panfrost/midgard: Add perspective division opcodes

[mesa.git] / src / gallium / drivers / panfrost / midgard / midgard.h

diff --git a/src/gallium/drivers/panfrost/midgard/midgard.h b/src/gallium/drivers/panfrost/midgard/midgard.h
index 68e969ccf9c8265337925b60faf0c7b62a71c096..980a968cbe9cdbf483debd8839eb3e7ee3aebb8f 100644 (file)
--- a/src/gallium/drivers/panfrost/midgard/midgard.h
+++ b/src/gallium/drivers/panfrost/midgard/midgard.h
@@ -371,6 +371,13 @@ typedef enum {
         /* Used in OpenCL. Probably can ld other things as well */
         midgard_op_ld_global_id = 0x10,
 
+        /* The L/S unit can do perspective division a clock faster than the ALU
+         * if you're lucky. Put the vec4 in r27, and call with 0x24 as the
+         * unknown state; the output will be <x/w, y/w, z/w, 1>. Replace w with
+         * z for the z version */
+        midgard_op_ldst_perspective_division_z = 0x12,
+        midgard_op_ldst_perspective_division_w = 0x13,
+
         /* val in r27.y, address embedded, outputs result to argument. Invert val for sub. Let val = +-1 for inc/dec. */
         midgard_op_atomic_add = 0x40,
         midgard_op_atomic_and = 0x44,