Re: [PATCH 1/4] target/i386: use TSTEQ/TSTNE to test low bits

[Richard Henderson]

On 2/28/24 01:11, Paolo Bonzini wrote:
> When testing the sign bit or equality to zero of a partial register, it
> is useful to use a single TSTEQ or TSTNE operation.  It can also be used
> to test the parity flag, using bit 0 of the population count.
>
> Do not do this for 32- and 64-bit values however, to avoid
> large immediates.
>
> Signed-off-by: Paolo Bonzini<pbonzini@redhat.com>
> ---
>   target/i386/tcg/translate.c | 28 ++++++++++++++++++++--------
>   target/i386/tcg/emit.c.inc  |  5 ++---
>   2 files changed, 22 insertions(+), 11 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~