[pcsx_rearmed.git] / frontend / cspace_arm.S

/*
 * (C) Gražvydas "notaz" Ignotas, 2013
 *
 * This work is licensed under the terms of GNU GPL version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#include "arm_features.h"

.text
.align 2

@ lr=0x001f001f
@ trashes r11, r12
.macro bgr555_to_rgb565_one rn
    and      r11, lr, \rn
    and      r12, lr, \rn, lsr #5
    and      \rn, lr, \rn, lsr #10
    orr      r12, r11, lsl #5
    orr      \rn, r12, lsl #6
.endm

.macro pld_ reg offs=#0
#ifdef HAVE_ARMV6
    pld      [\reg, \offs]
#endif
.endm

.global bgr555_to_rgb565 @ void *dst, const void *src, int bytes
bgr555_to_rgb565:
    pld_     r1
    push     {r4-r11,lr}
    mov      lr, #0x001f
    subs     r2, #4*8
    orr      lr, lr, lsl #16
    blt      1f

0:
    ldmia    r1!, {r3-r10}
    subs     r2, #4*8
    bgr555_to_rgb565_one r3

    pld_     r1, #32*2
    bgr555_to_rgb565_one r4
    bgr555_to_rgb565_one r5
    bgr555_to_rgb565_one r6
    bgr555_to_rgb565_one r7
    bgr555_to_rgb565_one r8
    bgr555_to_rgb565_one r9
    bgr555_to_rgb565_one r10
    stmia    r0!, {r3-r10}
    bge      0b

1:
    adds     r2, #4*8
    popeq    {r4-r11,pc}

2:
    ldr      r3, [r1], #4
    subs     r2, #4
    bgr555_to_rgb565_one r3
    str      r3, [r0], #4
    bgt      2b

    pop      {r4-r11,pc}
Commit	Line	Data
d57557c0	1	/*
	2	* (C) Gražvydas "notaz" Ignotas, 2013
	3	*
	4	* This work is licensed under the terms of GNU GPL version 2 or later.
	5	* See the COPYING file in the top-level directory.
	6	*/
	7
	8	#include "arm_features.h"
	9
	10	.text
	11	.align 2
	12
	13	@ lr=0x001f001f
	14	@ trashes r11, r12
	15	.macro bgr555_to_rgb565_one rn
	16	and r11, lr, \rn
	17	and r12, lr, \rn, lsr #5
	18	and \rn, lr, \rn, lsr #10
	19	orr r12, r11, lsl #5
	20	orr \rn, r12, lsl #6
	21	.endm
	22
	23	.macro pld_ reg offs=#0
	24	#ifdef HAVE_ARMV6
	25	pld [\reg, \offs]
	26	#endif
	27	.endm
	28
	29	.global bgr555_to_rgb565 @ void dst, const void src, int bytes
	30	bgr555_to_rgb565:
	31	pld_ r1
	32	push {r4-r11,lr}
	33	mov lr, #0x001f
	34	subs r2, #4*8
	35	orr lr, lr, lsl #16
	36	blt 1f
	37
	38	0:
	39	ldmia r1!, {r3-r10}
	40	subs r2, #4*8
	41	bgr555_to_rgb565_one r3
	42
	43	pld_ r1, #32*2
	44	bgr555_to_rgb565_one r4
	45	bgr555_to_rgb565_one r5
	46	bgr555_to_rgb565_one r6
	47	bgr555_to_rgb565_one r7
	48	bgr555_to_rgb565_one r8
	49	bgr555_to_rgb565_one r9
	50	bgr555_to_rgb565_one r10
	51	stmia r0!, {r3-r10}
	52	bge 0b
	53
	54	1:
	55	adds r2, #4*8
	56	popeq {r4-r11,pc}
	57
	58	2:
	59	ldr r3, [r1], #4
	60	subs r2, #4
	61	bgr555_to_rgb565_one r3
	62	str r3, [r0], #4
	63	bgt 2b
	64
65	pop {r4-r11,pc}