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ATI R700 Technology
Memory Read Instructions 10-39
Copyright © 2009 Advanced Micro Devices, Inc. All rights reserved.
Memory-Read Clause Instruction Doubleword 0
Instructions
MEM_RD_WORD0
Description Memory read instruction doubleword 0.
Opcode Field Name Bits Format
VTX_INST [4:0] enum(5)
Vertex fetch instruction.
The only legal value is 2: VTX_INST_MEM: memory read/write.
All other values are illegal.
ELEM_SIZE [6:5] int(2)
Number of dwords per element, minus one. This field is interpreted as a
value: 1,2, or 4 (3 is illegal). The value from INDEX_GPR is multiplied by this
factor, if applicable. Normally, ELEM_SIZE = 4 dwords for scratch and
reduction, 1 dword for other types.
FETCH_WHOLE_QUAD 7int(1)
0 Texture instruction can ignore invalid pixels.
1 Texture instruction must fetch data for all pixels. The result can be used
as a source coordinate of a dependent read.
MEM_OP [10:8] enum(3)
Sub-opcode for memory reads.
0 MEM_OP_RD_SCRATCH: Scratch (temp) buffer read.
1 MEM_OP_RD_REDUC: Reduction buffer read.
2 MEM_OP_RD_SCATTER: Scatter (mem-export) buffer read.
4 MEM_OP_LOCAL_DS_WRITE: Data sharing within one SIMD.
5 MEM_OP_LOCAL_DS_READ: Data sharing within one SIMD.
6 Reserved.
7 Reserved.
UNCACHED 11 int(1)
Uncached (cache-bypass) read. When writing and reading in one kernel
pass, this bit must be set.
INDEXED 12 int(1)
Indexed access (set) or not (cleared). Indexed includes source-GPR in
address calculation.
MEM_REQ_SIZE [14:13] int(2)
Must be cleared for R700-family and later products.
Reserved 15
Reserved.
SRC_GPR [22:16] int(7)
Source GPR address from which to get fetch address.
SRC_REL 23 enum(1) none
Indicate whether source address is absolute or relative to an index.
0 Absolute: no relative addressing.
1 Relative: add current loop index value to this address.
SRC_SEL_X 25:24 enum(2) none
- Reference Guide 1
- Contents 3
- ATI R700 Technology 10
- About This Document 11
- Audience 11
- Organization 11
- Registers 12
- Endian Order 12
- Conventions 12
- Related Documents 13
- Contact Information 13
- Chapter 1 15
- Introduction 15
- Chapter 2 19
- 2.1.1 Data Flows 20
- 2.1.2 Geometry Program Absent 20
- 2.1.3 Geometry Shader Present 21
- 2.2 Instruction Terminology 22
- 2.3 Control Flow and Clauses 24
- 2.5 Program State 26
- Table 2.6 ALU State 28
- Table 2.7 Vertex-Fetch State 29
- Table 2.6 ALU State (Cont.) 29
- 2.6 Data Sharing 30
- Data Sharing 2-13 31
- 2-14 Data Sharing 32
- 2.6.2 Local Data Share (LDS) 33
- 2-16 Data Sharing 34
- Data Sharing 2-17 35
- 2-18 Data Sharing 36
- Chapter 3 37
- Control Flow (CF) Programs 37
- 3.1 CF Microcode Encoding 38
- 3.3.1 ALU Clause Initiation 42
- 3.4.2 Memory Writes 44
- 3.4.3 Memory Reads 45
- 3.6 Conditional Execution 47
- 3-12 Conditional Execution 48
- Conditional Execution 3-13 49
- 3.6.5 Stack Allocation 51
- 3.7.1 ADDR Field 53
- 3.7.3 DirectX9 Loops 54
- 3.7.4 DirectX10 Loops 55
- 3.7.5 Repeat Loops 55
- 3.7.6 Subroutines 56
- Chapter 4 59
- ALU Clauses 59
- 4-2 Overview of ALU Features 60
- 4.6 GPRs and Constants 63
- 4.6.1 Relative Addressing 64
- 4.6.3 Out-of-Bounds Addresses 65
- 4.6.4 ALU Constants 66
- 4.7 Scalar Operands 67
- 4.7.2 Input Modifiers 68
- 4.7.3 Data Flow 68
- Scalar Operands 4-11 69
- 4-12 Scalar Operands 70
- BANK_SWIZZLE src0 src1 src2 70
- 4-16 Scalar Operands 74
- 4.8 ALU Instructions 77
