[Mesa-dev] [PATCH 1/2] radeonsi: fix array textures layer coordinate

[Nicolai Hähnle]

From: Nicolai Hähnle <nicolai.haehnle at amd.com>

Like for cube map (array) gather, we need to round to nearest on <= VI.

Fixes tests in dEQP-GLES3.functional.shaders.texture_functions.texture.*

Cc: mesa-stable at lists.freedesktop.org
---
 src/gallium/drivers/radeonsi/si_shader_tgsi_mem.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/radeonsi/si_shader_tgsi_mem.c b/src/gallium/drivers/radeonsi/si_shader_tgsi_mem.c
index d0969a7dd02..54832fc0ee4 100644
--- a/src/gallium/drivers/radeonsi/si_shader_tgsi_mem.c
+++ b/src/gallium/drivers/radeonsi/si_shader_tgsi_mem.c
@@ -1471,27 +1471,37 @@ static void tex_fetch_args(
 			for (chan = num_src_deriv_channels;
 			     chan < num_dst_deriv_channels; chan++)
 				derivs[param * num_dst_deriv_channels + chan] =
 					bld_base->base.zero;
 		}
 	}
 
 	if (target == TGSI_TEXTURE_CUBE ||
 	    target == TGSI_TEXTURE_CUBE_ARRAY ||
 	    target == TGSI_TEXTURE_SHADOWCUBE ||
-	    target == TGSI_TEXTURE_SHADOWCUBE_ARRAY)
+	    target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) {
 		ac_prepare_cube_coords(&ctx->ac,
 				       opcode == TGSI_OPCODE_TXD,
 				       target == TGSI_TEXTURE_CUBE_ARRAY ||
 				       target == TGSI_TEXTURE_SHADOWCUBE_ARRAY,
 				       opcode == TGSI_OPCODE_LODQ,
 				       coords, derivs);
+	} else if (tgsi_is_array_sampler(target) &&
+		   opcode != TGSI_OPCODE_TXF &&
+		   opcode != TGSI_OPCODE_TXF_LZ &&
+		   ctx->screen->b.chip_class <= VI) {
+		unsigned array_coord = target == TGSI_TEXTURE_1D ||
+				       target == TGSI_TEXTURE_1D_ARRAY ? 1 : 2;
+		coords[array_coord] =
+			ac_build_intrinsic(&ctx->ac, "llvm.rint.f32", ctx->f32,
+					   &coords[array_coord], 1, 0);
+	}
 
 	if (opcode == TGSI_OPCODE_TXD)
 		for (int i = 0; i < num_deriv_channels * 2; i++)
 			address[count++] = derivs[i];
 
 	/* Pack texture coordinates */
 	address[count++] = coords[0];
 	if (num_coords > 1)
 		address[count++] = coords[1];
 	if (num_coords > 2)
-- 
2.11.0