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authorMarc G. Fournier <scrappy@hub.org>1997-03-12 21:13:19 +0000
committerMarc G. Fournier <scrappy@hub.org>1997-03-12 21:13:19 +0000
commit5dde558ce60db1f8747bbf745d56bd9cd5f4c7b7 (patch)
tree046cc029a35d6e30af46ea08f8eae259eb739a8d /src/backend/utils/adt/float.c
parentb66569e41fdecab3903fd8af6cbc8bb12ae653cd (diff)
downloadpostgresql-5dde558ce60db1f8747bbf745d56bd9cd5f4c7b7.tar.gz
postgresql-5dde558ce60db1f8747bbf745d56bd9cd5f4c7b7.zip
From: Dan McGuirk <mcguirk@indirect.com>
Subject: [HACKERS] linux/alpha patches These patches lay the groundwork for a Linux/Alpha port. The port doesn't actually work unless you tweak the linker to put all the pointers in the first 32 bits of the address space, but it's at least a start. It implements the test-and-set instruction in Alpha assembly, and also fixes a lot of pointer-to-integer conversions, which is probably good anyway.
Diffstat (limited to 'src/backend/utils/adt/float.c')
-rw-r--r--src/backend/utils/adt/float.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c
index 52fc5f98e3a..509ce6ce6d4 100644
--- a/src/backend/utils/adt/float.c
+++ b/src/backend/utils/adt/float.c
@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.12 1997/02/19 20:10:49 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.13 1997/03/12 21:09:11 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@@ -100,6 +100,26 @@ extern double atof(const char *p);
#define FLOAT8_MAX DBL_MAX
#define FLOAT8_MIN DBL_MIN
+/*
+ * if FLOAT8_MIN and FLOAT8_MAX are the limits of the range a
+ * double can store, then how are we ever going to wind up
+ * with something stored in a double that is outside those
+ * limits? (and similarly for FLOAT4_{MIN,MAX}/float.)
+ * doesn't make sense to me, and it causes a
+ * floating point exception on linuxalpha, so UNSAFE_FLOATS
+ * it is.
+ * (maybe someone wanted to allow for values other than DBL_MIN/
+ * DBL_MAX for FLOAT8_MIN/FLOAT8_MAX?)
+ * --djm 12/12/96
+ * according to Richard Henderson this is a known bug in gcc on
+ * the Alpha. might as well leave the workaround in
+ * until the distributions are updated.
+ * --djm 12/16/96
+ */
+#if defined(linuxalpha) && !defined(UNSAFE_FLOATS)
+#define UNSAFE_FLOATS
+#endif
+
/*
check to see if a float4 val is outside of
the FLOAT4_MIN, FLOAT4_MAX bounds.