+ if (ctx->rasterizer->clip_plane_enable ||
+ swr_vs->info.base.culldist_writemask) {
+ unsigned clip_mask = ctx->rasterizer->clip_plane_enable;
+
+ unsigned cv = 0;
+ if (swr_vs->info.base.writes_clipvertex) {
+ cv = 1 + locate_linkage(TGSI_SEMANTIC_CLIPVERTEX, 0,
+ &swr_vs->info.base);
+ } else {
+ for (int i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
+ if (swr_vs->info.base.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
+ swr_vs->info.base.output_semantic_index[i] == 0) {
+ cv = i;
+ break;
+ }
+ }
+ }
+ LLVMValueRef cx = LLVMBuildLoad(gallivm->builder, outputs[cv][0], "");
+ LLVMValueRef cy = LLVMBuildLoad(gallivm->builder, outputs[cv][1], "");
+ LLVMValueRef cz = LLVMBuildLoad(gallivm->builder, outputs[cv][2], "");
+ LLVMValueRef cw = LLVMBuildLoad(gallivm->builder, outputs[cv][3], "");
+
+ for (unsigned val = 0; val < PIPE_MAX_CLIP_PLANES; val++) {
+ // clip distance overrides user clip planes
+ if ((swr_vs->info.base.clipdist_writemask & clip_mask & (1 << val)) ||
+ ((swr_vs->info.base.culldist_writemask << swr_vs->info.base.num_written_clipdistance) & (1 << val))) {
+ unsigned cv = 1 + locate_linkage(TGSI_SEMANTIC_CLIPDIST, val < 4 ? 0 : 1,
+ &swr_vs->info.base);
+ if (val < 4) {
+ LLVMValueRef dist = LLVMBuildLoad(gallivm->builder, outputs[cv][val], "");
+ STORE(unwrap(dist), vtxOutput, {0, 0, VERTEX_CLIPCULL_DIST_LO_SLOT, val});
+ } else {
+ LLVMValueRef dist = LLVMBuildLoad(gallivm->builder, outputs[cv][val - 4], "");
+ STORE(unwrap(dist), vtxOutput, {0, 0, VERTEX_CLIPCULL_DIST_HI_SLOT, val - 4});
+ }
+ continue;
+ }
+
+ if (!(clip_mask & (1 << val)))
+ continue;
+
+ Value *px = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 0}));
+ Value *py = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 1}));
+ Value *pz = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 2}));
+ Value *pw = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 3}));
+ Value *dist = FADD(FMUL(unwrap(cx), VBROADCAST(px)),
+ FADD(FMUL(unwrap(cy), VBROADCAST(py)),
+ FADD(FMUL(unwrap(cz), VBROADCAST(pz)),
+ FMUL(unwrap(cw), VBROADCAST(pw)))));
+
+ if (val < 4)
+ STORE(dist, vtxOutput, {0, 0, VERTEX_CLIPCULL_DIST_LO_SLOT, val});
+ else
+ STORE(dist, vtxOutput, {0, 0, VERTEX_CLIPCULL_DIST_HI_SLOT, val - 4});
+ }
+ }
+