From b3ce70a797756285ea9b15b3e5cf515d8b6a2b63 Mon Sep 17 00:00:00 2001
From: Tor Aamodt <aamodt@ece.ubc.ca>
Date: Sun, 10 Oct 2010 21:19:52 -0800
Subject: 1. create function unit classes for SP, SFU, LD/ST. 2. refactor
 memory stage into a ld/st function unit 3. refactor memory access generation
 (moved into warp_inst_t class)

the above should make supporting fermi uarch much easier

passing CUDA 3.1 regression

still need to...
(a) update scoreboard to keep count of outstanding memory requests
    and use operand collector for writebacks into register file
(b) add back shared memory pipeline delay
(c) remove use of MSHR's for non-cached global/local accesses
(d) replace texture cache with a split tag/data array pipe
(e) re-implement memory_partition stuff so it makes more sense

[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7844]
---
 src/cuda-sim/cuda-sim.cc | 102 ++++++++++++++++++++++++-----------------------
 1 file changed, 52 insertions(+), 50 deletions(-)

(limited to 'src/cuda-sim/cuda-sim.cc')

diff --git a/src/cuda-sim/cuda-sim.cc b/src/cuda-sim/cuda-sim.cc
index 89e89e8..e61659c 100644
--- a/src/cuda-sim/cuda-sim.cc
+++ b/src/cuda-sim/cuda-sim.cc
@@ -438,61 +438,64 @@ void ptx_print_insn( address_type pc, FILE *fp )
    finfo->print_insn(pc,fp);
 }
 
-static void get_opcode_info( const ptx_instruction *pI, unsigned opcode, unsigned *cycles, op_type *op )
+void ptx_instruction::get_opcode_info()
 {
-   *op = ALU_OP;
-   *cycles = 1;
-   if ( opcode == LD_OP ) {
-      *op = LOAD_OP;
-   } else if ( opcode == ST_OP ) {
-      *op = STORE_OP;
-   } else if ( opcode == BRA_OP ) {
-      *op = BRANCH_OP;
-   } else if ( opcode == BREAKADDR_OP ) {
-      *op = BRANCH_OP;
-   } else if ( opcode == TEX_OP ) {
-      *op = LOAD_OP;
-   } else if ( opcode == ATOM_OP ) {
-      *op = LOAD_OP; // timing model treats this like load for now
-   } else if ( opcode == BAR_OP ) {
-      *op = BARRIER_OP;
-   } else if ( opcode == MEMBAR_OP ) 
-      *op = MEMORY_BARRIER_OP;
-
-   // Floating point instructions
-   if( opcode == RCP_OP ) {
-       *cycles = 2;
-       *op = SFU_OP;
-   } else if ( opcode == LG2_OP || opcode == RSQRT_OP ) {
-       *cycles = 4;
-       *op = SFU_OP;
-   } else if( opcode == SQRT_OP || opcode == SIN_OP || opcode == COS_OP || opcode == EX2_OP ) {
-      *cycles = 4;
-      *op = SFU_OP;
-   } else if( opcode == DIV_OP ) {
+   op = ALU_OP;
+   initiation_interval = latency = 1;
+   switch( m_opcode ) {
+   case LD_OP: op = LOAD_OP; break;
+   case ST_OP: op = STORE_OP; break;
+   case BRA_OP: op = BRANCH_OP; break;
+   case BREAKADDR_OP: op = BRANCH_OP; break;
+   case TEX_OP: op = LOAD_OP; break;
+   case ATOM_OP: op = LOAD_OP; break;
+   case BAR_OP: op = BARRIER_OP; break;
+   case MEMBAR_OP: op = MEMORY_BARRIER_OP; break;
+   case RCP_OP:
+       latency = 2;
+       initiation_interval = 2;
+       op = SFU_OP;
+       break;
+   case LG2_OP: case RSQRT_OP:
+       latency = 4;
+       initiation_interval = 4;
+       op = SFU_OP;
+       break;
+   case SQRT_OP: case SIN_OP: case COS_OP: case EX2_OP:
+      latency = 10;
+      initiation_interval = 4;
+      op = SFU_OP;
+      break;
+   case DIV_OP: 
       // Floating point only
-      if( pI->get_type() == F32_TYPE || pI->get_type() == F64_TYPE ) {
-         *cycles = 4;         
-         *op = SFU_OP;
+      if( get_type() == F32_TYPE || get_type() == F64_TYPE ) {
+         latency = 10;
+         initiation_interval = 4;
+         op = SFU_OP;
       }
-   }
-   // Integer instructions
-   if( opcode == MUL_OP ) {
-      if( pI->get_type() == B32_TYPE || pI->get_type() == U32_TYPE || pI->get_type() == S32_TYPE ) {
+      break;
+   case MUL_OP:
+      if( get_type() == B32_TYPE || get_type() == U32_TYPE || get_type() == S32_TYPE ) {
          // 32-bit integer instruction
-         *cycles = 5;
-         *op = SFU_OP;
+         latency = 24;
+         initiation_interval = 5;
+         op = SFU_OP;
       }
-      if( pI->get_type() == F32_TYPE || pI->get_type() == F64_TYPE ) 
-         *op = ALU_SFU_OP;
-   }
-   if( opcode == MAD_OP ) {
-       if( pI->get_type() == B32_TYPE || pI->get_type() == U32_TYPE || pI->get_type() == S32_TYPE ) {
+      if( get_type() == F32_TYPE || get_type() == F64_TYPE ) {
+         op = ALU_SFU_OP;
+      }
+      break;
+   case MAD_OP:
+       if( get_type() == B32_TYPE || get_type() == U32_TYPE || get_type() == S32_TYPE ) {
           // 32-bit integer instruction
-          *cycles = 6;
-          *op = SFU_OP;
+          latency = 30;
+          initiation_interval = 6;
+          op = SFU_OP;
        }
-    }
+       break;
+   default: 
+       break;
+   }
 }
 
 void ptx_thread_info::ptx_fetch_inst( inst_t &inst ) const
@@ -519,7 +522,6 @@ void ptx_instruction::pre_decode()
    ar2 = 0;
 
    bool has_dst = false ;
-   int opcode = get_opcode(); //determine the opcode
 
    switch ( get_opcode() ) {
 #define OP_DEF(OP,FUNC,STR,DST,CLASSIFICATION) case OP: has_dst = (DST!=0); break;
@@ -530,7 +532,7 @@ void ptx_instruction::pre_decode()
       break;
    }
 
-   get_opcode_info(this,opcode,&cycles,&op);
+   get_opcode_info();
 
    // Get register operands
    int n=0,m=0;
-- 
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