r600g: PV/PS have cycle restrictions in scalar operations

In the R600 ISA document:
Section 4.7.5 Cycle restrictions for the ALU.trans states that
PV/PS have cycle restrictions wrt constants.

This is part of a fix for the LIT tests

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c
index 7e854b1..4cdd1ed 100644 (file)
--- a/src/gallium/drivers/r600/r600_asm.c
+++ b/src/gallium/drivers/r600/r600_asm.c
@@ -709,8 +709,12 @@ static int check_scalar(struct r600_bc *bc, struct r600_bc_alu *alu,
                        if (r)
                                return r;
                }
-               // Constants already processed
-               // No restrictions on PV, PS
+               // PV PS restrictions
+               if (const_count && (sel == 254 || sel == 255)) {
+                       cycle = cycle_for_bank_swizzle_scl[bank_swizzle][src];
+                       if (cycle < const_count)
+                               return -1;
+               }
        }
        return 0;
 }