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Correct test for ISA dependent bits

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This commit is contained in:
Gavin Romig-Koch 1997-02-20 15:48:57 +00:00
parent 8f06365c2f
commit 528031fd49
1 changed files with 18 additions and 6 deletions
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24
sim/mips/gencode.c
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@ -450,7 +450,19 @@ typedef struct instruction {
the normal instruction space. */
#define MASK_ISA (0x000000FF) /* Start by leaving 8bits for the ISA ID */
/* The other bits are allocated downwards, to avoid renumbering if we
have to extend the bits allocated to the pure ISA number. */
have to extend the bits allocated to the pure ISA number.
These architecture bits come in two flavors:
ISA dependent - marking insns that should be included in the opcode
set if that architecture is requested on the gencode command line
AND the ISA of the insn is <= requested ISA;
ISA independent - marking insn that should be included in the opcode
set if that architecture is requested
OR the ISA of the insn is <= requested ISA.
Independent bits are listed in MASK_ISA_INDEP, the rest are dependent.
*/
#define ARCH_VR4100 ((unsigned)1 << 31) /* NEC VR4100 extension instructions */
/* start-sanitize-r5900 */
#define ARCH_R5900 ((unsigned)1 << 30) /* Toshiba r5900 extension instructions */
@ -463,7 +475,7 @@ typedef struct instruction {
/* end-sanitize-r5900 */ \
| 0)
#define MASK_ISA_DEP ~(MASK_ISA_INDEP | MASK_ISA)
/* Very short names for use in the table below to keep it neet. */
@ -1842,10 +1854,10 @@ process_instructions(doarch,features)
valid, then if the instruction matches any of the
architecture specific flags. NOTE: We allow a selected ISA of
zero to be used to match all standard instructions. */
if (((MIPS_DECODE[loop].isa & doarch & MASK_ISA_INDEP)
|| (((MIPS_DECODE[loop].isa & MASK_ISA) <= doisa)
&& (((MIPS_DECODE[loop].isa & ~MASK_ISA) == 0)
|| ((MIPS_DECODE[loop].isa & ~MASK_ISA) & doarch) != 0)))
unsigned int isa = MIPS_DECODE[loop].isa;
if (((isa & doarch & MASK_ISA_INDEP)
|| (((isa & MASK_ISA) <= doisa)
&& (((isa & MASK_ISA_DEP) == 0) || ((isa & MASK_ISA_DEP) & doarch) != 0)))
&& (!(MIPS_DECODE[loop].flags & FP) || ((MIPS_DECODE[loop].flags & FP) && dofp))) {
unsigned int onemask;
unsigned int zeromask;