#include "sim-xcat.h"
-/* 32bit target expressions:
- Each calculation is performed three times using each of the
- signed64, unsigned64 and long integer types. The macro ALU_END
- (in _ALU_RESULT_VAL) then selects which of the three alternative
- results will be used in the final assignment of the target
- register. As this selection is determined at compile time by
- fields in the instruction (OE, EA, Rc) the compiler has sufficient
- information to firstly simplify the selection code into a single
- case and then back anotate the equations and hence eliminate any
- resulting dead code. That dead code being the calculations that,
- as it turned out were not in the end needed.
+/* Binary addition, carry and overflow:
- 64bit arrithemetic is used firstly because it allows the use of
- gcc's efficient long long operators (typically efficiently output
- inline) and secondly because the resultant answer will contain in
- the low 32bits the answer while in the high 32bits is either carry
- or status information. */
+ Overflow - method 1:
+ Overflow occures when the sign of the two operands is identical but
+ different to the sign of the result:
-/* 16bit target expressions:
+ SIGN_BIT (~(a ^ b) & ((a + b) ^ b))
- These are a simplified version of the 32bit target expressions */
+ Note that, for subtraction, care must be taken with MIN_INTn.
+ Overflow - method 2:
-/* 64bit target expressions:
+ The two N bit operands are sign extended to M>N bits and then
+ added. Overflow occures when SIGN_BIT<n> and SIGN_BIT<m> do not
+ match.
+
+ SIGN_BIT (r >> (M-N) ^ r)
- Unfortunatly 128bit arrithemetic isn't that common. Consequently
- the 32/64 bit trick can not be used. Instead all calculations are
- required to retain carry/overflow information in separate
- variables. Even with this restriction it is still possible for the
- trick of letting the compiler discard the calculation of unneeded
- values */
+ Overflow - method 3:
-/* Start a section of ALU code */
+ The two N bit operands are sign extended to M>N bits and then
+ added. Overflow occures when the result is outside of signextended
+ MIN_INTn, MAX_INTn.
-#define ALU16_BEGIN(VAL) \
-{ \
- signed_word alu_carry_val; \
- unsigned_word alu_overflow_val; \
- ALU16_SET(VAL)
-#define ALU32_BEGIN(VAL) \
-{ \
- natural_word alu_val; \
- unsigned64 alu_carry_val; \
- signed64 alu_overflow_val; \
- ALU32_SET(VAL)
+ Overflow - method 4:
+
+ Given the carry bit, the overflow can be computed using the
+ equation:
+
+ SIGN_BIT (((A ^ B) ^ R) ^ C)
+
+ As shown in the table below:
+
+ I A B R C | V | A^B ^R ^C
+ ---------------+---+-------------
+ 0 0 0 0 0 | 0 | 0 0 0
+ 0 0 1 1 0 | 0 | 1 0 0
+ 0 1 0 1 0 | 0 | 1 0 0
+ 0 1 1 0 1 | 1 | 0 0 1
+ 1 0 0 1 0 | 1 | 0 1 1
+ 1 0 1 0 1 | 0 | 1 1 0
+ 1 1 0 0 1 | 0 | 1 1 0
+ 1 1 1 1 1 | 0 | 0 1 0
+
+
+
+ Carry - method 1:
+
+ Consider the truth table (carryIn, Result, Carryout, Result):
+
+ I A B R | C
+ ------------+---
+ 0 0 0 0 | 0
+ 0 0 1 1 | 0
+ 0 1 0 1 | 0
+ 0 1 1 0 | 1
+ 1 0 0 1 | 0
+ 1 0 1 0 | 1
+ 1 1 0 0 | 1
+ 1 1 1 1 | 1
+
+ Looking at the terms A, B and R we want an equation for C.
