From: divverent <divverent@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Mon, 24 Aug 2009 05:41:33 +0000 (+0000)
Subject: chnage "negative zero" check to actually check the bit pattern of IEEE negative zeros... 
X-Git-Tag: xonotic-v0.1.0preview~1488
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=79e93e2deaa3db0e02fa9ec1ff1268bb02a14254;p=xonotic%2Fdarkplaces.git

chnage "negative zero" check to actually check the bit pattern of IEEE negative zeros; might fix motorsep's problems on Win32/SDL only (maybe SDL changes FPU parameters?)


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9141 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/prvm_execprogram.h b/prvm_execprogram.h
index 97bf15d7..f29299d2 100644
--- a/prvm_execprogram.h
+++ b/prvm_execprogram.h
@@ -259,8 +259,8 @@
 		//==================
 
 			case OP_IFNOT:
-				if (!OPA->_float)
-				// TODO add an "int-ifnot"
+				if (!(OPA->_int & 0x7FFFFFFF)) // also match "negative zero" floats of value 0x80000000
+				// TODO add an "int-if", and change this one to OPA->_float
 				// although mostly unneeded, thanks to the only float being false being 0x0 and 0x80000000 (negative zero)
 				// and entity, string, field values can never have that value
 				{
@@ -280,8 +280,8 @@
 				break;
 
 			case OP_IF:
-				if (OPA->_float)
-				// TODO add an "int-if"
+				if (!(OPA->_int & 0x7FFFFFFF)) // also match "negative zero" floats of value 0x80000000
+				// TODO add an "int-if", and change this one to OPA->_float
 				// although mostly unneeded, thanks to the only float being false being 0x0 and 0x80000000 (negative zero)
 				// and entity, string, field values can never have that value
 				{