Add a backend-specific opcode for expanding the
GFNI vgf2p8affineqb instruction, which we can use
for expanding 8-bit immediate shifts and rotates.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The optimizer prefers to have constants as the second operand,
so expand LT x,0 instead of GT 0,x. This will not affect the
generated code at all.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Avoid ubsan failure with clang-20,
tcg.h:715:19: runtime error: applying non-zero offset 64 to null pointer
by not using pointers.
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Fix the direction of the shift, introduced when converting
the codebase to TCGOutOp* and small tgen_* helpers.
Fixes: 5a4d034f3c ("tcg: Convert extract to TCGOutOpExtract")
Reported-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Andrea Bolognani <abologna@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
If operand 2 is constant, then the computation of z_mask and a_mask
will produce the same results as the explicit check via fold_xi_to_i.
Shift the calls of fold_xx_to_i and fold_ix_to_not down below the
i2->is_const check.
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
If operand 2 is constant, then the computation of z_mask and a_mask
will produce the same results as the explicit check via fold_xi_to_i.
Shift the calls of fold_xx_to_i and fold_ix_to_not down below the
i2->is_const check.
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
If operand 2 is constant, then the computation of z_mask
and a_mask will produce the same results as the explicit
checks via fold_xi_to_i and fold_xi_to_x. Shift the call
of fold_xx_to_x down below the ti_is_const(t2) check.
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Richard Henderson
