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Commit 9f3f552e authored by LuK1337's avatar LuK1337 Committed by MajorP93
Browse files

erofs: lz4armv8: Make it compile with IAS 

`LOCAL` is not supported by llvm-as.

Change-Id: Id2b4541ecad77fd3287a7c115982f41f0b32a9f3
parent 9edd7c0a

fs/erofs/lz4armv8/lz4armv8.S

+31 −38
Original line number Diff line number Diff line
@@ -67,13 +67,6 @@ 


.altmacro

.macro lz4_decompress_asm_generic	doprfm=1

LOCAL Lz4_decompress_begin, Decode_token, Get_literal_length

LOCAL Copy_long_literal_hs_15, Copy_long_literal_loop

LOCAL Copy_literal_lt_15, Decode_offset_matchlength

LOCAL Get_long_matchlength, Copy_match_begin

LOCAL Cond_offset_lt_matchlength, Copy_offset_lt_32

LOCAL Copy_match_perm, Copy_offset_lt_32_loop

LOCAL Cond_offset_ge_matchlength, Copy_offset_ge_match_loop

	stp     x29, x30, [sp, #-16]!

	mov     x29, sp

	stp	x3, x0, [sp, #-16]!		/* push src and dst in stack */
@@ -82,7 +75,7 @@ LOCAL Cond_offset_ge_matchlength, Copy_offset_ge_match_loop 
	adr	permtable_addr, Permtable

	adr	cplen_table_addr, Copylength_table



Lz4_decompress_begin:

Lz4_decompress_begin\@:

	/*

	 * save current dst and src ,ensure when return from asm routine

	 * current both of "dst" and "src" save good position.
@@ -96,12 +89,12 @@ Lz4_decompress_begin: 
.if \doprfm

	add tmp, x0, #512

	cmp x2, tmp

	b.ls Decode_token

	b.ls Decode_token\@

	prfm pstl2strm,[x0,#512]

.endif



	/* Decode Token Byte: */

Decode_token:

Decode_token\@:

	ldrb	w_tmp, [x3], #1		/* read Token Byte */

	lsr	literal_length, tmp, #4	/* get literal_length */

	and	tmp_match_length, tmp, #0xf	/* get match_length */
@@ -112,21 +105,21 @@ Decode_token: 
	 * or more bytes are liteal bytes.

	 */

	cmp	literal_length, #14

	b.ls	Copy_literal_lt_15

	b.ls	Copy_literal_lt_15\@



	/*

	 * literal_length == 15 : more literal length bytes after TokenByte.

	 * continue decoding more literal length bytes.

	 */

Get_literal_length:

Get_literal_length\@:

	check_src_overflow

	ldrb	w_tmp, [x3], #1

	add	literal_length, literal_length, tmp

	cmp	tmp, #255

	b.eq	Get_literal_length

	b.eq	Get_literal_length\@



/* literal copy */

Copy_long_literal_hs_15:

Copy_long_literal_hs_15\@:

	mov	copy_from_ptr, x3

	mov	copy_to_ptr, x0

	add	x3, x3, literal_length
@@ -134,22 +127,22 @@ Copy_long_literal_hs_15: 
	check_dst_overflow

	check_src_overflow



Copy_long_literal_loop:

Copy_long_literal_loop\@:

	ldr	q0, [copy_from_ptr], #16

	str	q0, [copy_to_ptr], #16



	cmp	x0, copy_to_ptr

	b.ls	Decode_offset_matchlength

	b	Copy_long_literal_loop

	b.ls	Decode_offset_matchlength\@

	b	Copy_long_literal_loop\@



Copy_literal_lt_15:

Copy_literal_lt_15\@:

	ldr q0, [x3]

	str q0, [x0]

	add	x3, x3, literal_length

	add	x0, x0, literal_length



	/* Decode offset and match_length */

Decode_offset_matchlength:

Decode_offset_matchlength\@:

	mov	offset_src_ptr, x3

	ldrh	w_offset, [x3], #2	/* 2Byte:offset bytes */

	cbz	offset, Failed			/* match_length == 0 is invalid */
@@ -162,68 +155,68 @@ Decode_offset_matchlength: 
	 */

	add	x0, x0, match_length

	cmp	match_length, #19

	b.lo	Copy_match_begin

	b.lo	Copy_match_begin\@

	/*

	 * continue decoding more match length bytes.

	 */

Get_long_matchlength:

Get_long_matchlength\@:

	check_src_overflow1

	ldrb	w_tmp, [x3], #1

	add	x0, x0, tmp

	add	match_length, match_length, tmp

	cmp	tmp, #255

	b.eq	Get_long_matchlength

	b.eq	Get_long_matchlength\@



	/*

	 * here got the matchlength,start "match copy".

	 */

Copy_match_begin:

Copy_match_begin\@:

	check_dst_overflow1

	cmp	offset , match_length

	b.hs	Cond_offset_ge_matchlength

	b.hs	Cond_offset_ge_matchlength\@



Cond_offset_lt_matchlength:

Cond_offset_lt_matchlength\@:

	cmp	offset , #32

	b.hs	Cond_offset_ge_matchlength

	b.hs	Cond_offset_ge_matchlength\@



Copy_offset_lt_32:

Copy_offset_lt_32\@:

	ldr	q1, [copy_from_ptr]

	add	tmp, permtable_addr, offset, lsl #5

	ldp	q2, q3, [tmp]

	tbl	v0.16b, {v1.16b}, v2.16b

	tbl	v1.16b, {v1.16b}, v3.16b

	cmp     offset , #16

	b.lo    Copy_match_perm

	b.lo    Copy_match_perm\@

	ldp     q0, q1, [copy_from_ptr]

Copy_match_perm:

Copy_match_perm\@:

	ldrb	w_tmp, [cplen_table_addr, offset]

	stp	q0, q1, [copy_to_ptr]

	add	copy_to_ptr, copy_to_ptr, tmp

	cmp	x0, copy_to_ptr

	b.ls	Lz4_decompress_begin

Copy_offset_lt_32_loop:

	b.ls	Lz4_decompress_begin\@

Copy_offset_lt_32_loop\@:

	stp	q0, q1, [copy_to_ptr]

	add	copy_to_ptr, copy_to_ptr, tmp

	stp	q0, q1, [copy_to_ptr]

	add	copy_to_ptr, copy_to_ptr, tmp

	cmp	x0, copy_to_ptr

	b.hi	Copy_offset_lt_32_loop

	b	Lz4_decompress_begin

	b.hi	Copy_offset_lt_32_loop\@

	b	Lz4_decompress_begin\@



/* offset >= match */

Cond_offset_ge_matchlength:

Cond_offset_ge_matchlength\@:

	ldr	q0, [copy_from_ptr], #16

	str	q0, [copy_to_ptr], #16



	cmp	x0, copy_to_ptr

	b.ls	Lz4_decompress_begin

Copy_offset_ge_match_loop:

	b.ls	Lz4_decompress_begin\@

Copy_offset_ge_match_loop\@:

	ldp	q0, q1, [copy_from_ptr], #32

	stp	q0, q1, [copy_to_ptr], #32



	cmp	x0, copy_to_ptr

	b.hi	Copy_offset_ge_match_loop

	b	Lz4_decompress_begin

	b.hi	Copy_offset_ge_match_loop\@

	b	Lz4_decompress_begin\@

.endm



.text