[FFmpeg-devel] [PATCH] avutil: runtime cpu detection for mips

Michael Niedermayer michaelni at gmx.at
Wed Sep 30 16:08:50 CEST 2015

On Wed, Sep 30, 2015 at 07:03:46PM +0530, shivraj.patil at imgtec.com wrote:
> From: Shivraj Patil <shivraj.patil at imgtec.com>

> +static int get_cpuinfo(uint32_t *hwcap)
> +{
> +    FILE *f = fopen("/proc/cpuinfo", "r");

under qemu i get this:

cpu_flags(raw) = 0x00000000
cpu_flags_str(raw) =
cpu_flags(effective) = 0x00000000
cpu_flags_str(effective) =
threads = 1 (cpu_count = 12)

IIUC this disables all cpu extensions
is that intended ?
(we currently only have loongson hardware to test so this would mean
 an end to testing imgtec specific mips optimizations)

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Avoid a single point of failure, be that a person or equipment.
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