+
+/*
+ * if Q
+ * t = carry(Rn += Rm)
+ * else
+ * t = carry(Rn -= Rm)
+ * T ^= t
+ */
+#define emith_sh2_div1_step(rn, rm, sr) { \
+ void *jmp0, *jmp1; \
+ emith_tst_r_imm(sr, Q); /* if (Q ^ M) */ \
+ JMP_POS(jmp0); /* beq do_sub */ \
+ emith_addf_r_r(rn, rm); \
+ emith_eor_r_imm_c(A_COND_CS, sr, T); \
+ JMP_POS(jmp1); /* b done */ \
+ JMP_EMIT(A_COND_EQ, jmp0); /* do_sub: */ \
+ emith_subf_r_r(rn, rm); \
+ emith_eor_r_imm_c(A_COND_CC, sr, T); \
+ JMP_EMIT(A_COND_AL, jmp1); /* done: */ \
+}
+