NVIDIA ISA Viewer

REDAS

Asynchronous Reduction on Distributed Shared Memory With Explicit Synchronization

2 variants on SM90 (H100)

REDAS

[R+UR],R

distilled: @P0 REDAS.ADD [R0.U32+UR0], R0 ;

key: REDAS_R_UR_R

0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7
0	1	1	1	1	1	0	1	1	0	1	1	pred				0	0	0	0	0	0	0	0	operand 0								operand 2								0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7
operand 1							0	modi	modi 1			0	modi 2				0	0	0	0	0	0	modi 3				1	0	0	0	0	0	0	0	0	0	0	0	0	0	stall				y	r-bar			w-bar			b-mask						reuse				0	0

Modifier Group 1

Binary	Value
000	(default)
001	S32
010	64
011	INVALID3
100	INVALID4
101	INVALID5
110	INVALID6
111	INVALID7

Modifier Group 2

Binary	Value
0000	(default)
0001	???0.PRIVATE
0010	???0.???1
0011	???0.???1.PRIVATE
0100	???2.PRIVATE
0101	???2.???1
0110	???3.PRIVATE
0111	???2.???3
1000	???3.???4
1001	???0.???2
1010	???2.SYS
1011	???0.???2.PRIVATE
1100	???3.SYS
1101	???0.???3
1110	???0.???3.PRIVATE
1111	???0.???4

Modifier Group 3

Binary	Value
0000	ADD
0001	MIN
0010	MAX
0011	INC
0100	DEC
0101	AND
0110	OR
0111	XOR
1000	INVALID8
1001	INVALID9
1010	INVALID10
1011	INVALID11
1100	INVALID12
1101	INVALID13
1110	INVALID14
1111	INVALID15

Operand 0 Modifiers

Binary	Value
0	U32
1	64

REDAS

[R+UR+I],R

distilled: @P0 REDAS.ADD [R0.U32+UR0+0x1], R0 ;

key: REDAS_R_UR_I_R

0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7
0	1	1	1	1	1	0	1	1	0	1	1	pred				0	0	0	0	0	0	0	0	operand 0								operand 3								operand 2
0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7
operand 1							0	modi	modi 1			0	modi 2				0	0	0	0	0	0	modi 3				1	0	0	0	0	0	0	0	0	0	0	0	0	0	stall				y	r-bar			w-bar			b-mask						reuse				0	0

Modifier Group 1

Binary	Value
000	(default)
001	S32
010	64
011	INVALID3
100	INVALID4
101	INVALID5
110	INVALID6
111	INVALID7

Modifier Group 2

Binary	Value
0000	(default)
0001	???0.PRIVATE
0010	???0.???1
0011	???0.???1.PRIVATE
0100	???2.PRIVATE
0101	???2.???1
0110	???3.PRIVATE
0111	???2.???3
1000	???3.???4
1001	???0.???2
1010	???2.SYS
1011	???0.???2.PRIVATE
1100	???3.SYS
1101	???0.???3
1110	???0.???3.PRIVATE
1111	???0.???4

Modifier Group 3

Binary	Value
0000	ADD
0001	MIN
0010	MAX
0011	INC
0100	DEC
0101	AND
0110	OR
0111	XOR
1000	INVALID8
1001	INVALID9
1010	INVALID10
1011	INVALID11
1100	INVALID12
1101	INVALID13
1110	INVALID14
1111	INVALID15

Operand 0 Modifiers

Binary	Value
0	U32
1	64