Replace IROUND_POS with _mesa_roundevenf

Which has the same behavior as long as you don't change the FPU rounding
mode. Other code in mesa makes the same assumption so it should be safe
to make that assumption more generally.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3024>

3 files changed, 11 insertions, 14 deletions

diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c
index c71448750f2..d2b169332b7 100644
--- a/src/mesa/drivers/x11/xm_api.c
+++ b/src/mesa/drivers/x11/xm_api.c
@@ -84,7 +84,6 @@
 #include "tnl/t_pipeline.h"
 #include "drivers/common/driverfuncs.h"
 #include "drivers/common/meta.h"
-#include "util/u_math.h"
 
 /**
  * Global X driver lock
@@ -117,7 +116,7 @@ static int host_byte_order( void )
  */
 static int check_for_xshm( XMesaDisplay *display )
 {
-#if defined(USE_XSHM) 
+#if defined(USE_XSHM)
    int ignore;
 
    if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
@@ -151,7 +150,7 @@ gamma_adjust( GLfloat gamma, GLint value, GLint max )
    }
    else {
       double x = (double) value / (double) max;
-      return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma));
+      return lroundf((GLfloat) max * pow(x, 1.0F/gamma));
    }
 }
 
@@ -328,7 +327,7 @@ create_xmesa_buffer(XMesaDrawable d, BufferType type,
       b->backxrb->Parent = b;
       /* determine back buffer implementation */
       b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
-      
+
       _mesa_attach_and_own_rb(&b->mesa_buffer, BUFFER_BACK_LEFT,
                               &b->backxrb->Base.Base);
    }
@@ -686,12 +685,12 @@ xmesa_color_to_pixel(struct gl_context *ctx,
 
 /**
  * Convert an X visual type to a GLX visual type.
- * 
+ *
  * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
  *        to be converted.
  * \return If \c visualType is a valid X visual type, a GLX visual type will
  *         be returned.  Otherwise \c GLX_NONE will be returned.
- * 
+ *
  * \note
  * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
  * DRI CVS tree.
@@ -1333,7 +1332,7 @@ void XMesaSwapBuffers( XMesaBuffer b )
    if (b->db_mode) {
       if (b->backxrb->ximage) {
 	 /* Copy Ximage (back buf) from client memory to server window */
-#if defined(USE_XSHM) 
+#if defined(USE_XSHM)
 	 if (b->shm) {
             /*mtx_lock(&_xmesa_lock);*/
 	    XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
@@ -1387,14 +1386,14 @@ void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
 
    if (!b->backxrb) {
       /* single buffered */
-      return; 
+      return;
    }
 
    if (b->db_mode) {
       int yTop = b->mesa_buffer.Height - y - height;
       if (b->backxrb->ximage) {
          /* Copy Ximage from host's memory to server's window */
-#if defined(USE_XSHM) 
+#if defined(USE_XSHM)
          if (b->shm) {
             /* XXX assuming width and height aren't too large! */
             XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
diff --git a/src/mesa/swrast/s_aaline.c b/src/mesa/swrast/s_aaline.c
index 6ee61f738e9..03f8fd93b9c 100644
--- a/src/mesa/swrast/s_aaline.c
+++ b/src/mesa/swrast/s_aaline.c
@@ -25,7 +25,6 @@
 
 #include "c99_math.h"
 #include "main/glheader.h"
-#include "util/imports.h"
 #include "main/macros.h"
 #include "main/mtypes.h"
 #include "main/teximage.h"
@@ -181,7 +180,7 @@ solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4])
       return 0;
    else if (z > CHAN_MAX)
       return CHAN_MAX;
-   return (GLchan) IROUND_POS(z);
+   return (GLchan) lroundf(z);
 #endif
 }
 
@@ -327,7 +326,7 @@ compute_coveragef(const struct LineInfo *info,
 
 typedef void (*plot_func)(struct gl_context *ctx, struct LineInfo *line,
                           int ix, int iy);
-                         
+
 
 
 /*
diff --git a/src/mesa/swrast/s_aatriangle.c b/src/mesa/swrast/s_aatriangle.c
index 952bfb1a177..342b6e9f3ae 100644
--- a/src/mesa/swrast/s_aatriangle.c
+++ b/src/mesa/swrast/s_aatriangle.c
@@ -31,7 +31,6 @@
 #include "main/glheader.h"
 #include "main/context.h"
 #include "main/macros.h"
-#include "util/imports.h"
 #include "main/state.h"
 #include "s_aatriangle.h"
 #include "s_context.h"
@@ -124,7 +123,7 @@ solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4])
       return 0;
    else if (z > CHAN_MAX)
       return CHAN_MAX;
-   return (GLchan) IROUND_POS(z);
+   return (GLchan) lroundf(z);
 #endif
 }