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Bug 3768 - provide a quick copysign() solution for watcom
Summary: provide a quick copysign() solution for watcom
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: *don't know* (show other bugs)
Version: HG 2.0
Hardware: x86 All
: P2 normal
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-08-21 23:06 UTC by Ozkan Sezer
Modified: 2017-08-21 23:30 UTC (History)
0 users

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Description Ozkan Sezer 2017-08-21 23:06:53 UTC 
The following patch provides a quick copysign solution for Watcom/x86

----

diff -r 23000b73ce4e src/stdlib/SDL_stdlib.c
--- a/src/stdlib/SDL_stdlib.c
+++ b/src/stdlib/SDL_stdlib.c
@@ -109,6 +109,12 @@ SDL_copysign(double x, double y)
     return copysign(x, y);
 #elif defined(HAVE__COPYSIGN)
     return _copysign(x, y);
+#elif defined(__WATCOMC__) && defined(__386__)
+    /* this is nasty as hell, but it works.. */
+    unsigned int *xi = (unsigned int *) &x,
+                 *yi = (unsigned int *) &y;
+    xi[1] = (yi[1] & 0x80000000) | (xi[1] & 0x7fffffff);
+    return x;
 #else
     return SDL_uclibc_copysign(x, y);
 #endif /* HAVE_COPYSIGN */
Comment 1 Sam Lantinga 2017-08-21 23:30:44 UTC 
Added!
https://hg.libsdl.org/SDL/rev/8b3231952c22