| in_cksum_arm.S (130164) | in_cksum_arm.S (137463) |
|---|---|
| 1/* $NetBSD: in_cksum_arm.S,v 1.2 2003/09/23 10:01:36 scw Exp $ */ 2 3/* 4 * Copyright 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Steve C. Woodford for Wasabi Systems, Inc. 8 * --- 30 unchanged lines hidden (view full) --- 39/* 40 * Hand-optimised in_cksum() and in4_cksum() implementations for ARM/Xscale 41 */ 42 43#include "opt_inet.h" 44 45#include <machine/asm.h> 46#include "assym.s" | 1/* $NetBSD: in_cksum_arm.S,v 1.2 2003/09/23 10:01:36 scw Exp $ */ 2 3/* 4 * Copyright 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Steve C. Woodford for Wasabi Systems, Inc. 8 * --- 30 unchanged lines hidden (view full) --- 39/* 40 * Hand-optimised in_cksum() and in4_cksum() implementations for ARM/Xscale 41 */ 42 43#include "opt_inet.h" 44 45#include <machine/asm.h> 46#include "assym.s" |
| 47__FBSDID("$FreeBSD: head/sys/arm/arm/in_cksum_arm.S 130164 2004-06-06 21:26:49Z phk $"); | 47__FBSDID("$FreeBSD: head/sys/arm/arm/in_cksum_arm.S 137463 2004-11-09 16:47:47Z cognet $"); |
| 48 49/* 50 * int in_cksum(struct mbuf *m, int len) 51 * 52 * Entry: 53 * r0 m 54 * r1 len 55 * --- 213 unchanged lines hidden (view full) --- 269 orrne r2, r2, r6, lsl #16 270#else 271 orreq r2, r4, r5, lsl #8 272 orreq r2, r2, r6, lsl #16 273 orrne r2, r5, r4, lsl #8 274 orrne r2, r2, r6, lsl #24 275#endif 276 subs r1, r1, r7 /* Update length */ | 48 49/* 50 * int in_cksum(struct mbuf *m, int len) 51 * 52 * Entry: 53 * r0 m 54 * r1 len 55 * --- 213 unchanged lines hidden (view full) --- 269 orrne r2, r2, r6, lsl #16 270#else 271 orreq r2, r4, r5, lsl #8 272 orreq r2, r2, r6, lsl #16 273 orrne r2, r5, r4, lsl #8 274 orrne r2, r2, r6, lsl #24 275#endif 276 subs r1, r1, r7 /* Update length */ |
| 277 moveq pc, lr /* All done? */ | 277 RETeq /* All done? */ |
| 278 279 /* Buffer is now word aligned */ 280.Lcksumdata_wordaligned: 281#ifdef __XSCALE__ 282 cmp r1, #0x04 /* Less than 4 bytes left? */ 283 blt .Lcksumdata_endgame /* Yup */ 284 285 /* Now quad-align, if necessary */ --- 75 unchanged lines hidden (view full) --- 361 adcs r2, r2, r7 362 adc r2, r2, #0x00 363 subs r1, r1, #0x40 364 bge .Lcksumdata_bigloop 365.Lcksumdata_bigloop_end: 366#endif 367 368 adds r1, r1, #0x40 | 278 279 /* Buffer is now word aligned */ 280.Lcksumdata_wordaligned: 281#ifdef __XSCALE__ 282 cmp r1, #0x04 /* Less than 4 bytes left? */ 283 blt .Lcksumdata_endgame /* Yup */ 284 285 /* Now quad-align, if necessary */ --- 75 unchanged lines hidden (view full) --- 361 adcs r2, r2, r7 362 adc r2, r2, #0x00 363 subs r1, r1, #0x40 364 bge .Lcksumdata_bigloop 365.Lcksumdata_bigloop_end: 366#endif 367 368 adds r1, r1, #0x40 |
| 369 moveq pc, lr | 369 RETeq |
