diff options
Diffstat (limited to 'src/cuda-sim/instructions.cc')
| -rw-r--r-- | src/cuda-sim/instructions.cc | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/cuda-sim/instructions.cc b/src/cuda-sim/instructions.cc index def0c55..37e5d00 100644 --- a/src/cuda-sim/instructions.cc +++ b/src/cuda-sim/instructions.cc @@ -2261,6 +2261,9 @@ void mad_def( const ptx_instruction *pI, ptx_thread_info *thread, bool use_carry const operand_info &src3 = pI->src3(); ptx_reg_t d, t; + int carry=0; + int overflow=0; + unsigned i_type = pI->get_type(); ptx_reg_t a = thread->get_operand_value(src1, dst, i_type, thread, 1); ptx_reg_t b = thread->get_operand_value(src2, dst, i_type, thread, 1); @@ -2272,7 +2275,8 @@ void mad_def( const ptx_instruction *pI, ptx_thread_info *thread, bool use_carry if (use_carry) { const operand_info &carry = pI->operand_lookup(4); carry_bit = thread->get_operand_value(carry, dst, PRED_TYPE, thread, 0); - carry_bit.pred &= 0x4; + carry_bit.pred &= 0x4; + carry_bit.pred >>=2; } unsigned rounding_mode = pI->rounding_mode(); @@ -2284,6 +2288,7 @@ void mad_def( const ptx_instruction *pI, ptx_thread_info *thread, bool use_carry else if ( pI->is_hi() ) d.s16 = (t.s32>>16) + c.s16 + carry_bit.pred; else if ( pI->is_lo() ) d.s16 = t.s16 + c.s16 + carry_bit.pred; else assert(0); + carry = ((long long int)(t.s32 + c.s32 + carry_bit.pred)&0x100000000)>>32; break; case S32_TYPE: t.s64 = a.s32 * b.s32; @@ -2306,6 +2311,7 @@ void mad_def( const ptx_instruction *pI, ptx_thread_info *thread, bool use_carry else if ( pI->is_hi() ) d.u16 = (t.u32 + c.u16 + carry_bit.pred)>>16; else if ( pI->is_lo() ) d.u16 = t.u16 + c.u16 + carry_bit.pred; else assert(0); + carry = ((long long int)((long long int)t.u32 + c.u32 + carry_bit.pred)&0x100000000)>>32; break; case U32_TYPE: t.u64 = a.u32 * b.u32; @@ -2361,7 +2367,7 @@ void mad_def( const ptx_instruction *pI, ptx_thread_info *thread, bool use_carry assert(0); break; } - thread->set_operand_value(dst, d, i_type, thread, pI); + thread->set_operand_value(dst, d, i_type, thread, pI, overflow, carry); } bool isNaN(float x) |