diff options
Diffstat (limited to 'patches/gcc/3.4.4/arm-softfloat.patch')
| -rw-r--r-- | patches/gcc/3.4.4/arm-softfloat.patch | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/patches/gcc/3.4.4/arm-softfloat.patch b/patches/gcc/3.4.4/arm-softfloat.patch new file mode 100644 index 0000000..19d1b90 --- /dev/null +++ b/patches/gcc/3.4.4/arm-softfloat.patch @@ -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 |