Use movdqu instead of movdqa for saving xmm registers

The stack is not guaranteed to be 16-byte aligned on win64.

diff --git a/ChangeLog b/ChangeLog
index 9392a7547d4720edfdb58123ae68212bdbabea57..0a30fbd4966174846804918846cd86ab25dca609 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,9 @@
 2013-04-23  Niels Möller  <nisse@lysator.liu.se>
 
        From Martin Storsjö:
+       * x86_64/machine.m4 (W64_ENTRY): Use movdqu instead of movdqa for
+       saving xmm registers, since the stack is not guaranteed to be
+       16-byte aligned on win64.
        * Makefile.in: Consistently use EXEEXT_FOR_BUILD.
 
 2013-04-21  Niels Möller  <nisse@lysator.liu.se>

diff --git a/x86_64/machine.m4 b/x86_64/machine.m4
index dc23dde8caec06d84b052288feffc1223ab7de58..d5d5b37cc3a139fb36cff05371b5f3b91da4ff0d 100644 (file)
--- a/x86_64/machine.m4
+++ b/x86_64/machine.m4
@@ -71,34 +71,34 @@ define(<W64_ENTRY>, <
   ifelse(W64_ABI,yes,[
     ifelse(eval($2 > 6), 1, [
       sub      [$]eval(8 + 16*($2 - 6)), %rsp
-      movdqa   %xmm6, 0(%rsp)
+      movdqu   %xmm6, 0(%rsp)
     ])
     ifelse(eval($2 > 7), 1, [
-      movdqa   %xmm7, 16(%rsp)
+      movdqu   %xmm7, 16(%rsp)
     ])
     ifelse(eval($2 > 8), 1, [
-      movdqa   %xmm8, 32(%rsp)
+      movdqu   %xmm8, 32(%rsp)
     ])
     ifelse(eval($2 > 9), 1, [
-      movdqa   %xmm9, 48(%rsp)
+      movdqu   %xmm9, 48(%rsp)
     ])
     ifelse(eval($2 > 10), 1, [
-      movdqa   %xmm10, 64(%rsp)
+      movdqu   %xmm10, 64(%rsp)
     ])
     ifelse(eval($2 > 11), 1, [
-      movdqa   %xmm11, 80(%rsp)
+      movdqu   %xmm11, 80(%rsp)
     ])
     ifelse(eval($2 > 12), 1, [
-      movdqa   %xmm12, 96(%rsp)
+      movdqu   %xmm12, 96(%rsp)
     ])
     ifelse(eval($2 > 13), 1, [
-      movdqa   %xmm13, 112(%rsp)
+      movdqu   %xmm13, 112(%rsp)
     ])
     ifelse(eval($2 > 14), 1, [
-      movdqa   %xmm14, 128(%rsp)
+      movdqu   %xmm14, 128(%rsp)
     ])
     ifelse(eval($2 > 15), 1, [
-      movdqa   %xmm15, 144(%rsp)
+      movdqu   %xmm15, 144(%rsp)
     ])
     ifelse(eval($1 >= 1), 1, [
       push     %rdi
@@ -133,34 +133,34 @@ define(<W64_EXIT>, <
       pop      %rdi
     ])
     ifelse(eval($2 > 15), 1, [
-      movdqa   144(%rsp), %xmm15
+      movdqu   144(%rsp), %xmm15
     ])
     ifelse(eval($2 > 14), 1, [
-      movdqa   128(%rsp), %xmm14
+      movdqu   128(%rsp), %xmm14
     ])
     ifelse(eval($2 > 13), 1, [
-      movdqa   112(%rsp), %xmm13
+      movdqu   112(%rsp), %xmm13
     ])
     ifelse(eval($2 > 12), 1, [
-      movdqa   96(%rsp), %xmm12
+      movdqu   96(%rsp), %xmm12
     ])
     ifelse(eval($2 > 11), 1, [
-      movdqa   80(%rsp), %xmm11
+      movdqu   80(%rsp), %xmm11
     ])
     ifelse(eval($2 > 10), 1, [
-      movdqa   64(%rsp), %xmm10
+      movdqu   64(%rsp), %xmm10
     ])
     ifelse(eval($2 > 9), 1, [
-      movdqa   48(%rsp), %xmm9
+      movdqu   48(%rsp), %xmm9
     ])
     ifelse(eval($2 > 8), 1, [
-      movdqa   32(%rsp), %xmm8
+      movdqu   32(%rsp), %xmm8
     ])
     ifelse(eval($2 > 7), 1, [
-      movdqa   16(%rsp), %xmm7
+      movdqu   16(%rsp), %xmm7
     ])
     ifelse(eval($2 > 6), 1, [
-      movdqa   0(%rsp), %xmm6
+      movdqu   0(%rsp), %xmm6
       add      [$]eval(8 + 16*($2 - 6)), %rsp
     ])
   ])