+
+ AB\R 0 1
+ +-------
+ 00 | 0 0
+ 01 | 1 0
+ 11 | 1 1
+ 10 | 1 0
+
+ This giving us the sum-of-prod equation:
+
+ SIGN_BIT ((A & B) | (A & ~R) | (B & ~R))
+
+ Verifying:
+
+ I A B R | C | A&B A&~R B&~R
+ ------------+---+---------------
+ 0 0 0 0 | 0 | 0 0 0
+ 0 0 1 1 | 0 | 0 0 0
+ 0 1 0 1 | 0 | 0 0 0
+ 0 1 1 0 | 1 | 1 1 1
+ 1 0 0 1 | 0 | 0 0 0
+ 1 0 1 0 | 1 | 0 0 1
+ 1 1 0 0 | 1 | 0 1 0
+ 1 1 1 1 | 1 | 1 0 0
+
+
+
+ Carry - method 2:
+
+ Given two signed N bit numbers, a carry can be detected by treating
+ the numbers as N bit unsigned and adding them using M>N unsigned
+ arrithmetic. Carry is indicated by bit (1 << N) being set (result
+ >= 2**N).
+
+ SIGN_BITm (r)
-#define ALU64_BEGIN(VAL) \
-{ \
- natural64 alu_val; \
- unsigned64 alu_carry_val; \
- signed64 alu_overflow_val; \
- ALU64_SET(VAL)
+ Carry - method 3:
-#define ALU_BEGIN(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_BEGIN)(VAL)
+ Given the overflow bit. The carry can be computed from:
-/* More basic alu operations */
+ (~R&V) | (R&V)
+ Carry - method 4:
+ Add the two signed N bit numbers as unsigned N bit numbers, and then
+ compare the result to either one of the inputs via unsigned compare.
+ If the result is less than the inputs, carry occurred.
+
+ C = ((unsigned)(a+b)) < (unsigned)a if adding
+ (or)
+ C = (unsigned)a < (unsigned)b if subtracting
+ */
+
+
+
+/* 8 bit target expressions:
+
+ Since the host's natural bitsize > 8 bits, carry method 2 and
+ overflow method 2 are used. */
+
+#define ALU8_BEGIN(VAL) \
+signed alu8_cr = (unsigned8) (VAL); \
+unsigned alu8_vr = (signed8) (alu8_cr)
+
+#define ALU8_SET(VAL) \
+alu8_cr = (unsigned8) (VAL); \
+alu8_vr = (signed8) (alu8_cr)
+
+#define ALU8_SET_CARRY(CARRY) \
+do { \
+ if (CARRY) \
+ alu8_cr |= ((signed)-1) << 8; \
+ else \
+ alu8_cr &= 0xff; \
+} while (0)
+
+#define ALU8_HAD_CARRY (alu8_cr & LSBIT32(8))
+#define ALU8_HAD_OVERFLOW (((alu8_vr >> 8) ^ alu8_vr) & LSBIT32 (8-1))
+
+#define ALU8_RESULT ((unsigned8) alu8_cr)
+#define ALU8_CARRY_RESULT ((unsigned8) alu8_cr)
+#define ALU8_OVERFLOW_RESULT ((unsigned8) alu8_vr)
+
+/* #define ALU8_END ????? - target dependant */
+
+
+
+/* 16 bit target expressions:
+
+ Since the host's natural bitsize > 16 bits, carry method 2 and
+ overflow method 2 are used. */
+
+#define ALU16_BEGIN(VAL) \
+signed alu16_cr = (unsigned16) (VAL); \
+unsigned alu16_vr = (signed16) (alu16_cr)
#define ALU16_SET(VAL) \
-do { \
- alu_carry_val = (unsigned16)(VAL); \
- alu_overflow_val = (signed16)(VAL); \
+alu16_cr = (unsigned16) (VAL); \
+alu16_vr = (signed16) (alu16_cr)
+
+#define ALU16_SET_CARRY(CARRY) \
+do { \
+ if (CARRY) \
+ alu16_cr |= ((signed)-1) << 16; \
+ else \
+ alu16_cr &= 0xffff; \
} while (0)
+#define ALU16_HAD_CARRY (alu16_cr & LSBIT32(16))
+#define ALU16_HAD_OVERFLOW (((alu16_vr >> 16) ^ alu16_vr) & LSBIT32 (16-1))
+
+#define ALU16_RESULT ((unsigned16) alu16_cr)
+#define ALU16_CARRY_RESULT ((unsigned16) alu16_cr)
+#define ALU16_OVERFLOW_RESULT ((unsigned16) alu16_vr)
+
+/* #define ALU16_END ????? - target dependant */
+
+
+
+/* 32 bit target expressions:
+
+ Since most hosts do not support 64 (> 32) bit arrithmetic, carry
+ method 4 and overflow method 4 are used.
