summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/llvmpipe/lp_bld_flow.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_flow.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_bld_flow.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_flow.c b/src/gallium/drivers/llvmpipe/lp_bld_flow.c
new file mode 100644
index 0000000000..5fc85a19b8
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_bld_flow.c
@@ -0,0 +1,86 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+/**
+ * LLVM control flow build helpers.
+ *
+ * @author Jose Fonseca <jfonseca@vmware.com>
+ */
+
+#include "lp_bld_flow.h"
+
+
+
+void
+lp_build_loop_begin(LLVMBuilderRef builder,
+ LLVMValueRef start,
+ struct lp_build_loop_state *state)
+{
+ LLVMBasicBlockRef block = LLVMGetInsertBlock(builder);
+ LLVMValueRef function = LLVMGetBasicBlockParent(block);
+
+ state->block = LLVMAppendBasicBlock(function, "loop");
+
+ LLVMBuildBr(builder, state->block);
+
+ LLVMPositionBuilderAtEnd(builder, state->block);
+
+ state->counter = LLVMBuildPhi(builder, LLVMTypeOf(start), "");
+
+ LLVMAddIncoming(state->counter, &start, &block, 1);
+
+}
+
+
+void
+lp_build_loop_end(LLVMBuilderRef builder,
+ LLVMValueRef end,
+ LLVMValueRef step,
+ struct lp_build_loop_state *state)
+{
+ LLVMBasicBlockRef block = LLVMGetInsertBlock(builder);
+ LLVMValueRef function = LLVMGetBasicBlockParent(block);
+ LLVMValueRef next;
+ LLVMValueRef cond;
+ LLVMBasicBlockRef after_block;
+
+ if (!step)
+ step = LLVMConstInt(LLVMTypeOf(end), 1, 0);
+
+ next = LLVMBuildAdd(builder, state->counter, step, "");
+
+ cond = LLVMBuildICmp(builder, LLVMIntNE, next, end, "");
+
+ after_block = LLVMAppendBasicBlock(function, "");
+
+ LLVMBuildCondBr(builder, cond, after_block, state->block);
+
+ LLVMAddIncoming(state->counter, &next, &block, 1);
+
+ LLVMPositionBuilderAtEnd(builder, after_block);
+}
+