summaryrefslogtreecommitdiffstats
path: root/configure.ac
diff options
context:
space:
mode:
Diffstat (limited to 'configure.ac')
-rw-r--r--configure.ac213
1 files changed, 102 insertions, 111 deletions
diff --git a/configure.ac b/configure.ac
index 4222c62..fb1bbb9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2353,61 +2353,56 @@ else
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM([
#include <string.h>
- ],[
- int main(void)
- {
- long double ld = 20041683600089727.779961L;
- long ll;
- unsigned long ull;
- unsigned char s[16];
- unsigned char s2[8];
- int ret = 1;
-
- if(sizeof(long double) == 16 && sizeof(long) == 8) {
- /*make sure the long double type has 16 bytes in size and
- * 11 bits of exponent. If it is,
- *the bit sequence should be like below. It's not
- *a decent way to check but this info isn't available. */
- memcpy(s, &ld, 16);
- if(s[0]==0x43 && s[1]==0x51 && s[2]==0xcc && s[3]==0xf3 &&
- s[4]==0x85 && s[5]==0xeb && s[6]==0xc8 && s[7]==0xa0 &&
- s[8]==0xbf && s[9]==0xcc && s[10]==0x2a && s[11]==0x3c) {
-
- /* Assign the hexadecimal value of long double type. */
- s[0]=0x43; s[1]=0x51; s[2]=0xcc; s[3]=0xf3;
- s[4]=0x85; s[5]=0xeb; s[6]=0xc8; s[7]=0xa0;
- s[8]=0xbf; s[9]=0xcc; s[10]=0x2a; s[11]=0x3c;
- s[12]=0x3d; s[13]=0x85; s[14]=0x56; s[15]=0x20;
-
- memcpy(&ld, s, 16);
-
- ll = (long)ld;
- memcpy(s2, &ll, 8);
-
- /* The library's algorithm converts it to 0x 00 47 33 ce 17 af 22 82
- * and gets wrong value 20041683600089730 on the IBM Power6 Linux.
- * But the IBM Power6 Linux converts it to 0x00 47 33 ce 17 af 22 7f
- * and gets the correct value 20041683600089727. It uses some special
- * algorithm. We're going to define the macro and skip the test until
- * we can figure out how they do it. */
- if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce &&
- s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f)
- ret = 0;
-
- ull = (unsigned long)ld;
- memcpy(s2, &ull, 8);
-
- /* The unsigned long is the same as signed long. */
- if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce &&
- s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f)
- ret = 0;
- }
- }
-
- done:
- exit(ret);
- }
- ])]
+ ],[[
+ long double ld = 20041683600089727.779961L;
+ long ll;
+ unsigned long ull;
+ unsigned char s[16];
+ unsigned char s2[8];
+ int ret = 1;
+
+ if(sizeof(long double) == 16 && sizeof(long) == 8) {
+ /*make sure the long double type has 16 bytes in size and
+ * 11 bits of exponent. If it is,
+ *the bit sequence should be like below. It's not
+ *a decent way to check but this info isn't available. */
+ memcpy(s, &ld, 16);
+ if(s[0]==0x43 && s[1]==0x51 && s[2]==0xcc && s[3]==0xf3 &&
+ s[4]==0x85 && s[5]==0xeb && s[6]==0xc8 && s[7]==0xa0 &&
+ s[8]==0xbf && s[9]==0xcc && s[10]==0x2a && s[11]==0x3c) {
+
+ /* Assign the hexadecimal value of long double type. */
+ s[0]=0x43; s[1]=0x51; s[2]=0xcc; s[3]=0xf3;
+ s[4]=0x85; s[5]=0xeb; s[6]=0xc8; s[7]=0xa0;
+ s[8]=0xbf; s[9]=0xcc; s[10]=0x2a; s[11]=0x3c;
+ s[12]=0x3d; s[13]=0x85; s[14]=0x56; s[15]=0x20;
+
+ memcpy(&ld, s, 16);
+
+ ll = (long)ld;
+ memcpy(s2, &ll, 8);
+
+ /* The library's algorithm converts it to 0x 00 47 33 ce 17 af 22 82
+ * and gets wrong value 20041683600089730 on the IBM Power6 Linux.