+
+ FIXME: 64 bit hosts should use the same method as for the 16 bit
+ ALU. */
+
+#define ALU32_BEGIN(VAL) \
+unsigned32 alu32_r = (VAL); \
+int alu32_c = 0; \
+int alu32_v = 0
+
#define ALU32_SET(VAL) \
-do { \
- alu_val = (unsigned32)(VAL); \
- alu_carry_val = (unsigned32)(alu_val); \
- alu_overflow_val = (signed32)(alu_val); \
-} while (0)
+alu32_r = (VAL); \
+alu32_c = 0; \
+alu32_v = 0
+
+#define ALU32_SET_CARRY(CARRY) alu32_c = (CARRY)
+
+#define ALU32_HAD_OVERFLOW (alu32_v)
+#define ALU32_HAD_CARRY (alu32_c)
+
+#define ALU32_RESULT (alu32_r)
+#define ALU32_CARRY_RESULT (alu32_r)
+#define ALU32_OVERFLOW_RESULT (alu32_r)
+
+
+
+/* 64 bit target expressions:
+
+ Even though the host typically doesn't support native 64 bit
+ arrithmetic, it is still used. */
+
+#define ALU64_BEGIN(VAL) \
+natural64 alu64_r = (VAL); \
+int alu64_c = 0; \
+int alu64_v = 0
#define ALU64_SET(VAL) \
-do { \
- alu_val = (VAL); \
- alu_carry_val = ((unsigned64)alu_val) >> 32; \
- alu_overflow_val = ((signed64)alu_val) >> 32; \
-} while (0)
+alu64_r = (VAL); \
+alu64_c = 0; \
+alu64_v = 0
+
+#define ALU64_SET_CARRY(CARRY) alu64_c = (CARRY)
+
+#define ALU64_HAD_CARRY (alu64_c)
+#define ALU64_HAD_OVERFLOW (alu64_v)
+
+#define ALU64_RESULT (alu64_r)
+#define ALU64_CARRY_RESULT (alu64_r)
+#define ALU64_OVERFLOW_RESULT (alu64_r)
+
+
+
+/* Generic versions of above macros */
+
+#define ALU_BEGIN XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_BEGIN)
+#define ALU_SET XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_SET)
+#define ALU_SET_CARRY XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_SET_CARRY)
+
+#define ALU_HAD_OVERFLOW XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_HAD_OVERFLOW)
+#define ALU_HAD_CARRY XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_HAD_CARRY)
+
+#define ALU_RESULT XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_RESULT)
+#define ALU_OVERFLOW_RESULT XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_OVERFLOW_RESULT)
+#define ALU_CARRY_RESULT XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_CARRY_RESULT)
-#define ALU_SET(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_SET)(VAL)
+/* Basic operations */
-#define ALU16_ADD(VAL) \
-do { \
- alu_carry_val += (unsigned16)(VAL); \
- alu_overflow_val += (signed16)(VAL); \
+#define ALU8_ADD(VAL) \
+do { \
+ unsigned8 alu8_tmp = (VAL); \
+ alu8_cr += (unsigned8)(alu8_tmp); \
+ alu8_vr += (signed8)(alu8_tmp); \
} while (0)
-#define ALU32_ADD(VAL) \
-do { \
- alu_val += (VAL); \
- alu_carry_val += (unsigned32)(VAL); \
- alu_overflow_val += (signed32)(VAL); \
+#define ALU16_ADD(VAL) \
+do { \
+ unsigned16 alu16_tmp = (VAL); \
+ alu16_cr += (unsigned16)(alu16_tmp); \
+ alu16_vr += (signed16)(alu16_tmp); \
} while (0)
