参数资料
型号: IPT-C2H-NIOS
厂商: Altera
文件页数: 125/138页
文件大小: 0K
描述: C2H COMPILER FOR NIOS II
标准包装: 1
系列: Nios®II
类型: Nios II
功能: C 到硬件编译器
许可证: 初始许可证
7. ANSI C Compliance and
Restrictions
Introduction
Language
The Nios II C-to-Hardware Acceleration (C2H) Compiler supports a large
subset of the ANSI C language as described in Chapter 5 and Chapter 6
of the ISO/IEC 9899:1999(E) Specification . The current Nios II
C2H Compiler does not support the C++ programming language or the
library functions described in Chapter 7 of the ISO/IEC 9899:1999(E)
Specification .
This chapter describes Nios II C2H Compiler restrictions, including
unsupported ANSI C language syntax, semantics, and constraints.
This section refers to Chapter 6 of the ISO/IEC 9899:1999(E) Specification .
Section and paragraph numbers from the ISO/IEC 9899:1999(E)
Specification are cited in parentheses.
Declarations
The C2H Compiler supports the majority of data types used in the C
programming language. The following sections describe C2H restrictions
on C declarations.
Unsupported Types (Section 6.7.2, Paragraph 1)
The following types are not supported by the C2H Compiler:
float - section 6.3.1.5
double - section 6.3.1.5
_Complex – section 6.3.1.7
_Bool – section 6.3.1.2
_Imaginary – section 6.3.1.7
The following types are supported if specific conditions are met:
Floating constants are supported only after casting to a supported
type.
For example, the following code casts π to an integer constant:
constant int pi - (int) 3.142957142957;
Altera Corporation
November 2009
9.1
7–1
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