Version 4 (modified by trac, 8 years ago) (diff) |
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GCN ISA FLAT instructions
These instructions allow to access to main memory, LDS and VGPR registers. FLAT instructions fetch address from 2 vector registers that hold 64-bit address. FLAT instruction presents only in GCN 1.1 architecture.
List of fields for the FLAT encoding (GCN 1.1):
Bits | Name | Description |
---|---|---|
16 | GLC | Operation globally coherent |
17 | SLC | System level coherent |
18-24 | OPCODE | Operation code |
25-31 | ENCODING | Encoding type. Must be 0b110111 |
32-39 | VADDR | Vector address registers |
40-47 | VDATA | Vector data register |
55 | TFE | Texture Fail Enable ??? |
56-63 | VDST | Vector destination register |
Instruction syntax: INSTRUCTION VDST, VADDR(2) [MODIFIERS]
Instruction syntax: INSTRUCTION VADDR(2), VDATA [MODIFIERS]
Modifiers can be supplied in any order. Modifiers list: SLC, GLC, TFE. The TFE flag requires additional the VDATA register.
FLAT instruction can complete out of order with each other. This can be caused by different resources from/to that instruction can load/store. FLAT instruction increase VMCNT if access to main memory, or LKGMCNT if accesses to LDS.
Instructions by opcode
List of the FLAT instructions by opcode (GCN 1.1/1.2):
Opcode | Mnemonic (GCN1.1) | Mnemonic (GCN1.2) |
---|---|---|
8 (0x8) | FLAT_LOAD_UBYTE | -- |
9 (0x9) | FLAT_LOAD_SBYTE | -- |
10 (0xa) | FLAT_LOAD_USHORT | -- |
11 (0xb) | FLAT_LOAD_SSHORT | -- |
12 (0xc) | FLAT_LOAD_DWORD | -- |
13 (0xd) | FLAT_LOAD_DWORDX2 | -- |
14 (0xe) | FLAT_LOAD_DWORDX4 | -- |
15 (0xf) | FLAT_LOAD_DWORDX3 | -- |
16 (0x10) | -- | FLAT_LOAD_UBYTE |
17 (0x11) | -- | FLAT_LOAD_SBYTE |
18 (0x12) | -- | FLAT_LOAD_USHORT |
19 (0x13) | -- | FLAT_LOAD_SSHORT |
20 (0x14) | -- | FLAT_LOAD_DWORD |
21 (0x15) | -- | FLAT_LOAD_DWORDX2 |
22 (0x16) | -- | FLAT_LOAD_DWORDX3 |
23 (0x17) | -- | FLAT_LOAD_DWORDX4 |
24 (0x18) | FLAT_STORE_BYTE | FLAT_STORE_BYTE |
26 (0x1a) | FLAT_STORE_SHORT | FLAT_STORE_SHORT |
28 (0x1c) | FLAT_STORE_DWORD | FLAT_STORE_DWORD |
29 (0x1d) | FLAT_STORE_DWORDX2 | FLAT_STORE_DWORDX2 |
30 (0x1e) | FLAT_STORE_DWORDX4 | FLAT_STORE_DWORDX3 |
31 (0x1f) | FLAT_STORE_DWORDX3 | FLAT_STORE_DWORDX4 |
48 (0x30) | FLAT_ATOMIC_SWAP | -- |
49 (0x31) | FLAT_ATOMIC_CMPSWAP | -- |
50 (0x32) | FLAT_ATOMIC_ADD | -- |
52 (0x34) | FLAT_ATOMIC_SUB | -- |
53 (0x35) | FLAT_ATOMIC_SMIN | -- |
54 (0x36) | FLAT_ATOMIC_UMIN | -- |
55 (0x37) | FLAT_ATOMIC_SMAX | -- |
56 (0x38) | FLAT_ATOMIC_UMAX | -- |
57 (0x39) | FLAT_ATOMIC_AND | -- |
58 (0x3a) | FLAT_ATOMIC_OR | -- |
59 (0x3b) | FLAT_ATOMIC_XOR | -- |
60 (0x3c) | FLAT_ATOMIC_INC | -- |
61 (0x3d) | FLAT_ATOMIC_DEC | -- |
62 (0x3e) | FLAT_ATOMIC_FCMPSWAP | -- |
63 (0x3f) | FLAT_ATOMIC_FMIN | -- |
64 (0x40) | FLAT_ATOMIC_FMAX | FLAT_ATOMIC_SWAP |
65 (0x41) | -- | FLAT_ATOMIC_CMPSWAP |
66 (0x42) | -- | FLAT_ATOMIC_ADD |
67 (0x43) | -- | FLAT_ATOMIC_SUB |
68 (0x44) | -- | FLAT_ATOMIC_SMIN |
69 (0x45) | -- | FLAT_ATOMIC_UMIN |
70 (0x46) | -- | FLAT_ATOMIC_SMAX |
