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I found something strange.

I wrote simple script that print the variable in Lua 5.1. It worked on x86 on linux. I tried to run it on my target device that is MIPS little endian. I prepared the lua by buildroot. I used 'hard-float' option for performance issue. But this simple script doesn't work. I used Sourcery CodeBench.

I tested it with 'soft-float' option. Then lua worked correctly. Have you the experience like that?

The code is like below. 

local var = 131523;
print(var);

It must print 131523. But my target printed 0 . What's wrong?

Jinho Yoo
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  • This is the weirdest thing. I compiled Lua 5.2.3 with a completely different environment (clang/LLVM based ELLCC) and got similar results. ARM, i386, PowerPC, and x86_64 worked, mipshf failed, mipsf worked. Strange. – Richard Pennington Jan 27 '15 at 11:56
  • Interesting report. Could you make it a proper bug report at https://bugs.busybox.net/, in the "Buildroot" product, so that we can investigate that? – Thomas Petazzoni Jan 27 '15 at 12:54
  • Have you confirmed that hard-float is enabled and working properly on your target? – markgz Jan 27 '15 at 22:43
  • OK, I'll report it into busybox's bug tracker . Its URL is https://bugs.busybox.net/show_bug.cgi?id=7844. @markgz, I compiled other libraries and source code with hard-float option and it doesn't make any problem. – Jinho Yoo Jan 29 '15 at 00:01

1 Answers1

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I found that target CPU we used doesn't support floating point calculation.

Jinho Yoo
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