radeonsi: Handle TGSI_SEMANTIC_CLIPVERTEX
17 more little piglits.
NOTE: This is a candidate for the 9.1 branch.
diff --git a/src/gallium/drivers/radeonsi/radeonsi_shader.c b/src/gallium/drivers/radeonsi/radeonsi_shader.c
index e6ed545..484f7ec 100644
--- a/src/gallium/drivers/radeonsi/radeonsi_shader.c
+++ b/src/gallium/drivers/radeonsi/radeonsi_shader.c
@@ -554,6 +554,64 @@
}
}
+static void si_llvm_emit_clipvertex(struct lp_build_tgsi_context * bld_base,
+ unsigned index)
+{
+ struct si_shader_context *si_shader_ctx = si_shader_context(bld_base);
+ struct lp_build_context *base = &bld_base->base;
+ struct lp_build_context *uint = &si_shader_ctx->radeon_bld.soa.bld_base.uint_bld;
+ LLVMValueRef args[9];
+ unsigned reg_index;
+ unsigned chan;
+ unsigned const_chan;
+ LLVMValueRef out_elts[4];
+ LLVMValueRef base_elt;
+ LLVMValueRef ptr = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, SI_PARAM_CONST);
+ LLVMValueRef const_resource = build_indexed_load(si_shader_ctx, ptr, uint->one);
+
+ for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
+ LLVMValueRef out_ptr = si_shader_ctx->radeon_bld.soa.outputs[index][chan];
+ out_elts[chan] = LLVMBuildLoad(base->gallivm->builder, out_ptr, "");
+ }
+
+ for (reg_index = 0; reg_index < 2; reg_index ++) {
+ args[5] =
+ args[6] =
+ args[7] =
+ args[8] = lp_build_const_float(base->gallivm, 0.0f);
+
+ /* Compute dot products of position and user clip plane vectors */
+ for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
+ for (const_chan = 0; const_chan < TGSI_NUM_CHANNELS; const_chan++) {
+ args[0] = const_resource;
+ args[1] = lp_build_const_int32(base->gallivm,
+ ((reg_index * 4 + chan) * 4 +
+ const_chan) * 4);
+ base_elt = build_intrinsic(base->gallivm->builder,
+ "llvm.SI.load.const",
+ base->elem_type,
+ args, 2,
+ LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
+ args[5 + chan] =
+ lp_build_add(base, args[5 + chan],
+ lp_build_mul(base, base_elt,
+ out_elts[const_chan]));
+ }
+ }
+
+ args[0] = lp_build_const_int32(base->gallivm, 0xf);
+ args[1] = uint->zero;
+ args[2] = uint->zero;
+ args[3] = lp_build_const_int32(base->gallivm,
+ V_008DFC_SQ_EXP_POS + 2 + reg_index);
+ args[4] = uint->zero;
+ lp_build_intrinsic(base->gallivm->builder,
+ "llvm.SI.export",
+ LLVMVoidTypeInContext(base->gallivm->context),
+ args, 9);
+ }
+}
+
/* XXX: This is partially implemented for VS only at this point. It is not complete */
static void si_llvm_emit_epilogue(struct lp_build_tgsi_context * bld_base)
{
@@ -642,6 +700,10 @@
color_count++;
}
break;
+ case TGSI_SEMANTIC_CLIPVERTEX:
+ si_llvm_emit_clipvertex(bld_base, index);
+ shader->clip_dist_write = 0xFF;
+ continue;
case TGSI_SEMANTIC_FOG:
case TGSI_SEMANTIC_GENERIC:
target = V_008DFC_SQ_EXP_PARAM + param_count;