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authorKoen Kooi <koen@openembedded.org>2005-06-30 08:19:37 +0000
committerOpenEmbedded Project <openembedded-devel@lists.openembedded.org>2005-06-30 08:19:37 +0000
commitc8e5702127e507e82e6f68a4b8c546803accea9d (patch)
tree00583491f40ecc640f2b28452af995e3a63a09d7 /packages/gcc/gcc-3.4.3/gcc-3.4.0-arm-softfloat.patch
parent87ec8ca4d2e2eb4d1c1e1e1a6b46a395d56805b9 (diff)
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Diffstat (limited to 'packages/gcc/gcc-3.4.3/gcc-3.4.0-arm-softfloat.patch')
-rw-r--r--packages/gcc/gcc-3.4.3/gcc-3.4.0-arm-softfloat.patch256
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diff --git a/packages/gcc/gcc-3.4.3/gcc-3.4.0-arm-softfloat.patch b/packages/gcc/gcc-3.4.3/gcc-3.4.0-arm-softfloat.patch
index e69de29bb2..f53d64b374 100644
--- a/packages/gcc/gcc-3.4.3/gcc-3.4.0-arm-softfloat.patch
+++ b/packages/gcc/gcc-3.4.3/gcc-3.4.0-arm-softfloat.patch
@@ -0,0 +1,256 @@
+#
+# 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 -urNd gcc-3.4.0-orig/gcc/config/arm/coff.h gcc-3.4.0/gcc/config/arm/coff.h
+--- gcc-3.4.0-orig/gcc/config/arm/coff.h 2004-02-24 15:25:22.000000000 +0100
++++ gcc-3.4.0/gcc/config/arm/coff.h 2004-05-01 19:07:06.059409600 +0200
+@@ -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 -urNd gcc-3.4.0-orig/gcc/config/arm/elf.h gcc-3.4.0/gcc/config/arm/elf.h
+--- gcc-3.4.0-orig/gcc/config/arm/elf.h 2004-02-24 15:25:22.000000000 +0100
++++ gcc-3.4.0/gcc/config/arm/elf.h 2004-05-01 19:12:16.976486400 +0200
+@@ -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 -urNd gcc-3.4.0-orig/gcc/config/arm/linux-elf.h gcc-3.4.0/gcc/config/arm/linux-elf.h
+--- gcc-3.4.0-orig/gcc/config/arm/linux-elf.h 2004-01-31 07:18:11.000000000 +0100
++++ gcc-3.4.0/gcc/config/arm/linux-elf.h 2004-05-01 19:19:06.935979200 +0200
+@@ -30,9 +30,27 @@
+ /* Do not assume anything about header files. */
+ #define NO_IMPLICIT_EXTERN_C
+
+-/* 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)
++#define TARGET_DEFAULT \
++ ( ARM_FLAG_APCS_32 \
++ | ARM_FLAG_SOFT_FLOAT \
++ | ARM_FLAG_VFP \
++ | ARM_FLAG_MMU_TRAPS )
++
++#undef SUBTARGET_EXTRA_ASM_SPEC
++#define SUBTARGET_EXTRA_ASM_SPEC "\
++%{!mcpu=*:-mcpu=xscale} \
++%{mhard-float:-mfpu=fpa} \
++%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
+
+ #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
+
+@@ -40,7 +58,7 @@
+
+ #undef MULTILIB_DEFAULTS
+ #define MULTILIB_DEFAULTS \
+- { "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" }
++ { "marm", "mlittle-endian", "mapcs-32", "mno-thumb-interwork" }
+
+ #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
+
+@@ -55,7 +73,7 @@
+ %{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 -urNd gcc-3.4.0-orig/gcc/config/arm/t-linux gcc-3.4.0/gcc/config/arm/t-linux
+--- gcc-3.4.0-orig/gcc/config/arm/t-linux 2003-09-20 23:09:07.000000000 +0200
++++ gcc-3.4.0/gcc/config/arm/t-linux 2004-05-01 20:31:59.102846400 +0200
+@@ -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 -urNd gcc-3.4.0-orig/gcc/config/arm/unknown-elf.h gcc-3.4.0/gcc/config/arm/unknown-elf.h
+--- gcc-3.4.0-orig/gcc/config/arm/unknown-elf.h 2004-02-24 15:25:22.000000000 +0100
++++ gcc-3.4.0/gcc/config/arm/unknown-elf.h 2004-05-01 19:09:09.016212800 +0200
+@@ -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 -urNd gcc-3.4.0-orig/gcc/config/arm/xscale-elf.h gcc-3.4.0/gcc/config/arm/xscale-elf.h
+--- gcc-3.4.0-orig/gcc/config/arm/xscale-elf.h 2003-07-02 01:26:43.000000000 +0200
++++ gcc-3.4.0/gcc/config/arm/xscale-elf.h 2004-05-01 20:15:36.620105600 +0200
+@@ -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