- Floating-Point Operations 79
- 4.9 ALU Outputs 83
- 4.9.2 Destination Registers 84
- 4.9.3 Predicate Output 84
- 4.9.4 NOP Instruction 85
- 4.9.5 MOVA Instructions 85
- Chapter 5 89
- Vertex-Fetch Clauses 89
- 5.2 Constant Sharing 90
- Chapter 6 91
- Texture-Fetch Clauses 91
- 6.2 Constant-Fetch Operations 92
- 6.4 Constant Sharing 92
- Constant Sharing 6-3 93
- 6-4 Constant Sharing 94
- Chapter 7 95
- Memory Read Clauses 95
- 7.2 Cached and Uncached Reads 96
- 7.3 Burst Memory Reads 96
- Chapter 8 97
- Data Share Clauses 97
- Chapter 9 99
- Instruction Set 99
- Initiate ALU Clause 100
- ALU_BREAK 101
- ALU_CONTINUE 102
- ALU_ELSE_AFTER 103
- ALU_POP_AFTER 104
- ALU_POP2_AFTER 105
- ALU_PUSH_BEFORE 106
- Call Subroutine 107
- Call Fetch Subroutine 108
- CUT_VERTEX 109
- EMIT_CUT_VERTEX 111
- Vertex Exported to Memory 112
- EMIT_VERTEX 112
- Export from VS or PS 113
- Export Last Data 114
- EXPORT_DONE 114
- Jump to Address 115
- Kill Pixels Conditional 116
- Break Out Of Innermost Loop 117
- LOOP_BREAK 117
- Continue Loop 118
- LOOP_CONTINUE 118
- End Loop 119
- LOOP_END 119
- Start Loop 120
- LOOP_START 120
- Start Loop (DirectX 10) 121
- LOOP_START_DX10 121
- Enter Loop If Zero, No Push 122
- LOOP_START_NO_AL 122
- Access Scatter Buffer 123
- MEM_EXPORT 123
- Access Reduction Buffer 124
- MEM_REDUCTION 124
- Write Ring Buffer 125
- MEM_RING 125
- Access Scratch Buffer 126
- MEM_SCRATCH 126
- Write Steam Buffer 0 127
- MEM_STREAM0 127
- Write Steam Buffer 1 128
- MEM_STREAM1 128
- Write Steam Buffer 2 129
- MEM_STREAM2 129
- Write Steam Buffer 3 130
- MEM_STREAM3 130
- No Operation 131
- Pop From Stack 132
- Push State To Stack 133
- PUSH_ELSE 134
- Return From Subroutine 135
- Initiate Texture-Fetch Clause 136
- Initiate Vertex-Fetch Clause 137
- WAIT_ACK 139
- 9.2 ALU Instructions 140
- Add Floating-Point, 64-Bit 141
- Add Integer 144
- AND Bitwise 145
- Scalar Arithmetic Shift Right 146
- ASHR_INT 146
- Floating-Point Ceiling 147
- CMOVE_INT 149
- CMOVGE_INT 151
- CMOVGT_INT 153
- Scalar Cosine 154
- Cube Map 155
- Four-Element Dot Product 156
- DOT4_IEEE 157
- Scalar Base-2 Exponent, IEEE 158
- EXP_IEEE 158
- Floating-Point Floor 159
- Floating-Point To Integer 160
- FLT_TO_INT 160
- FLT32_TO_FLT64 161
- FLT64_TO_FLT32 163
- Floating-Point Fractional 165
- FRACT_64 166
- FREXP_64 168
- Integer To Floating-Point 170
- INT_TO_FLT 170
- LDEXP_64 175
- Scalar Base-2 Log 177
- LOG_CLAMPED 177
- Scalar Base-2 IEEE Log 178
- LOG_IEEE 178
- Scalar Logical Shift Left 179
- LSHL_INT 179
- Scalar Logical Shift Right 180
- LSHR_INT 180
- Floating-Point Maximum 181
- MAX_DX10 182
- Integer Maximum 183
- Unsigned Integer Maximum 184
- MAX_UINT 184
- Four-Element Maximum 185
- Floating-Point Minimum 186
- MIN_DX10 187
- Signed Integer Minimum 188
- Unsigned Integer Minimum 189
- MIN_UINT 189
- Copy To GPR 190
- MOVA_FLOOR 192
- MOVA_INT 193
- Floating-Point Multiply 194
- Floating-Point Multiply, IEEE 197
- MUL_IEEE 197
- MUL_LIT_D2 199
- MUL_LIT_M2 200
- MUL_LIT_M4 201
- Floating-Point Multiply-Add 202
- MULADD_64 203
- MULADD_D2 206
- MULADD_M2 207
- MULADD_M4 208
- MULADD_IEEE 209
- MULADD_IEEE_D2 210
- MULADD_IEEE_M2 211
- MULADD_IEEE_M4 212
- MULHI_INT 213
- MULHI_UINT 214
- MULLO_INT 215
- MULLO_UINT 216
- Bit-Wise NOT 218
- Bit-Wise OR 219
- Predicate Counter Clear 220
- PRED_SET_CLR 220
- Predicate Counter Invert 221
