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_hardware_pause() is undefined on most platforms #1

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mheily opened this issue Mar 7, 2014 · 1 comment

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mheily commented Mar 7, 2014

In src/private.h, _hardware_pause() is undefined on most platforms. Need to research what assembly is appropriate for use in a busy-wait spin loop.

mheily added a commit that referenced this issue


          workaround for github bug #1

e1acfe2

joshring commented Mar 14, 2017 •

edited

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Sorry for previous mistake, see NOP:
https://lists.gnu.org/archive/html/discuss-gnuradio/2013-07/msg00437.html
http://www.avrfreaks.net/forum/problems-delaying-nops-avr-gcc
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0489e/Cjafcggi.html

Volatile apparently forces it to be executed and not removed by either the optimiser or the CPU.

__asm__ __volatile__ ("nop");

mheily closed this as completed

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