From cef698afd63339a8ab3d684f1de6e10914ed3796 Mon Sep 17 00:00:00 2001 From: gingerBill Date: Thu, 1 Apr 2021 14:36:06 +0100 Subject: Implement fixed-point arithmetic intrinsics for -llvm-api backend --- src/llvm_backend.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) (limited to 'src/llvm_backend.cpp') diff --git a/src/llvm_backend.cpp b/src/llvm_backend.cpp index efa19a3bf..a4185f01a 100644 --- a/src/llvm_backend.cpp +++ b/src/llvm_backend.cpp @@ -9192,6 +9192,52 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv, case BuiltinProc_type_hasher_proc: return lb_get_hasher_proc_for_type(p->module, ce->args[0]->tav.type); + + case BuiltinProc_fixed_point_mul: + case BuiltinProc_fixed_point_div: + case BuiltinProc_fixed_point_mul_sat: + case BuiltinProc_fixed_point_div_sat: + { + lbValue x = lb_build_expr(p, ce->args[0]); + lbValue y = lb_build_expr(p, ce->args[1]); + lbValue scale = lb_build_expr(p, ce->args[2]); + x = lb_emit_conv(p, x, tv.type); + y = lb_emit_conv(p, y, tv.type); + scale = lb_emit_conv(p, scale, tv.type); + + char const *name = nullptr; + if (is_type_unsigned(tv.type)) { + switch (id) { + case BuiltinProc_fixed_point_mul: name = "llvm.umul.fix"; break; + case BuiltinProc_fixed_point_div: name = "llvm.udiv.fix"; break; + case BuiltinProc_fixed_point_mul_sat: name = "llvm.umul.fix.sat"; break; + case BuiltinProc_fixed_point_div_sat: name = "llvm.udiv.fix.sat"; break; + } + } else { + switch (id) { + case BuiltinProc_fixed_point_mul: name = "llvm.imul.fix"; break; + case BuiltinProc_fixed_point_div: name = "llvm.idiv.fix"; break; + case BuiltinProc_fixed_point_mul_sat: name = "llvm.imul.fix.sat"; break; + case BuiltinProc_fixed_point_div_sat: name = "llvm.idiv.fix.sat"; break; + } + } + GB_ASSERT(name != nullptr); + + unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name)); + LLVMTypeRef types[1] = {}; + types[0] = lb_type(p->module, tv.type); + + LLVMValueRef args[3] = {}; + args[0] = x.value; + args[1] = y.value; + args[2] = scale.value; + + LLVMValueRef ip = LLVMGetIntrinsicDeclaration(p->module->mod, id, types, gb_count_of(types)); + lbValue res = {}; + res.type = tv.type; + res.value = LLVMBuildCall(p->builder, ip, args, gb_count_of(args), ""); + return res; + } } GB_PANIC("Unhandled built-in procedure %.*s", LIT(builtin_procs[id].name)); -- cgit v1.2.3