An hppa guest executing
0x000000000000e05c: ldil L%10000,r4
0x000000000000e060: ldo 0(r4),r4
0x000000000000e064: sub r3,r4,sp
produces
---- 000000000000e064 000000000000e068
sub2_i32 tmp0,tmp4,r3,$0x1,$0x10000,$0x0
after folding and constant propagation. Then we hit
tcg-target.c.inc:640: tcg_out_insn_3401: Assertion `aimm <= 0xfff' failed.
because aimm is in fact -16, but unsigned.
The ((bl < 0) ^ sub) condition which negates bl is incorrect and will
always lead to this abort. If the constant is positive, sub will make
it negative; if the constant is negative, sub will keep it negative.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
707b45a247