1 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
2 // See https://llvm.org/LICENSE.txt for license information.
3 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5 #include "../assembly.h"
7 // float __floatdixf(di_int a);
11 // This routine has some extra memory traffic, loading the 64-bit input via two
12 // 32-bit loads, then immediately storing it back to the stack via a single 64-bit
13 // store. This is to avoid a write-small, read-large stall.
14 // However, if callers of this routine can be safely assumed to store the argument
15 // via a 64-bt store, this is unnecessary memory traffic, and should be avoided.
16 // It can be turned off by defining the TRUST_CALLERS_USE_64_BIT_STORES macro.
20 DEFINE_COMPILERRT_FUNCTION(__floatdixf)
21 #ifndef TRUST_CALLERS_USE_64_BIT_STORES
24 punpckldq %xmm1, %xmm0
29 END_COMPILERRT_FUNCTION(__floatdixf)
33 NO_EXEC_STACK_DIRECTIVE