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Posted to commits@lucy.apache.org by nw...@apache.org on 2012/11/10 17:55:06 UTC
[lucy-commits] [3/3] git commit: refs/heads/msvc6 - Add Charmonizer macro for
converting uint64_t to double
Add Charmonizer macro for converting uint64_t to double
Project: http://git-wip-us.apache.org/repos/asf/lucy/repo
Commit: http://git-wip-us.apache.org/repos/asf/lucy/commit/29339c45
Tree: http://git-wip-us.apache.org/repos/asf/lucy/tree/29339c45
Diff: http://git-wip-us.apache.org/repos/asf/lucy/diff/29339c45
Branch: refs/heads/msvc6
Commit: 29339c457e2929252bd5b7419bd2116c28fdb928
Parents: 94be23f
Author: Nick Wellnhofer <we...@aevum.de>
Authored: Sat Nov 10 17:33:02 2012 +0100
Committer: Nick Wellnhofer <we...@aevum.de>
Committed: Sat Nov 10 17:33:02 2012 +0100
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charmonizer/src/Charmonizer/Probe/Integers.c | 35 +++++++++++++++++++++
1 files changed, 35 insertions(+), 0 deletions(-)
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http://git-wip-us.apache.org/repos/asf/lucy/blob/29339c45/charmonizer/src/Charmonizer/Probe/Integers.c
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diff --git a/charmonizer/src/Charmonizer/Probe/Integers.c b/charmonizer/src/Charmonizer/Probe/Integers.c
index f18e808..2e75c36 100644
--- a/charmonizer/src/Charmonizer/Probe/Integers.c
+++ b/charmonizer/src/Charmonizer/Probe/Integers.c
@@ -60,6 +60,17 @@ static const char chaz_Integers_literal64_code[] =
CHAZ_QUOTE( return 0; )
CHAZ_QUOTE( } );
+static const char chaz_Integers_u64_to_double_code[] =
+ CHAZ_QUOTE( #include "_charm.h" )
+ CHAZ_QUOTE( int main() )
+ CHAZ_QUOTE( { )
+ CHAZ_QUOTE( unsigned __int64 int_num = 0; )
+ CHAZ_QUOTE( double float_num; )
+ CHAZ_QUOTE( Charm_Setup; )
+ CHAZ_QUOTE( float_num = (double)int_num; )
+ CHAZ_QUOTE( return 0; )
+ CHAZ_QUOTE( } );
+
void
chaz_Integers_run(void) {
char *output;
@@ -79,6 +90,7 @@ chaz_Integers_run(void) {
int has___int64 = false;
int has_inttypes = chaz_HeadCheck_check_header("inttypes.h");
int has_stdint = chaz_HeadCheck_check_header("stdint.h");
+ int can_convert_u64_to_double = true;
char i32_t_type[10];
char i32_t_postfix[10];
char u32_t_postfix[10];
@@ -200,6 +212,15 @@ chaz_Integers_run(void) {
}
}
+ /* Determine whether conversion of unsigned __int64 to double works */
+ if (has___int64) {
+ output = chaz_CC_capture_output(chaz_Integers_u64_to_double_code,
+ &output_len);
+ if (output == NULL) {
+ can_convert_u64_to_double = false;
+ }
+ }
+
/* Write out some conditional defines. */
if (has_inttypes) {
chaz_ConfWriter_add_def("HAS_INTTYPES_H", NULL);
@@ -387,6 +408,20 @@ chaz_Integers_run(void) {
}
}
+ /* Create macro for converting uint64_t to double. */
+ if (can_convert_u64_to_double) {
+ chaz_ConfWriter_add_def("U64_TO_DOUBLE(num)",
+ "((double)(num))");
+ }
+ else {
+ chaz_ConfWriter_add_def(
+ "U64_TO_DOUBLE(num)",
+ "((num) & CHY_U64_C(0x8000000000000000) ? "
+ "(double)(int64_t)((num) & CHY_U64_C(0x7FFFFFFFFFFFFFFF)) + "
+ "9223372036854775808.0 : "
+ "(double)(int64_t)(num))");
+ }
+
/* True and false. */
chaz_ConfWriter_append_conf(
"#ifndef true\n"