[Mesa-dev] [PATCH] r600/atomic: fix ATOMCAS instruction.

[Dave Airlie]

From: Dave Airlie <airl...@redhat.com>

This has 3 srcs.

This fixes:
KHR-GL45.shader_atomic_counter_ops_tests.ShaderAtomicCounterOpsExchangeTestCase

Signed-off-by: Dave Airlie <airl...@redhat.com>
---
 src/gallium/drivers/r600/r600_shader.c | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/r600/r600_shader.c 
b/src/gallium/drivers/r600/r600_shader.c
index 33eb5accea..4c0d554d1a 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -8698,6 +8698,33 @@ static int tgsi_atomic_op_gds(struct r600_shader_ctx 
*ctx)
        if (r)
                return r;
 
+       if (gds_op == FETCH_OP_GDS_CMP_XCHG_RET) {
+               if (inst->Src[3].Register.File == TGSI_FILE_IMMEDIATE) {
+                       int value = (ctx->literals[4 * 
inst->Src[3].Register.Index + inst->Src[3].Register.SwizzleX]);
+                       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+                       alu.op = ALU_OP1_MOV;
+                       alu.dst.sel = ctx->temp_reg;
+                       alu.dst.chan = is_cm ? 2 : 1;
+                       alu.src[0].sel = V_SQ_ALU_SRC_LITERAL;
+                       alu.src[0].value = value;
+                       alu.last = 1;
+                       alu.dst.write = 1;
+                       r = r600_bytecode_add_alu(ctx->bc, &alu);
+                       if (r)
+                               return r;
+               } else {
+                       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+                       alu.op = ALU_OP1_MOV;
+                       alu.dst.sel = ctx->temp_reg;
+                       alu.dst.chan = is_cm ? 2 : 1;
+                       r600_bytecode_src(&alu.src[0], &ctx->src[3], 0);
+                       alu.last = 1;
+                       alu.dst.write = 1;
+                       r = r600_bytecode_add_alu(ctx->bc, &alu);
+                       if (r)
+                               return r;
+               }
+       }
        if (inst->Src[2].Register.File == TGSI_FILE_IMMEDIATE) {
                int value = (ctx->literals[4 * inst->Src[2].Register.Index + 
inst->Src[2].Register.SwizzleX]);
                int abs_value = abs(value);
@@ -8737,7 +8764,10 @@ static int tgsi_atomic_op_gds(struct r600_shader_ctx 
*ctx)
        gds.src_gpr2 = 0;
        gds.src_sel_x = is_cm ? 0 : 4;
        gds.src_sel_y = is_cm ? 1 : 0;
-       gds.src_sel_z = 7;
+       if (gds_op == FETCH_OP_GDS_CMP_XCHG_RET)
+               gds.src_sel_z = is_cm ? 2 : 1;
+       else
+               gds.src_sel_z = 7;
        gds.dst_sel_x = 0;
        gds.dst_sel_y = 7;
        gds.dst_sel_z = 7;
-- 
2.14.3

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