vpx/vpx_ports/float_control_word.asm
Johann 726b021a12 reland "use intrinsics for 'emms'"
Only target 32bit builds. Visual Studio does not define _mm_empty for
64bit configurations.

Rename emms.asm and remove from 32 bit builds to avoid empty file
warnings.

Don't check register state on 64bit builds.

BUG=webm:1500

This reverts commit 60beb781c140b61c1957abd2a6717d2e9a831933.

Change-Id: I5ac4cf6c67249ff24f7da19792144de20527bfce
2018-03-19 17:11:55 -07:00

34 lines
788 B
NASM

;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
%include "vpx_ports/x86_abi_support.asm"
section .text
%if LIBVPX_YASM_WIN64
global sym(vpx_winx64_fldcw) PRIVATE
sym(vpx_winx64_fldcw):
sub rsp, 8
mov [rsp], rcx ; win x64 specific
fldcw [rsp]
add rsp, 8
ret
global sym(vpx_winx64_fstcw) PRIVATE
sym(vpx_winx64_fstcw):
sub rsp, 8
fstcw [rsp]
mov rax, [rsp]
add rsp, 8
ret
%endif