[oe] [PATCH, v2] gcc-4.5: added thumb2 build patch

[Khem Raj]

On Mon, Feb 7, 2011 at 9:25 AM, Enrico Scholz
<enrico.scholz at sigma-chemnitz.de> wrote:
> Fix for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43999 and is
> required to build gcc for Thumb2 only architectures (e.g. Cortex-M3).
>
> Signed-off-by: Enrico Scholz <enrico.scholz at sigma-chemnitz.de>
> ---
>  recipes/gcc/gcc-4.5.inc                |    3 ++-
>  recipes/gcc/gcc-4.5/thumb2-build.patch |   16 ++++++++++++++++
>  2 files changed, 18 insertions(+), 1 deletions(-)
>  create mode 100644 recipes/gcc/gcc-4.5/thumb2-build.patch
>
> diff --git a/recipes/gcc/gcc-4.5.inc b/recipes/gcc/gcc-4.5.inc
> index b630528..9ba2e22 100644
> --- a/recipes/gcc/gcc-4.5.inc
> +++ b/recipes/gcc/gcc-4.5.inc
> @@ -8,7 +8,7 @@ DEPENDS = "mpfr gmp libmpc libelf"
>  NATIVEDEPS = "mpfr-native gmp-native libmpc-native"
>
>
> -INC_PR = "r31"
> +INC_PR = "r32"
>
>  SRCREV = "168622"
>  PV = "4.5"
> @@ -166,6 +166,7 @@ SRC_URI = "svn://gcc.gnu.org/svn/gcc/branches;module=${BRANCH} \
>  #         file://linaro/gcc-4.5-linaro-r99457.patch \
>           file://gcc-scalar-widening-pr45847.patch \
>           file://gcc-arm-volatile-bitfield-fix.patch \
> +          file://thumb2-build.patch \
>          "
>
>  SRC_URI_append_mips64 = " file://mips64-nomultilib.patch "
> diff --git a/recipes/gcc/gcc-4.5/thumb2-build.patch b/recipes/gcc/gcc-4.5/thumb2-build.patch
> new file mode 100644
> index 0000000..75e765e
> --- /dev/null
> +++ b/recipes/gcc/gcc-4.5/thumb2-build.patch
> @@ -0,0 +1,16 @@
> +Fix for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43999
> +
> +Patch was taken from comment #3 (Jing Yu) there; the patch attached
> +to the named bugreport is wrong.
> +
> +Index: gcc/config/arm/lib1funcs.asm
> +===================================================================
> +--- a/gcc/config/arm/lib1funcs.asm     (revision 163231)
> ++++ b/gcc/config/arm/lib1funcs.asm     (working copy)
> +@@ -642,5 +642,5 @@
> +       cmp     \dividend, #0                   @ Early termination?
> +-      do_it   hs, t
> ++      do_it   ne, t

This needs to be tested on all arms before being taken in. I would
suggest test it
on beagleboard and qemuarm that will cover other two case arm/thumb1
if gcc testsuites
show no new regressions then we can consider it.

> +       movnes  \curbit,   \curbit,  lsr #4     @ No, any more bits to do?
> +       movne   \divisor,  \divisor, lsr #4
> +       bne     1b
> --
> 1.7.4
>
>
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