From: Kristian H. Kristensen <hoegsberg@google.com>
Date: Wed, 23 Oct 2019 02:29:07 +0000 (-0700)
Subject: freedreno/ir3: Implement tess coord intrinsic
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4915231b8a786466041f34dd3e83f31470d40dde;p=mesa.git

freedreno/ir3: Implement tess coord intrinsic

Our lowering pass made the z component unused by replacing its uses
by 1 - x - y.  The intrinsic implementation then just need to return
the x and y components.

Signed-off-by: Kristian H. Kristensen <hoegsberg@google.com>
Acked-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Rob Clark <robdclark@gmail.com>
---

diff --git a/src/freedreno/ir3/ir3_compiler_nir.c b/src/freedreno/ir3/ir3_compiler_nir.c
index 8ed5b2f91fa..b2068a35466 100644
--- a/src/freedreno/ir3/ir3_compiler_nir.c
+++ b/src/freedreno/ir3/ir3_compiler_nir.c
@@ -1394,6 +1394,18 @@ emit_intrinsic(struct ir3_context *ctx, nir_intrinsic_instr *intr)
 		dst[0] = ctx->primitive_id;
 		break;
 
+	case nir_intrinsic_load_tess_coord:
+		if (!ctx->tess_coord) {
+			ctx->tess_coord = create_input_compmask(ctx, 0, 0x3);
+			add_sysval_input_compmask(ctx, SYSTEM_VALUE_TESS_COORD,
+									  0x3, ctx->tess_coord);
+		}
+		ir3_split_dest(b, dst, ctx->tess_coord, 0, 2);
+
+		/* Unused, but ir3_put_dst() below wants to free something */
+		dst[2] = create_immed(b, 0);
+		break;
+
 	case nir_intrinsic_store_global_ir3: {
 		struct ir3_instruction *value, *addr, *offset;