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nv50: Extract needed value bits without shifting them before calling bitcount

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This can save one instruction since bitcount doesn't care about specific
bits' positions.

Reviewed-by: Karol Herbst <kherbst@redhat.com>
This commit is contained in:
Vlad Golovkin 2018-04-16 23:50:24 +03:00 • committed by Karol Herbst
parent 3a1df14a7b
commit 967aabca06
1 changed files with 1 additions and 1 deletions
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2
src/gallium/drivers/nouveau/nv50/nv50_screen.c
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@ -992,7 +992,7 @@ nv50_screen_create(struct nouveau_device *dev)
nouveau_getparam(dev, NOUVEAU_GETPARAM_GRAPH_UNITS, &value);
screen->TPs = util_bitcount(value & 0xffff);
screen->MPsInTP = util_bitcount((value >> 24) & 0xf);
screen->MPsInTP = util_bitcount(value & 0x0f000000);
screen->mp_count = screen->TPs * screen->MPsInTP;