--check` flag. This is intended to be a
drop-in replacement for e.g. `md5sum --check` from Coreutils. The
behavior is somewhat stricter than Coreutils with respect to invalid
Unicode in filenames. For a complete description of how `--check`
works, see the file `b3sum/what_does_check_do.md`.
- To support the `--check` feature, backslashes and newlines that appear
in filenames are now escaped in the output of `b3sum`. This is done
the same way as in Coreutils.
- To support `--check` interoperability between Unix and Windows,
backslashes in filepaths on Windows are now replaced with forward
slashes in the output of `b3sum`. Note that this is different from
Coreutils.
Matthew Krupcale
Samuel Neves
Jack O'Connor
Jack O'Connor
Alexx Roche
Samuel Neves
Justus K