Description:

Reality Co-Processor of the Nintendo 64. Its main purpose is rendering and computing 3D graphics.

CPU clock speed:

62.5 MHz

Address bus:

0-Bit

CPU caches:

Name	Size	Comment
L1?	8 KB	4 KB for instructions and 4 KB for data

Document version:

1.0.0

Sources:

• https://github.com/martinlindhe/n64ops
• https://www.copetti.org/writings/consoles/nintendo-64
• https://n64brew.dev/wiki/Reality_Signal_Processor

Name	Description
v<dest>	The destination vector register, where the result will be placed.
del	Specifies the destination element to be used.
offset	16-bit additional offset to use from a base register.
base	The base GPR to use for load/store operations.
v<s1>	Source vector register.
v<s2>	Source vector register.
el	Specifies the element to be used on a source vector register.

Name	Value	Size (Bits)
r0/reg0	0x00	32
at/reg1	0x01	32
v0/reg2	0x02	32
v1/reg3	0x03	32
a0/reg4	0x04	32
a1/reg5	0x05	32
a2/reg6	0x06	32
a3/reg7	0x07	32
t0/reg8	0x08	32
t1/reg9	0x09	32
t2/reg10	0x0A	32
t3/reg11	0x0B	32
t4/reg12	0x0C	32
t5/reg13	0x0D	32
t6/reg14	0x0E	32
t7/reg15	0x0F	32
s0/reg16	0x10	32
s1/reg17	0x11	32
s2/reg18	0x12	32
s3/reg19	0x13	32
s4/reg20	0x14	32
s5/reg21	0x15	32
s6/reg22	0x16	32
s7/reg23	0x17	32
t8/reg24	0x18	32
t9/reg25	0x19	32
k0/reg26	0x1A	32
k1/reg27	0x1B	32
gp/reg28	0x1C	32
sp/reg29	0x1D	32
s8/reg30	0x1E	32
ra/reg31	0x1F	32

Name	Value	Size (Bits)
$v0	0x00	128
$v1	0x01	128
$v2	0x02	128
$v3	0x03	128
$v4	0x04	128
$v5	0x05	128
$v6	0x06	128
$v7	0x07	128
$v8	0x08	128
$v9	0x09	128
$v10	0x0A	128
$v11	0x0B	128
$v12	0x0C	128
$v13	0x0D	128
$v14	0x0E	128
$v15	0x0F	128
$v16	0x10	128
$v17	0x11	128
$v18	0x12	128
$v19	0x13	128
$v20	0x14	128
$v21	0x15	128
$v22	0x16	128
$v23	0x17	128
$v24	0x18	128
$v25	0x19	128
$v26	0x1A	128
$v27	0x1B	128
$v28	0x1C	128
$v29	0x1D	128
$v30	0x1E	128
$v31	0x1F	128

Opcode:

50

Format:

LBV $v[del], offset(base)

Purpose:

Load byte to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00000	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LSV $v[del], offset(base)

Purpose:

Load short (halfword) to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00001	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LLV $v[del], offset(base)

Purpose:

Load long (word) to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00010	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LDV $v[del], offset(base)

Purpose:

Load double to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00011	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LQV $v[del], offset(base)

Purpose:

Load quadword to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00100	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LRV $v[del], offset(base)

Purpose:

Load rest to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00101	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LPV $v[del], offset(base)

Purpose:

Load packed to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00110	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LUV $v[del], offset(base)

Purpose:

Load unpacked to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00111	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LHV $v[del], offset(base)

Purpose:

Load half to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01000	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LFV $v[del], offset(base)

Purpose:

Load fourth to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01001	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LWV $v[del], offset(base)

Purpose:

Load wrap to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01010	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

LTV $v[del], offset(base)

Purpose:

Load transpose to vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01011	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SBV $v[del], offset(base)

Purpose:

Store byte from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00000	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SSV $v[del], offset(base)

Purpose:

Store short (halfword) from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00001	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SLV $v[del], offset(base)

Purpose:

Store long (word) from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00010	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SDV $v[del], offset(base)

Purpose:

Store double (doubleword) from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00011	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SQV $v[del], offset(base)

Purpose:

Store quad (quadword) from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00100	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SRV $v[del], offset(base)

Purpose:

Store rest from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00101	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SPV $v[del], offset(base)

Purpose:

Store packed from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00110	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SUV $v[del], offset(base)

Purpose:

Store unpacked from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	00111	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SHV $v[del], offset(base)

Purpose:

Store half from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01000	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SFV $v[del], offset(base)

Purpose:

Store fourth from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01001	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

SWV $v[del], offset(base)

Purpose:

Store wrap from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01010	del	0	offset
6	5	5	5	4	1	6

Opcode:

50

Format:

STV $v[del], offset(base)

Purpose:

Store transpose from vector

Implementation:

Nothing or missing documentation

How to decode:

opcode	base	dest	01011	del	0	offset
6	5	5	5	4	1	6

Opcode:

18

Format:

VMULF $v, $v, $v[el]

Purpose:

Vector (Frac) Multiply

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000000
6	1	4	5	5	5	6

Opcode:

18

Format:

VMULU $v, $v, $v[el]

Purpose:

Vector (Unsigned Frac) Multiply

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000001
6	1	4	5	5	5	6

Opcode:

18

Format:

VRNDP $v, $v, $v[el]

Purpose:

Vector DCT Round (-)

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000010
6	1	4	5	5	5	6

Opcode:

18

Format:

VMULQ $v, $v, $v[el]

Purpose:

Vector (Integer) Multiply

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000011
6	1	4	5	5	5	6

Opcode:

18

Format:

VMUDL $v, $v, $v[el]

Purpose:

Vector low multiply

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000100
6	1	4	5	5	5	6

Opcode:

18

Format:

VMUDM $v, $v, $v[el]

Purpose:

Vector mid-m multiply

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000101
6	1	4	5	5	5	6

Opcode:

18

Format:

VMUDN $v, $v, $v[el]

Purpose:

Vector mid-n multiply

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000110
6	1	4	5	5	5	6

Opcode:

18

Format:

VMUDH $v, $v, $v[el]

Purpose:

Vector high multiply

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	000111
6	1	4	5	5	5	6

Opcode:

18

Format:

VMACF $v, $v, $v[el]

Purpose:

Vector (Frac) Multiply Accumulate

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001000
6	1	4	5	5	5	6

Opcode:

18

Format:

VMACU $v, $v, $v[el]

Purpose:

Vector (Unsigned Frac) Multiply Accumulate

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001001
6	1	4	5	5	5	6

Opcode:

18

Format:

VRNDN $v, $v, $v[el]

Purpose:

Vector DCT Round (-)

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001010
6	1	4	5	5	5	6

Opcode:

18

Format:

VMACQ $v, $v, $v[el]

Purpose:

Vector (Integer) Multiply Accumulate

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001011
6	1	4	5	5	5	6

Opcode:

18

Format:

VMADL $v, $v, $v[el]

Purpose:

Vector low multiply accumulate

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001100
6	1	4	5	5	5	6

Opcode:

18

Format:

VMADM $v, $v, $v[el]

Purpose:

Vector mid-m multiply accumulate

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001101
6	1	4	5	5	5	6

Opcode:

18

Format:

VMADN $v, $v, $v[el]

Purpose:

Vector mid-n multiply accumulate

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001110
6	1	4	5	5	5	6

Opcode:

18

Format:

VMADH $v, $v, $v[el]

Purpose:

Vector high multiply accumulate

Implementation:

Nothing or missing documentation

How to decode:

opcode	1	el	s2	s1	dest	001111
6	1	4	5	5	5	6