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d0ae87a27c
The carry bits for each nibble N are located in bit (N+1)*4,
so the shift by 3 was off by one. Furthermore, the carry bit
for the most significant carry bit is indeed located in bit 64,
which is located in a different storage word.
Use a double-word shift-right to reassemble into a single word
and place them all at bit 0 of their respective nibbles.
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Fixes: b2167459ae ("target-hppa: Implement basic arithmetic")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>