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-rw-r--r--toolchain/gcc/patches/3.4.6/arm-softfloat.patch.conditional270
1 files changed, 270 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/3.4.6/arm-softfloat.patch.conditional b/toolchain/gcc/patches/3.4.6/arm-softfloat.patch.conditional
new file mode 100644
index 0000000..19d1b90
--- /dev/null
+++ b/toolchain/gcc/patches/3.4.6/arm-softfloat.patch.conditional
@@ -0,0 +1,270 @@
+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