diff options
Diffstat (limited to 'sim/common/sim-bits.h')
| -rw-r--r-- | sim/common/sim-bits.h | 40 |
1 files changed, 25 insertions, 15 deletions
diff --git a/sim/common/sim-bits.h b/sim/common/sim-bits.h index 3170c61..1433c4c 100644 --- a/sim/common/sim-bits.h +++ b/sim/common/sim-bits.h @@ -24,7 +24,7 @@ #define _SIM_BITS_H_ -/* bit manipulation routines: +/* Bit manipulation routines: Bit numbering: The bits are numbered according to the target ISA's convention. That being controlled by WITH_TARGET_WORD_MSB. For @@ -42,15 +42,17 @@ NB: Use EXTRACTED, MSEXTRACTED and LSEXTRACTED as a guideline for naming. LSMASK and LSMASKED are wrong. - BIT*(POS): Constant with just 1 bit set. + BIT*(POS): `*' bit constant with just 1 bit set. - LSBIT*(OFFSET): Constant with just 1 bit set - LS bit is zero. + LSBIT*(OFFSET): `*' bit constant with just 1 bit set - LS bit is + zero. - MSBIT*(OFFSET): Constant with just 1 bit set - MS bit is zero. + MSBIT*(OFFSET): `*' bit constant with just 1 bit set - MS bit is + zero. - MASK*(FIRST, LAST): Constant with bits [FIRST .. LAST] set. The - <MACRO> (no size) version permits FIRST >= LAST and generates a - wrapped bit mask vis ([0..LAST] | [FIRST..LSB]). + MASK*(FIRST, LAST): `*' bit constant with bits [FIRST .. LAST] + set. The <MACRO> (no size) version permits FIRST >= LAST and + generates a wrapped bit mask vis ([0..LAST] | [FIRST..LSB]). LSMASK*(FIRST, LAST): Like MASK - LS bit is zero. @@ -87,18 +89,26 @@ IEA_MASKED(SHOULD_MASK, ADDR): Convert the address to the targets natural size. If in 32bit mode, discard the high 32bits. - EXTENDED*(VALUE): Convert the `*' bit value to the targets natural - word size. Sign extned the value if needed. + EXTEND*(VALUE): Convert the `*' bit value to the targets natural + word size. Sign extend the value if needed. + + ALIGN_*(VALUE): Round the value upwards so that it is aligned to a + `_*' byte boundary. - ALIGN_*(VALUE): Round upwards the value so that it is aligned. + FLOOR_*(VALUE): Truncate the value so that it is aligned to a `_*' + byte boundary. - FLOOR_*(VALUE): Truncate the value so that it is aligned. + ROT*(VALUE, NR_BITS): Return the `*' bit VALUE rotated by NR_BITS + right (positive) or left (negative). - ROTL*(VALUE, NR_BITS): Return the value rotated by NR_BITS left. + ROTL*(VALUE, NR_BITS): Return the `*' bit value rotated by NR_BITS + left. 0 <= NR_BITS <= `*'. - ROTR*(VALUE, NR_BITS): Return the value rotated by NR_BITS right. + ROTR*(VALUE, NR_BITS): Return the `*' bit value rotated by NR_BITS + right. 0 <= NR_BITS <= N. - SEXT*(VAL, SIGN_BIT): Treat SIGN_BIT as the sign, extend it. + SEXT*(VALUE, SIGN_BIT): Treat SIGN_BIT as VALUEs sign, extend it ti + `*' bits. Note: Only the BIT* and MASK* macros return a constant that can be used in variable declarations. @@ -542,7 +552,7 @@ INLINE_SIM_BITS(unsigned_word) MSSEXT (signed_word val, int sign_bit); -#if ((SIM_BITS_INLINE & INCLUDE_MODULE) && (SIM_BITS_INLINE & INCLUDED_BY_MODULE)) +#if H_REVEALS_MODULE_P (SIM_BITS_INLINE) #include "sim-bits.c" #endif |