--- /dev/null
+/*
+ * Copyright (C) 2019 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/**
+ * @file
+ *
+ * Clamps writes to VARYING_SLOT_PSIZ to a given limit.
+ */
+
+#include "compiler/nir/nir.h"
+#include "compiler/nir/nir_builder.h"
+
+void
+nir_clamp_psiz(nir_shader *shader, float min_size, float max_size);
+
+void
+nir_clamp_psiz(nir_shader *shader, float min_size, float max_size)
+{
+ nir_foreach_function(func, shader) {
+ nir_foreach_block(block, func->impl) {
+ nir_foreach_instr_safe(instr, block) {
+ if (instr->type != nir_instr_type_intrinsic)
+ continue;
+
+ nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
+ if (intr->intrinsic != nir_intrinsic_store_deref)
+ continue;
+
+ nir_variable *var = nir_intrinsic_get_var(intr, 0);
+ if (var->data.location != VARYING_SLOT_PSIZ)
+ continue;
+
+ nir_builder b;
+ nir_builder_init(&b, func->impl);
+ b.cursor = nir_before_instr(instr);
+
+ nir_ssa_def *in_size = nir_ssa_for_src(&b, intr->src[1], 1);
+
+ nir_ssa_def *clamped =
+ nir_fmin(&b,
+ nir_fmax(&b, in_size, nir_imm_float(&b, min_size)),
+ nir_imm_float(&b, max_size));
+
+ nir_instr_rewrite_src(instr, &intr->src[1],
+ nir_src_for_ssa(clamped));
+
+ }
+ }
+
+ nir_metadata_preserve(func->impl, nir_metadata_block_index |
+ nir_metadata_dominance);
+ }
+}
+
projects / mesa.git / commitdiff