Mesa (master): r600g/sb: fix handling of preloaded inputs for compute shaders

[Vadim Girlin]

Module: Mesa
Branch: master
Commit: 44a117ab9ac7e18ffddf4d59ae35fe2c266efc1d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=44a117ab9ac7e18ffddf4d59ae35fe2c266efc1d

Author: Vadim Girlin <vadimgirlin at gmail.com>
Date:   Sat May 25 22:56:53 2013 +0400

r600g/sb: fix handling of preloaded inputs for compute shaders

For compute shaders we need to let the backend know that
GPRs 0 and 1 are preloaded with some compute-specific input
values, otherwise any use of these regs without previous
definition is considered as undefined value and usually
is simply replaced with 0.

Signed-off-by: Vadim Girlin <vadimgirlin at gmail.com>

---

 src/gallium/drivers/r600/sb/sb_bc_parser.cpp |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
index 3ea09cb..c2443b8 100644
--- a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
+++ b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
@@ -111,6 +111,10 @@ int bc_parser::parse_decls() {
 	if (!pshader) {
 		if (gpr_reladdr)
 			sh->add_gpr_array(0, bc->ngpr, 0x0F);
+
+		// compute shaders have some values preloaded in R0, R1
+		sh->add_input(0 /* GPR */, true /* preloaded */, 0x0F /* mask */);
+		sh->add_input(1 /* GPR */, true /* preloaded */, 0x0F /* mask */);
 		return 0;
 	}