svn commit: r323001 - head/lib/libcompiler_rt

[Dimitry Andric]

Author: dim
Date: Tue Aug 29 21:45:00 2017
New Revision: 323001
URL: https://svnweb.freebsd.org/changeset/base/323001

Log:
  In compiler-rt, a few assembler implementations for i386 floating point
  conversion functions use SSE2 instructions, but these are not guarded by
  #ifdef __SSE2__, and there is no implementation using general purpose
  registers.  For these functions, use the generic C variants instead,
  otherwise they will cause SIGILL on older processors.
  
  Reported by:	bsdpr at phoe.frmug.org
  PR:		221733
  MFC after:	1 week

Modified:
  head/lib/libcompiler_rt/Makefile.inc

Modified: head/lib/libcompiler_rt/Makefile.inc
==============================================================================
--- head/lib/libcompiler_rt/Makefile.inc	Tue Aug 29 21:04:29 2017	(r323000)
+++ head/lib/libcompiler_rt/Makefile.inc	Tue Aug 29 21:45:00 2017	(r323001)
@@ -57,18 +57,12 @@ SRCF+=		fixunsxfsi
 SRCF+=		fixunsxfti
 SRCF+=		fixxfdi
 SRCF+=		fixxfti
-SRCF+=		floatdidf
-SRCF+=		floatdisf
 SRCF+=		floatditf
-SRCF+=		floatdixf
 SRCF+=		floatsitf
 SRCF+=		floattidf
 SRCF+=		floattisf
 SRCF+=		floattixf
-SRCF+=		floatundidf
-SRCF+=		floatundisf
 SRCF+=		floatunditf
-SRCF+=		floatundixf
 SRCF+=		floatunsidf
 SRCF+=		floatunsisf
 SRCF+=		floatuntidf
@@ -127,6 +121,23 @@ SRCF+=		udivti3
 SRCF+=		umoddi3
 SRCF+=		umodsi3
 SRCF+=		umodti3
+
+# Avoid using SSE2 instructions on i386.
+.if ${MACHINE_CPUARCH} == "i386"
+SRCS+=		floatdidf.c
+SRCS+=		floatdisf.c
+SRCS+=		floatdixf.c
+SRCS+=		floatundidf.c
+SRCS+=		floatundisf.c
+SRCS+=		floatundixf.c
+.else
+SRCF+=		floatdidf
+SRCF+=		floatdisf
+SRCF+=		floatdixf
+SRCF+=		floatundidf
+SRCF+=		floatundisf
+SRCF+=		floatundixf
+.endif
 
 # __cpu_model support, only used on x86
 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"