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-rw-r--r--src/core/arm/interpreter/armemu.cpp367
1 files changed, 142 insertions, 225 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp
index 9c6602f09..f0d349de7 100644
--- a/src/core/arm/interpreter/armemu.cpp
+++ b/src/core/arm/interpreter/armemu.cpp
@@ -6264,129 +6264,94 @@ L_stm_s_takeabort:
return 1;
}
}
- printf("Unhandled v6 insn: pkh/sxtab/selsxtb\n");
- break;
- case 0x6a: {
- ARMword Rm;
- int ror = -1;
-
- switch (BITS(4, 11)) {
- case 0x07:
- ror = 0;
- break;
- case 0x47:
- ror = 8;
- break;
- case 0x87:
- ror = 16;
- break;
- case 0xc7:
- ror = 24;
- break;
-
- case 0x01:
- case 0xf3:
- //ichfly
- //SSAT16
- {
- const u8 rd_idx = BITS(12, 15);
- const u8 rn_idx = BITS(0, 3);
- const u8 num_bits = BITS(16, 19) + 1;
- const s16 min = -(0x8000 >> (16 - num_bits));
- const s16 max = (0x7FFF >> (16 - num_bits));
- s16 rn_lo = (state->Reg[rn_idx]);
- s16 rn_hi = (state->Reg[rn_idx] >> 16);
-
- if (rn_lo > max) {
- rn_lo = max;
- SETQ;
- } else if (rn_lo < min) {
- rn_lo = min;
- SETQ;
- }
-
- if (rn_hi > max) {
- rn_hi = max;
- SETQ;
- } else if (rn_hi < min) {
- rn_hi = min;
- SETQ;
- }
-
- state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi & 0xFFFF) << 16);
- return 1;
- }
+ printf("Unhandled v6 insn: pkh/sxtab/selsxtb\n");
+ break;
- default:
- break;
- }
+ case 0x6a: // SSAT, SSAT16, SXTB, and SXTAB
+ {
+ const u8 op2 = BITS(5, 7);
- if (ror == -1) {
- if (BITS(4, 6) == 0x7) {
- printf("Unhandled v6 insn: ssat\n");
- return 0;
+ // SSAT16
+ if (op2 == 0x01) {
+ const u8 rd_idx = BITS(12, 15);
+ const u8 rn_idx = BITS(0, 3);
+ const u8 num_bits = BITS(16, 19) + 1;
+ const s16 min = -(0x8000 >> (16 - num_bits));
+ const s16 max = (0x7FFF >> (16 - num_bits));
+ s16 rn_lo = (state->Reg[rn_idx]);
+ s16 rn_hi = (state->Reg[rn_idx] >> 16);
+
+ if (rn_lo > max) {
+ rn_lo = max;
+ SETQ;
+ } else if (rn_lo < min) {
+ rn_lo = min;
+ SETQ;
}
- break;
- }
- Rm = ((state->Reg[BITS(0, 3)] >> ror) & 0xFF) | (((state->Reg[BITS(0, 3)] << (32 - ror)) & 0xFF) & 0xFF);
- if (Rm & 0x80)
- Rm |= 0xffffff00;
+ if (rn_hi > max) {
+ rn_hi = max;
+ SETQ;
+ } else if (rn_hi < min) {
+ rn_hi = min;
+ SETQ;
+ }
- if (BITS(16, 19) == 0xf)
- /* SXTB */
- state->Reg[BITS(12, 15)] = Rm;
- else
- /* SXTAB */
- state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + Rm;
+ state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi & 0xFFFF) << 16);
+ return 1;
+ }
+ else if (op2 == 0x03) {
+ const u8 rotation = BITS(10, 11) * 8;
+ u32 rm = ((state->Reg[BITS(0, 3)] >> rotation) & 0xFF) | (((state->Reg[BITS(0, 3)] << (32 - rotation)) & 0xFF) & 0xFF);
+ if (rm & 0x80)
+ rm |= 0xffffff00;
+
+ // SXTB, otherwise SXTAB
+ if (BITS(16, 19) == 0xf)
+ state->Reg[BITS(12, 15)] = rm;
+ else
+ state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + rm;
- return 1;
+ return 1;
+ }
+ else {
+ printf("Unimplemented op: SSAT");
+ }
}
- case 0x6b:
