From: Eric Anholt Date: Fri, 4 Nov 2016 20:41:20 +0000 (-0700) Subject: vc4: Use Newton-Raphson on the 1/W write to fix glmark2 terrain. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=283d4d18e598793bbff7d9ba5a601bced9b36542;p=mesa.git vc4: Use Newton-Raphson on the 1/W write to fix glmark2 terrain. The 1/W was apparently not accurate enough, and we were getting sparklies in the distance. The closed driver also did a N-R step here. Cc: --- diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index f4be5f43c8c..33cd1355b99 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -1421,7 +1421,7 @@ emit_vert_end(struct vc4_compile *c, struct vc4_varying_slot *fs_inputs, uint32_t num_fs_inputs) { - struct qreg rcp_w = qir_RCP(c, c->outputs[c->output_position_index + 3]); + struct qreg rcp_w = ntq_rcp(c, c->outputs[c->output_position_index + 3]); emit_stub_vpm_read(c);