From e1f2c84282bbcce9d7e94ac99d2ff1b3489f6e67 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Mathias=20Fr=C3=B6hlich?= Date: Sat, 20 Apr 2019 07:57:12 +0200 Subject: [PATCH] i965: Use 32 bit u_bit_scan for vertex attribute setup. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The vertex array object contains 32 vertex arrays. By that we cannot reference more then these in the vertex shader inputs. So, we can use the 32 bits u_bit_scan function to iterate the vertex shader inputs and place an assert that only these are present. Also place an other assert that the vertex array setup in i965 does not overrun the enabled array in brw_context::vs::enabled. v2: Style fixes. Reviewed-by: Matt Turner Signed-off-by: Mathias Fröhlich Part-of: --- src/mesa/drivers/dri/i965/brw_draw_upload.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c index 5e26433..3f4d9a9 100644 --- a/src/mesa/drivers/dri/i965/brw_draw_upload.c +++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c @@ -461,9 +461,11 @@ brw_prepare_vertices(struct brw_context *brw) /* BRW_NEW_VS_PROG_DATA */ const struct brw_vs_prog_data *vs_prog_data = brw_vs_prog_data(brw->vs.base.prog_data); - GLbitfield64 vs_inputs = + const uint64_t vs_inputs64 = nir_get_single_slot_attribs_mask(vs_prog_data->inputs_read, vp->DualSlotInputs); + assert((vs_inputs64 & ~(uint64_t)VERT_BIT_ALL) == 0); + unsigned vs_inputs = (unsigned)vs_inputs64; const unsigned char *ptr = NULL; GLuint interleaved = 0; unsigned int min_index = brw->vb.min_index + brw->basevertex; @@ -491,15 +493,15 @@ brw_prepare_vertices(struct brw_context *brw) /* Accumulate the list of enabled arrays. */ brw->vb.nr_enabled = 0; - while (vs_inputs) { - const unsigned index = ffsll(vs_inputs) - 1; - assert(index < 64); - struct brw_vertex_element *input = &brw->vb.inputs[index]; - input->is_dual_slot = (vp->DualSlotInputs & BITFIELD64_BIT(index)) != 0; - vs_inputs &= ~BITFIELD64_BIT(index); + unsigned mask = vs_inputs; + while (mask) { + const gl_vert_attrib attr = u_bit_scan(&mask); + struct brw_vertex_element *input = &brw->vb.inputs[attr]; + input->is_dual_slot = (vp->DualSlotInputs & BITFIELD64_BIT(attr)) != 0; brw->vb.enabled[brw->vb.nr_enabled++] = input; } + assert(brw->vb.nr_enabled <= VERT_ATTRIB_MAX); if (brw->vb.nr_enabled == 0) return; -- 2.7.4