try to workaround some libretro builds lacking version

[pcsx_rearmed.git] / deps / libchdr / deps / lzma-22.01 / src / Asm / arm / 7zCrcOpt.asm

	CODE32\r
\r
	EXPORT	|CrcUpdateT4@16|\r
\r
	AREA	|.text|, CODE, ARM\r
\r
	MACRO\r
	CRC32_STEP_1\r
\r
	ldrb    r4, [r1], #1\r
	subs    r2, r2, #1\r
	eor     r4, r4, r0\r
	and     r4, r4, #0xFF\r
	ldr     r4, [r3, +r4, lsl #2]\r
	eor     r0, r4, r0, lsr #8\r
\r
	MEND\r
\r
\r
	MACRO\r
	CRC32_STEP_4 $STREAM_WORD\r
	\r
	eor     r7, r7, r8\r
	eor     r7, r7, r9\r
	eor     r0, r0, r7\r
	eor     r0, r0, $STREAM_WORD\r
	ldr     $STREAM_WORD, [r1], #4\r
	\r
	and     r7, r0, #0xFF\r
	and     r8, r0, #0xFF00\r
	and     r9, r0, #0xFF0000\r
	and     r0, r0, #0xFF000000\r
\r
	ldr     r7, [r6, +r7, lsl #2]\r
	ldr     r8, [r5, +r8, lsr #6]\r
	ldr     r9, [r4, +r9, lsr #14]\r
	ldr     r0, [r3, +r0, lsr #22]\r
	\r
	MEND\r
\r
\r
|CrcUpdateT4@16| PROC\r
\r
	stmdb   sp!, {r4-r11, lr}\r
	cmp     r2, #0\r
	beq     |$fin|\r
\r
|$v1|\r
	tst     r1, #7\r
	beq     |$v2|\r
	CRC32_STEP_1\r
	bne     |$v1|\r
\r
|$v2|\r
	cmp     r2, #16\r
	blo     |$v3|\r
\r
	ldr     r10, [r1], #4\r
	ldr     r11, [r1], #4\r
\r
	add     r4, r3, #0x400 \r
	add     r5, r3, #0x800\r
	add     r6, r3, #0xC00\r
\r
	mov     r7, #0\r
	mov     r8, #0\r
	mov     r9, #0\r
\r
	sub     r2, r2, #16\r
\r
|$loop|\r
	; pld     [r1, #0x40]\r
\r
	CRC32_STEP_4 r10\r
	CRC32_STEP_4 r11\r
\r
	subs    r2, r2, #8\r
	bhs     |$loop|\r
\r
	sub     r1, r1, #8\r
	add     r2, r2, #16\r
\r
	eor     r7, r7, r8\r
	eor     r7, r7, r9\r
	eor     r0, r0, r7\r
\r
|$v3|\r
	cmp     r2, #0\r
	beq     |$fin|\r
\r
|$v4|\r
	CRC32_STEP_1\r
	bne     |$v4|\r
\r
|$fin|\r
	ldmia   sp!, {r4-r11, pc}\r
\r
|CrcUpdateT4@16| ENDP\r
\r
	END\r