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/u_debug.h"
32 #include "util/u_memory.h"
33 #include "util/u_string.h"
34 #include "lp_bld_const.h"
35 #include "lp_bld_init.h"
36 #include "lp_bld_const.h"
37 #include "lp_bld_printf.h"
38 #include "lp_bld_type.h"
39
40
41 /**
42 * Generates LLVM IR to call debug_printf.
43 */
44 static LLVMValueRef
lp_build_print_args(struct gallivm_state * gallivm,int argcount,LLVMValueRef * args)45 lp_build_print_args(struct gallivm_state* gallivm,
46 int argcount,
47 LLVMValueRef* args)
48 {
49 LLVMBuilderRef builder = gallivm->builder;
50 LLVMContextRef context = gallivm->context;
51 LLVMValueRef func_printf;
52 LLVMTypeRef printf_type;
53 int i;
54
55 assert(args);
56 assert(argcount > 0);
57 assert(LLVMTypeOf(args[0]) == LLVMPointerType(LLVMInt8TypeInContext(context), 0));
58
59 /* Cast any float arguments to doubles as printf expects */
60 for (i = 1; i < argcount; i++) {
61 LLVMTypeRef type = LLVMTypeOf(args[i]);
62
63 if (LLVMGetTypeKind(type) == LLVMFloatTypeKind)
64 args[i] = LLVMBuildFPExt(builder, args[i], LLVMDoubleTypeInContext(context), "");
65 }
66
67 printf_type = LLVMFunctionType(LLVMInt32TypeInContext(context), NULL, 0, 1);
68 func_printf = lp_build_const_int_pointer(gallivm, func_to_pointer((func_pointer)debug_printf));
69 func_printf = LLVMBuildBitCast(builder, func_printf, LLVMPointerType(printf_type, 0), "debug_printf");
70
71 return LLVMBuildCall(builder, func_printf, args, argcount, "");
72 }
73
74
75 /**
76 * Print a LLVM value of any type
77 */
78 LLVMValueRef
lp_build_print_value(struct gallivm_state * gallivm,const char * msg,LLVMValueRef value)79 lp_build_print_value(struct gallivm_state *gallivm,
80 const char *msg,
81 LLVMValueRef value)
82 {
83 LLVMBuilderRef builder = gallivm->builder;
84 LLVMTypeKind type_kind;
85 LLVMTypeRef type_ref;
86 LLVMValueRef params[2 + LP_MAX_VECTOR_LENGTH];
87 char type_fmt[6] = " %x";
88 char format[2 + 5 * LP_MAX_VECTOR_LENGTH + 2] = "%s";
89 unsigned length;
90 unsigned i;
91
92 type_ref = LLVMTypeOf(value);
93 type_kind = LLVMGetTypeKind(type_ref);
94
95 if (type_kind == LLVMVectorTypeKind) {
96 length = LLVMGetVectorSize(type_ref);
97
98 type_ref = LLVMGetElementType(type_ref);
99 type_kind = LLVMGetTypeKind(type_ref);
100 } else {
101 length = 1;
102 }
103
104 if (type_kind == LLVMFloatTypeKind || type_kind == LLVMDoubleTypeKind) {
105 type_fmt[2] = '.';
106 type_fmt[3] = '9';
107 type_fmt[4] = 'g';
108 type_fmt[5] = '\0';
109 } else if (type_kind == LLVMIntegerTypeKind) {
110 if (LLVMGetIntTypeWidth(type_ref) == 64) {
111 unsigned flen = strlen(PRId64);
112 assert(flen <= 3);
113 strncpy(type_fmt + 2, PRId64, flen);
114 } else if (LLVMGetIntTypeWidth(type_ref) == 8) {
115 type_fmt[2] = 'u';
116 } else {
117 type_fmt[2] = 'i';
118 }
119 } else if (type_kind == LLVMPointerTypeKind) {
120 type_fmt[2] = 'p';
121 } else {
122 /* Unsupported type */
123 assert(0);
124 }
125
126 /* Create format string and arguments */
127 assert(strlen(format) + strlen(type_fmt) * length + 2 <= sizeof format);
128
129 params[1] = lp_build_const_string(gallivm, msg);
130 if (length == 1) {
131 util_strncat(format, type_fmt, sizeof(format) - strlen(format) - 1);
132 params[2] = value;
133 } else {
134 for (i = 0; i < length; ++i) {
135 LLVMValueRef param;
136 util_strncat(format, type_fmt, sizeof(format) - strlen(format) - 1);
137 param = LLVMBuildExtractElement(builder, value, lp_build_const_int32(gallivm, i), "");
138 if (type_kind == LLVMIntegerTypeKind &&
139 LLVMGetIntTypeWidth(type_ref) < sizeof(int) * 8) {
140 LLVMTypeRef int_type = LLVMIntTypeInContext(gallivm->context, sizeof(int) * 8);
141 if (LLVMGetIntTypeWidth(type_ref) == 8) {
142 param = LLVMBuildZExt(builder, param, int_type, "");
143 } else {
144 param = LLVMBuildSExt(builder, param, int_type, "");
145 }
146 }
147 params[2 + i] = param;
148 }
149 }
150
151 util_strncat(format, "\n", sizeof(format) - strlen(format) - 1);
152
153 params[0] = lp_build_const_string(gallivm, format);
154 return lp_build_print_args(gallivm, 2 + length, params);
155 }
156
157
158 static unsigned
lp_get_printf_arg_count(const char * fmt)159 lp_get_printf_arg_count(const char *fmt)
160 {
161 unsigned count = 0;
162 const char *p = fmt;
163 int c;
164
165 while ((c = *p++)) {
166 if (c != '%')
167 continue;
168 switch (*p) {
169 case '\0':
170 continue;
171 case '%':
172 p++;
173 continue;
174 case '.':
175 if (p[1] == '*' && p[2] == 's') {
176 count += 2;
177 p += 3;
178 continue;
179 }
180 /* fallthrough */
181 default:
182 count ++;
183 }
184 }
185 return count;
186 }
187
188
189 /**
190 * Generate LLVM IR for a c style printf
191 */
192 LLVMValueRef
lp_build_printf(struct gallivm_state * gallivm,const char * fmt,...)193 lp_build_printf(struct gallivm_state *gallivm,
194 const char *fmt, ...)
195 {
196 LLVMValueRef params[50];
197 va_list arglist;
198 unsigned argcount, i;
199
200 argcount = lp_get_printf_arg_count(fmt);
201 assert(ARRAY_SIZE(params) >= argcount + 1);
202
203 va_start(arglist, fmt);
204 for (i = 1; i <= argcount; i++) {
205 params[i] = va_arg(arglist, LLVMValueRef);
206 }
207 va_end(arglist);
208
209 params[0] = lp_build_const_string(gallivm, fmt);
210 return lp_build_print_args(gallivm, argcount + 1, params);
211 }
212