Bryan Cain 691cc0e3a8 glsl_to_tgsi: implement ir_binop_logic_or using an add w/saturate or add w/SLT ... Logical-or is implemented using addition (followed by clamping to [0,1]) on values of 0.0 and 1.0. Replacing the logical-or operators with addition gives a + b which has a result on the range [0, 2]. Previously a SNE instruction was used to clamp the resulting logic value to [0,1]. In a fragment shader, using a saturate on the add has the same effect. Adding the saturate to the add is free, so (at least) one instruction is saved. In a vertex shader, using an SLT on the negation of the add result has the same effect. Many older shader architectures do not support the SNE instruction. It must be emulated using two SLT instructions and an ADD. On these architectures, the single SLT saves two instructions. Note that SNE is still used when integers are used for boolean values, since there is no such thing as an integer saturate, and older shader architectures without SNE don't support integers. This is a port of commit 41f8ffe5e0 to glsl_to_tgsi with integer support added.		2011-08-20 14:00:40 -05:00
..
egl	android: build core EGL	2011-08-21 02:01:49 +08:00
gallium	st/egl: add a missing include	2011-08-21 02:01:50 +08:00
gbm	gbm/dri: avoid crash in dri_screen_create	2011-08-04 14:09:34 +02:00
getopt
glsl	android: build glsl	2011-08-21 02:01:49 +08:00
glu
glx	glx: use a block to fix declarations after code warning	2011-08-19 08:36:22 -06:00
mapi	android: build shared glapi	2011-08-21 02:01:49 +08:00
mesa	glsl_to_tgsi: implement ir_binop_logic_or using an add w/saturate or add w/SLT	2011-08-20 14:00:40 -05:00
Makefile
SConscript	Squashed commit of the following:	2011-07-14 17:35:05 +01:00