| /* | |
| * Signed 64-bit integer multiply. | |
| * | |
| * We could definately use more free registers for | |
| * this code. We spill rINSTw (ebx), | |
| * giving us eax, ebc, ecx and edx as computational | |
| * temps. On top of that, we'll spill edi (rFP) | |
| * for use as the vB pointer and esi (rPC) for use | |
| * as the vC pointer. Yuck. | |
| * | |
| */ | |
| /* mul-long vAA, vBB, vCC */ | |
| movzbl 2(rPC), %eax # eax <- B | |
| movzbl 3(rPC), %ecx # ecx <- C | |
| mov rPC, LOCAL0(%esp) # save Interpreter PC | |
| mov rFP, LOCAL1(%esp) # save FP | |
| mov rIBASE, LOCAL2(%esp) # save rIBASE | |
| leal (rFP,%eax,4), %esi # esi <- &v[B] | |
| leal (rFP,%ecx,4), rFP # rFP <- &v[C] | |
| movl 4(%esi), %ecx # ecx <- Bmsw | |
| imull (rFP), %ecx # ecx <- (Bmsw*Clsw) | |
| movl 4(rFP), %eax # eax <- Cmsw | |
| imull (%esi), %eax # eax <- (Cmsw*Blsw) | |
| addl %eax, %ecx # ecx <- (Bmsw*Clsw)+(Cmsw*Blsw) | |
| movl (rFP), %eax # eax <- Clsw | |
| mull (%esi) # eax <- (Clsw*Alsw) | |
| mov LOCAL0(%esp), rPC # restore Interpreter PC | |
| mov LOCAL1(%esp), rFP # restore FP | |
| leal (%ecx,rIBASE), rIBASE # full result now in rIBASE:%eax | |
| SET_VREG_HIGH rIBASE, rINST # v[B+1] <- rIBASE | |
| mov LOCAL2(%esp), rIBASE # restore IBASE | |
| SET_VREG %eax, rINST # v[B] <- eax | |
| ADVANCE_PC_FETCH_AND_GOTO_NEXT 2 |