71 (0x47) | -- | FLAT_ATOMIC_UMAX |
72 (0x48) | -- | FLAT_ATOMIC_AND |
73 (0x49) | -- | FLAT_ATOMIC_OR |
74 (0x4a) | -- | FLAT_ATOMIC_XOR |
75 (0x4b) | -- | FLAT_ATOMIC_INC |
76 (0x4c) | -- | FLAT_ATOMIC_DEC |
80 (0x50) | FLAT_ATOMIC_SWAP_X2 | -- |
81 (0x51) | FLAT_ATOMIC_CMPSWAP_X2 | -- |
82 (0x52) | FLAT_ATOMIC_ADD_X2 | -- |
84 (0x54) | FLAT_ATOMIC_SUB_X2 | -- |
85 (0x55) | FLAT_ATOMIC_SMIN_X2 | -- |
86 (0x56) | FLAT_ATOMIC_UMIN_X2 | -- |
87 (0x57) | FLAT_ATOMIC_SMAX_X2 | -- |
88 (0x58) | FLAT_ATOMIC_UMAX_X2 | -- |
89 (0x59) | FLAT_ATOMIC_AND_X2 | -- |
90 (0x5a) | FLAT_ATOMIC_OR_X2 | -- |
91 (0x5b) | FLAT_ATOMIC_XOR_X2 | -- |
92 (0x5c) | FLAT_ATOMIC_INC_X2 | -- |
93 (0x5d) | FLAT_ATOMIC_DEC_X2 | -- |
94 (0x5e) | FLAT_ATOMIC_FCMPSWAP_X2 | -- |
95 (0x5f) | FLAT_ATOMIC_FMIN_X2 | -- |
96 (0x60) | FLAT_ATOMIC_FMAX_X2 | FLAT_ATOMIC_SWAP_X2 |
97 (0x61) | -- | FLAT_ATOMIC_CMPSWAP_X2 |
98 (0x62) | -- | FLAT_ATOMIC_ADD_X2 |
99 (0x63) | -- | FLAT_ATOMIC_SUB_X2 |
100 (0x64) | -- | FLAT_ATOMIC_SMIN_X2 |
101 (0x65) | -- | FLAT_ATOMIC_UMIN_X2 |
102 (0x66) | -- | FLAT_ATOMIC_SMAX_X2 |
103 (0x67) | -- | FLAT_ATOMIC_UMAX_X2 |
104 (0x68) | -- | FLAT_ATOMIC_AND_X2 |
105 (0x69) | -- | FLAT_ATOMIC_OR_X2 |
106 (0x6a) | -- | FLAT_ATOMIC_XOR_X2 |
107 (0x6b) | -- | FLAT_ATOMIC_INC_X2 |
108 (0x6c) | -- | FLAT_ATOMIC_DEC_X2 |
Instruction set
Alphabetically sorted instruction list:
FLAT_ATOMIC_ADD
Opcode: 50 (0x32) for GCN 1.1; 66 (0x42) for GCN 1.2
Syntax: FLAT_ATOMIC_ADD VDST, VADDR(2), VDATA
Description: Add VDATA to value of VADDR address, and store result to this address.
If GLC flag is set then return previous value from this address to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = *VM + VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_ADD_X2
Opcode: 82 (0x52) for GCN 1.1; 98 (0x62) for GCN 1.2
Syntax: FLAT_ATOMIC_ADD_X2 VDST(2), VADDR(2), VDATA(2)
Description: Add 64-bit VDATA to 64-bit value of VADDR address, and store result
to this address. If GLC flag is set then return previous value from resource to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = *VM + VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_AND
Opcode: 57 (0x39) for GCN 1.1; 72 (0x48) for GCN 1.2
Syntax: FLAT_ATOMIC_AND VDST, VADDR(2), VDATA
Description: Do bitwise AND on VDATA and value of VADDR address,
and store result to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = *VM & VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_AND_X2
Opcode: 89 (0x59) for GCN 1.1; 104 (0x68) for GCN 1.2
Syntax: FLAT_ATOMIC_AND_X2 VDST(2), VADDR(2), VDATA(2)
Description: Do 64-bit bitwise AND on VDATA and value of VADDR address,
and store result to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = *VM & VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_CMPSWAP
Opcode: 49 (0x31) for GCN 1.1; 65 (0x41) for GCN 1.2
Syntax: FLAT_ATOMIC_CMPSWAP VDST, VADDR(2), VDATA(2)
Description: Store lower VDATA dword into VADDR address if previous value
from that address is equal VDATA>>32, otherwise keep old value from address.