+ * But the IBM Power6 Linux converts it to 0x00 47 33 ce 17 af 22 7f
+ * and gets the correct value 20041683600089727. It uses some special
+ * algorithm. We're going to define the macro and skip the test until
+ * we can figure out how they do it. */
+ if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce &&
+ s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f)
+ ret = 0;
+
+ ull = (unsigned long)ld;
+ memcpy(s2, &ull, 8);
+
+ /* The unsigned long is the same as signed long. */
+ if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce &&
+ s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f)
+ ret = 0;
+ }
+ }
+ exit(ret);
+ ]])]
, [hdf5_cv_ldouble_to_long_special=yes], [hdf5_cv_ldouble_to_long_special=no],)])
fi
@@ -2436,63 +2431,59 @@ else
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM([
#include <string.h>
- ],[
- int main(void)
- {
- long double ld;
- long ll;
- unsigned long ull;
- unsigned char s[16];
- int flag=0, ret=1;
-
- /*Determine if long double has 16 byte in size, 11 bit exponent, and
- *the bias is 0x3ff */
- if(sizeof(long double) == 16) {
- ld = 1.0L;
- memcpy(s, &ld, 16);
- if(s[0]==0x3f && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 &&
- s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00)
- flag = 1;
- }
-
- if(flag==1 && sizeof(long)==8) {
- ll = 0x003fffffffffffffL;
- ld = (long double)ll;
- memcpy(s, &ld, 16);
- /* The library converts the value to 0x434fffffffffffff8000000000000000.
- * In decimal it is 18014398509481982.000000, one value short of the original.
- * The IBM Power6 Linux converts it to 0x4350000000000000bff0000000000000.
- * The value is correct in decimal. It uses some special
- * algorithm. We're going to define the macro and skip the test until
- * we can figure out how they do it. */
- if(s[0]==0x43 && s[1]==0x50 && s[2]==0x00 && s[3]==0x00 &&
- s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 &&
- s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 &&
- s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00)
- ret = 0;
- }
- if(flag==1 && sizeof(unsigned long)==8) {
- ull = 0xffffffffffffffffUL;
- ld = (long double)ull;
- memcpy(s, &ld, 16);
- /* Use a different value from signed long to test. The problem is the same
- * for both long and unsigned long. The value is 18446744073709551615.
- * The library converts the value to 0x43effffffffffffffe000000000000000.
- * In decimal it's 18446744073709548544.000000, very different from the original.
- * The IBM Power6 Linux converts it to 0x43f0000000000000bff0000000000000.
- * The value is correct in decimal. It uses some special
- * algorithm. We're going to define the macro and skip the test until
- * we can figure out how they do it. */
- if(s[0]==0x43 && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 &&
- s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 &&
- s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 &&
- s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00)
- ret = 0;
- }
- done:
- exit(ret);
+ ],[[
+ long double ld;
+ long ll;
+ unsigned long ull;
+ unsigned char s[16];
+ int flag=0, ret=1;
+
+ /*Determine if long double has 16 byte in size, 11 bit exponent, and
+ *the bias is 0x3ff */
+ if(sizeof(long double) == 16) {
+ ld = 1.0L;
+ memcpy(s, &ld, 16);
+ if(s[0]==0x3f && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 &&
+ s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00)
+ flag = 1;
}
- ])]
+
+ if(flag==1 && sizeof(long)==8) {
+ ll = 0x003fffffffffffffL;
+ ld = (long double)ll;
+ memcpy(s, &ld, 16);
+ /* The library converts the value to 0x434fffffffffffff8000000000000000.
+ * In decimal it is 18014398509481982.000000, one value short of the original.
+ * The IBM Power6 Linux converts it to 0x4350000000000000bff0000000000000.
+ * The value is correct in decimal. It uses some special
+ * algorithm. We're going to define the macro and skip the test until
+ * we can figure out how they do it. */
+ if(s[0]==0x43 && s[1]==0x50 && s[2]==0x00 && s[3]==0x00 &&
+ s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 &&
+ s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 &&
+ s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00)
+ ret = 0;
+ }
+ if(flag==1 && sizeof(unsigned long)==8) {
+ ull = 0xffffffffffffffffUL;
+ ld = (long double)ull;
+ memcpy(s, &ld, 16);
+ /* Use a different value from signed long to test. The problem is the same
+ * for both long and unsigned long. The value is 18446744073709551615.
+ * The library converts the value to 0x43effffffffffffffe000000000000000.
+ * In decimal it's 18446744073709548544.000000, very different from the original.
+ * The IBM Power6 Linux converts it to 0x43f0000000000000bff0000000000000.
+ * The value is correct in decimal. It uses some special
+ * algorithm. We're going to define the macro and skip the test until
+ * we can figure out how they do it. */
+ if(s[0]==0x43 && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 &&
+ s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 &&
+ s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 &&
+ s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00)
+ ret = 0;
+ }
+ exit(ret);
+ ]])]
, [hdf5_cv_long_to_ldouble_special=yes], [hdf5_cv_long_to_ldouble_special=no],)])
fi