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H A Dtranslate.cdiff ababac165b375b617e5b333536b846a33c48006e Sun Mar 24 21:26:41 CDT 2024 Richard Henderson <richard.henderson@linaro.org> target/hppa: Optimize UADDCM with no condition

With r1 as zero is by far the most common usage of UADDCM, as the
easiest way to invert a register. The compiler does occasionally
use the addition step as well, and we can simplify that to avoid
a temp and write directly into the destination.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>