If GLC flag is set then return previous value from resource to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = *VM==(VDATA>>32) ? VDATA&0xffffffff : *VM // part of atomic
VDST = (GLC) ? P : VDST // last part of atomic
FLAT_ATOMIC_CMPSWAP_X2
Opcode: 81 (0x51) for GCN 1.1; 97 (0x61) for GCN 1.2
Syntax: FLAT_ATOMIC_CMPSWAP_X2 VDST(2), VADDR(2), VDATA(4)
Description: Store lower VDATA 64-bit word into VADDR address if previous value
from resource is equal VDATA>>64, otherwise keep old value from VADDR.
If GLC flag is set then return previous value from VADDR to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = *VM==(VDATA[2:3]) ? VDATA[0:1] : *VM // part of atomic
VDST = (GLC) ? P : VDST // last part of atomic
FLAT_ATOMIC_DEC
Opcode: 61 (0x3d) for GCN 1.1; 76 (0x4c) for GCN 1.2
Syntax: FLAT_ATOMIC_DEC VDST, VADDR(2), VDATA
Description: Compare value from VADDR address and if less or equal than VDATA
and this value is not zero, then decrement value from VADDR address,
otherwise store VDATA to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = (*VM <= VDATA && *VM!=0) ? *VM-1 : VDATA // atomic
VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_DEC_X2
Opcode: 93 (0x5d) for GCN 1.1; 108 (0x6c) for GCN 1.2
Syntax: FLAT_ATOMIC_DEC_X2 VDST(2), VADDR(2), VDATA(2)
Description: Compare 64-bit value from VADDR address and if less or equal than VDATA
and this value is not zero, then decrement value from VADDR address,
otherwise store VDATA to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = (*VM <= VDATA && *VM!=0) ? *VM-1 : VDATA // atomic
VDST = (GLC) ? P : VDST // atomic
BUFFER_ATOMIC_FCMPSWAP
Opcode: 62 (0x3e) for GCN 1.1
Syntax: FLAT_ATOMIC_FCMPSWAP VDST, VADDR(1:2), VDATA(2)
Description: Store lower VDATA dword into VADDR address if previous single floating point
value from address is equal singe floating point value VDATA>>32,
otherwise keep old value from VADDR address.
If GLC flag is set then return previous value from this address to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
FLOAT* VM = (FLOAT*)VADDR
FLOAT P = *VM; *VM = *VM==ASFLOAT(VDATA>>32) ? VDATA&0xffffffff : *VM // part of atomic
VDST[0] = (GLC) ? P : VDST // last part of atomic
FLAT_ATOMIC_FCMPSWAP_X2
Opcode: 94 (0x5e) for GCN 1.1
Syntax: FLAT_ATOMIC_FCMPSWAP_X2 VDATA(2), VADDR(2), SRSRC(4), SOFFSET
Description: Store lower VDATA 64-bit word into VADDR address if previous double
floating point value from address is equal singe floating point value VDATA>>32,
otherwise keep old value from VADDR address.
If GLC flag is set then return previous value from address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
DOUBLE* VM = (DOUBLE*)VMADDR
DOUBLE P = *VM; *VM = *VM==ASDOUBLE(VDATA[2:3]) ? VDATA[0:1] : *VM // part of atomic
VDST = (GLC) ? P : VDST // last part of atomic
FLAT_ATOMIC_FMAX
Opcode: 64 (0x40) for GCN 1.1
Syntax: FLAT_ATOMIC_FMAX VDST, VADDR(2), VDATA
Description: Choose greatest single floating point value from VDATA and from
VADDR address, and store result to this address.
If GLC flag is set then return previous value from address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
FLOAT* VM = (FLOAT*)VADDR
UINT32 P = *VM; *VM = MAX(*VM, ASFLOAT(VDATA)); VDST = (GLC) ? P : VDST // atomic
BUFFER_ATOMIC_FMAX_X2
Opcode: 96 (0x60) for GCN 1.1
Syntax: FLAT_ATOMIC_FMAX_X2 VDST(2), VADDR(2), VDATA(2)
Description: Choose greatest double floating point value from VDATA and from
VADDR address, and store result to this address.
