Chapter 41. v850 Dependent Features

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.offset

expression

Moves the offset into the current section to the specified amount.

.section "name",

type

This is an extension to the standard .section directive. It sets the current section to be

type

and creates an alias for this section called "name".

.v850

Specifies that the assembled code should be marked as being targeted at the V850 processor. This

allows the linker to detect attempts to link such code with code assembled for other processors.

.v850e

Specifies that the assembled code should be marked as being targeted at the V850E processor.

This allows the linker to detect attempts to link such code with code assembled for other proces 

sors.

.v850e1

Specifies that the assembled code should be marked as being targeted at the V850E1 proces 

sor. This allows the linker to detect attempts to link such code with code assembled for other

processors.

41.5. Opcodes

as

implements all the standard V850 opcodes.

as

also implements the following pseudo ops:

hi0()

Computes the higher 16 bits of the given expression and stores it into the immediate operand

field of the given instruction. For example:

mulhi hi0(here   there), r5, r6

computes the difference between the address of labels 'here' and 'there', takes the upper 16 bits

of this difference, shifts it down 16 bits and then mutliplies it by the lower 16 bits in register 5,

putting the result into register 6.

lo()

Computes the lower 16 bits of the given expression and stores it into the immediate operand field

of the given instruction. For example:

addi lo(here   there), r5, r6

computes the difference between the address of labels 'here' and 'there', takes the lower 16 bits

of this difference and adds it to register 5, putting the result into register 6.

hi()

Computes the higher 16 bits of the given expression and then adds the value of the most signif 

icant bit of the lower 16 bits of the expression and stores the result into the immediate operand

field of the given instruction. For example the following code can be used to compute the address

of the label 'here' and store it into register 6: