radeonsi/gfx9: add a workaround for 1D depth textures

The same workaround is used by Vulkan.

Reviewed-by: Nicolai Hähnle <[email protected]>

2 files changed, 73 insertions, 23 deletions

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 20d6bd732b2..20686bd331c 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -3297,6 +3297,7 @@ static LLVMValueRef image_fetch_coords(
 		const struct tgsi_full_instruction *inst,
 		unsigned src)
 {
+	struct si_shader_context *ctx = si_shader_context(bld_base);
 	struct gallivm_state *gallivm = bld_base->base.gallivm;
 	LLVMBuilderRef builder = gallivm->builder;
 	unsigned target = inst->Memory.Texture;
@@ -3311,6 +3312,17 @@ static LLVMValueRef image_fetch_coords(
 		coords[chan] = tmp;
 	}
 
+	/* 1D textures are allocated and used as 2D on GFX9. */
+	if (ctx->screen->b.chip_class >= GFX9) {
+		if (target == TGSI_TEXTURE_1D) {
+			coords[1] = bld_base->uint_bld.zero;
+			num_coords++;
+		} else if (target == TGSI_TEXTURE_1D_ARRAY) {
+			coords[2] = coords[1];
+			coords[1] = bld_base->uint_bld.zero;
+		}
+	}
+
 	if (num_coords == 1)
 		return coords[0];
 
@@ -4440,11 +4452,12 @@ static void tex_fetch_args(
 
 	/* Pack user derivatives */
 	if (opcode == TGSI_OPCODE_TXD) {
-		int param, num_src_deriv_channels;
+		int param, num_src_deriv_channels, num_dst_deriv_channels;
 
 		switch (target) {
 		case TGSI_TEXTURE_3D:
 			num_src_deriv_channels = 3;
+			num_dst_deriv_channels = 3;
 			num_deriv_channels = 3;
 			break;
 		case TGSI_TEXTURE_2D:
@@ -4454,6 +4467,7 @@ static void tex_fetch_args(
 		case TGSI_TEXTURE_2D_ARRAY:
 		case TGSI_TEXTURE_SHADOW2D_ARRAY:
 			num_src_deriv_channels = 2;
+			num_dst_deriv_channels = 2;
 			num_deriv_channels = 2;
 			break;
 		case TGSI_TEXTURE_CUBE:
@@ -4462,6 +4476,7 @@ static void tex_fetch_args(
 		case TGSI_TEXTURE_SHADOWCUBE_ARRAY:
 			/* Cube derivatives will be converted to 2D. */
 			num_src_deriv_channels = 3;
+			num_dst_deriv_channels = 3;
 			num_deriv_channels = 2;
 			break;
 		case TGSI_TEXTURE_1D:
@@ -4469,16 +4484,31 @@ static void tex_fetch_args(
 		case TGSI_TEXTURE_1D_ARRAY:
 		case TGSI_TEXTURE_SHADOW1D_ARRAY:
 			num_src_deriv_channels = 1;
-			num_deriv_channels = 1;
+
+			/* 1D textures are allocated and used as 2D on GFX9. */
+			if (ctx->screen->b.chip_class >= GFX9) {
+				num_dst_deriv_channels = 2;
+				num_deriv_channels = 2;
+			} else {
+				num_dst_deriv_channels = 1;
+				num_deriv_channels = 1;
+			}
 			break;
 		default:
 			unreachable("invalid target");
 		}
 
-		for (param = 0; param < 2; param++)
+		for (param = 0; param < 2; param++) {
 			for (chan = 0; chan < num_src_deriv_channels; chan++)
-				derivs[param * num_src_deriv_channels + chan] =
+				derivs[param * num_dst_deriv_channels + chan] =
 					lp_build_emit_fetch(bld_base, inst, param+1, chan);
+
+			/* Fill in the rest with zeros. */
+			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 ||
@@ -4502,6 +4532,27 @@ static void tex_fetch_args(
 	if (num_coords > 2)
 		address[count++] = coords[2];
 
+	/* 1D textures are allocated and used as 2D on GFX9. */
+	if (ctx->screen->b.chip_class >= GFX9) {
+		LLVMValueRef filler;
+
+		/* Use 0.5, so that we don't sample the border color. */
+		if (opcode == TGSI_OPCODE_TXF)
+			filler = bld_base->uint_bld.zero;
+		else
+			filler = LLVMConstReal(ctx->f32, 0.5);
+
+		if (target == TGSI_TEXTURE_1D ||
+		    target == TGSI_TEXTURE_SHADOW1D) {
+			address[count++] = filler;
+		} else if (target == TGSI_TEXTURE_1D_ARRAY ||
+			   target == TGSI_TEXTURE_SHADOW1D_ARRAY) {
+			address[count] = coords[count - 1];
+			address[count - 1] = filler;
+			count++;
+		}
+	}
+
 	/* Pack LOD or sample index */
 	if (opcode == TGSI_OPCODE_TXL || opcode == TGSI_OPCODE_TXF)
 		address[count++] = coords[3];
diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index 3e0708f9208..5d1953fe6b0 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -1665,9 +1665,11 @@ static unsigned si_tex_compare(unsigned compare)
 	}
 }
 
