From: Dave Airlie <airl...@redhat.com>
We had a bug report from some screensavers in xscreensaver package
not working on ppc64be, I took a day out to cause myself undue pain.
I tracked it down to the depth buffer not being read correctly,
I've no idea if this is the proper fix for it, I need to run
some more piglit on it. (my ppc64 f20 box is in a state of bad flux,
and needs more RAM.)
This does fix glean stencil2, glsl1 frag writing tests at least.
Signed-off-by: Dave Airlie <airl...@redhat.com>
---
src/gallium/drivers/llvmpipe/lp_bld_depth.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_depth.c
b/src/gallium/drivers/llvmpipe/lp_bld_depth.c
index 5c13ee5..8e8b394 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_depth.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_depth.c
@@ -365,6 +365,10 @@ get_z_shift_and_mask(const struct util_format_description
*format_desc,
*width = format_desc->channel[z_swizzle].size;
*shift = format_desc->channel[z_swizzle].shift;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ *shift = total_bits - *width - *shift;
+#endif
+
if (*width == total_bits) {
*mask = 0xffffffff;
} else {
@@ -403,6 +407,9 @@ get_s_shift_and_mask(const struct util_format_description
*format_desc,
*shift = format_desc->channel[s_swizzle].shift;
sz = format_desc->channel[s_swizzle].size;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ *shift = format_desc->block.bits - sz - *shift;
+#endif
*mask = (1U << sz) - 1U;
return TRUE;
--
1.9.3
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