pan/bi: Document when dual-tex is triggered

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4671>
2020-04-21 12:19:09 -04:00
parent 6fe41a12e3
commit a2c735350f
1 changed files with 5 additions and 1 deletions
@@ -1415,7 +1415,11 @@ static void dump_add(FILE *fp, uint64_t word, struct bifrost_regs regs,
                        struct bifrost_tex_ctrl ctrl;
                        memcpy((char *) &ctrl, (char *) &controlBits, sizeof(ctrl));

-                        // TODO: figure out what actually triggers dual-tex
+                        /* Dual-tex triggered for adjacent texturing
+                         * instructions with the same coordinates to different
+                         * textures/samplers. Observed for the compact
+                         * (2D/normal) case. */
+
                        if (ctrl.result_type == 9) {
                                struct bifrost_dual_tex_ctrl dualCtrl;
                                memcpy((char *) &dualCtrl, (char *) &controlBits, sizeof(ctrl));