mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-24 11:44:59 +02:00
271 lines
10 KiB
Plaintext
271 lines
10 KiB
Plaintext
|
Note... modified my mjn3 to not conflict with the big endian arm patch.
|
|||
|
|
Warning!!! Only the linux target is aware of TARGET_ENDIAN_DEFAULT.
|
|||
|
|
Also changed
|
|||
|
|
#define SUBTARGET_EXTRA_ASM_SPEC "\
|
|||
|
|
%{!mcpu=*:-mcpu=xscale} \
|
|||
|
|
%{mhard-float:-mfpu=fpa} \
|
|||
|
|
%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
|
|||
|
|
to
|
|||
|
|
#define SUBTARGET_EXTRA_ASM_SPEC "\
|
|||
|
|
%{mhard-float:-mfpu=fpa} \
|
|||
|
|
%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
|
|||
|
|
in gcc/config/arm/linux-elf.h.
|
|||
|
|
#
|
|||
|
|
# Submitted:
|
|||
|
|
#
|
|||
|
|
# Dimitry Andric <dimitry@andric.com>, 2004-05-01
|
|||
|
|
#
|
|||
|
|
# Description:
|
|||
|
|
#
|
|||
|
|
# Nicholas Pitre released this patch for gcc soft-float support here:
|
|||
|
|
# http://lists.arm.linux.org.uk/pipermail/linux-arm/2003-October/006436.html
|
|||
|
|
#
|
|||
|
|
# This version has been adapted to work with gcc 3.4.0.
|
|||
|
|
#
|
|||
|
|
# The original patch doesn't distinguish between softfpa and softvfp modes
|
|||
|
|
# in the way Nicholas Pitre probably meant. His description is:
|
|||
|
|
#
|
|||
|
|
# "Default is to use APCS-32 mode with soft-vfp. The old Linux default for
|
|||
|
|
# floats can be achieved with -mhard-float or with the configure
|
|||
|
|
# --with-float=hard option. If -msoft-float or --with-float=soft is used then
|
|||
|
|
# software float support will be used just like the default but with the legacy
|
|||
|
|
# big endian word ordering for double float representation instead."
|
|||
|
|
#
|
|||
|
|
# Which means the following:
|
|||
|
|
#
|
|||
|
|
# * If you compile without -mhard-float or -msoft-float, you should get
|
|||
|
|
# software floating point, using the VFP format. The produced object file
|
|||
|
|
# should have these flags in its header:
|
|||
|
|
#
|
|||
|
|
# private flags = 600: [APCS-32] [VFP float format] [software FP]
|
|||
|
|
#
|
|||
|
|
# * If you compile with -mhard-float, you should get hardware floating point,
|
|||
|
|
# which always uses the FPA format. Object file header flags should be:
|
|||
|
|
#
|
|||
|
|
# private flags = 0: [APCS-32] [FPA float format]
|
|||
|
|
#
|
|||
|
|
# * If you compile with -msoft-float, you should get software floating point,
|
|||
|
|
# using the FPA format. This is done for compatibility reasons with many
|
|||
|
|
# existing distributions. Object file header flags should be:
|
|||
|
|
#
|
|||
|
|
# private flags = 200: [APCS-32] [FPA float format] [software FP]
|
|||
|
|
#
|
|||
|
|
# The original patch from Nicholas Pitre contained the following constructs:
|
|||
|
|
#
|
|||
|
|
# #define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \
|
|||
|
|
# %{mhard-float:-mfpu=fpa} \
|
|||
|
|
# %{!mhard-float: %{msoft-float:-mfpu=softfpa;:-mfpu=softvfp}}"
|
|||
|
|
#
|
|||
|
|
# However, gcc doesn't accept this ";:" notation, used in the 3rd line. This
|
|||
|
|
# is probably the reason Robert Schwebel modified it to:
|
|||
|
|
#
|
|||
|
|
# #define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \
|