-#define ALU64_ADD(VAL) \
-do { \
- unsigned64 val = (VAL); \
- unsigned64 alu_lo = alu_val + val; \
- signed alu_carry = ((alu_lo & LSBIT64 (31)) != 0); \
- alu_carry_val = (alu_carry_val \
- + MSEXTRACTED64 (val, 0, 31) \
- + alu_carry); \
- alu_overflow_val = (alu_overflow_val \
- + MSEXTRACTED64 (val, 0, 31) \
- + alu_carry); \
- alu_val = alu_val + val; \
+#define ALU32_ADD(VAL) \
+do { \
+ unsigned32 alu32_tmp = (unsigned32) (VAL); \
+ unsigned32 alu32_sign = alu32_tmp ^ alu32_r; \
+ alu32_r += (alu32_tmp); \
+ alu32_c = (alu32_r < alu32_tmp); \
+ alu32_v = ((alu32_sign ^ - (unsigned32)alu32_c) ^ alu32_r) >> 31; \
+} while (0)
+
+#define ALU64_ADD(VAL) \
+do { \
+ unsigned64 alu64_tmp = (unsigned64) (VAL); \
+ unsigned64 alu64_sign = alu64_tmp ^ alu64_r; \
+ alu64_r += (alu64_tmp); \
+ alu64_c = (alu64_r < alu64_tmp); \
+ alu64_v = ((alu64_sign ^ - (unsigned64)alu64_c) ^ alu64_r) >> 63; \
} while (0)
#define ALU_ADD(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_ADD)(VAL)
+#define ALU8_ADD_CA(VAL) \
+do { \
+ unsigned8 alu8_ca_tmp = (VAL) + ALU8_HAD_CARRY; \
+ ALU8_ADD(alu8_ca_tmp); \
+} while (0)
-#define ALU16_ADD_CA \
-do { \
- signed carry = ALU_CARRY; \
- ALU16_ADD(carry); \
+#define ALU16_ADD_CA(VAL) \
+do { \
+ unsigned16 alu16_ca_tmp = (VAL) + ALU16_HAD_CARRY; \
+ ALU16_ADD(alu16_ca_tmp); \
} while (0)
-#define ALU32_ADD_CA \
-do { \
- signed carry = ALU_CARRY; \
- ALU32_ADD(carry); \
+#define ALU32_ADD_CA(VAL) \
+do { \
+ unsigned32 alu32_ca_tmp = (VAL) + ALU32_HAD_CARRY; \
+ ALU32_ADD(alu32_ca_tmp); \
} while (0)
-#define ALU64_ADD_CA \
-do { \
- signed carry = ALU_CARRY; \
- ALU64_ADD(carry); \
+#define ALU64_ADD_CA(VAL) \
+do { \
+ unsigned64 alu64_ca_tmp = (VAL) + ALU64_HAD_CARRY; \
+ ALU64_ADD(alu64_ca_tmp); \
} while (0)
-#define ALU_ADD_CA XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_ADD_CA)
+#define ALU_ADD_CA(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_ADD_CA)(VAL)
+/* Remember: Hardware implements subtract as an ADD with a carry in of
+ 1 into the least significant bit */
-#define ALU16_SUB(VAL) \
-do { \
- alu_carry_val -= (unsigned16)(VAL); \
- alu_overflow_val -= (signed16)(VAL); \
+#define ALU8_SUB(VAL) \
+do { \
+ signed alu8sub_val = ~(VAL); \
+ ALU8_ADD (alu8sub_val); \
+ ALU8_ADD (1); \
} while (0)
-#define ALU32_SUB(VAL) \
-do { \
- alu_val -= (VAL); \
- alu_carry_val -= (unsigned32)(VAL); \
- alu_overflow_val -= (signed32)(VAL); \
+#define ALU16_SUB(VAL) \
+do { \
+ signed alu16sub_val = ~(VAL); \
+ ALU16_ADD (alu16sub_val); \
+ ALU16_ADD (1); \
} while (0)
-#define ALU64_SUB(VAL) \
-do { \
- signed64 subval = -(VAL); /* -MININT? */ \
- ALU64_ADD (subval); \
+#define ALU32_SUB(VAL) \
+do { \
+ unsigned32 alu32_tmp = (unsigned32) (VAL); \
