projects / pdp8.git / blame
| Commit | Line | Data |
|---|---|---|
| 81e70d48 PH |
1 | / \ e HPCOND.RA\r |
| 2 | /\r | |
| 3 | SECT #COND\r | |
| 4 | ENTRY NCOND / FORTRAN INTEGER FUNCTION\r | |
| 5 | ENTRY COND / FORTRAN REAL FUNCTION\r | |
| 6 | /\r | |
| 7 | / ODD NUMBER OF PARAMETERS: I=NCOND(LA,A,LB,B,...,LY,Y,Z)\r | |
| 8 | / NCOND:=.IF LA .THEN A .ELIF LB .THEN B .ELIF ... .ELSE Z .FI\r | |
| 9 | / EVEN NUMBER OF PARAMETERS: I=NCOND(LA,A,LB,B,...,LZ,Z)\r | |
| 10 | / NCOND:=.IF LA .THEN A .ELIF .... .ELIF LZ .THEN Z .ELSE 0 .FI\r | |
| 11 | /\r | |
| 12 | X0= 0\r | |
| 13 | X1= X0+1\r | |
| 14 | X2= X1+1\r | |
| 15 | XR, ORG .+X2+1\r | |
| 16 | / TEXT 'NCOND '\r | |
| 17 | /CXR, SETX XR\r | |
| 18 | / SETB BAS\r | |
| 19 | BAS, ORG .+3\r | |
| 20 | T1, ORG .+3 / POINTER INTO PARAMETER LIST\r | |
| 21 | T2, ORG .+3 / HOLD ADR. OF PARAMETERS\r | |
| 22 | RETURN, JA .;0 / RETURN ADR\r | |
| 23 | TWO, 0;0;2\r | |
| 24 | / ORG 10*3+BAS / COMPLETE BASE PAGE IS NOT USED HERE\r | |
| 25 | / FNOP\r | |
| 26 | / JA CXR\r | |
| 27 | /\r | |
| 28 | /\r | |
| 29 | BASE 0\r | |
| 30 | NCOND,\r | |
| 31 | COND,\r | |
| 32 | STARTD\r | |
| 33 | FLDA 3*10 / GET RETURN ADR\r | |
| 34 | FSTA RETURN\r | |
| 35 | FLDA 0 / POINTER TO PARAMETER LIST --> T1\r | |
| 36 | SETB BAS\r | |
| 37 | BASE BAS\r | |
| 38 | FSTA T1\r | |
| 39 | FLDA% T1 / RETURN ADR --> FAC\r | |
| 40 | FSUB T1 / AND COMPUTE LENGTH OF PARAMETER LIST\r | |
| 41 | FSUB TWO\r | |
| 42 | SETX XR\r | |
| 43 | LDX 1,X2 / SHIFT ONE BIT TO THE RIGHT\r | |
| 44 | ALN X2 / DIVIDE BY TWO AND BUMP NO. OF PARAMETERS\r | |
| 45 | FNEG / INTO X2\r | |
| 46 | ATX X2\r | |
| 47 | LDX 0,X1 / SET UP POINTER\r | |
| 48 | STARTF\r | |
| 49 | JEQ RETURN / NO PARAMETERS AT ALL, RETURN WITH FAC=0\r | |
| 50 | /\r | |
| 51 | /\r | |
| 52 | LOOP,\r | |
| 53 | STARTD / LOAD AND TEST THE ODD NUMBERED PARAMETERS\r | |
| 54 | FLDA% T1,X1+\r | |
| 55 | FSTA T2 / STORE THE ADR. OF THE PARAMETER\r | |
| 56 | STARTF\r | |
| 57 | FLDA% T2 / AND LOAD IT'S VALUE\r | |
| 58 | JNE TRUE / WE FOUND A NONZERO SWITCH\r | |
| 59 | /\r | |
| 60 | JXN C1,X2+ / IF THERE ARE NO PARAMETERS LEFT THEN\r | |
| 61 | JA RETURN / RETURN WITH FAC=0 ELSE\r | |
| 62 | /\r | |
| 63 | C1, ADDX 1,X1 / SKIP THE EVEN NUMBERED PARAMETER\r | |
| 64 | JXN LOOP,X2+ / IF THIS WAS THE LAST PARAMETER THEN\r | |
| 65 | JA RETURN / RETURN WITH FAC =0 ELSE GET NEXT PAIR OF PARAMETERS\r | |
| 66 | /\r | |
| 67 | /\r | |
| 68 | TRUE, JXN C2,X2+ / IF THERE IS A ODD NUMBER OF PARAMETERS\r | |
| 69 | JA RETURN / THEN RETURN WITH FAC=LAST PARAMETER ELSE\r | |
| 70 | C2,\r | |
| 71 | STARTD\r | |
| 72 | FLDA% T1,X1+ / RETURN THE EVEN NUMBERED PARAMETER\r | |
| 73 | FSTA T2\r | |
| 74 | STARTF\r | |
| 75 | FLDA% T2\r | |
| 76 | JA RETURN\r | |
| 77 | END\r | |
| 78 | \1a\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 |