^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/alpha/lib/memset.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This is an efficient (and small) implementation of the C library "memset()"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * function for the alpha.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * (C) Copyright 1996 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * This routine is "moral-ware": you are free to use it any way you wish, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * the only obligation I put on you is a moral one: if you make any improvements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * to the routine, please send me your improvements for me to use similarly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * The scheduling comments are according to the EV5 documentation (and done by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * hand, so they might well be incorrect, please do tell me about it..)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) .set noat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) .set noreorder
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) .text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) .globl memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) .globl __memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) .globl ___memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) .globl __memset16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) .globl __constant_c_memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) .ent ___memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) ___memset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .frame $30,0,$26,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) .prologue 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) and $17,255,$1 /* E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) insbl $17,1,$17 /* .. E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) bis $17,$1,$17 /* E0 (p-c latency, next cycle) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) sll $17,16,$1 /* E1 (p-c latency, next cycle) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) bis $17,$1,$17 /* E0 (p-c latency, next cycle) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) sll $17,32,$1 /* E1 (p-c latency, next cycle) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) bis $17,$1,$17 /* E0 (p-c latency, next cycle) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) ldq_u $31,0($30) /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) __constant_c_memset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) addq $18,$16,$6 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) bis $16,$16,$0 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) xor $16,$6,$1 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ble $18,end /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) bic $1,7,$1 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) beq $1,within_one_quad /* .. E1 (note EV5 zero-latency forwarding) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) and $16,7,$3 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) beq $3,aligned /* .. E1 (note EV5 zero-latency forwarding) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ldq_u $4,0($16) /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) bis $16,$16,$5 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) insql $17,$16,$2 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) subq $3,8,$3 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) addq $18,$3,$18 /* E0 $18 is new count ($3 is negative) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) mskql $4,$16,$4 /* .. E1 (and possible load stall) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) subq $16,$3,$16 /* E0 $16 is new aligned destination */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) bis $2,$4,$1 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) bis $31,$31,$31 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) ldq_u $31,0($30) /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) stq_u $1,0($5) /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) bis $31,$31,$31 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .align 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) aligned:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) sra $18,3,$3 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) and $18,7,$18 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) bis $16,$16,$5 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) beq $3,no_quad /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .align 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) loop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) stq $17,0($5) /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) subq $3,1,$3 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) addq $5,8,$5 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) bne $3,loop /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) no_quad:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) bis $31,$31,$31 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) beq $18,end /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ldq $7,0($5) /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) mskqh $7,$6,$2 /* .. E1 (and load stall) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) insqh $17,$6,$4 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) bis $2,$4,$1 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) stq $1,0($5) /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ret $31,($26),1 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .align 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) within_one_quad:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ldq_u $1,0($16) /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) insql $17,$16,$2 /* E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) mskql $1,$16,$4 /* E0 (after load stall) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) bis $2,$4,$2 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) mskql $2,$6,$4 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) mskqh $1,$6,$2 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) bis $2,$4,$1 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) stq_u $1,0($16) /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ret $31,($26),1 /* E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .end ___memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) EXPORT_SYMBOL(___memset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) EXPORT_SYMBOL(__constant_c_memset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .ent __memset16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) __memset16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .prologue 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) inswl $17,0,$1 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) inswl $17,2,$2 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) inswl $17,4,$3 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) or $1,$2,$1 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) inswl $17,6,$4 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) or $1,$3,$1 /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) or $1,$4,$17 /* E0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) br __constant_c_memset /* .. E1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .end __memset16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) EXPORT_SYMBOL(__memset16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) memset = ___memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) __memset = ___memset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) EXPORT_SYMBOL(memset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) EXPORT_SYMBOL(__memset)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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