+ unsigned32 alu32_sign = alu32_tmp ^ alu32_r; \
+ alu32_c = (alu32_r < alu32_tmp); \
+ alu32_r -= (alu32_tmp); \
+ alu32_v = ((alu32_sign ^ - (unsigned32)alu32_c) ^ alu32_r) >> 31; \
+} while (0)
+
+#define ALU64_SUB(VAL) \
+do { \
+ unsigned64 alu64_tmp = (unsigned64) (VAL); \
+ unsigned64 alu64_sign = alu64_tmp ^ alu64_r; \
+ alu64_c = (alu64_r < alu64_tmp); \
+ alu64_r -= (alu64_tmp); \
+ alu64_v = ((alu64_sign ^ - (unsigned64)alu64_c) ^ alu64_r) >> 63; \
} while (0)
#define ALU_SUB(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_SUB)(VAL)
-#define ALU16_SUB_CA \
-do { \
- signed carry = ALU_CARRY; \
- ALU16_SUB(carry); \
+#define ALU8_SUB_CA(VAL) \
+do { \
+ unsigned8 alu8_ca_tmp = (VAL) + ALU8_HAD_CARRY; \
+ ALU8_SUB(alu8_ca_tmp); \
} while (0)
-#define ALU32_SUB_CA \
-do { \
- signed carry = ALU_CARRY; \
- ALU32_SUB(carry); \
+#define ALU16_SUB_CA(VAL) \
+do { \
+ unsigned16 alu16_ca_tmp = (VAL) + ALU16_HAD_CARRY; \
+ ALU16_SUB(alu16_ca_tmp); \
} while (0)
-#define ALU64_SUB_CA \
-do { \
- signed carry = ALU_CARRY; \
- ALU64_SUB(carry); \
+#define ALU32_SUB_CA(VAL) \
+do { \
+ unsigned32 alu32_ca_tmp = (VAL) + ALU32_HAD_CARRY; \
+ ALU32_SUB(alu32_ca_tmp); \
} while (0)
-#define ALU_SUB_CA XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_SUB_CA)
+#define ALU64_SUB_CA(VAL) \
+do { \
+ unsigned64 alu64_ca_tmp = (VAL) + ALU64_HAD_CARRY; \
+ ALU64_SUB(alu64_ca_tmp); \
+} while (0)
+#define ALU_SUB_CA(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_SUB_CA)(VAL)
-#define ALU16_OR(VAL) \
-do { \
- error("ALU16_OR"); \
+#define ALU16_OR(VAL) \
+do { \
+ error("ALU16_OR"); \
} while (0)
-#define ALU32_OR(VAL) \
-do { \
- alu_val |= (VAL); \
- alu_carry_val = (unsigned32)(alu_val); \
- alu_overflow_val = (signed32)(alu_val); \
+#define ALU32_OR(VAL) \
+do { \
+ alu32_r |= (VAL); \
+ alu32_c = 0; \
+ alu32_v = 0; \
} while (0)
-#define ALU64_OR(VAL) \
-do { \
- error("ALU_OR64"); \
+#define ALU64_OR(VAL) \
+do { \
+ alu64_r |= (VAL); \
+ alu64_c = 0; \
+ alu64_v = 0; \
} while (0)
#define ALU_OR(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_OR)(VAL)
-
-#define ALU16_XOR(VAL) \
-do { \
- error("ALU16_XOR"); \
+#define ALU16_XOR(VAL) \
+do { \
+ error("ALU16_XOR"); \
} while (0)
-#define ALU32_XOR(VAL) \
-do { \
- alu_val ^= (VAL); \
- alu_carry_val = (unsigned32)(alu_val); \
- alu_overflow_val = (signed32)(alu_val); \
+#define ALU32_XOR(VAL) \
+do { \
+ alu32_r ^= (VAL); \
+ alu32_c = 0; \
+ alu32_v = 0; \
} while (0)
-#define ALU64_XOR(VAL) \
-do { \
- error("ALU_XOR64"); \
+#define ALU64_XOR(VAL) \
+do { \
+ alu64_r ^= (VAL); \
+ alu64_c = 0; \
+ alu64_v = 0; \
} while (0)
#define ALU_XOR(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_XOR)(VAL)
-#define ALU16_NEGATE \
-do { \
- error("ALU_NEGATE16"); \
