CBHS (immediate)

Compare unsigned higher than or same as immediate and branch

This instruction compares the unsigned value in a register with an immediate, and conditionally branches to a label at a PC-relative offset if the register value is higher than or the same as the immediate. This instruction provides a hint that this is not a subroutine call or return. This instruction does not affect the condition flags.

This is a pseudo-instruction of CB<cc> (immediate). This means:

The encodings in this description are named to match the encodings of CB<cc> (immediate).
The assembler syntax is used only for assembly, and is not used on disassembly.
The description of CB<cc> (immediate) gives the operational pseudocode, any constrained unpredictable behavior, and any operational information for this instruction.

Branch class

(FEAT_CMPBR)

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
sf	1	1	1	0	1	0	1	0	1	0	imm6						0	imm9									Rt
								cc

32-bit higher encoding

(sf == 0)

CBHS <Wt>, #<immp1>, <label>

is equivalent to

CBHI <Wt>, #<imm>, <label>

64-bit higher encoding

(sf == 1)

CBHS <Xt>, #<immp1>, <label>

is equivalent to

CBHI <Xt>, #<imm>, <label>

Assembler Symbols

<Wt>	Is the 32-bit name of the general-purpose register to be tested, encoded in the "Rt" field.

<immp1>

Is an unsigned immediate, in the range 1 to 64, encoded as "imm6" plus 1.

<label>

Is the program label to be conditionally branched to. Its offset from the address of this instruction, in the range -1024 to 1020, is encoded as "imm9" times 4.

<Xt>	Is the 64-bit name of the general-purpose register to be tested, encoded in the "Rt" field.

Operation

The description of CB<cc> (immediate) gives the operational pseudocode for this instruction.