v3d: Emit a simpler negate for the iabs implementation.

One program affected in my shader-db. instructions in affected programs: 110 -> 108 (-1.82%)
2019-02-18 18:13:09 -08:00
parent 1a775d43c9
commit 0bba9c8489
1 changed files with 1 additions and 2 deletions
@@ -1027,8 +1027,7 @@ ntq_emit_alu(struct v3d_compile *c, nir_alu_instr *instr)
        }

        case nir_op_iabs:
-                result = vir_MAX(c, src[0],
-                                vir_SUB(c, vir_uniform_ui(c, 0), src[0]));
+                result = vir_MAX(c, src[0], vir_NEG(c, src[0]));
                break;

        case nir_op_fddx: