SIMD spectralnorm #77
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TeXitoi
reviewed
Sep 11, 2018
| @@ -1,6 +1,6 @@ | |||
| SOURCES = $(wildcard src/*.rs) | |||
| RUSTC ?= rustc | |||
| RUSTC_FLAGS ?= -C opt-level=3 -C target-cpu=core2 -C lto | |||
| RUSTC_FLAGS ?= -C panic=abort -C opt-level=3 -C target-cpu=core2 -C lto | |||
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TeXitoi
reviewed
Sep 11, 2018
| } | ||
| fn a(i: [usize; 2], j: [usize; 2]) -> F64x2 { | ||
| F64x2::new(((i[0] + j[0]) * (i[0] + j[0] + 1) / 2 + i[0] + 1) as f64, | ||
| ((i[1] + j[1]) * (i[1] + j[1] + 1) / 2 + i[1] + 1) as f64) |
TeXitoi
approved these changes
Sep 11, 2018
|
Ah, I completely overlooked this. |
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This replaces the autovectorized code with explicit SIMD instructions and inlines the former
div_and_addfunction. On my machine, the difference is negligible, but I suspect that skylake has better branch prediction than the old Core 2, so here goes nothing...