1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
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8 * "Software"), to deal in the Software without restriction, including
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11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
31 * Helpers for emiting intrinsic calls.
33 * LLVM vanilla IR doesn't represent all basic arithmetic operations we care
34 * about, and it is often necessary to resort target-specific intrinsics for
35 * performance, convenience.
37 * Ideally we would like to stay away from target specific intrinsics and
38 * move all the instruction selection logic into upstream LLVM where it belongs.
40 * These functions are also used for calling C functions provided by us from
41 * generated LLVM code.
43 * @author Jose Fonseca <jfonseca@vmware.com>
47 #include "util/u_debug.h"
49 #include "lp_bld_const.h"
50 #include "lp_bld_intr.h"
54 lp_declare_intrinsic(LLVMModuleRef module
,
57 LLVMTypeRef
*arg_types
,
60 LLVMTypeRef function_type
;
61 LLVMValueRef function
;
63 assert(!LLVMGetNamedFunction(module
, name
));
65 function_type
= LLVMFunctionType(ret_type
, arg_types
, num_args
, 0);
66 function
= LLVMAddFunction(module
, name
, function_type
);
68 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
69 LLVMSetLinkage(function
, LLVMExternalLinkage
);
71 assert(LLVMIsDeclaration(function
));
78 lp_build_intrinsic(LLVMBuilderRef builder
,
84 LLVMModuleRef module
= LLVMGetGlobalParent(LLVMGetBasicBlockParent(LLVMGetInsertBlock(builder
)));
85 LLVMValueRef function
;
87 function
= LLVMGetNamedFunction(module
, name
);
89 LLVMTypeRef arg_types
[LP_MAX_FUNC_ARGS
];
92 assert(num_args
<= LP_MAX_FUNC_ARGS
);
94 for(i
= 0; i
< num_args
; ++i
) {
96 arg_types
[i
] = LLVMTypeOf(args
[i
]);
99 function
= lp_declare_intrinsic(module
, name
, ret_type
, arg_types
, num_args
);
102 return LLVMBuildCall(builder
, function
, args
, num_args
, "");
107 lp_build_intrinsic_unary(LLVMBuilderRef builder
,
109 LLVMTypeRef ret_type
,
112 return lp_build_intrinsic(builder
, name
, ret_type
, &a
, 1);
117 lp_build_intrinsic_binary(LLVMBuilderRef builder
,
119 LLVMTypeRef ret_type
,
123 LLVMValueRef args
[2];
128 return lp_build_intrinsic(builder
, name
, ret_type
, args
, 2);
133 lp_build_intrinsic_map(struct gallivm_state
*gallivm
,
135 LLVMTypeRef ret_type
,
139 LLVMBuilderRef builder
= gallivm
->builder
;
140 LLVMTypeRef ret_elem_type
= LLVMGetElementType(ret_type
);
141 unsigned n
= LLVMGetVectorSize(ret_type
);
145 assert(num_args
<= LP_MAX_FUNC_ARGS
);
147 res
= LLVMGetUndef(ret_type
);
148 for(i
= 0; i
< n
; ++i
) {
149 LLVMValueRef index
= lp_build_const_int32(gallivm
, i
);
150 LLVMValueRef arg_elems
[LP_MAX_FUNC_ARGS
];
151 LLVMValueRef res_elem
;
152 for(j
= 0; j
< num_args
; ++j
)
153 arg_elems
[j
] = LLVMBuildExtractElement(builder
, args
[j
], index
, "");
154 res_elem
= lp_build_intrinsic(builder
, name
, ret_elem_type
, arg_elems
, num_args
);
155 res
= LLVMBuildInsertElement(builder
, res
, res_elem
, index
, "");
163 lp_build_intrinsic_map_unary(struct gallivm_state
*gallivm
,
165 LLVMTypeRef ret_type
,
168 return lp_build_intrinsic_map(gallivm
, name
, ret_type
, &a
, 1);
173 lp_build_intrinsic_map_binary(struct gallivm_state
*gallivm
,
175 LLVMTypeRef ret_type
,
179 LLVMValueRef args
[2];
184 return lp_build_intrinsic_map(gallivm
, name
, ret_type
, args
, 2);