aboutsummaryrefslogtreecommitdiffstats
path: root/src/gallium/drivers/r600/r600_shader.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/drivers/r600/r600_shader.c')
-rw-r--r--src/gallium/drivers/r600/r600_shader.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 6dbca505cbe..f3e21874653 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -5490,7 +5490,7 @@ static int tgsi_opdst(struct r600_shader_ctx *ctx)
return 0;
}
-static int emit_logic_pred(struct r600_shader_ctx *ctx, int opcode)
+static int emit_logic_pred(struct r600_shader_ctx *ctx, int opcode, int alu_type)
{
struct r600_bytecode_alu alu;
int r;
@@ -5510,7 +5510,7 @@ static int emit_logic_pred(struct r600_shader_ctx *ctx, int opcode)
alu.last = 1;
- r = r600_bytecode_add_alu_type(ctx->bc, &alu, CF_OP_ALU_PUSH_BEFORE);
+ r = r600_bytecode_add_alu_type(ctx->bc, &alu, alu_type);
if (r)
return r;
return 0;
@@ -5730,7 +5730,19 @@ static void break_loop_on_flag(struct r600_shader_ctx *ctx, unsigned fc_sp)
static int tgsi_if(struct r600_shader_ctx *ctx)
{
- emit_logic_pred(ctx, ALU_OP2_PRED_SETNE_INT);
+ int alu_type = CF_OP_ALU_PUSH_BEFORE;
+
+ /* There is a hardware bug on Cayman where a BREAK/CONTINUE followed by
+ * LOOP_STARTxxx for nested loops may put the branch stack into a state
+ * such that ALU_PUSH_BEFORE doesn't work as expected. Workaround this
+ * by replacing the ALU_PUSH_BEFORE with a PUSH + ALU */
+ if (ctx->bc->chip_class == CAYMAN && ctx->bc->stack.loop > 1) {
+ r600_bytecode_add_cfinst(ctx->bc, CF_OP_PUSH);
+ ctx->bc->cf_last->cf_addr = ctx->bc->cf_last->id + 2;
+ alu_type = CF_OP_ALU;
+ }
+
+ emit_logic_pred(ctx, ALU_OP2_PRED_SETNE_INT, alu_type);
r600_bytecode_add_cfinst(ctx->bc, CF_OP_JUMP);