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cpu_core.h/cpu_core.c /
Specific CPU/compiler cpu_a.asm
Prototypes
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CPU_DATA CPU_CntLeadZeros (CPU_DATA val);
CPU_DATA CPU_CntLeadZeros08 (CPU_INT08U val);
CPU_DATA CPU_CntLeadZeros16 (CPU_INT16U val);
CPU_DATA CPU_CntLeadZeros32 (CPU_INT32U val);
CPU_DATA CPU_CntLeadZeros64 (CPU_INT64U val); |
Arguments
val
Data value to count leading zero bits.
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CPU_CntLeadZeros()
is available and implemented in cpu_core.c
if CPU_CFG_LEAD_ZEROS_ASM_PRESENT
is not #define'd
in cpu_cfg.h
(or cpu.h
), but should be implemented in cpu_a.asm
(or cpu_a.s
) if CPU_CFG_LEAD_ZEROS_ASM_PRESENT
is #define'd
in cpu_cfg.h
(or cpu.h
). Refer to Core Library Configuration for details.
Each CPU_CntLeadZerosXX()
is available and implemented in cpu_core.c
based on CPU_CFG_DATA_SIZE_MAX
configuration as #define'd
in cpu.h
:
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Notes / Warnings
None.
Example Usage
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CPU_DATA val;
CPU_DATA nbr_lead_zeros;
val = 0x0643A718;
nbr_lead_zeros = CPU_CntLeadZeros(val);
nbr_lead_zeros = CPU_CntLeadZeros08((CPU_INT08U)val);
nbr_lead_zeros = CPU_CntLeadZeros16((CPU_INT16U)val);
nbr_lead_zeros = CPU_CntLeadZeros32((CPU_INT32U)val);
nbr_lead_zeros = CPU_CntLeadZeros64((CPU_INT64U)val); |