[patch] Fixes for SH-4 without an FPU

[Andrew Stubbs]

This patch disables SH-4 optimizations that rely on the FPU when 
building for variants that don't have an FPU, such as SH-4AL.

Signed-off-by: Andrew Stubbs <ams at codesourcery.com>
---
diff --git a/libc/string/sh/sh4/memcpy.S b/libc/string/sh/sh4/memcpy.S
index efdaf8b..83d40d4 100644
--- a/libc/string/sh/sh4/memcpy.S
+++ b/libc/string/sh/sh4/memcpy.S
@@ -21,7 +21,7 @@
  #include <sysdep.h>
  #include <endian.h>

-#ifdef __LITTLE_ENDIAN__
+#if defined(__LITTLE_ENDIAN__) && defined(__FPU_ANY__)
  #define	MEMCPY_USES_FPU
  /* Use paired single precision load or store mode for 64-bit tranfering.
   * FPSCR.SZ=1,FPSCR.SZ=0 is well defined on both SH4-200 and SH4-300.
diff --git a/libc/string/sh/sh4/memmove.c b/libc/string/sh/sh4/memmove.c
index 4d52db2..67f9a1e 100644
--- a/libc/string/sh/sh4/memmove.c
+++ b/libc/string/sh/sh4/memmove.c
@@ -7,8 +7,12 @@
   * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   */

-#include <string.h>

+#ifndef __FPU_ANY__
+#include "../../memmove.c"
+#else
+
+#include <string.h>

  #define FPSCR_SR	(1 << 20)
  #define STORE_FPSCR(x)	__asm__ volatile("sts fpscr, %0" : "=r"(x))
@@ -115,3 +119,5 @@ void *memmove(void *dest, const void *src, size_t len)
  }

  libc_hidden_def(memmove)
+
+#endif
diff --git a/libc/string/sh/sh4/memset.S b/libc/string/sh/sh4/memset.S
index 1a57cb9..5cef0db 100644
--- a/libc/string/sh/sh4/memset.S
+++ b/libc/string/sh/sh4/memset.S
@@ -17,7 +17,7 @@

  #include <sysdep.h>

-#ifdef __LITTLE_ENDIAN__
+#if defined(__LITTLE_ENDIAN__) && defined(__FPU_ANY__)
  #define MEMSET_USES_FPU
  /* Use paired single precision load or store mode for 64-bit tranfering.
   * FPSCR.SZ=1,FPSCR.SZ=0 is well defined on both SH4-200 and SH4-300.
diff --git a/libc/sysdeps/linux/sh/Makefile.arch 
b/libc/sysdeps/linux/sh/Makefile.arch
index 727a3f4..62f3d47 100644
--- a/libc/sysdeps/linux/sh/Makefile.arch
+++ b/libc/sysdeps/linux/sh/Makefile.arch
@@ -12,5 +12,5 @@ CSRC := \
  SSRC := setjmp.S __longjmp.S ___fpscr_values.S

  ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y)
-SSRC += vfork.S
+SSRC += vfork.S clone.S
  endif