arm/libgcc: Support signed 64-bit division
Add support for signed 64-bit division. The implementation mostly relies on __aeabi_uldivmod, which is already implemented. ldivmod.S was adapted from CrOS EC version of ldivmod.S: https://chromium.googlesource.com/chromiumos/platform/ec/+/main/third_party/libaeabi-cortexm0/core/cortex-m0/ldivmod.S The CrOS EC version was adapted from: https://github.com/bobbl/libaeabi-cortexm0/blob/master/ldivmod.S BUG=b:240316722 BRANCH=None TEST=Signed division works in PSP verstage (runs on ARM) Change-Id: I53785c732b0fa35a4809bc054f1482c5461ada7b Signed-off-by: Rob Barnes <robbarnes@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/66207 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>
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Rob Barnes
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Martin L Roth
Martin L Roth
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