Forgot the inline assembler parts, here they come! Using inline asm to get rid of all the boilerplate stuff

1 files changed, 80 insertions, 0 deletions

diff --git a/src/asm/ftola.c b/src/asm/ftola.c
new file mode 100644
index 00000000..7bfc6078
--- /dev/null
+++ b/src/asm/ftola.c
@@ -0,0 +1,80 @@
+/*
+===========================================================================
+Copyright (C) 2011 Thilo Schulz <thilo@tjps.eu>
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena source code is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the License,
+or (at your option) any later version.
+
+Quake III Arena source code is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+along with Quake III Arena source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+#include "qasm-inline.h"
+
+/*
+ * GNU inline asm ftol conversion functions using SSE or FPU
+ */
+
+long qftolsse(float f)
+{
+  register long retval;
+  
+  __asm__ volatile
+  (
+    "cvttss2si %1, %0\n"
+    : "=a" (retval)
+    : "x" (f)
+  );
+  
+  return retval;
+}
+
+void qvmftolsse(void)
+{
+  __asm__ volatile
+  (
+    "movss (" EDI ", " EBX ", 4), %%xmm0\n"
+    "cvttss2si %%xmm0, " EAX "\n"
+    :
+    :
+    : "%xmm0"
+  );
+}
+
+long qftolx87(float f)
+{
+  register long retval;
+
+  __asm__ volatile
+  (
+    "flds %1\n"
+    "fistpl %1\n"
+    "mov %1, %0\n"
+    : "=a" (retval)
+    : "m" (f)
+  );
+  
+  return retval;
+}
+
+void qvmftolx87(void)
+{
+  __asm__ volatile
+  (
+    "flds (" EDI ", " EBX ", 4)\n"
+    "fistpl (" EDI ", " EBX ", 4)\n"
+    "mov (" EDI ", " EBX ", 4), " EAX "\n"
+    :
+  );
+}