From: Dave Airlie <airlied@redhat.com>
Date: Sat, 23 Apr 2011 22:30:08 +0000 (+1000)
Subject: r600g: PV/PS have cycle restrictions in scalar operations
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=22d5a71e4dedfc047e1a14082b7d0d287cfe910e;p=mesa.git

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 7e854b1b81d..4cdd1ed698f 100644
--- 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;
 }