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29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
From a2062b2ec252bb8be9337a6d5b384c8cdda4463d Mon Sep 17 00:00:00 2001
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From: Michael Hudson-Doyle <michael.hudson@canonical.com>
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Date: Wed, 13 Mar 2019 15:55:30 +1300
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Subject: [PATCH] round result of (highest as f64).log(2.0)
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Even though (1024f64).log(2.0) has an exact, representable, value, with
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rustc 1.32 on i386 it comes out as +9.999999999999999985 with
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optimization enabled. And the rustc doesn't like having two defintions
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for U1024 etc.
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---
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vendor/typenum/build/main.rs | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git rustc-1.36.0-src/vendor/typenum/build/main.rs rustc-1.36.0-src/vendor/typenum/build/main.rs
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index 9c9f237cd..153031a2f 100644
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--- rustc-1.36.0-src/vendor/typenum/build/main.rs
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+++ rustc-1.36.0-src/vendor/typenum/build/main.rs
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@@ -77,7 +77,7 @@ pub fn no_std() {}
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fn main() {
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let highest: u64 = 1024;
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- let first2: u32 = (highest as f64).log(2.0) as u32 + 1;
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+ let first2: u32 = (highest as f64).log(2.0).round() as u32 + 1;
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let first10: u32 = (highest as f64).log(10.0) as u32 + 1;
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let uints = (0..(highest + 1))
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.chain((first2..64).map(|i| 2u64.pow(i)))
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--
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2.22.0
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