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| author | Anton Samokhvalov <pg83@yandex.ru> | 2022-02-10 16:45:15 +0300 |
|---|---|---|
| committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:15 +0300 |
| commit | 72cb13b4aff9bc9cf22e49251bc8fd143f82538f (patch) | |
| tree | da2c34829458c7d4e74bdfbdf85dff449e9e7fb8 /contrib/libs/cxxsupp/builtins/i386/floatdixf.S | |
| parent | 778e51ba091dc39e7b7fcab2b9cf4dbedfb6f2b5 (diff) | |
| download | ydb-72cb13b4aff9bc9cf22e49251bc8fd143f82538f.tar.gz | |
Restoring authorship annotation for Anton Samokhvalov <pg83@yandex.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/i386/floatdixf.S')
| -rw-r--r-- | contrib/libs/cxxsupp/builtins/i386/floatdixf.S | 60 |
1 files changed, 30 insertions, 30 deletions
diff --git a/contrib/libs/cxxsupp/builtins/i386/floatdixf.S b/contrib/libs/cxxsupp/builtins/i386/floatdixf.S index 839b0434c0..2e9ee2ce61 100644 --- a/contrib/libs/cxxsupp/builtins/i386/floatdixf.S +++ b/contrib/libs/cxxsupp/builtins/i386/floatdixf.S @@ -1,30 +1,30 @@ -// 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 -.balign 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__ +// 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 +.balign 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__ |