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authorSamuel Pitoiset <[email protected]>2019-07-10 15:18:56 +0200
committerSamuel Pitoiset <[email protected]>2019-07-10 23:36:57 +0200
commitc4ab33378a8f4a919b17996a796bad54b86d8a5f (patch)
treee19a03ddbf04e1eb75632c539f39aa72c052e754
parentac0edc369cbffcf39a61807e4720636e1d569efd (diff)
radv: add a new function for exporting VS outputs
Signed-off-by: Samuel Pitoiset <[email protected]> Reviewed-by: Bas Nieuwenhuizen <[email protected]>
-rw-r--r--src/amd/vulkan/radv_nir_to_llvm.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/src/amd/vulkan/radv_nir_to_llvm.c b/src/amd/vulkan/radv_nir_to_llvm.c
index fc598222fcf..ba0fb557266 100644
--- a/src/amd/vulkan/radv_nir_to_llvm.c
+++ b/src/amd/vulkan/radv_nir_to_llvm.c
@@ -2750,6 +2750,134 @@ radv_build_param_exports(struct radv_shader_context *ctx,
outinfo->param_exports = param_count;
}
+/* Generate export instructions for hardware VS shader stage or NGG GS stage
+ * (position and parameter data only).
+ */
+static void
+radv_llvm_export_vs(struct radv_shader_context *ctx,
+ struct radv_shader_output_values *outputs,
+ unsigned noutput,
+ struct radv_vs_output_info *outinfo,
+ bool export_clip_dists)
+{
+ LLVMValueRef psize_value = NULL, layer_value = NULL, viewport_value = NULL;
+ struct ac_export_args pos_args[4] = {};
+ unsigned pos_idx, index;
+ int i;
+
+ /* Build position exports */
+ for (i = 0; i < noutput; i++) {
+ switch (outputs[i].slot_name) {
+ case VARYING_SLOT_POS:
+ si_llvm_init_export_args(ctx, outputs[i].values, 0xf,
+ V_008DFC_SQ_EXP_POS, &pos_args[0]);
+ break;
+ case VARYING_SLOT_PSIZ:
+ psize_value = outputs[i].values[0];
+ break;
+ case VARYING_SLOT_LAYER:
+ layer_value = outputs[i].values[0];
+ break;
+ case VARYING_SLOT_VIEWPORT:
+ viewport_value = outputs[i].values[0];
+ break;
+ case VARYING_SLOT_CLIP_DIST0:
+ case VARYING_SLOT_CLIP_DIST1:
+ index = 2 + outputs[i].slot_index;
+ si_llvm_init_export_args(ctx, outputs[i].values, 0xf,
+ V_008DFC_SQ_EXP_POS + index,
+ &pos_args[index]);
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* We need to add the position output manually if it's missing. */
+ if (!pos_args[0].out[0]) {
+ pos_args[0].enabled_channels = 0xf; /* writemask */
+ pos_args[0].valid_mask = 0; /* EXEC mask */
+ pos_args[0].done = 0; /* last export? */
+ pos_args[0].target = V_008DFC_SQ_EXP_POS;
+ pos_args[0].compr = 0; /* COMPR flag */
+ pos_args[0].out[0] = ctx->ac.f32_0; /* X */
+ pos_args[0].out[1] = ctx->ac.f32_0; /* Y */
+ pos_args[0].out[2] = ctx->ac.f32_0; /* Z */
+ pos_args[0].out[3] = ctx->ac.f32_1; /* W */
+ }
+
+ if (outinfo->writes_pointsize ||
+ outinfo->writes_layer ||
+ outinfo->writes_viewport_index) {
+ pos_args[1].enabled_channels = ((outinfo->writes_pointsize == true ? 1 : 0) |
+ (outinfo->writes_layer == true ? 4 : 0));
+ pos_args[1].valid_mask = 0;
+ pos_args[1].done = 0;
+ pos_args[1].target = V_008DFC_SQ_EXP_POS + 1;
+ pos_args[1].compr = 0;
+ pos_args[1].out[0] = ctx->ac.f32_0; /* X */
+ pos_args[1].out[1] = ctx->ac.f32_0; /* Y */
+ pos_args[1].out[2] = ctx->ac.f32_0; /* Z */
+ pos_args[1].out[3] = ctx->ac.f32_0; /* W */
+
+ if (outinfo->writes_pointsize == true)
+ pos_args[1].out[0] = psize_value;
+ if (outinfo->writes_layer == true)
+ pos_args[1].out[2] = layer_value;
+ if (outinfo->writes_viewport_index == true) {
+ if (ctx->options->chip_class >= GFX9) {
+ /* GFX9 has the layer in out.z[10:0] and the viewport
+ * index in out.z[19:16].
+ */
+ LLVMValueRef v = viewport_value;
+ v = ac_to_integer(&ctx->ac, v);
+ v = LLVMBuildShl(ctx->ac.builder, v,
+ LLVMConstInt(ctx->ac.i32, 16, false),
+ "");
+ v = LLVMBuildOr(ctx->ac.builder, v,
+ ac_to_integer(&ctx->ac, pos_args[1].out[2]), "");
+
+ pos_args[1].out[2] = ac_to_float(&ctx->ac, v);
+ pos_args[1].enabled_channels |= 1 << 2;
+ } else {
+ pos_args[1].out[3] = viewport_value;
+ pos_args[1].enabled_channels |= 1 << 3;
+ }
+ }
+ }
+
+ for (i = 0; i < 4; i++) {
+ if (pos_args[i].out[0])
+ outinfo->pos_exports++;
+ }
+
+ /* Navi10-14 skip POS0 exports if EXEC=0 and DONE=0, causing a hang.
+ * Setting valid_mask=1 prevents it and has no other effect.
+ */
+ if (ctx->ac.family == CHIP_NAVI10 ||
+ ctx->ac.family == CHIP_NAVI12 ||
+ ctx->ac.family == CHIP_NAVI14)
+ pos_args[0].valid_mask = 1;
+
+ pos_idx = 0;
+ for (i = 0; i < 4; i++) {
+ if (!pos_args[i].out[0])
+ continue;
+
+ /* Specify the target we are exporting */
+ pos_args[i].target = V_008DFC_SQ_EXP_POS + pos_idx++;
+
+ if (pos_idx == outinfo->pos_exports)
+ /* Specify that this is the last export */
+ pos_args[i].done = 1;
+
+ ac_build_export(&ctx->ac, &pos_args[i]);
+ }
+
+ /* Build parameter exports */
+ radv_build_param_exports(ctx, outputs, noutput, outinfo, export_clip_dists);
+}
+
static void
handle_vs_outputs_post(struct radv_shader_context *ctx,
bool export_prim_id,