- PRED_SET_INV 221
- Predicate Counter Pop 222
- PRED_SET_POP 222
- Predicate Counter Restore 223
- PRED_SET_RESTORE 223
- PRED_SETE 224
- PRED_SETE_64 225
- PRED_SETE_INT 227
- PRED_SETE_PUSH 228
- PRED_SETE_PUSH_INT 229
- PRED_SETGE 230
- PRED_SETGE_64 231
- PRED_SETGE_INT 234
- PRED_SETGE_PUSH 235
- PRED_SETGE_PUSH_INT 236
- PRED_SETGT 237
- PRED_SETGT_64 238
- PRED_SETGT_INT 240
- PRED_SETGT_PUSH 241
- PRED_SETGT_PUSH_INT 242
- PRED_SETLE_INT 243
- PRED_SETLE_PUSH_INT 244
- PRED_SETLT_INT 245
- PRED_SETLT_PUSH_INT 246
- PRED_SETNE 247
- PRED_SETNE_INT 248
- PRED_SETNE_PUSH 249
- PRED_SETNE_PUSH_INT 250
- RECIP_CLAMPED 251
- RECIP_FF 252
- RECIP_IEEE 253
- RECIP_INT 254
- RECIP_UINT 255
- RECIPSQRT_CLAMPED 256
- RECIPSQRT_FF 257
- RECIPSQRT_IEEE 258
- Floating-Point Set If Equal 260
- SETE_DX10 261
- Integer Set If Equal 262
- SETE_INT 262
- SETGE_DX10 264
- SETGE_INT 265
- SETGE_UINT 266
- SETGT_DX10 268
- SETGT_INT 269
- SETGT_UINT 270
- SETNE_DX10 272
- Integer Set If Not Equal 273
- SETNE_INT 273
- Scalar Sine 274
- SQRT_IEEE 275
- Integer Subtract 276
- Floating-Point Truncate 277
- UINT_TO_FLT 278
- Bit-Wise XOR 279
- 9.3 Vertex-Fetch Instructions 280
- Semantic Vertex Fetch 281
- SEMANTIC 281
- GET_COMP_TEX_LOD 282
- GET_GRADIENTS_H 283
- GET_GRADIENTS_V 284
- Get Number of Samples 285
- GET_NUMBER_OF_SAMPLES 285
- Get Texture Resolution 286
- GET_TEXTURE_RESINFO 286
- Keep Gradients 287
- KEEP_GRADIENTS 287
- Load Texture Elements 288
- Memory Read 289
- Sample Texture 290
- SAMPLE_C 291
- SAMPLE_C_G 292
- SAMPLE_C_G_L 293
- SAMPLE_C_G_LB 294
- SAMPLE_C_G_LZ 295
- Sample Texture with LOD 296
- SAMPLE_C_L 296
- Sample Texture with LOD Bias 297
- SAMPLE_C_LB 297
- Sample Texture with LOD Zero 298
- SAMPLE_C_LZ 298
- Sample Texture with Gradient 299
- SAMPLE_G 299
- SAMPLE_G_L 300
- SAMPLE_G_LB 301
- SAMPLE_G_LZ 302
- SAMPLE_L 303
- SAMPLE_LB 304
- SAMPLE_LZ 305
- Set Cubemap Index 306
- SET_CUBEMAP_INDEX 306
- Set Horizontal Gradients 307
- SET_GRADIENTS_H 307
- Set Vertical Gradients 308
- SET_GRADIENTS_V 308
- 9.5 Memory Read Instructions 309
- Read Reduction Buffer 310
- REDUCTION 310
- Read Scatter Buffer 311
- Local Data Share Write 312
- LOCAL_DS_WRITE 312
- Local Data Share Read 313
- LOCAL_DS_READ 313
- LOCAL_DS_READ, opcode 5 (0x5) 313
- Chapter 10 315
- Microcode Formats 315
- Control Flow Doubleword 0 317
- CF_WORD0 317
- Control Flow Doubleword 1 318
- CF_WORD1 318
- Control Flow ALU Doubleword 0 321
- CF_ALU_WORD0 321
- Control Flow ALU Doubleword 1 322
- CF_ALU_WORD1 322
- CF_ALLOC_EXPORT_WORD0 324
- CF_ALLOC_EXPORT_WORD1 326
- CF_ALLOC_EXPORT_WORD1_BUF 328
- 10.2 ALU Instructions 329
- ALU Doubleword 0 330
- ALU_WORD0 330
- ALU Doubleword 0 (Cont.) 331
- ALU_WORD1_OP2_V2 332
- ALU_WORD1_OP3 337
- Vertex Fetch Doubleword 0 340
- Vertex Fetch Doubleword 1 341
- VTX_WORD1 341
- VTX_WORD1_GPR 344
- VTX_WORD1_SEM 346
- Texture Fetch Doubleword 0 349
- TEX_WORD0 349
- Texture Fetch Doubleword 1 351
- TEX_WORD1 351
- 10.5 Memory Read Instructions 352
- MEM_RD_WORD0 353
- MEM_RD_WORD1 355
- MEM_RD_WORD2 357
- MEM_DSW_WORD0 358
- MEM_DSW_WORD1 359
- MEM_DSW_WORD2 360
- MEM_DSR_WORD0 361
- MEM_DSR_WORD1 362
- MEM_DSR_WORD2 363
- Appendix A 365
- Instruction Table 365
- Glossary of Terms 373
- ATI STREAM COMPUTING 374
- Glossary-10 382
- Index-10 392
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