|||
|
|
# %{mhard-float:-mfpu=fpa} \
|
|||
|
|
# %{!mhard-float: %{msoft-float:-mfpu=softfpa -mfpu=softvfp}}"
|
|||
|
|
#
|
|||
|
|
# But this causes the following behaviour:
|
|||
|
|
#
|
|||
|
|
# * If you compile without -mhard-float or -msoft-float, the compiler generates
|
|||
|
|
# software floating point instructions, but *nothing* is passed to the
|
|||
|
|
# assembler, which results in an object file which has flags:
|
|||
|
|
#
|
|||
|
|
# private flags = 0: [APCS-32] [FPA float format]
|
|||
|
|
#
|
|||
|
|
# This is not correct!
|
|||
|
|
#
|
|||
|
|
# * If you compile with -mhard-float, the compiler generates hardware floating
|
|||
|
|
# point instructions, and passes "-mfpu=fpa" to the assembler, which results
|
|||
|
|
# in an object file which has the same flags as in the previous item, but now
|
|||
|
|
# those *are* correct.
|
|||
|
|
#
|
|||
|
|
# * If you compile with -msoft-float, the compiler generates software floating
|
|||
|
|
# point instructions, and passes "-mfpu=softfpa -mfpu=softvfp" (in that
|
|||
|
|
# order) to the assembler, which results in an object file with flags:
|
|||
|
|
#
|
|||
|
|
# private flags = 600: [APCS-32] [VFP float format] [software FP]
|
|||
|
|
#
|
|||
|
|
# This is not correct, because the last "-mfpu=" option on the assembler
|
|||
|
|
# command line determines the actual FPU convention used (which should be FPA
|
|||
|
|
# in this case).
|
|||
|
|
#
|
|||
|
|
# Therefore, I modified this patch to get the desired behaviour. Every
|
|||
|
|
# instance of the notation:
|
|||
|
|
#
|
|||
|
|
# %{msoft-float:-mfpu=softfpa -mfpu=softvfp}
|
|||
|
|
#
|
|||
|
|
# was changed to:
|
|||
|
|
#
|
|||
|
|
# %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}
|
|||
|
|
#
|
|||
|
|
# I also did the following:
|
|||
|
|
#
|
|||
|
|
# * Modified all TARGET_DEFAULT macros I could find to include ARM_FLAG_VFP, to
|
|||
|
|
# be consistent with Nicholas' original patch.
|
|||
|
|
# * Removed any "msoft-float" or "mhard-float" from all MULTILIB_DEFAULTS
|
|||
|
|
# macros I could find. I think that if you compile without any options, you
|
|||
|
|
# would like to get the defaults. :)
|
|||
|
|
# * Removed the extra -lfloat option from LIBGCC_SPEC, since it isn't needed
|
|||
|
|
# anymore. (The required functions are now in libgcc.)
|
|||
|
|
|
|||
|
|
diff -urN gcc-3.4.1-old/gcc/config/arm/coff.h gcc-3.4.1/gcc/config/arm/coff.h
|
|||
|
|
--- gcc-3.4.1-old/gcc/config/arm/coff.h 2004-02-24 08:25:22.000000000 -0600
|
|||
|
|
+++ gcc-3.4.1/gcc/config/arm/coff.h 2004-09-02 21:51:15.000000000 -0500
|
|||
|
|
@@ -31,11 +31,16 @@
|
|||
|
|
#define TARGET_VERSION fputs (" (ARM/coff)", stderr)
|
|||
|
|
|
|||
|
|
#undef TARGET_DEFAULT
|
|||
|
|
-#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)
|
|||
|
|
+#define TARGET_DEFAULT \
|
|||
|
|
+ ( ARM_FLAG_SOFT_FLOAT \
|
|||
|
|
+ | ARM_FLAG_VFP \
|
|||
|
|
+ | ARM_FLAG_APCS_32 \
|
|||
|
|
+ | ARM_FLAG_APCS_FRAME \
|
|||
|
|
+ | ARM_FLAG_MMU_TRAPS )
|
|||
|
|
|
|||
|
|
#ifndef MULTILIB_DEFAULTS
|
|||
|
|
#define MULTILIB_DEFAULTS \
|
|||
|
|
- { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork" }
|
|||
|
|
