[src/trunk]: src/sys/dev/nvmm/x86 Micro-optimize: use pushq instead of pushw....

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3668fd93acaa
branches:  trunk
changeset: 937205:3668fd93acaa
user:      maxv <maxv%NetBSD.org@localhost>
date:      Tue Aug 11 15:48:42 2020 +0000

description:
Micro-optimize: use pushq instead of pushw. To avoid LCP stalls and
unaligned stack accesses.

diffstat:

 sys/dev/nvmm/x86/nvmm_x86_svmfunc.S |  10 +++++-----
 sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S |   6 +++---
 2 files changed, 8 insertions(+), 8 deletions(-)

diffs (57 lines):

diff -r ad0a49279146 -r 3668fd93acaa sys/dev/nvmm/x86/nvmm_x86_svmfunc.S
--- a/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S       Tue Aug 11 15:35:17 2020 +0000
+++ b/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S       Tue Aug 11 15:48:42 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: nvmm_x86_svmfunc.S,v 1.4 2020/07/19 06:36:37 maxv Exp $        */
+/*     $NetBSD: nvmm_x86_svmfunc.S,v 1.5 2020/08/11 15:48:42 maxv Exp $        */
 
 /*
  * Copyright (c) 2018-2020 The NetBSD Foundation, Inc.
@@ -75,10 +75,10 @@
 
 #define HOST_SAVE_TR           \
        strw    %ax             ;\
-       pushw   %ax
+       pushq   %rax
 
 #define HOST_RESTORE_TR                                \
-       popw    %ax                             ;\
+       popq    %rax                            ;\
        movzwq  %ax,%rdx                        ;\
        movq    CPUVAR(GDT),%rax                ;\
        andq    $~0x0200,4(%rax,%rdx, 1)        ;\
@@ -86,10 +86,10 @@
 
 #define HOST_SAVE_LDT          \
        sldtw   %ax             ;\
-       pushw   %ax
+       pushq   %rax
 
 #define HOST_RESTORE_LDT       \
-       popw    %ax             ;\
+       popq    %rax            ;\
        lldtw   %ax
 
 /*
diff -r ad0a49279146 -r 3668fd93acaa sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S
--- a/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S       Tue Aug 11 15:35:17 2020 +0000
+++ b/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S       Tue Aug 11 15:48:42 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: nvmm_x86_vmxfunc.S,v 1.4 2020/07/19 06:36:37 maxv Exp $        */
+/*     $NetBSD: nvmm_x86_vmxfunc.S,v 1.5 2020/08/11 15:48:42 maxv Exp $        */
 
 /*
  * Copyright (c) 2018-2020 The NetBSD Foundation, Inc.
@@ -100,10 +100,10 @@
 
 #define HOST_SAVE_LDT          \
        sldtw   %ax             ;\
-       pushw   %ax
+       pushq   %rax
 
 #define HOST_RESTORE_LDT       \
-       popw    %ax             ;\
+       popq    %rax            ;\
        lldtw   %ax
 
 /*