+ break;
+
+ case 0x6b: // REV, REV16, SXTH, and SXTAH
{
- ARMword Rm;
- int ror = -1;
-
- switch (BITS(4, 11)) {
- case 0x07:
- ror = 0;
- break;
- case 0x47:
- ror = 8;
- break;
- case 0x87:
- ror = 16;
- break;
- case 0xc7:
- ror = 24;
- break;
-
- case 0xf3: // REV
- DEST = ((RHS & 0xFF) << 24) | ((RHS & 0xFF00)) << 8 | ((RHS & 0xFF0000) >> 8) | ((RHS & 0xFF000000) >> 24);
- return 1;
- case 0xfb: // REV16
- DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00)) >> 8 | ((RHS & 0xFF0000) << 8) | ((RHS & 0xFF000000) >> 8);
- return 1;
- default:
- break;
- }
+ const u8 op2 = BITS(5, 7);
- if (ror == -1)
- break;
+ // REV
+ if (op2 == 0x01) {
+ DEST = ((RHS & 0xFF) << 24) | ((RHS & 0xFF00)) << 8 | ((RHS & 0xFF0000) >> 8) | ((RHS & 0xFF000000) >> 24);
+ return 1;
+ }
+ // REV16
+ else if (op2 == 0x05) {
+ DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00)) >> 8 | ((RHS & 0xFF0000) << 8) | ((RHS & 0xFF000000) >> 8);
+ return 1;
+ }
+ else if (op2 == 0x03) {
+ const u8 rotate = BITS(10, 11) * 8;
- Rm = ((state->Reg[BITS(0, 3)] >> ror) & 0xFFFF) | (((state->Reg[BITS(0, 3)] << (32 - ror)) & 0xFFFF) & 0xFFFF);
- if (Rm & 0x8000)
- Rm |= 0xffff0000;
+ u32 rm = ((state->Reg[BITS(0, 3)] >> rotate) & 0xFFFF) | (((state->Reg[BITS(0, 3)] << (32 - rotate)) & 0xFFFF) & 0xFFFF);
+ if (rm & 0x8000)
+ rm |= 0xffff0000;
- if (BITS(16, 19) == 0xf)
- /* SXTH */
- state->Reg[BITS(12, 15)] = Rm;
- else
- /* SXTAH */
- state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + Rm;
+ // SXTH, otherwise SXTAH
+ if (BITS(16, 19) == 15)
+ state->Reg[BITS(12, 15)] = rm;
+ else
+ state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + rm;
- return 1;
+ return 1;
+ }
}
+ break;
+
case 0x6c: // UXTB16 and UXTAB16
{
const u8 rm_idx = BITS(0, 3);
@@ -6414,132 +6379,84 @@ L_stm_s_takeabort:
return 1;
}
break;
- case 0x6e: {
- ARMword Rm;
- int ror = -1;
-
- switch (BITS(4, 11)) {
- case 0x07:
- ror = 0;
- break;
- case 0x47:
- ror = 8;
- break;
- case 0x87:
- ror = 16;
- break;
- case 0xc7:
- ror = 24;
- break;
-
- case 0x01:
- case 0xf3:
- //ichfly
- //USAT16
- {
- const u8 rd_idx = BITS(12, 15);
- const u8 rn_idx = BITS(0, 3);
- const u8 num_bits = BITS(16, 19);
- const s16 max = 0xFFFF >> (16 - num_bits);
- s16 rn_lo = (state->Reg[rn_idx]);
- s16 rn_hi = (state->Reg[rn_idx] >> 16);
-
- if (max < rn_lo) {
- rn_lo = max;
- SETQ;
- } else if (rn_lo < 0) {
- rn_lo = 0;
- SETQ;
- }
-
- if (max < rn_hi) {
- rn_hi = max;
- SETQ;
- } else if (rn_hi < 0) {
- rn_hi = 0;
- SETQ;
- }
-
- state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi << 16) & 0xFFFF);
- return 1;
- }
-
- default:
- break;
- }
+ case 0x6e: // USAT, USAT16, UXTB, and UXTAB
+ {
+ const u8 op2 = BITS(5, 7);
- if (ror == -1) {
- if (BITS(4, 6) == 0x7) {
- printf("Unhandled v6 insn: usat\n");
- return 0;
+ // USAT16
+ if (op2 == 0x01) {
+ const u8 rd_idx = BITS(12, 15);
+ const u8 rn_idx = BITS(0, 3);
+ const u8 num_bits = BITS(16, 19);
