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