Support for SIMD operations for RGG1555

Description

Up to 3x the performance for RGG1555 with SIMD operations. The current implementation is hardcoded for 16 bytes at a time (128 bits). Still requires some testing and validation for AVX2 and AVX512.

Fixes #45 (closed)

Cargo.toml

@@ -15,8 +15,10 @@ readme = "README.md"
 crate-type = ["cdylib", "rlib"]
 
 [features]
+default = []
 wasm = ["wasm-bindgen", "js-sys"]
 python = ["pyo3"]
+simd = []
 debug = []
 pedantic = []
 cpulog = []
@@ -27,6 +29,9 @@ wasm-bindgen = { version = "0.2", optional = true }
 js-sys = { version = "0.3", optional = true }
 pyo3 = { version = "0.20", optional = true }
 
+[dev-dependencies]
+criterion = "0.5"
+
 [build-dependencies]
 chrono = "0.4"
 regex = "1"
@@ -44,8 +49,18 @@ debug = false
 lto = true
 opt-level = 3
 
+[profile.bench]
+debug = false
+lto = true
+opt-level = 3
+codegen-units = 1
+
 [workspace]
 members = [".", "frontends/libretro", "frontends/sdl"]
 
 [package.metadata.docs.rs]
 features = ["wasm", "gen-mock"]
+
+[[bench]]
+name = "color"
+harness = false