32x: drc: new debug facility (pdb). Few fixes thanks to it.

[picodrive.git] / cpu / drc / emit_arm.c

diff --git a/cpu/drc/emit_arm.c b/cpu/drc/emit_arm.c
index 8627734..d12db86 100644 (file)
--- a/cpu/drc/emit_arm.c
+++ b/cpu/drc/emit_arm.c
@@ -241,30 +241,45 @@
 #define EOP_MSR_REG(rm)       EOP_C_MSR_REG(A_COND_AL,rm)
 
 
-// XXX: AND, RSB, *C, MVN will break if 1 insn is not enough
+// XXX: AND, RSB, *C, will break if 1 insn is not enough
 static void emith_op_imm2(int cond, int s, int op, int rd, int rn, unsigned int imm)
 {
        int ror2;
        u32 v;
 
-       if (op == A_OP_MOV) {
+       switch (op) {
+       case A_OP_MOV:
                rn = 0;
-               if (~imm < 0x100) {
+               if (~imm < 0x10000) {
                        imm = ~imm;
                        op = A_OP_MVN;
                }
-       } else if (imm == 0)
-               return;
+               break;
+
+       case A_OP_EOR:
+       case A_OP_SUB:
+       case A_OP_ADD:
+       case A_OP_ORR:
+       case A_OP_BIC:
+               if (s == 0 && imm == 0)
+                       return;
+               break;
+       }
 
-       for (v = imm, ror2 = 0; v != 0 || op == A_OP_MOV; v >>= 8, ror2 -= 8/2) {
+       for (v = imm, ror2 = 0; ; ror2 -= 8/2) {
                /* shift down to get 'best' rot2 */
                for (; v && !(v & 3); v >>= 2)
                        ror2--;
 
                EOP_C_DOP_IMM(cond, op, s, rn, rd, ror2 & 0x0f, v & 0xff);
 
+               v >>= 8;
+               if (v == 0)
+                       break;
                if (op == A_OP_MOV)
                        op = A_OP_ORR;
+               if (op == A_OP_MVN)
+                       op = A_OP_BIC;
                rn = rd;
        }
 }
@@ -414,6 +429,9 @@ static int emith_xbranch(int cond, void *target, int is_call)
 #define emith_add_r_imm(r, imm) \
        emith_op_imm(A_COND_AL, 0, A_OP_ADD, r, imm)
 
+#define emith_adc_r_imm(r, imm) \
+       emith_op_imm(A_COND_AL, 0, A_OP_ADC, r, imm)
+
 #define emith_sub_r_imm(r, imm) \
        emith_op_imm(A_COND_AL, 0, A_OP_SUB, r, imm)