Renesas M32R-FPU User Manual

3

3-2

M32R-FPU Software Manual (Rev.1.01)

3.1 Conventions for instruction description

Conventions for instruction description are summarized below.

S h o w s   t h e   m n e m o n i c   a n d   p o s s i b l e   o p e r a n d s   ( o p e r a t i o n   t a r g e t )   u s i n g   a s s e m b l y
language notation.

Table 3.1.1 Operand list

symbol(see note)

addressing mode

operation target

register direct

general-purpose registers (R0 - R15)

control register

M

control registers (CR0 = PSW, CR1 = CBR, CR2 = SPI,

CR3 = SPU, CR6 = BPC, CR7 = FPSR)

register indirect

memory specified by register contents as address

register relative

memory specified by (register contents) + (sign-extended value of

indirect

16-bit displacement) as address

register indirect and

Add 4 to register contents. (Register contents specify the memory

register update

address, then 4 is added to the contents.)

register indirect and

Add 4 to register contents. (4 is added to the register contents,

register update

then the register contents specify the memory address.)

register indirect and

Subtract 4 to register contents. (4 is subtract to the register

register update

contents, hen the register contents specify the memory address.)

immediate

immediate value (refer to each instruction description)

Bit position

Contents of byte data bit position

PC relative

memory specified by (PC contents) + (8, 16, or 24-bit displacement

which is sign-extended to 32 bits and 2 bits left-shifted) as address

Note: When expressing Rsrc or Rdest as an operand, a general-purpose register numbers (0 - 15) should be

substituted for src or dest. When expressing CRsrc or CRdest, control register numbers (0 - 3, 6, 7)
should be substituted for src or dest.

Indicates the operation performed by one instruction. Notation is in accordance with  C

language notation.

Table 3.1.2 Operation expression (operator)

operator

meaning

+

addition (binomial operator)

subtraction (binomial operator)

✽

multiplication (binomial operator)

/

division (binomial operator)

%

remainder operation (binomial operator)

++

increment (monomial operator)

decrement (monomial operator)

INSTRUCTIONS

3.1 Conventions for instruction description