If GLC flag is set then return previous value from address to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
DOUBLE* VM = (DOUBLE*)VADDR
UINT64 P = *VM; *VM = MAX(*VM, ASDOUBLE(VDATA)); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_FMIN
Opcode: 63 (0x3f) for GCN 1.1
Syntax: FLAT_ATOMIC_FMIN VDST, VADDR(2), VDATA
Description: Choose smallest single floating point value from VDATA and from
VADDR address, and store result to this address.
If GLC flag is set then return previous value from address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
FLOAT* VM = (FLOAT*)VADDR
UINT32 P = *VM; *VM = MIN(*VM, ASFLOAT(VDATA)); VDST = (GLC) ? P : VDST // atomic
BUFFER_ATOMIC_FMIN_X2
Opcode: 95 (0x5f) for GCN 1.1
Syntax: FLAT_ATOMIC_FMIN_X2 VDST(2), VADDR(2), VDATA(2)
Description: Choose smallest double floating point value from VDATA and from
VADDR address, and store result to this address.
If GLC flag is set then return previous value from address to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
DOUBLE* VM = (DOUBLE*)VADDR
UINT64 P = *VM; *VM = MIN(*VM, ASDOUBLE(VDATA)); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_INC
Opcode: 60 (0x3c) for GCN 1.1; 75 (0x4b) for GCN 1.2
Syntax: FLT_ATOMIC_INC VDST, VADDR(2), VDATA
Description: Compare value from VADDR address and if less than VDATA,
then increment value from address, otherwise store zero to address.
If GLC flag is set then return previous value from this address to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = (*VM < VDATA) ? *VM+1 : 0; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_INC_X2
Opcode: 92 (0x5c) for GCN 1.1; 107 (0x9b) for GCN 1.2
Syntax: FLAT_ATOMIC_INC_X2 VDST(2), VADDR(2), VADDR(2)
Description: Compare 64-bit value from VADDR address and if less than VDATA,
then increment value from address, otherwise store zero to address.
If GLC flag is set then return previous value from this address to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = (*VM < VDATA) ? *VM+1 : 0; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_OR
Opcode: 58 (0x3a) for GCN 1.1; 73 (0x49) for GCN 1.2
Syntax: FLAT_ATOMIC_OR VDST, VADDR(2), VDATA
Description: Do bitwise OR on VDATA and value of VADDR address,
and store result to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = *VM | VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_OR_X2
Opcode: 90 (0x5a) for GCN 1.1; 105 (0x69) for GCN 1.2
Syntax: FLAT_ATOMIC_OR_X2 VDST(2), VADDR(2), VDATA(2)
Description: Do 64-bit bitwise OR on VDATA and value of VADDR address,
and store result to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = *VM | VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SMAX
Opcode: 55 (0x37) for GCN 1.1; 70 (0x46) for GCN 1.2
Syntax: FLAT_ATOMIC_SMAX VDST, VADDR(2), VDATA
Description: Choose greatest signed 32-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
INT32* VM = (INT32*)VADDR
UINT32 P = *VM; *VM = MAX(*VM, (INT32)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SMAX_X2
Opcode: 87 (0x57) for GCN 1.1; 102 (0x66) for GCN 1.2
Syntax: FLAT_ATOMIC_SMAX_X2 VDST(2), VADDR(2), VDATA(2)
Description: Choose greatest signed 64-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
INT64* VM = (INT64*)VADDR
UINT64 P = *VM; *VM = MAX(*VM, (INT64)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SMIN
Opcode: 53 (0x35) for GCN 1.1; 68 (0x44) for GCN 1.2
Syntax: FLAT_ATOMIC_SMIN VDST, VADDR(2), VDATA
Description: Choose smallest signed 32-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
INT32* VM = (INT32*)VADDR
UINT32 P = *VM; *VM = MIN(*VM, (INT32)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SMIN_X2
Opcode: 85 (0x55) for GCN 1.1; 100 (0x64) for GCN 1.2
Syntax: FLAT_ATOMIC_SMIN_X2 VDST(2), VADDR(2), VDATA(2)
Description: Choose smallest signed 64-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
INT64* VM = (INT64*)VADDR
UINT64 P = *VM; *VM = MIN(*VM, (INT64)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SUB
Opcode: 51 (0x33) for GCN 1.1; 67 (0x43) for GCN 1.2
Syntax: FLAT_ATOMIC_SUB VDST, VADDR(2), VDATA
Description: Subtract VDATA from value of VADDR address, and store result to this address.
