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authorBrian Paul <brianp@vmware.com>2010-12-06 09:44:23 -0700
committerBrian Paul <brianp@vmware.com>2010-12-06 09:46:01 -0700
commitb89a731ff297dec597e3a4be1abf94e97d9b0e44 (patch)
tree05c4e5ac9db311db73cebf2f068b6147c8d37d18 /src
parent4538ce915ba4c43290f4341ad80040b4b735eab3 (diff)
mesa: add error margin to clip mask debug/check code
When X or Y or Z is close to W the outcome of the floating point clip test comparision may be different between the C and x86 asm paths. That's OK; don't report an error. See fd.o bug 32093
Diffstat (limited to 'src')
-rw-r--r--src/mesa/math/m_debug_clip.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/src/mesa/math/m_debug_clip.c b/src/mesa/math/m_debug_clip.c
index e97afafac3..bbad6ef024 100644
--- a/src/mesa/math/m_debug_clip.c
+++ b/src/mesa/math/m_debug_clip.c
@@ -208,6 +208,24 @@ ALIGN16(static GLfloat, d[TEST_COUNT][4]);
ALIGN16(static GLfloat, r[TEST_COUNT][4]);
+/**
+ * Check if X, Y or Z component of the coordinate is close to W, in terms
+ * of the clip test.
+ */
+static GLboolean
+xyz_close_to_w(const GLfloat c[4])
+{
+ float k = 0.0001;
+ return (fabs(c[0] - c[3]) < k ||
+ fabs(c[1] - c[3]) < k ||
+ fabs(c[2] - c[3]) < k ||
+ fabs(-c[0] - c[3]) < k ||
+ fabs(-c[1] - c[3]) < k ||
+ fabs(-c[2] - c[3]) < k);
+}
+
+
+
static int test_cliptest_function( clip_func func, int np,
int psize, long *cycles )
{
@@ -281,9 +299,18 @@ static int test_cliptest_function( clip_func func, int np,
}
for ( i = 0 ; i < TEST_COUNT ; i++ ) {
if ( dm[i] != rm[i] ) {
+ GLfloat *c = source->start;
+ STRIDE_F(c, source->stride * i);
+ if (psize == 4 && xyz_close_to_w(c)) {
+ /* The coordinate is very close to the clip plane. The clipmask
+ * may vary depending on code path, but that's OK.
+ */
+ continue;
+ }
printf( "\n-----------------------------\n" );
- printf( "(i = %i)\n", i );
- printf( "dm = 0x%02x rm = 0x%02x\n", dm[i], rm[i] );
+ printf( "mask[%d] = 0x%02x ref mask[%d] = 0x%02x\n", i, dm[i], i,rm[i] );
+ printf(" coord = %f, %f, %f, %f\n",
+ c[0], c[1], c[2], c[3]);
return 0;
}
}