Hello!
Attached patch detects assemblers that expects movd instead of movq
for interunit moves and adds fixup code only in case of broken
assembler.
2013-03-21 Uros Bizjak <ubiz...@gmail.com>
PR bootstrap/56656
* configure.ac (HAVE_AS_IX86_INTERUNIT_MOVQ): New test.
* configure: Regenerate.
* config.in: Regenerate.
* config/i386/i386.md (*movdf_internal): Use
HAVE_AS_IX86_INTERUNIT_MOVQ to handle broken assemblers that require
movd instead of movq mnemonic for interunit moves.
(*movdi_internal): Ditto.
Tested on x86_64-pc-linux-gnu, committed to mainline SVN.
Uros.
Index: config/i386/i386.md
===================================================================
--- config/i386/i386.md (revision 196841)
+++ config/i386/i386.md (working copy)
@@ -1878,9 +1878,11 @@
return "pxor\t%0, %0";
case TYPE_MMXMOV:
+#ifndef HAVE_AS_IX86_INTERUNIT_MOVQ
/* Handle broken assemblers that require movd instead of movq. */
if (GENERAL_REG_P (operands[0]) || GENERAL_REG_P (operands[1]))
return "movd\t{%1, %0|%0, %1}";
+#endif
return "movq\t{%1, %0|%0, %1}";
case TYPE_SSELOG1:
@@ -1890,9 +1892,11 @@
switch (get_attr_mode (insn))
{
case MODE_DI:
+#ifndef HAVE_AS_IX86_INTERUNIT_MOVQ
/* Handle broken assemblers that require movd instead of movq. */
if (GENERAL_REG_P (operands[0]) || GENERAL_REG_P (operands[1]))
return "%vmovd\t{%1, %0|%0, %1}";
+#endif
return "%vmovq\t{%1, %0|%0, %1}";
case MODE_TI:
return "%vmovdqa\t{%1, %0|%0, %1}";
@@ -2797,9 +2801,11 @@
return "movlpd\t{%1, %0|%0, %1}";
case MODE_DI:
+#ifndef HAVE_AS_IX86_INTERUNIT_MOVQ
/* Handle broken assemblers that require movd instead of movq. */
if (GENERAL_REG_P (operands[0]) || GENERAL_REG_P (operands[1]))
return "%vmovd\t{%1, %0|%0, %1}";
+#endif
return "%vmovq\t{%1, %0|%0, %1}";
default:
Index: configure.ac
===================================================================
--- configure.ac (revision 196841)
+++ configure.ac (working copy)
@@ -3723,6 +3723,14 @@
[AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
[Define if your assembler supports the sahf mnemonic in 64bit mode.])])
+ gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
+ gcc_cv_as_ix86_interunit_movq,,,
+ [.code64
+ movq %mm0, %rax
+ movq %rax, %xmm0],,
+ [AC_DEFINE(HAVE_AS_IX86_INTERUNIT_MOVQ, 1,
+ [Define if your assembler supports interunit movq mnemonic.])])
+
gcc_GAS_CHECK_FEATURE([hle prefixes],
gcc_cv_as_ix86_hle,,,
[lock xacquire cmpxchg %esi, (%ecx)],,