If GLC flag is set then return previous value from this address to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = *VM - VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SUB_X2
Opcode: 83 (0x53) for GCN 1.1; 99 (0x63) for GCN 1.2
Syntax: FLAT_ATOMIC_SUB_X2 VDST(2), VADDR(2), VDATA(2)
Description: Subtract 64-bit VDATA from 64-bit value of VADDR address, and store result
to this address. If GLC flag is set then return previous value from resource to VDST,
otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = *VM - VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SWAP
Opcode: 48 (0x30) for GCN 1.1; 64 (0x40) for GCN 1.2
Syntax: FLAT_ATOMIC_SWAP VDST, VADDR(2), VDATA
Description: Store VDATA dword into VADDR address. If GLC flag is set then
return previous value from VADDR address to VDST, otherwise keep old value from VDST.
Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_SWAP_X2
Opcode: 80 (0x50) for GCN 1.1; 96 (0x60) for GCN 1.2
Syntax: FLAT_ATOMIC_SWAP_X2 VDST(2), VADDR(2), VDATA(2)
Description: Store VDATA 64-bit word into VADDR address. If GLC flag is set then
return previous value from VADDR address to VDST, otherwise keep old value from VDST.
Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_UMAX
Opcode: 56 (0x38) for GCN 1.1; 71 (0x47) for GCN 1.2
Syntax: FLAT_ATOMIC_UMAX VDST, VADDR(2), VDATA
Description: Choose greatest unsigned 32-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = MAX(*VM, (UINT32)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_UMAX_X2
Opcode: 88 (0x58) for GCN 1.1; 103 (0x67) for GCN 1.2
Syntax: FLAT_ATOMIC_UMAX_X2 VDST(2), VADDR(2), VDATA(2)
Description: Choose greatest unsigned 64-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = MAX(*VM, (UINT64)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_UMIN
Opcode: 54 (0x36) for GCN 1.1; 69 (0x45) for GCN 1.2
Syntax: FLAT_ATOMIC_UMIN VDST, VADDR(2), VDATA
Description: Choose smallest unsigned 32-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = MIN(*VM, (UINT32)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_UMIN_X2
Opcode: 86 (0x56) for GCN 1.1; 101 (0x65) for GCN 1.2
Syntax: FLAT_ATOMIC_UMIN_X2 VDST(2), VADDR(2), VDATA(2)
Description: Choose smallest unsigned 64-bit value from VDATA and from VADDR address,
and store result to this address.
If GLC flag is set then return previous value from this address to VDST, otherwise keep
VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = MIN(*VM, (UINT64)VDATA); VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_XOR
Opcode: 59 (0x3b) for GCN 1.1; 73 (0x4a) for GCN 1.2
Syntax: FLAT_ATOMIC_XOR VDST, VADDR(2), VDATA
Description: Do bitwise XOR on VDATA and value of VADDR address,
and store result to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT32* VM = (UINT32*)VADDR
UINT32 P = *VM; *VM = *VM ^ VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_ATOMIC_XOR_X2
Opcode: 91 (0x5b) for GCN 1.1; 106 (0x6a) for GCN 1.2
Syntax: FLAT_ATOMIC_XOR_X2 VDST(2), VADDR(2), VDATA(2)
Description: Do 64-bit bitwise XOR on VDATA and value of VADDR address,
and store result to this address. If GLC flag is set then return previous value
from this address to VDST, otherwise keep VDST value. Operation is atomic.
Operation:
UINT64* VM = (UINT64*)VADDR
UINT64 P = *VM; *VM = *VM ^ VDATA; VDST = (GLC) ? P : VDST // atomic
FLAT_LOAD_DWORD
Opcode: 12 (0xc) for GCN 1.1; 20 (0x14) for GCN 1.2
Syntax: FLAT_LOAD_DWORD VDST, VADDR(2)
Description Load dword to VDST from VADDR address.
Operation:
VDST = *(UINT32*)VADDR
FLAT_LOAD_DWORDX2
Opcode: 13 (0xd) for GCN 1.1; 21 (0x15) for GCN 1.2
Syntax: FLAT_LOAD_DWORDX2 VDST(, VADDR(2)
Description Load two dwords to VDST from VADDR address.
