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tgsi: Clamp the source argument in micro_exp2() to avoid Inf.
author
Michal Krol
<michal@vmware.com>
Mon, 23 Nov 2009 10:32:58 +0000
(11:32 +0100)
committer
Michal Krol
<michal@vmware.com>
Mon, 23 Nov 2009 10:32:58 +0000
(11:32 +0100)
src/gallium/auxiliary/tgsi/tgsi_exec.c
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diff --git
a/src/gallium/auxiliary/tgsi/tgsi_exec.c
b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index d52c94fcfa128c4435cb6b875e16e9a5f9e59cce..af914f6d089f6743a32793642cf835d47dce5e2e 100644
(file)
--- a/
src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/
src/gallium/auxiliary/tgsi/tgsi_exec.c
@@
-578,6
+578,24
@@
micro_exp2(
dst->f[2] = util_fast_exp2( src->f[2] );
dst->f[3] = util_fast_exp2( src->f[3] );
#else
dst->f[2] = util_fast_exp2( src->f[2] );
dst->f[3] = util_fast_exp2( src->f[3] );
#else
+
+#if DEBUG
+ /* Inf is okay for this instruction, so clamp it to silence assertions. */
+ uint i;
+ union tgsi_exec_channel clamped;
+
+ for (i = 0; i < 4; i++) {
+ if (src->f[i] > 127.99999f) {
+ clamped.f[i] = 127.99999f;
+ } else if (src->f[i] < -126.99999f) {
+ clamped.f[i] = -126.99999f;
+ } else {
+ clamped.f[i] = src->f[i];
+ }
+ }
+ src = &clamped;
+#endif
+
dst->f[0] = powf( 2.0f, src->f[0] );
dst->f[1] = powf( 2.0f, src->f[1] );
dst->f[2] = powf( 2.0f, src->f[2] );
dst->f[0] = powf( 2.0f, src->f[0] );
dst->f[1] = powf( 2.0f, src->f[1] );
dst->f[2] = powf( 2.0f, src->f[2] );