| 370 cmp r1, #0x20 371 372#ifdef __XSCALE__ 373 ldrged r4, [r0], #0x08 /* Avoid stalling pld and result */ 374 blt .Lcksumdata_less_than_32 375 pld [r0, #0x18] 376 ldrd r6, [r0], #0x08 377 adds r2, r2, r4 --- 16 unchanged lines hidden (view full) --- 394 adcs r2, r2, r6 395 adcs r2, r2, r3 396 adcs r2, r2, r4 397 adcs r2, r2, r5 398 adcs r2, r2, r7 399#endif 400 adc r2, r2, #0x00 401 subs r1, r1, #0x20 | 370 cmp r1, #0x20 371 372#ifdef __XSCALE__ 373 ldrged r4, [r0], #0x08 /* Avoid stalling pld and result */ 374 blt .Lcksumdata_less_than_32 375 pld [r0, #0x18] 376 ldrd r6, [r0], #0x08 377 adds r2, r2, r4 --- 16 unchanged lines hidden (view full) --- 394 adcs r2, r2, r6 395 adcs r2, r2, r3 396 adcs r2, r2, r4 397 adcs r2, r2, r5 398 adcs r2, r2, r7 399#endif 400 adc r2, r2, #0x00 401 subs r1, r1, #0x20 |
| 402 moveq pc, lr | 402 RETeq |
| 403 404.Lcksumdata_less_than_32: 405 /* There are less than 32 bytes left */ 406 and r3, r1, #0x18 407 rsb r4, r3, #0x18 408 sub r1, r1, r3 409 adds r4, r4, r4, lsr #1 /* Side effect: Clear carry flag */ 410 addne pc, pc, r4 --- 26 unchanged lines hidden (view full) --- 437 ldr r4, [r0], #0x04 438 sub r1, r1, #0x04 439 adds r2, r2, r4 440 adc r2, r2, #0x00 441 442 /* Deal with < 4 bytes remaining */ 443.Lcksumdata_lessthan4: 444 adds r1, r1, #0x04 | 403 404.Lcksumdata_less_than_32: 405 /* There are less than 32 bytes left */ 406 and r3, r1, #0x18 407 rsb r4, r3, #0x18 408 sub r1, r1, r3 409 adds r4, r4, r4, lsr #1 /* Side effect: Clear carry flag */ 410 addne pc, pc, r4 --- 26 unchanged lines hidden (view full) --- 437 ldr r4, [r0], #0x04 438 sub r1, r1, #0x04 439 adds r2, r2, r4 440 adc r2, r2, #0x00 441 442 /* Deal with < 4 bytes remaining */ 443.Lcksumdata_lessthan4: 444 adds r1, r1, #0x04 |
| 445 moveq pc, lr | 445 RETeq |
| 446 447 /* Deal with 1 to 3 remaining bytes, possibly misaligned */ 448.Lcksumdata_endgame: 449 ldrb r3, [r0] /* Fetch first byte */ 450 cmp r1, #0x02 451 ldrgeb r4, [r0, #0x01] /* Fetch 2nd and 3rd as necessary */ 452 movlt r4, #0x00 453 ldrgtb r5, [r0, #0x02] --- 8 unchanged lines hidden (view full) --- 462#else 463 orreq r3, r3, r4, lsl #8 464 orreq r3, r3, r5, lsl #16 465 orrne r3, r4, r3, lsl #8 466 orrne r3, r3, r5, lsl #24 467#endif 468 adds r2, r2, r3 469 adc r2, r2, #0x00 | 446 447 /* Deal with 1 to 3 remaining bytes, possibly misaligned */ 448.Lcksumdata_endgame: 449 ldrb r3, [r0] /* Fetch first byte */ 450 cmp r1, #0x02 451 ldrgeb r4, [r0, #0x01] /* Fetch 2nd and 3rd as necessary */ 452 movlt r4, #0x00 453 ldrgtb r5, [r0, #0x02] --- 8 unchanged lines hidden (view full) --- 462#else 463 orreq r3, r3, r4, lsl #8 464 orreq r3, r3, r5, lsl #16 465 orrne r3, r4, r3, lsl #8 466 orrne r3, r3, r5, lsl #24 467#endif 468 adds r2, r2, r3 469 adc r2, r2, #0x00 |
| 470 mov pc, lr | 470 RET |