| 1 | /* $NetBSD: asm.h,v 1.22 2015/10/17 19:29:48 nakayama Exp $ */ |
| 2 | |
| 3 | #include <sparc/asm.h> |
| 4 | |
| 5 | /* |
| 6 | * Here are some defines to try to maintain consistency but still |
| 7 | * support 32-and 64-bit compilers. |
| 8 | */ |
| 9 | #ifdef _LP64 |
| 10 | /* reg that points to base of data/text segment */ |
| 11 | #define BASEREG %g4 |
| 12 | /* first constants for storage allocation */ |
| 13 | #define LNGSZ 8 |
| 14 | #define LNGSHFT 3 |
| 15 | #define PTRSZ 8 |
| 16 | #define PTRSHFT 3 |
| 17 | #define POINTER .xword |
| 18 | #define ULONG .xword |
| 19 | /* Now instructions to load/store pointers & long ints */ |
| 20 | #define LDLNG ldx |
| 21 | #define LDULNG ldx |
| 22 | #define STLNG stx |
| 23 | #define STULNG stx |
| 24 | #define LDPTR ldx |
| 25 | #define LDPTRA ldxa |
| 26 | #define STPTR stx |
| 27 | #define STPTRA stxa |
| 28 | #define CASPTR casx |
| 29 | #define CASPTRA casxa |
| 30 | /* Now something to calculate the stack bias */ |
| 31 | #define STKB BIAS |
| 32 | #define CCCR %xcc |
| 33 | #else |
| 34 | #define BASEREG %g0 |
| 35 | #define LNGSZ 4 |
| 36 | #define LNGSHFT 2 |
| 37 | #define PTRSZ 4 |
| 38 | #define PTRSHFT 2 |
| 39 | #define POINTER .word |
| 40 | #define ULONG .word |
| 41 | /* Instructions to load/store pointers & long ints */ |
| 42 | #define LDLNG ldsw |
| 43 | #define LDULNG lduw |
| 44 | #define STLNG stw |
| 45 | #define STULNG stw |
| 46 | #define LDPTR lduw |
| 47 | #define LDPTRA lduwa |
| 48 | #define STPTR stw |
| 49 | #define STPTRA stwa |
| 50 | #define CASPTR cas |
| 51 | #define CASPTRA casa |
| 52 | #define STKB 0 |
| 53 | #define CCCR %icc |
| 54 | #endif |
| 55 | |
| 56 | #if defined(_KERNEL) || defined(_RUMPKERNEL) |
| 57 | /* Give this real authority: reset the machine */ |
| 58 | #define NOTREACHED sir |
| 59 | #else |
| 60 | #define NOTREACHED |
| 61 | #endif |
| 62 | |
| 63 | /* if < 32, copy by bytes, memcpy, kcopy, ... */ |
| 64 | #define BCOPY_SMALL 32 |
| 65 | |
| 66 | /* use as needed to align things on longword boundaries */ |
| 67 | #define _ALIGN .align 8 |
| 68 | #define ICACHE_ALIGN .align 32 |
| 69 | |
| 70 | /* |
| 71 | * Combine 2 regs -- used to convert 64-bit ILP32 |
| 72 | * values to LP64. |
| 73 | */ |
| 74 | #define COMBINE(r1, r2, d) \ |
| 75 | clruw r2; \ |
| 76 | sllx r1, 32, d; \ |
| 77 | or d, r2, d |
| 78 | |
| 79 | /* |
| 80 | * Split 64-bit value in 1 reg into high and low halves. |
| 81 | * Used for ILP32 return values. |
| 82 | */ |
| 83 | #define SPLIT(s, r0, r1) \ |
| 84 | srl s, 0, r1; \ |
| 85 | srlx s, 32, r0 |
| 86 | |
| 87 | #define SPLIT_RETL(s, r0, r1) \ |
| 88 | srl s, 0, r1; \ |
| 89 | retl; \ |
| 90 | srlx s, 32, r0 |