NVIDIA ISA Viewer

UBLKRED

Bulk Data Copy from Shared Memory with Reduction

2 variants on SM90 (H100)

UBLKRED.???0

[UR],[UR],UR

distilled: @UP0 UBLKRED.G.???0.ADD [UR0], [UR0], UR0 ;

key: UBLKRED_UR_UR_UR

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
1	1	0	1	1	1	0	1	1	1	0	0	pred				0	0	0	0	0	0	0	0	operand 1							0	operand 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	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 2							0	0	modi 1		0	0	0	0	0	0	modi 2				0	0	modi 3			0	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
00	G
01	S
10	G.S
11	S.S

Modifier Group 2

Binary	Value
0000	(default)
0001	S32
0010	U64
0011	S64
0100	F16.RN
0101	F32.RN
0110	F32.FTZ.RN
0111	F64.RN
1000	BF16.RN
1001	INVALID9
1010	INVALID10
1011	INVALID11
1100	INVALID12
1101	INVALID13
1110	INVALID14
1111	INVALID15

Modifier Group 3

Binary	Value
000	ADD
001	MIN
010	MAX
011	INC
100	DEC
101	AND
110	OR
111	XOR

UBLKRED.???0

[UR],[UR],UR,desc[UR]

distilled: @UP0 UBLKRED.G.???0.ADD [UR0], [UR0], UR0, desc[UR0] ;

key: UBLKRED_UR_UR_UR_UR

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
1	1	0	1	1	1	0	1	1	1	0	0	pred				0	0	0	0	0	0	0	0	operand 1							0	operand 0							0	operand 3							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 2							0	0	modi 1		0	1	0	0	0	0	modi 2				0	0	modi 3			0	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
00	G
01	S
10	G.S
11	S.S

Modifier Group 2

Binary	Value
0000	(default)
0001	S32
0010	U64
0011	S64
0100	F16.RN
0101	F32.RN
0110	F32.FTZ.RN
0111	F64.RN
1000	BF16.RN
1001	INVALID9
1010	INVALID10
1011	INVALID11
1100	INVALID12
1101	INVALID13
1110	INVALID14
1111	INVALID15

Modifier Group 3

Binary	Value
000	ADD
001	MIN
010	MAX
011	INC
100	DEC
101	AND
110	OR
111	XOR