On 07/18/2016 10:35 PM, Nikunj A Dadhania wrote:
+ tcg_gen_andi_tl(src1, cpu_gpr[rA(ctx->opcode)], 0xFF);
+ for (i = 0; i < 64; i += 8) {
+ tcg_gen_shri_tl(t0, arg1, i);
+ tcg_gen_andi_tl(t0, t0, 0xFF);
+ tcg_gen_brcond_tl(TCG_COND_EQ, src1, t0, l1);
+ }
+ tcg_gen_movi_i32(cpu_crf[crfD(ctx->opcode)], 0);
+ tcg_gen_br(l2);
+ gen_set_label(l1);
+ /* Set match bit, i.e. CRF_GT */
+ tcg_gen_movi_i32(cpu_crf[crfD(ctx->opcode)], 1 << CRF_GT);
Ew. This can be done much better as
http://graphics.stanford.edu/~seander/bithacks.html#ZeroInWord
Which still might be best done in a helper, because of the constants involved
(tcg is not nearly so good as gcc in building full 64-bit constants).
C.f. target-alpha/int_helper.c, helper_cmpbe0 (which computes different
information than cmpeqb, but is still helpful as an example).
r~
