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 */
44static LLVMValueRef
45lp_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 */
78LLVMValueRef
79lp_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
158static unsigned
159lp_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 */
192LLVMValueRef
193lp_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