+// check if AL is going to be used later in block
+static int tr_predict_al_need(void)
+{
+ int tmpv, tmpv2, op, pc = known_regs.gr[SSP_PC].h;
+
+ while (1)
+ {
+ op = PROGRAM(pc);
+ switch (op >> 9)
+ {
+ // ld d, s
+ case 0x00:
+ tmpv2 = (op >> 4) & 0xf; // dst
+ tmpv = op & 0xf; // src
+ if ((tmpv2 == SSP_A && tmpv == SSP_P) || tmpv2 == SSP_AL) // ld A, P; ld AL, *
+ return 0;
+ break;
+
+ // ld (ri), s
+ case 0x02:
+ // ld ri, s
+ case 0x0a:
+ // OP a, s
+ case 0x10: case 0x30: case 0x40: case 0x60: case 0x70:
+ tmpv = op & 0xf; // src
+ if (tmpv == SSP_AL) // OP *, AL
+ return 1;
+ break;
+
+ case 0x04:
+ case 0x06:
+ case 0x14:
+ case 0x34:
+ case 0x44:
+ case 0x64:
+ case 0x74: pc++; break;
+
+ // call cond, addr
+ case 0x24:
+ // bra cond, addr
+ case 0x26:
+ // mod cond, op
+ case 0x48:
+ // mpys?
+ case 0x1b:
+ // mpya (rj), (ri), b
+ case 0x4b: return 1;
+
+ // mld (rj), (ri), b
+ case 0x5b: return 0; // cleared anyway
+
+ // and A, *
+ case 0x50:
+ tmpv = op & 0xf; // src
+ if (tmpv == SSP_AL) return 1;
+ case 0x51: case 0x53: case 0x54: case 0x55: case 0x59: case 0x5c:
+ return 0;
+ }
+ pc++;
+ }
+}
+
+