+#define ALU8_NEGATE() \
+do { \
+ signed alu8neg_val = ~(ALU8_RESULT); \
+ ALU8_SET (1); \
+ ALU8_ADD (alu8neg_val); \
+} while (0)
+
+#define ALU16_NEGATE() \
+do { \
+ signed alu16neg_val = ~(ALU16_RESULT); \
+ ALU16_SET (1); \
+ ALU16_ADD (alu16neg_val); \
} while (0)
-#define ALU32_NEGATE \
-do { \
- alu_val = -alu_val; \
- alu_carry_val = -alu_carry_val; \
- alu_overflow_val = -alu_overflow_val; \
+#define ALU32_NEGATE() \
+do { \
+ unsigned32 alu32_tmp_orig = alu32_r; \
+ ALU32_SET (0); \
+ ALU32_SUB (alu32_tmp_orig); \
} while(0)
-#define ALU64_NEGATE \
-do { \
- error("ALU_NEGATE64"); \
+#define ALU64_NEGATE() \
+do { \
+ unsigned64 alu64_tmp_orig = alu64_r; \
+ ALU64_SET (0); \
+ ALU64_SUB (alu64_tmp_orig); \
} while (0)
#define ALU_NEGATE XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_NEGATE)
-#define ALU16_AND(VAL) \
-do { \
- error("ALU_AND16"); \
+#define ALU16_AND(VAL) \
+do { \
+ error("ALU_AND16"); \
} while (0)
-#define ALU32_AND(VAL) \
-do { \
- alu_val &= (VAL); \
- alu_carry_val = (unsigned32)(alu_val); \
- alu_overflow_val = (signed32)(alu_val); \
+#define ALU32_AND(VAL) \
+do { \
+ alu32_r &= (VAL); \
+ alu32_r = 0; \
+ alu32_v = 0; \
} while (0)
-#define ALU64_AND(VAL) \
-do { \
- error("ALU_AND64"); \
+#define ALU64_AND(VAL) \
+do { \
+ alu64_r &= (VAL); \
+ alu64_r = 0; \
+ alu64_v = 0; \
} while (0)
#define ALU_AND(VAL) XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_AND)(VAL)
-#define ALU16_NOT(VAL) \
-do { \
- error("ALU_NOT16"); \
+#define ALU16_NOT(VAL) \
+do { \
+ error("ALU_NOT16"); \
} while (0)
-#define ALU32_NOT \
-do { \
- signed64 new_alu_val = ~alu_val; \
- ALU_SET(new_alu_val); \
+#define ALU32_NOT \
+do { \
+ alu32_r = ~alu32_r; \
+ alu32_c = 0; \
+ alu32_v = 0; \
} while (0)
-#define ALU64_NOT \
-do { \
- error("ALU_NOT64"); \
+#define ALU64_NOT \
+do { \
+ alu64_r = ~alu64_r; \
+ alu64_c = 0; \
+ alu64_v = 0; \
} while (0)
#define ALU_NOT XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_NOT)
-
-
-/* Make available various results */
-
-
-/* overflow occures if the sign bit differs from the carry bit */
-
-#define ALU16_HAD_OVERFLOW \
- (!(alu_overflow_val & MSBIT32 (0)) != !(alu_overflow_val & MSBIT32 (16)))
-
-#define ALU32_HAD_OVERFLOW \
- ((((unsigned64)(alu_overflow_val & MSBIT64(0))) >> 32) \
- != (unsigned64)(alu_overflow_val & MSBIT64(32)))
-
-#define ALU64_HAD_OVERFLOW \
- ((alu_val & MSBIT64 (0)) != (alu_overflow_val & MSBIT64 (0)))
-
-#define ALU_HAD_OVERFLOW XCONCAT3(ALU,WITH_TARGET_WORD_BITSIZE,_HAD_OVERFLOW)
-
-
-/* carry found in bit before sign */
-
-#define ALU16_HAD_CARRY \
- (alu_carry_val & MSBIT32(16))
-
-#define ALU32_HAD_CARRY \
- (alu_carry_val & MSBIT64(31))
-
-
#endif
projects / binutils-gdb.git / commitdiff