1 %verify "executed" 2 /* 3 * Signed 64-bit integer multiply, 2-addr version 4 * 5 * We could definately use more free registers for 6 * this code. We must spill %edx (rIBASE) because it 7 * is used by imul. We'll also spill rINST (ebx), 8 * giving us eax, ebc, ecx and rIBASE as computational 9 * temps. On top of that, we'll spill %esi (edi) 10 * for use as the vA pointer and rFP (esi) for use 11 * as the vB pointer. Yuck. 12 */ 13 /* mul-long/2addr vA, vB */ 14 movzbl rINSTbl,%eax # eax<- BA 15 andb $$0xf,%al # eax<- A 16 sarl $$4,rINST # rINST<- B 17 SPILL_TMP2(%esi) 18 SPILL(rFP) 19 SPILL(rIBASE) 20 leal (rFP,%eax,4),%esi # %esi<- &v[A] 21 leal (rFP,rINST,4),rFP # rFP<- &v[B] 22 movl 4(%esi),%ecx # ecx<- Amsw 23 imull (rFP),%ecx # ecx<- (Amsw*Blsw) 24 movl 4(rFP),%eax # eax<- Bmsw 25 imull (%esi),%eax # eax<- (Bmsw*Alsw) 26 addl %eax,%ecx # ecx<- (Amsw*Blsw)+(Bmsw*Alsw) 27 movl (rFP),%eax # eax<- Blsw 28 mull (%esi) # eax<- (Blsw*Alsw) 29 leal (%ecx,rIBASE),rIBASE # full result now in %edx:%eax 30 movl rIBASE,4(%esi) # v[A+1]<- rIBASE 31 movl %eax,(%esi) # v[A]<- %eax 32 UNSPILL_TMP2(%esi) 33 FETCH_INST_OPCODE 1 %ecx 34 UNSPILL(rIBASE) 35 UNSPILL(rFP) 36 ADVANCE_PC 1 37 GOTO_NEXT_R %ecx 38