-static unsigned si_tex_dim(unsigned res_target, unsigned view_target,
-			   unsigned nr_samples)
+static unsigned si_tex_dim(struct si_screen *sscreen, struct r600_texture *rtex,
+			   unsigned view_target, unsigned nr_samples)
 {
+	unsigned res_target = rtex->resource.b.b.target;
+
 	if (view_target == PIPE_TEXTURE_CUBE ||
 	    view_target == PIPE_TEXTURE_CUBE_ARRAY)
 		res_target = view_target;
@@ -1676,6 +1678,17 @@ static unsigned si_tex_dim(unsigned res_target, unsigned view_target,
 		 res_target == PIPE_TEXTURE_CUBE_ARRAY)
 		res_target = PIPE_TEXTURE_2D_ARRAY;
 
+	/* GFX9 allocates 1D textures as 2D. */
+	if ((res_target == PIPE_TEXTURE_1D ||
+	     res_target == PIPE_TEXTURE_1D_ARRAY) &&
+	    sscreen->b.chip_class >= GFX9 &&
+	    rtex->surface.u.gfx9.resource_type == RADEON_RESOURCE_2D) {
+		if (res_target == PIPE_TEXTURE_1D)
+			res_target = PIPE_TEXTURE_2D;
+		else
+			res_target = PIPE_TEXTURE_2D_ARRAY;
+	}
+
 	switch (res_target) {
 	default:
 	case PIPE_TEXTURE_1D:
@@ -2210,24 +2223,10 @@ static void si_initialize_color_surface(struct si_context *sctx,
 
 	if (sctx->b.chip_class >= GFX9) {
 		unsigned mip0_depth = util_max_layer(&rtex->resource.b.b, 0);
-		unsigned type;
-
-		switch (rtex->resource.b.b.target) {
-		case PIPE_TEXTURE_1D:
-		case PIPE_TEXTURE_1D_ARRAY:
-			type = V_028C74_1D;
-			break;
-		default:
-			type = V_028C74_2D;
-			break;
-		case PIPE_TEXTURE_3D:
-			type = V_028C74_3D;
-			break;
-		}
 
 		surf->cb_color_view |= S_028C6C_MIP_LEVEL(surf->base.u.tex.level);
 		surf->cb_color_attrib |= S_028C74_MIP0_DEPTH(mip0_depth) |
-					 S_028C74_RESOURCE_TYPE(type);
+					 S_028C74_RESOURCE_TYPE(rtex->surface.u.gfx9.resource_type);
 		surf->cb_color_attrib2 = S_028C68_MIP0_WIDTH(rtex->resource.b.b.width0 - 1) |
 					 S_028C68_MIP0_HEIGHT(rtex->resource.b.b.height0 - 1) |
 					 S_028C68_MAX_MIP(rtex->resource.b.b.last_level);
@@ -3108,7 +3107,7 @@ si_make_texture_descriptor(struct si_screen *screen,
 
 		assert(res->target != PIPE_TEXTURE_3D || (first_level == 0 && last_level == 0));
 	} else {
-		type = si_tex_dim(res->target, target, res->nr_samples);
+		type = si_tex_dim(screen, tex, target, res->nr_samples);
 	}
 
 	if (type == V_008F1C_SQ_RSRC_IMG_1D_ARRAY) {
@@ -3227,7 +3226,7 @@ si_make_texture_descriptor(struct si_screen *screen,
 				 S_008F1C_DST_SEL_Y(V_008F1C_SQ_SEL_X) |
 				 S_008F1C_DST_SEL_Z(V_008F1C_SQ_SEL_X) |
 				 S_008F1C_DST_SEL_W(V_008F1C_SQ_SEL_X) |
-				 S_008F1C_TYPE(si_tex_dim(res->target, target, 0));
+				 S_008F1C_TYPE(si_tex_dim(screen, tex, target, 0));
 		fmask_state[4] = 0;
 		fmask_state[5] = S_008F24_BASE_ARRAY(first_layer);
 		fmask_state[6] = 0;