1 /**************************************************************************
2 *
3 * Copyright 2010 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #include <stdio.h>
29 #include <inttypes.h>
30
31 #include "util/compiler.h"
32 #include "util/u_debug.h"
33 #include "util/u_memory.h"
34 #include "util/u_string.h"
35 #include "lp_bld_const.h"
36 #include "lp_bld_init.h"
37 #include "lp_bld_const.h"
38 #include "lp_bld_printf.h"
39 #include "lp_bld_type.h"
40
lp_init_printf_hook(struct gallivm_state * gallivm)41 void lp_init_printf_hook(struct gallivm_state *gallivm)
42 {
43 if (gallivm->debug_printf_hook)
44 return;
45 LLVMTypeRef printf_type = LLVMFunctionType(LLVMInt32TypeInContext(gallivm->context), NULL, 0, 1);
46 gallivm->debug_printf_hook = LLVMAddFunction(gallivm->module, "debug_printf", printf_type);
47 }
48
49 /**
50 * Generates LLVM IR to call debug_printf.
51 */
52 static LLVMValueRef
lp_build_print_args(struct gallivm_state * gallivm,int argcount,LLVMValueRef * args)53 lp_build_print_args(struct gallivm_state* gallivm,
54 int argcount,
55 LLVMValueRef* args)
56 {
57 LLVMBuilderRef builder = gallivm->builder;
58 LLVMContextRef context = gallivm->context;
59 int i;
60
61 assert(args);
62 assert(argcount > 0);
63 assert(LLVMTypeOf(args[0]) == LLVMPointerType(LLVMInt8TypeInContext(context), 0));
64
65 /* Cast any float arguments to doubles as printf expects */
66 for (i = 1; i < argcount; i++) {
67 LLVMTypeRef type = LLVMTypeOf(args[i]);
68
69 if (LLVMGetTypeKind(type) == LLVMFloatTypeKind)
70 args[i] = LLVMBuildFPExt(builder, args[i], LLVMDoubleTypeInContext(context), "");
71 }
72
73 lp_init_printf_hook(gallivm);
74 LLVMTypeRef printf_type = LLVMFunctionType(LLVMInt32TypeInContext(gallivm->context), NULL, 0, 1);
75 return LLVMBuildCall2(builder, printf_type, gallivm->debug_printf_hook, args, argcount, "");
76 }
77
78
79 /**
80 * Print a LLVM value of any type
81 */
82 LLVMValueRef
lp_build_print_value(struct gallivm_state * gallivm,const char * msg,LLVMValueRef value)83 lp_build_print_value(struct gallivm_state *gallivm,
84 const char *msg,
85 LLVMValueRef value)
86 {
87 LLVMBuilderRef builder = gallivm->builder;
88 LLVMTypeKind type_kind;
89 LLVMTypeRef type_ref;
90 LLVMValueRef params[2 + LP_MAX_VECTOR_LENGTH];
91 char type_fmt[6] = " %x";
92 char format[2 + 5 * LP_MAX_VECTOR_LENGTH + 2] = "%s";
93 unsigned length;
94 unsigned i;
95
96 type_ref = LLVMTypeOf(value);
97 type_kind = LLVMGetTypeKind(type_ref);
98
99 if (type_kind == LLVMVectorTypeKind) {
100 length = LLVMGetVectorSize(type_ref);
101
102 type_ref = LLVMGetElementType(type_ref);
103 type_kind = LLVMGetTypeKind(type_ref);
104 } else {
105 length = 1;
106 }
107
108 if (type_kind == LLVMFloatTypeKind || type_kind == LLVMDoubleTypeKind || type_kind == LLVMHalfTypeKind) {
109 type_fmt[2] = '.';
110 type_fmt[3] = '9';
111 type_fmt[4] = 'g';
112 type_fmt[5] = '\0';
113 } else if (type_kind == LLVMIntegerTypeKind) {
114 if (LLVMGetIntTypeWidth(type_ref) == 64) {
115 snprintf(type_fmt + 2, 3, "%s", PRId64);
116 } else if (LLVMGetIntTypeWidth(type_ref) == 8) {
117 type_fmt[2] = 'u';
118 } else {
119 type_fmt[2] = 'i';
120 }
121 } else if (type_kind == LLVMPointerTypeKind) {
122 type_fmt[2] = 'p';
123 } else {
124 /* Unsupported type */
125 assert(0);
126 }
127
128 /* Create format string and arguments */
129 assert(strlen(format) + strlen(type_fmt) * length + 2 <= sizeof format);
130
131 params[1] = lp_build_const_string(gallivm, msg);
132 if (length == 1) {
133 strncat(format, type_fmt, sizeof(format) - strlen(format) - 1);
134 params[2] = value;
135 } else {
136 for (i = 0; i < length; ++i) {
137 LLVMValueRef param;
138 strncat(format, type_fmt, sizeof(format) - strlen(format) - 1);
139 param = LLVMBuildExtractElement(builder, value, lp_build_const_int32(gallivm, i), "");
140 if (type_kind == LLVMIntegerTypeKind &&
141 LLVMGetIntTypeWidth(type_ref) < sizeof(int) * 8) {
142 LLVMTypeRef int_type = LLVMIntTypeInContext(gallivm->context, sizeof(int) * 8);
143 if (LLVMGetIntTypeWidth(type_ref) == 8) {
144 param = LLVMBuildZExt(builder, param, int_type, "");
145 } else {
146 param = LLVMBuildSExt(builder, param, int_type, "");
147 }
148 }
149 params[2 + i] = param;
150 }
151 }
152
153 strncat(format, "\n", sizeof(format) - strlen(format) - 1);
154
155 params[0] = lp_build_const_string(gallivm, format);
156 return lp_build_print_args(gallivm, 2 + length, params);
157 }
158
159
160 static unsigned
lp_get_printf_arg_count(const char * fmt)161 lp_get_printf_arg_count(const char *fmt)
162 {
163 unsigned count = 0;
164 const char *p = fmt;
165 int c;
166
167 while ((c = *p++)) {
168 if (c != '%')
169 continue;
170 switch (*p) {
171 case '\0':
172 continue;
173 case '%':
174 p++;
175 continue;
176 case '.':
177 if (p[1] == '*' && p[2] == 's') {
178 count += 2;
179 p += 3;
180 continue;
181 }
182 FALLTHROUGH;
183 default:
184 count ++;
185 }
186 }
187 return count;
188 }
189
190
191 /**
192 * Generate LLVM IR for a c style printf
193 */
194 LLVMValueRef
lp_build_printf(struct gallivm_state * gallivm,const char * fmt,...)195 lp_build_printf(struct gallivm_state *gallivm,
196 const char *fmt, ...)
197 {
198 LLVMValueRef params[50];
199 va_list arglist;
200 unsigned argcount, i;
201
202 argcount = lp_get_printf_arg_count(fmt);
203 assert(ARRAY_SIZE(params) >= argcount + 1);
204
205 va_start(arglist, fmt);
206 for (i = 1; i <= argcount; i++) {
207 params[i] = va_arg(arglist, LLVMValueRef);
208 }
209 va_end(arglist);
210
211 params[0] = lp_build_const_string(gallivm, fmt);
212 return lp_build_print_args(gallivm, argcount + 1, params);
213 }
214