forked from OSchip/llvm-project
31 lines
947 B
ArmAsm
31 lines
947 B
ArmAsm
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
|
|
#include "../assembly.h"
|
|
|
|
// float __floatdixf(di_int a);
|
|
|
|
#ifdef __i386__
|
|
|
|
// This routine has some extra memory traffic, loading the 64-bit input via two
|
|
// 32-bit loads, then immediately storing it back to the stack via a single 64-bit
|
|
// store. This is to avoid a write-small, read-large stall.
|
|
// However, if callers of this routine can be safely assumed to store the argument
|
|
// via a 64-bt store, this is unnecessary memory traffic, and should be avoided.
|
|
// It can be turned off by defining the TRUST_CALLERS_USE_64_BIT_STORES macro.
|
|
|
|
.text
|
|
.align 4
|
|
DEFINE_COMPILERRT_FUNCTION(__floatdixf)
|
|
#ifndef TRUST_CALLERS_USE_64_BIT_STORES
|
|
movd 4(%esp), %xmm0
|
|
movd 8(%esp), %xmm1
|
|
punpckldq %xmm1, %xmm0
|
|
movq %xmm0, 4(%esp)
|
|
#endif
|
|
fildll 4(%esp)
|
|
ret
|
|
END_COMPILERRT_FUNCTION(__floatdixf)
|
|
|
|
#endif // __i386__
|