[U-Boot] [PATCH] dm: mips: Import libgcc components from Linux
Marek Vasut
marex at denx.de
Fri Jul 27 20:35:25 CEST 2012
Import ashldr3, ashrdi3 and lshrdi3 to squash possible libgcc fp mismatch,
resulting in the following warning:
mips-linux-gnu-ld: Warning: /usr/lib/gcc/mips-linux-gnu/4.7/libgcc.a(_lshrdi3.o) uses hard float, u-boot uses soft float
mips-linux-gnu-ld: Warning: /usr/lib/gcc/mips-linux-gnu/4.7/libgcc.a(_ashldi3.o) uses hard float, u-boot uses soft float
Imported from Linux (linux-next 20120723) as of commit:
commit 72fbfb260197a52c2bc2583f3e8f15d261d0f924
Author: Ralf Baechle <ralf at linux-mips.org>
Date: Wed Jun 7 13:25:37 2006 +0100
[MIPS] Fix optimization for size build.
It took a while longer than on other architectures but gcc has finally
started to strike us as well ...
This also fixes the damage by 6edfba1b33c701108717f4e036320fc39abe1912.
Signed-off-by: Ralf Baechle <ralf at linux-mips.org>
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck at googlemail.com>
---
arch/mips/lib/Makefile | 2 ++
arch/mips/lib/ashldi3.c | 25 +++++++++++++++++++++++++
arch/mips/lib/ashrdi3.c | 27 +++++++++++++++++++++++++++
arch/mips/lib/libgcc.h | 25 +++++++++++++++++++++++++
arch/mips/lib/lshrdi3.c | 25 +++++++++++++++++++++++++
5 files changed, 104 insertions(+)
create mode 100644 arch/mips/lib/ashldi3.c
create mode 100644 arch/mips/lib/ashrdi3.c
create mode 100644 arch/mips/lib/libgcc.h
create mode 100644 arch/mips/lib/lshrdi3.c
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 9244f31..a469e30 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -34,6 +34,8 @@ else
COBJS-y += bootm.o
endif
+COBJS-y += ashldi3.o ashrdi3.o lshrdi3.o
+
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
diff --git a/arch/mips/lib/ashldi3.c b/arch/mips/lib/ashldi3.c
new file mode 100644
index 0000000..9b50d86
--- /dev/null
+++ b/arch/mips/lib/ashldi3.c
@@ -0,0 +1,25 @@
+#include "libgcc.h"
+
+long long __ashldi3(long long u, word_type b)
+{
+ DWunion uu, w;
+ word_type bm;
+
+ if (b == 0)
+ return u;
+
+ uu.ll = u;
+ bm = 32 - b;
+
+ if (bm <= 0) {
+ w.s.low = 0;
+ w.s.high = (unsigned int) uu.s.low << -bm;
+ } else {
+ const unsigned int carries = (unsigned int) uu.s.low >> bm;
+
+ w.s.low = (unsigned int) uu.s.low << b;
+ w.s.high = ((unsigned int) uu.s.high << b) | carries;
+ }
+
+ return w.ll;
+}
diff --git a/arch/mips/lib/ashrdi3.c b/arch/mips/lib/ashrdi3.c
new file mode 100644
index 0000000..f30359b
--- /dev/null
+++ b/arch/mips/lib/ashrdi3.c
@@ -0,0 +1,27 @@
+#include "libgcc.h"
+
+long long __ashrdi3(long long u, word_type b)
+{
+ DWunion uu, w;
+ word_type bm;
+
+ if (b == 0)
+ return u;
+
+ uu.ll = u;
+ bm = 32 - b;
+
+ if (bm <= 0) {
+ /* w.s.high = 1..1 or 0..0 */
+ w.s.high =
+ uu.s.high >> 31;
+ w.s.low = uu.s.high >> -bm;
+ } else {
+ const unsigned int carries = (unsigned int) uu.s.high << bm;
+
+ w.s.high = uu.s.high >> b;
+ w.s.low = ((unsigned int) uu.s.low >> b) | carries;
+ }
+
+ return w.ll;
+}
diff --git a/arch/mips/lib/libgcc.h b/arch/mips/lib/libgcc.h
new file mode 100644
index 0000000..05909d5
--- /dev/null
+++ b/arch/mips/lib/libgcc.h
@@ -0,0 +1,25 @@
+#ifndef __ASM_LIBGCC_H
+#define __ASM_LIBGCC_H
+
+#include <asm/byteorder.h>
+
+typedef int word_type __attribute__ ((mode (__word__)));
+
+#ifdef __BIG_ENDIAN
+struct DWstruct {
+ int high, low;
+};
+#elif defined(__LITTLE_ENDIAN)
+struct DWstruct {
+ int low, high;
+};
+#else
+#error I feel sick.
+#endif
+
+typedef union {
+ struct DWstruct s;
+ long long ll;
+} DWunion;
+
+#endif /* __ASM_LIBGCC_H */
diff --git a/arch/mips/lib/lshrdi3.c b/arch/mips/lib/lshrdi3.c
new file mode 100644
index 0000000..bb340ac
--- /dev/null
+++ b/arch/mips/lib/lshrdi3.c
@@ -0,0 +1,25 @@
+#include "libgcc.h"
+
+long long __lshrdi3(long long u, word_type b)
+{
+ DWunion uu, w;
+ word_type bm;
+
+ if (b == 0)
+ return u;
+
+ uu.ll = u;
+ bm = 32 - b;
+
+ if (bm <= 0) {
+ w.s.high = 0;
+ w.s.low = (unsigned int) uu.s.high >> -bm;
+ } else {
+ const unsigned int carries = (unsigned int) uu.s.high << bm;
+
+ w.s.high = (unsigned int) uu.s.high >> b;
+ w.s.low = ((unsigned int) uu.s.low >> b) | carries;
+ }
+
+ return w.ll;
+}
--
1.7.10.4
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