Operation:
VDST = *(UINT64*)VADDR
FLAT_LOAD_DWORDX3
Opcode: 15 (0xf) for GCN 1.1; 22 (0x16) for GCN 1.2
Syntax: FLAT_LOAD_DWORDX3 VDST(3), VADDR(2)
Description Load three dwords to VDST from VADDR address.
Operation:
VDST[0] = *(UINT32*)VADDR
VDST[1] = *(UINT32*)(VADDR+4)
VDST[2] = *(UINT32*)(VADDR+8)
FLAT_LOAD_DWORDX4
Opcode: 13 (0xe) for GCN 1.1; 23 (0x17) for GCN 1.2
Syntax: FLAT_LOAD_DWORDX4 VDST(4), VADDR(2)
Description Load four dwords to VDST from VADDR address.
Operation:
VDST[0] = *(UINT32*)VADDR
VDST[1] = *(UINT32*)(VADDR+4)
VDST[2] = *(UINT32*)(VADDR+8)
VDST[3] = *(UINT32*)(VADDR+12)
FLAT_LOAD_SBYTE
Opcode: 9 (0x9) for GCN 1.1; 17 (0x11) for GCN 1.2
Syntax: FLAT_LOAD_SBYTE VDST, VADDR(2)
Description: Load byte to VDST from VADDR address with sign extending.
Operation:
VDST = *(INT8*)VADDR
FLAT_LOAD_SSHORT
Opcode: 11 (0xb) for GCN 1.1; 19 (0x13) for GCN 1.2
Syntax: FLAT_LOAD_SSHORT VDST, VADDR(2)
Description: Load 16-bit word to VDST from VADDR address with sign extending.
Operation:
VDST = *(INT16*)VADDR
FLAT_LOAD_UBYTE
Opcode: 8 (0x8) for GCN 1.1; 16 (0x10) for GCN 1.2
Syntax: FLAT_LOAD_UBYTE VDST, VADDR(2)
Description: Load byte to VDST from VADDR address with zero extending.
Operation:
VDST = *(UINT8*)VADDR
FLAT_LOAD_USHORT
Opcode: 10 (0xa) for GCN 1.1; 18 (0x12) for GCN 1.2
Syntax: FLAT_LOAD_USHORT VDST, VADDR(1:2)
Description: Load 16-bit word to VDST from VADDR address with zero extending.
Operation:
VDST = *(UINT16*)VADDR
FLAT_STORE_BYTE
Opcode: 24 (0x18)
Syntax: FLAT_STORE_BYTE VADDR(2), VDATA
Description: Store byte from VDATA to VADDR address.
Operation:
*(UINT8*)VADDR = VDATA&0xff
FLAT_STORE_DWORD
Opcode: 28 (0x1c)
Syntax: FLAT_STORE_DWORD VADDR(2), VDATA
Description: Store dword from VDATA to VADDR address.
Operation:
*(UINT32*)VADDR = VDATA
FLAT_STORE_DWORDX2
Opcode: 29 (0x1d)
Syntax: FLAT_STORE_DWORDX2 VADDR(2), VDATA(2)
Description: Store two dwords from VDATA to VADDR address.
Operation:
*(UINT64*)VADDR = VDATA
FLAT_STORE_DWORDX3
Opcode: 31 (0x1f) for GCN 1.1; 30 (0x1e) for GCN 1.2
Syntax: FLAT_STORE_DWORDX3 VADDR(2), VDATA(3)
Description: Store three dwords from VDATA to VADDR address.
Operation:
*(UINT32*)(VADDR) = VDATA[0]
*(UINT32*)(VADDR+4) = VDATA[1]
*(UINT32*)(VADDR+8) = VDATA[2]
FLAT_STORE_DWORDX4
Opcode: 30 (0x1e) for GCN 1.1; 31 (0x1d) for GCN 1.2
Syntax: FLAT_STORE_DWORDX4 VADDR(2), VDATA(4)
Description: Store four dwords from VDATA to VADDR address.
Operation:
*(UINT32*)(VADDR) = VDATA[0]
*(UINT32*)(VADDR+4) = VDATA[1]
*(UINT32*)(VADDR+8) = VDATA[2]
*(UINT32*)(VADDR+12) = VDATA[3]
FLAT_STORE_SHORT
Opcode: 26 (0x1a)
Syntax: FLAT_STORE_SHORT VADDR(2), VDATA
Description: Store 16-bit word from VDATA to VADDR address.
Operation:
*(UINT16*)VADDR = VDATA&0xffff