From 283d4d18e598793bbff7d9ba5a601bced9b36542 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 4 Nov 2016 13:41:20 -0700 Subject: [PATCH] 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: --- src/gallium/drivers/vc4/vc4_program.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index f4be5f4..33cd135 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); -- 2.7.4