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Diffstat (limited to 'plugins/gpu_unai/gpu_arm.S')
| -rw-r--r-- | plugins/gpu_unai/gpu_arm.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/plugins/gpu_unai/gpu_arm.S b/plugins/gpu_unai/gpu_arm.S new file mode 100644 index 0000000..ec87f21 --- /dev/null +++ b/plugins/gpu_unai/gpu_arm.S @@ -0,0 +1,56 @@ +/* + * (C) GraÅžvydas "notaz" Ignotas, 2011 + * + * 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 + +@ in: r0=dst, r2=pal, r12=0x1e +@ trashes r6-r8,lr,flags +.macro do_4_pixels rs ibase obase +.if \ibase - 1 < 0 + and r6, r12, \rs, lsl #1 +.else + and r6, r12, \rs, lsr #\ibase-1 +.endif + and r7, r12, \rs, lsr #\ibase+3 + and r8, r12, \rs, lsr #\ibase+7 + and lr, r12, \rs, lsr #\ibase+11 + ldrh r6, [r2, r6] + ldrh r7, [r2, r7] + ldrh r8, [r2, r8] + ldrh lr, [r2, lr] + tst r6, r6 + strneh r6, [r0, #\obase+0] + tst r7, r7 + strneh r7, [r0, #\obase+2] + tst r8, r8 + strneh r8, [r0, #\obase+4] + tst lr, lr + strneh lr, [r0, #\obase+6] +.endm + +.global draw_spr16_full @ (u16 *d, void *s, u16 *pal, int lines) +draw_spr16_full: + stmfd sp!, {r4-r8,lr} + mov r12, #0x1e @ empty pixel + +0: + ldmia r1, {r4,r5} + do_4_pixels r4, 0, 0 + do_4_pixels r4, 16, 8 + do_4_pixels r5, 0, 16 + do_4_pixels r5, 16, 24 + subs r3, r3, #1 + add r0, r0, #2048 + add r1, r1, #2048 + bgt 0b + + ldmfd sp!, {r4-r8,pc} + +@ vim:filetype=armasm |