diff options
Diffstat (limited to 'include/opcode/riscv.h')
| -rw-r--r-- | include/opcode/riscv.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/opcode/riscv.h b/include/opcode/riscv.h index 6fdc9c9..faef28a 100644 --- a/include/opcode/riscv.h +++ b/include/opcode/riscv.h @@ -60,6 +60,7 @@ static const char * const riscv_pred_succ[16] = #define RV_X(x, s, n) (((x) >> (s)) & ((1 << (n)) - 1)) #define RV_IMM_SIGN(x) (-(((x) >> 31) & 1)) +#define RV_X_SIGNED(x, s, n) (RV_X(x, s, n) | ((-(RV_X(x, (s + n - 1), 1))) << (n))) #define EXTRACT_ITYPE_IMM(x) \ (RV_X(x, 20, 12) | (RV_IMM_SIGN(x) << 12)) @@ -347,6 +348,22 @@ static const char * const riscv_pred_succ[16] = #define EXTRACT_OPERAND(FIELD, INSN) \ EXTRACT_BITS ((INSN), OP_MASK_##FIELD, OP_SH_##FIELD) +/* Extract an unsigned immediate operand on position s with n bits. */ +#define EXTRACT_U_IMM(n, s, l) \ + RV_X (l, s, n) + +/* Extract an signed immediate operand on position s with n bits. */ +#define EXTRACT_S_IMM(n, s, l) \ + RV_X_SIGNED (l, s, n) + +/* Validate that unsigned n-bit immediate is within bounds. */ +#define VALIDATE_U_IMM(v, n) \ + ((unsigned long) v < (1UL << n)) + +/* Validate that signed n-bit immediate is within bounds. */ +#define VALIDATE_S_IMM(v, n) \ + (v < (long) (1UL << (n-1)) && v >= -(offsetT) (1UL << (n-1))) + /* The maximal number of subset can be required. */ #define MAX_SUBSET_NUM 4 |