r600/sfn: Add a load GDS result instruction

This is required to read results for atomic SSBO  instructions

Signed-off-by: Gert Wollny <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3225>

2 files changed, 32 insertions, 0 deletions

diff --git a/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.cpp b/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.cpp
index e51bb588969..0fc4f26358d 100644
--- a/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.cpp
@@ -301,6 +301,33 @@ LoadFromScratch::LoadFromScratch(GPRVector dst, PValue src, int scratch_size):
 {
 }
 
+FetchGDSOpResult::FetchGDSOpResult(const GPRVector dst, const PValue src):
+   FetchInstruction(vc_fetch,
+                    no_index_offset,
+                    fmt_32,
+                    vtx_nf_int,
+                    vtx_es_none,
+                    src,
+                    dst,
+                    0,
+                    false,
+                    0xf,
+                    R600_IMAGE_IMMED_RESOURCE_OFFSET,
+                    0,
+                    bim_none,
+                    false,
+                    false,
+                    0,
+                    0,
+                    0,
+                    PValue(),
+                    {0,7,7,7})
+{
+   set_flag(vtx_srf_mode);
+   set_flag(vtx_vpm);
+}
+
+
 static const char *fmt_descr[64] = {
    "INVALID",
    "8",
diff --git a/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.h b/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.h
index 465f604fed5..d1cc42f6135 100644
--- a/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.h
+++ b/src/gallium/drivers/r600/sfn/sfn_instruction_fetch.h
@@ -169,6 +169,11 @@ public:
    LoadFromScratch(GPRVector dst, PValue src, int scratch_size);
 };
 
+class FetchGDSOpResult : public FetchInstruction {
+public:
+   FetchGDSOpResult(const GPRVector dst, const PValue src);
+};
+
 }
 
 #endif // SFN_INSTRUCTION_FETCH_H