+ const s16 max = 0xFFFF >> (16 - num_bits);
+ s16 rn_lo = (state->Reg[rn_idx]);
+ s16 rn_hi = (state->Reg[rn_idx] >> 16);
+
+ if (max < rn_lo) {
+ rn_lo = max;
+ SETQ;
+ } else if (rn_lo < 0) {
+ rn_lo = 0;
+ SETQ;
}
- break;
+
+ if (max < rn_hi) {
+ rn_hi = max;
+ SETQ;
+ } else if (rn_hi < 0) {
+ rn_hi = 0;
+ SETQ;
+ }
+
+ state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi << 16) & 0xFFFF);
+ return 1;
}
-
- Rm = ((state->Reg[BITS(0, 3)] >> ror) & 0xFF) | (((state->Reg[BITS(0, 3)] << (32 - ror)) & 0xFF) & 0xFF);
-
- if (BITS(16, 19) == 0xf)
+ else if (op2 == 0x03) {
+ const u8 rotate = BITS(10, 11) * 8;
+ const u32 rm = ((state->Reg[BITS(0, 3)] >> rotate) & 0xFF) | (((state->Reg[BITS(0, 3)] << (32 - rotate)) & 0xFF) & 0xFF);
+
+ if (BITS(16, 19) == 0xf)
/* UXTB */
- state->Reg[BITS(12, 15)] = Rm;
- else
+ state->Reg[BITS(12, 15)] = rm;
+ else
/* UXTAB */
- state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + Rm;
-
- return 1;
- }
+ state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + rm;
- case 0x6f: {
- ARMword Rm;
- int ror = -1;
-
- switch (BITS(4, 11)) {
- case 0x07:
- ror = 0;
- break;
- case 0x47:
- ror = 8;
- break;
- case 0x87:
- ror = 16;
- break;
- case 0xc7:
- ror = 24;
- break;
-
- case 0xfb: // REVSH
- {
- DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00) >> 8);
- if (DEST & 0x8000)
- DEST |= 0xffff0000;
- return 1;
- }
- default:
- break;
+ return 1;
}
+ else {
+ printf("Unimplemented op: USAT");
+ }
+ }
+ break;
- if (ror == -1)
- break;
-
- Rm = ((state->Reg[BITS(0, 3)] >> ror) & 0xFFFF) | (((state->Reg[BITS(0, 3)] << (32 - ror)) & 0xFFFF) & 0xFFFF);
+ case 0x6f: // UXTH, UXTAH, and REVSH.
+ {
+ const u8 op2 = BITS(5, 7);
- /* UXT */
- /* state->Reg[BITS (12, 15)] = Rm; */
- /* dyf add */
- if (BITS(16, 19) == 0xf) {
- state->Reg[BITS(12, 15)] = Rm;
- }
- else {
- /* UXTAH */
- /* state->Reg[BITS (12, 15)] = state->Reg [BITS (16, 19)] + Rm; */
- // printf("rd is %x rn is %x rm is %x rotate is %x\n", state->Reg[BITS (12, 15)], state->Reg[BITS (16, 19)]
- // , Rm, BITS(10, 11));
- // printf("icounter is %lld\n", state->NumInstrs);
- state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + Rm;
- // printf("rd is %x\n", state->Reg[BITS (12, 15)]);
- // exit(-1);
+ // REVSH
+ if (op2 == 0x05) {
+ DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00) >> 8);
+ if (DEST & 0x8000)
+ DEST |= 0xffff0000;
+ return 1;
}
+ // UXTH and UXTAH
+ else if (op2 == 0x03) {
+ const u8 rotate = BITS(10, 11) * 8;
+ const ARMword rm = ((state->Reg[BITS(0, 3)] >> rotate) & 0xFFFF) | (((state->Reg[BITS(0, 3)] << (32 - rotate)) & 0xFFFF) & 0xFFFF);
+
+ // UXTH
+ if (BITS(16, 19) == 0xf) {
+ state->Reg[BITS(12, 15)] = rm;
+ }
+ // UXTAH
+ else {
+ state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + rm;
+ }
- return 1;
+ return 1;
+ }
}
case 0x70:
// ichfly
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 12:25:32 +0100