+ { "marm", "mlittle-endian", "mapcs-32", "mno-thumb-interwork" }
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* This is COFF, but prefer stabs. */
|
|||
|
|
diff -urN gcc-3.4.1-old/gcc/config/arm/elf.h gcc-3.4.1/gcc/config/arm/elf.h
|
|||
|
|
--- gcc-3.4.1-old/gcc/config/arm/elf.h 2004-02-24 08:25:22.000000000 -0600
|
|||
|
|
+++ gcc-3.4.1/gcc/config/arm/elf.h 2004-09-02 21:51:15.000000000 -0500
|
|||
|
|
@@ -46,7 +46,9 @@
|
|||
|
|
|
|||
|
|
#ifndef SUBTARGET_ASM_FLOAT_SPEC
|
|||
|
|
#define SUBTARGET_ASM_FLOAT_SPEC "\
|
|||
|
|
-%{mapcs-float:-mfloat} %{msoft-float:-mfpu=softfpa}"
|
|||
|
|
+%{mapcs-float:-mfloat} \
|
|||
|
|
+%{mhard-float:-mfpu=fpa} \
|
|||
|
|
+%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#ifndef ASM_SPEC
|
|||
|
|
@@ -106,12 +108,17 @@
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#ifndef TARGET_DEFAULT
|
|||
|
|
-#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)
|
|||
|
|
+#define TARGET_DEFAULT \
|
|||
|
|
+ ( ARM_FLAG_SOFT_FLOAT \
|
|||
|
|
+ | ARM_FLAG_VFP \
|
|||
|
|
+ | ARM_FLAG_APCS_32 \
|
|||
|
|
+ | ARM_FLAG_APCS_FRAME \
|
|||
|
|
+ | ARM_FLAG_MMU_TRAPS )
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#ifndef MULTILIB_DEFAULTS
|
|||
|
|
#define MULTILIB_DEFAULTS \
|
|||
|
|
- { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
|
|||
|
|
+ { "marm", "mlittle-endian", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#define TARGET_ASM_FILE_START_APP_OFF true
|
|||
|
|
diff -urN gcc-3.4.1-old/gcc/config/arm/linux-elf.h gcc-3.4.1/gcc/config/arm/linux-elf.h
|
|||
|
|
--- gcc-3.4.1-old/gcc/config/arm/linux-elf.h 2004-09-02 21:50:52.000000000 -0500
|
|||
|
|
+++ gcc-3.4.1/gcc/config/arm/linux-elf.h 2004-09-02 22:00:49.000000000 -0500
|
|||
|
|
@@ -44,12 +44,26 @@
|
|||
|
|
#define TARGET_LINKER_EMULATION "armelf_linux"
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
-/* Default is to use APCS-32 mode. */
|
|||
|
|
+/*
|
|||
|
|
+ * Default is to use APCS-32 mode with soft-vfp.
|
|||
|
|
+ * The old Linux default for floats can be achieved with -mhard-float
|
|||
|
|
+ * or with the configure --with-float=hard option.
|
|||
|
|
+ * If -msoft-float or --with-float=soft is used then software float
|
|||
|
|
+ * support will be used just like the default but with the legacy
|
|||
|
|
+ * big endian word ordering for double float representation instead.
|
|||
|
|
+ */
|
|||
|
|
#undef TARGET_DEFAULT
|
|||
|
|
-#define TARGET_DEFAULT \
|
|||
|
|
- ( ARM_FLAG_APCS_32 | \
|
|||
|
|
- ARM_FLAG_MMU_TRAPS | \
|
|||
|
|
- TARGET_ENDIAN_DEFAULT )
|
|||
|
|
+#define TARGET_DEFAULT \
|
|||
|
|
+ ( ARM_FLAG_APCS_32 \
|
|||
|
|
+ | ARM_FLAG_SOFT_FLOAT \
|
|||
|
|
+ | TARGET_ENDIAN_DEFAULT \
|
|||
|
|
+ | ARM_FLAG_VFP \
|
|||
|
|
+ | ARM_FLAG_MMU_TRAPS )
|
|||
|
|
+
|
|||
|
|
+#undef SUBTARGET_EXTRA_ASM_SPEC
|
|||
|
|
+#define SUBTARGET_EXTRA_ASM_SPEC "\
|
|||
|
|
+%{mhard-float:-mfpu=fpa} \
|
|||
|
|
+%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
|
|||
|
|
|
|||
|
|
#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
|
|||
|
|
|
|||
|
|
@@ -57,7 +71,7 @@
|
|||
|
|
|
|||
|
|
#undef MULTILIB_DEFAULTS
|
|||
|
|
#define MULTILIB_DEFAULTS \
|
|||
|
|
- { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }
