static void gen_rem(TCGv ret, TCGv source1, TCGv source2)
{
- TCGv cond1, cond2, zeroreg, resultopt1;
+ TCGv temp1, temp2, zero, one, mone, min;
- cond1 = tcg_temp_new();
- cond2 = tcg_temp_new();
- zeroreg = tcg_constant_tl(0);
- resultopt1 = tcg_temp_new();
+ temp1 = tcg_temp_new();
+ temp2 = tcg_temp_new();
+ zero = tcg_constant_tl(0);
+ one = tcg_constant_tl(1);
+ mone = tcg_constant_tl(-1);
+ min = tcg_constant_tl(1ull << (TARGET_LONG_BITS - 1));
- tcg_gen_movi_tl(resultopt1, 1L);
- tcg_gen_setcondi_tl(TCG_COND_EQ, cond2, source2, (target_ulong)-1);
- tcg_gen_setcondi_tl(TCG_COND_EQ, cond1, source1,
- (target_ulong)1 << (TARGET_LONG_BITS - 1));
- tcg_gen_and_tl(cond2, cond1, cond2); /* cond1 = overflow */
- tcg_gen_setcondi_tl(TCG_COND_EQ, cond1, source2, 0); /* cond2 = div 0 */
- /* if overflow or div by zero, set source2 to 1, else don't change */
- tcg_gen_or_tl(cond2, cond1, cond2);
- tcg_gen_movcond_tl(TCG_COND_EQ, source2, cond2, zeroreg, source2,
- resultopt1);
- tcg_gen_rem_tl(resultopt1, source1, source2);
- /* if div by zero, just return the original dividend */
- tcg_gen_movcond_tl(TCG_COND_EQ, ret, cond1, zeroreg, resultopt1,
- source1);
+ tcg_gen_setcond_tl(TCG_COND_EQ, temp1, source1, min);
+ tcg_gen_setcond_tl(TCG_COND_EQ, temp2, source2, mone);
+ tcg_gen_and_tl(temp1, temp1, temp2); /* temp1 = overflow */
+ tcg_gen_setcond_tl(TCG_COND_EQ, temp2, source2, zero); /* temp2 = div0 */
+ tcg_gen_or_tl(temp2, temp2, temp1); /* temp2 = overflow | div0 */
- tcg_temp_free(cond1);
- tcg_temp_free(cond2);
- tcg_temp_free(resultopt1);
+ /*
+ * if overflow or div by zero, set temp2 to 1, else source2
+ * this automatically takes care of returning the original
+ * dividend for div by zero.
+ */
+ tcg_gen_movcond_tl(TCG_COND_NE, temp2, temp2, zero, one, source2);