diff options
Diffstat (limited to 'src/llvm_backend_proc.cpp')
| -rw-r--r-- | src/llvm_backend_proc.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/llvm_backend_proc.cpp b/src/llvm_backend_proc.cpp index e5c04852c..b41f4723c 100644 --- a/src/llvm_backend_proc.cpp +++ b/src/llvm_backend_proc.cpp @@ -1564,6 +1564,34 @@ gb_internal lbValue lb_build_builtin_simd_proc(lbProcedure *p, Ast *expr, TypeAn return res; } + case BuiltinProc_simd_extract_lsbs: + case BuiltinProc_simd_extract_msbs: + { + Type *vt = arg0.type; + GB_ASSERT(vt->kind == Type_SimdVector); + + i64 elem_bits = 8*type_size_of(elem); + i64 num_elems = get_array_type_count(vt); + + LLVMValueRef broadcast_value = arg0.value; + if (builtin_id == BuiltinProc_simd_extract_msbs) { + LLVMTypeRef word_type = lb_type(m, elem); + LLVMValueRef shift_value = llvm_splat_int(num_elems, word_type, elem_bits - 1); + broadcast_value = LLVMBuildAShr(p->builder, broadcast_value, shift_value, ""); + } + + LLVMTypeRef bitvec_type = LLVMVectorType(LLVMInt1TypeInContext(m->ctx), (unsigned)num_elems); + LLVMValueRef bitvec_value = LLVMBuildTrunc(p->builder, broadcast_value, bitvec_type, ""); + + LLVMTypeRef mask_type = LLVMIntTypeInContext(m->ctx, (unsigned)num_elems); + LLVMValueRef mask_value = LLVMBuildBitCast(p->builder, bitvec_value, mask_type, ""); + + LLVMTypeRef result_type = lb_type(m, res.type); + res.value = LLVMBuildZExtOrBitCast(p->builder, mask_value, result_type, ""); + + return res; + } + case BuiltinProc_simd_shuffle: { |