|
|||
|
|
+ { "marm", TARGET_ENDIAN_OPTION, "mapcs-32", "mno-thumb-interwork" }
|
|||
|
|
|
|||
|
|
#define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
|
|||
|
|
|
|||
|
|
@@ -72,7 +86,7 @@
|
|||
|
|
%{shared:-lc} \
|
|||
|
|
%{!shared:%{profile:-lc_p}%{!profile:-lc}}"
|
|||
|
|
|
|||
|
|
-#define LIBGCC_SPEC "%{msoft-float:-lfloat} -lgcc"
|
|||
|
|
+#define LIBGCC_SPEC "-lgcc"
|
|||
|
|
|
|||
|
|
/* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add
|
|||
|
|
the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
|
|||
|
|
diff -urN gcc-3.4.1-old/gcc/config/arm/t-linux gcc-3.4.1/gcc/config/arm/t-linux
|
|||
|
|
--- gcc-3.4.1-old/gcc/config/arm/t-linux 2003-09-20 16:09:07.000000000 -0500
|
|||
|
|
+++ gcc-3.4.1/gcc/config/arm/t-linux 2004-09-02 21:51:15.000000000 -0500
|
|||
|
|
@@ -4,7 +4,10 @@
|
|||
|
|
LIBGCC2_DEBUG_CFLAGS = -g0
|
|||
|
|
|
|||
|
|
LIB1ASMSRC = arm/lib1funcs.asm
|
|||
|
|
-LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx
|
|||
|
|
+LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx \
|
|||
|
|
+ _negdf2 _addsubdf3 _muldivdf3 _cmpdf2 _unorddf2 _fixdfsi _fixunsdfsi \
|
|||
|
|
+ _truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \
|
|||
|
|
+ _fixsfsi _fixunssfsi
|
|||
|
|
|
|||
|
|
# MULTILIB_OPTIONS = mhard-float/msoft-float
|
|||
|
|
# MULTILIB_DIRNAMES = hard-float soft-float
|
|||
|
|
diff -urN gcc-3.4.1-old/gcc/config/arm/unknown-elf.h gcc-3.4.1/gcc/config/arm/unknown-elf.h
|
|||
|
|
--- gcc-3.4.1-old/gcc/config/arm/unknown-elf.h 2004-02-24 08:25:22.000000000 -0600
|
|||
|
|
+++ gcc-3.4.1/gcc/config/arm/unknown-elf.h 2004-09-02 21:51:15.000000000 -0500
|
|||
|
|
@@ -30,7 +30,12 @@
|
|||
|
|
|
|||
|
|
/* Default to using APCS-32 and software floating point. */
|
|||
|
|
#ifndef TARGET_DEFAULT
|
|||
|
|
-#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)
|
|||
|
|
+#define TARGET_DEFAULT \
|
|||
|
|
+ ( ARM_FLAG_SOFT_FLOAT \
|
|||
|
|
+ | ARM_FLAG_VFP \
|
|||
|
|
+ | ARM_FLAG_APCS_32 \
|
|||
|
|
+ | ARM_FLAG_APCS_FRAME \
|
|||
|
|
+ | ARM_FLAG_MMU_TRAPS )
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* Now we define the strings used to build the spec file. */
|
|||
|
|
diff -urN gcc-3.4.1-old/gcc/config/arm/xscale-elf.h gcc-3.4.1/gcc/config/arm/xscale-elf.h
|
|||
|
|
--- gcc-3.4.1-old/gcc/config/arm/xscale-elf.h 2003-07-01 18:26:43.000000000 -0500
|
|||
|
|
+++ gcc-3.4.1/gcc/config/arm/xscale-elf.h 2004-09-02 21:51:15.000000000 -0500
|
|||
|
|
@@ -49,11 +49,12 @@
|
|||
|
|
endian, regardless of the endian-ness of the memory
|
|||
|
|
system. */
|
|||
|
|
|
|||
|
|
-#define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \
|
|||
|
|
- %{mhard-float:-mfpu=fpa} \
|
|||
|
|
- %{!mhard-float: %{msoft-float:-mfpu=softfpa;:-mfpu=softvfp}}"
|
|||
|
|
+#define SUBTARGET_EXTRA_ASM_SPEC "\
|
|||
|
|
+%{!mcpu=*:-mcpu=xscale} \
|
|||
|
|
+%{mhard-float:-mfpu=fpa} \
|
|||
|
|
+%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
|
|||
|
|
|
|||
|
|
#ifndef MULTILIB_DEFAULTS
|
|||
|
|
#define MULTILIB_DEFAULTS \
|
|||
|
|
- { "mlittle-endian", "mno-thumb-interwork", "marm", "msoft-float" }
|
|||
|
|
+ { "mlittle-endian", "mno-thumb-interwork", "marm" }
|
|||
|
|
#endif
|