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f32 "%" is broken on MSVC #27859

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eefriedman opened this issue Aug 16, 2015 · 2 comments
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f32 "%" is broken on MSVC #27859

eefriedman opened this issue Aug 16, 2015 · 2 comments

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@eefriedman
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fn main() {
  println!("{}", 1.5f32 % std::env::args().len() as f32);
}

This code doesn't link on MSVC targets. (Sorry if I messed up the testcase; I don't have a Rust install on Windows to test with.)
@eefriedman eefriedman mentioned this issue Aug 16, 2015
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@Diggsey
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Diggsey commented Aug 16, 2015

Isn't this supposed to be removed anyway? #27824
Does calling fmod directly work?

@steveklabnik
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/cc @rust-lang/lang

@alexcrichton alexcrichton mentioned this issue Aug 18, 2015
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alexcrichton added a commit to alexcrichton/rust that referenced this issue Aug 18, 2015
@alexcrichton
trans: Call fmod manually for 32-bit float rem
8a7b0fa 
Currently `f32 % f32` will generate a link error on 32-bit MSVC because LLVM
will lower the operation to a call to the nonexistent function `fmodf`. Work
around in this in the backend by lowering to a call to `fmod` instead with
necessary extension/truncation between floats/doubles.

Closes rust-lang#27859
bors added a commit that referenced this issue Aug 19, 2015
@bors
Auto merge of #27875 - alexcrichton:msvc-f32-rem, r=nrc
c8c14f2 
Currently `f32 % f32` will generate a link error on 32-bit MSVC because LLVM
will lower the operation to a call to the nonexistent function `fmodf`. Work
around in this in the backend by lowering to a call to `fmod` instead with
necessary extension/truncation between floats/doubles.

Closes #27859
@malbarbo malbarbo mentioned this issue Jun 13, 2017
Closed
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3 participants
@steveklabnik @Diggsey @eefriedman