From 9ea3941ffe1d04a0a214e695f1302a571f9640b1 Mon Sep 17 00:00:00 2001
From: Markus Hitter <mah@jump-ing.de>
Date: Wed, 3 Jun 2015 22:15:19 +0200
Subject: [PATCH] gcode_process.c: be more explicit about X_MIN,... type.

Big surprise, this makes the binary a whopping 286 bytes smaller
with software endstops enabled. Looking at the produced assembly,
the former code caused gcc to do the float -> integer conversion
at runtime, using a __floatsisf(). Now the X_MIN, X_MAX... values
are compiled in as integers directly.

This is work related to issue #157.
---
 gcode_process.c | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/gcode_process.c b/gcode_process.c
index 07cb850..4784004 100644
--- a/gcode_process.c
+++ b/gcode_process.c
@@ -63,31 +63,30 @@ void process_gcode_command() {
 
 	// implement axis limits
 	#ifdef	X_MIN
-    if (next_target.target.axis[X] < X_MIN * 1000.)
-      next_target.target.axis[X] = X_MIN * 1000.;
+    if (next_target.target.axis[X] < (int32_t)(X_MIN * 1000.))
+      next_target.target.axis[X] = (int32_t)(X_MIN * 1000.);
 	#endif
 	#ifdef	X_MAX
-    if (next_target.target.axis[X] > X_MAX * 1000.)
-      next_target.target.axis[X] = X_MAX * 1000.;
+    if (next_target.target.axis[X] > (int32_t)(X_MAX * 1000.))
+      next_target.target.axis[X] = (int32_t)(X_MAX * 1000.);
 	#endif
 	#ifdef	Y_MIN
-    if (next_target.target.axis[Y] < Y_MIN * 1000.)
-      next_target.target.axis[Y] = Y_MIN * 1000.;
+    if (next_target.target.axis[Y] < (int32_t)(Y_MIN * 1000.))
+      next_target.target.axis[Y] = (int32_t)(Y_MIN * 1000.);
 	#endif
 	#ifdef	Y_MAX
-    if (next_target.target.axis[Y] > Y_MAX * 1000.)
-      next_target.target.axis[Y] = Y_MAX * 1000.;
+    if (next_target.target.axis[Y] > (int32_t)(Y_MAX * 1000.))
+      next_target.target.axis[Y] = (int32_t)(Y_MAX * 1000.);
 	#endif
 	#ifdef	Z_MIN
-    if (next_target.target.axis[Z] < Z_MIN * 1000.)
-      next_target.target.axis[Z] = Z_MIN * 1000.;
+    if (next_target.target.axis[Z] < (int32_t)(Z_MIN * 1000.))
+      next_target.target.axis[Z] = (int32_t)(Z_MIN * 1000.);
 	#endif
 	#ifdef	Z_MAX
-    if (next_target.target.axis[Z] > Z_MAX * 1000.)
-      next_target.target.axis[Z] = Z_MAX * 1000.;
+    if (next_target.target.axis[Z] > (int32_t)(Z_MAX * 1000.))
+      next_target.target.axis[Z] = (int32_t)(Z_MAX * 1000.);
 	#endif
 
-
 	// The GCode documentation was taken from http://reprap.org/wiki/Gcode .
 
 	if (next_target.seen_T) {