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From: <sv...@va...> - 2010-08-14 08:08:36
|
Author: sewardj
Date: 2010-08-14 09:08:26 +0100 (Sat, 14 Aug 2010)
New Revision: 2008
Log:
Thumb fixes:
- handle CMN(16-bit), TEQ.W Rn,#constT, CMN.W Rn,Rm,{shift}
Modified:
branches/THUMB/priv/guest_arm_toIR.c
Modified: branches/THUMB/priv/guest_arm_toIR.c
===================================================================
--- branches/THUMB/priv/guest_arm_toIR.c 2010-08-12 07:40:27 UTC (rev 2007)
+++ branches/THUMB/priv/guest_arm_toIR.c 2010-08-14 08:08:26 UTC (rev 2008)
@@ -11824,8 +11824,10 @@
switch (INSN0(15,6)) {
- case 0x10a: {
+ case 0x10a: // CMP
+ case 0x10b: { // CMN
/* ---------------- CMP Rn, Rm ---------------- */
+ Bool isCMN = INSN0(15,6) == 0x10b;
UInt rN = INSN0(2,0);
UInt rM = INSN0(5,3);
IRTemp argL = newTemp(Ity_I32);
@@ -11833,8 +11835,9 @@
assign( argL, getIRegT(rN) );
assign( argR, getIRegT(rM) );
/* Update flags regardless of whether in an IT block or not. */
- setFlags_D1_D2( ARMG_CC_OP_SUB, argL, argR, condT );
- DIP("cmp r%u, r%u\n", rN, rM);
+ setFlags_D1_D2( isCMN ? ARMG_CC_OP_ADD : ARMG_CC_OP_SUB,
+ argL, argR, condT );
+ DIP("%s r%u, r%u\n", isCMN ? "cmn" : "cmp", rN, rM);
goto decode_success;
}
@@ -13284,13 +13287,15 @@
}
/* -------------- (T1) TST.W Rn, #constT -------------- */
- // Ditto TEQ
+ /* -------------- (T1) TEQ.W Rn, #constT -------------- */
if (INSN0(15,11) == BITS5(1,1,1,1,0)
- && INSN0(9,4) == BITS6(0,0,0,0,0,1)
+ && ( INSN0(9,4) == BITS6(0,0,0,0,0,1) // TST
+ || INSN0(9,4) == BITS6(0,0,1,0,0,1)) // TEQ
&& INSN1(15,15) == 0
&& INSN1(11,8) == BITS4(1,1,1,1)) {
UInt rN = INSN0(3,0);
if (!isBadRegT(rN)) { // yes, really, it's inconsistent with CMP.W
+ Bool isTST = INSN0(9,4) == BITS6(0,0,0,0,0,1);
IRTemp argL = newTemp(Ity_I32);
IRTemp argR = newTemp(Ity_I32);
IRTemp res = newTemp(Ity_I32);
@@ -13300,13 +13305,14 @@
UInt imm32 = thumbExpandImm_from_I0_I1(&updC, insn0, insn1);
assign(argL, getIRegT(rN));
assign(argR, mkU32(imm32));
- assign(res, binop(Iop_And32, mkexpr(argL), mkexpr(argR)));
+ assign(res, binop(isTST ? Iop_And32 : Iop_Xor32,
+ mkexpr(argL), mkexpr(argR)));
assign( oldV, mk_armg_calculate_flag_v() );
assign( oldC, updC
? mkU32((imm32 >> 31) & 1)
: mk_armg_calculate_flag_c() );
setFlags_D1_D2_ND( ARMG_CC_OP_LOGIC, res, oldC, oldV, condT );
- DIP("tst.w r%u, #%u\n", rN, imm32);
+ DIP("%s.w r%u, #%u\n", isTST ? "tst" : "teq", rN, imm32);
goto decode_success;
}
}
@@ -13777,17 +13783,19 @@
}
}
- /* -------------- (T?) CMP.W Rn, Rm, {shift} -------------- */
- // Ditto CMN
+ /* -------------- (T3) CMP.W Rn, Rm, {shift} -------------- */
+ /* -------------- (T2) CMN.W Rn, Rm, {shift} -------------- */
if (INSN0(15,9) == BITS7(1,1,1,0,1,0,1)
- && INSN0(8,4) == BITS5(1,1,0,1,1) // CMN: 10001
+ && ( INSN0(8,4) == BITS5(1,1,0,1,1) // CMP
+ || INSN0(8,4) == BITS5(1,0,0,0,1)) // CMN
&& INSN1(15,15) == 0
&& INSN1(11,8) == BITS4(1,1,1,1)) {
UInt rN = INSN0(3,0);
UInt rM = INSN1(3,0);
if (!isBadRegT(rN) && !isBadRegT(rM)) {
- UInt how = INSN1(5,4);
- UInt imm5 = (INSN1(14,12) << 2) | INSN1(7,6);
+ Bool isCMN = INSN0(8,4) == BITS5(1,0,0,0,1);
+ UInt how = INSN1(5,4);
+ UInt imm5 = (INSN1(14,12) << 2) | INSN1(7,6);
IRTemp argL = newTemp(Ity_I32);
assign(argL, getIRegT(rN));
@@ -13800,9 +13808,10 @@
dis_buf, &argR, NULL, rMt, how, imm5, rM
);
- setFlags_D1_D2( ARMG_CC_OP_SUB, argL, argR, condT );
+ setFlags_D1_D2( isCMN ? ARMG_CC_OP_ADD : ARMG_CC_OP_SUB,
+ argL, argR, condT );
- DIP("cmp.w r%u, %s\n", rN, dis_buf);
+ DIP("%s.w r%u, %s\n", isCMN ? "cmn" : "cmp", rN, dis_buf);
goto decode_success;
}
}
|