From f95e394e35406c2782ecb7801ea1535558f8c464 Mon Sep 17 00:00:00 2001 From: pfg Date: Sat, 31 Aug 2013 20:33:37 +0000 Subject: Add support for the GCC binary integer constants extension. This is required to build the i965 backend with newer versions of mesa. Original patch from Joerg Wunsch in GCC Bug 23479, under the GPLv2; also taken from there in OpenBSD. Obtained from: gcc 4.3 (rev. 125346; GPLv2) MFC after: 5 days --- contrib/gcclibs/libcpp/expr.c | 46 ++++++++++++++++++++++++++++++--- contrib/gcclibs/libcpp/include/cpplib.h | 1 + 2 files changed, 44 insertions(+), 3 deletions(-) (limited to 'contrib/gcclibs/libcpp') diff --git a/contrib/gcclibs/libcpp/expr.c b/contrib/gcclibs/libcpp/expr.c index bf8baaf..24fcb1b8 100644 --- a/contrib/gcclibs/libcpp/expr.c +++ b/contrib/gcclibs/libcpp/expr.c @@ -188,6 +188,11 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token) radix = 16; str++; } + else if ((*str == 'b' || *str == 'B') && (str[1] == '0' || str[1] == '1')) + { + radix = 2; + str++; + } } /* Now scan for a well-formed integer or float. */ @@ -226,10 +231,22 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token) radix = 10; if (max_digit >= radix) - SYNTAX_ERROR2 ("invalid digit \"%c\" in octal constant", '0' + max_digit); + { + if (radix == 2) + SYNTAX_ERROR2 ("invalid digit \"%c\" in binary constant", '0' + max_digit); + else + SYNTAX_ERROR2 ("invalid digit \"%c\" in octal constant", '0' + max_digit); + } if (float_flag != NOT_FLOAT) { + if (radix == 2) + { + cpp_error (pfile, CPP_DL_ERROR, + "invalid prefix \"0b\" for floating constant"); + return CPP_N_INVALID; + } + if (radix == 16 && CPP_PEDANTIC (pfile) && !CPP_OPTION (pfile, c99)) cpp_error (pfile, CPP_DL_PEDWARN, "use of C99 hexadecimal floating constant"); @@ -321,11 +338,16 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token) if ((result & CPP_N_IMAGINARY) && CPP_PEDANTIC (pfile)) cpp_error (pfile, CPP_DL_PEDWARN, "imaginary constants are a GCC extension"); + if (radix == 2 && CPP_PEDANTIC (pfile)) + cpp_error (pfile, CPP_DL_PEDWARN, + "binary constants are a GCC extension"); if (radix == 10) result |= CPP_N_DECIMAL; else if (radix == 16) result |= CPP_N_HEX; + else if (radix == 2) + result |= CPP_N_BINARY; else result |= CPP_N_OCTAL; @@ -376,6 +398,11 @@ cpp_interpret_integer (cpp_reader *pfile, const cpp_token *token, base = 16; p += 2; } + else if ((type & CPP_N_RADIX) == CPP_N_BINARY) + { + base = 2; + p += 2; + } /* We can add a digit to numbers strictly less than this without needing the precision and slowness of double integers. */ @@ -431,12 +458,25 @@ static cpp_num append_digit (cpp_num num, int digit, int base, size_t precision) { cpp_num result; - unsigned int shift = 3 + (base == 16); + unsigned int shift; bool overflow; cpp_num_part add_high, add_low; - /* Multiply by 8 or 16. Catching this overflow here means we don't + /* Multiply by 2, 8 or 16. Catching this overflow here means we don't need to worry about add_high overflowing. */ + switch (base) + { + case 2: + shift = 1; + break; + + case 16: + shift = 4; + break; + + default: + shift = 3; + } overflow = !!(num.high >> (PART_PRECISION - shift)); result.high = num.high << shift; result.low = num.low << shift; diff --git a/contrib/gcclibs/libcpp/include/cpplib.h b/contrib/gcclibs/libcpp/include/cpplib.h index 851a2e3..7fd73b8 100644 --- a/contrib/gcclibs/libcpp/include/cpplib.h +++ b/contrib/gcclibs/libcpp/include/cpplib.h @@ -745,6 +745,7 @@ struct cpp_num #define CPP_N_DECIMAL 0x0100 #define CPP_N_HEX 0x0200 #define CPP_N_OCTAL 0x0400 +#define CPP_N_BINARY 0x0800 #define CPP_N_UNSIGNED 0x1000 /* Properties. */ #define CPP_N_IMAGINARY 0x2000 -- cgit v1.1