1 files changed, 121 insertions, 0 deletions
diff --git a/arm9/asm/GX_g2.s b/arm9/asm/GX_g2.s
new file mode 100644
index 00000000..7ed2f124
--- /dev/null
+++ b/arm9/asm/GX_g2.s
@@ -0,0 +1,121 @@
+    .include "asm/macros.inc"
+    .include "global.inc"
+
+    .text
+
+	arm_func_start G2x_ChangeBlendBrightness_
+G2x_ChangeBlendBrightness_: ; 0x020C7418
+	cmp r1, #0x0
+	ldrh r3, [r0, #0x0]
+	bge _020C7444
+	and r2, r3, #0xc0
+	cmp r2, #0x80
+	biceq r2, r3, #0xc0
+	orreq r2, r2, #0xc0
+	streqh r2, [r0, #0x0]
+	rsb r1, r1, #0x0
+	strh r1, [r0, #0x4]
+	bx lr
+_020C7444:
+	and r2, r3, #0xc0
+	cmp r2, #0xc0
+	biceq r2, r3, #0xc0
+	orreq r2, r2, #0x80
+	streqh r2, [r0, #0x0]
+	strh r1, [r0, #0x4]
+	bx lr
+
+	arm_func_start G2x_SetBlendBrightnessExt_
+G2x_SetBlendBrightnessExt_: ; 0x020C7460
+	stmdb sp!, {lr}
+	sub sp, sp, #0x4
+	ldr lr, [sp, #0x8]
+	ldr r12, [sp, #0xc]
+	orr r3, r3, lr, lsl #0x8
+	cmp r12, #0x0
+	orrge r1, r1, #0x80
+	strh r3, [r0, #0x2]
+	orrge r1, r1, r2, lsl #0x8
+	strgeh r1, [r0, #0x0]
+	strgeh r12, [r0, #0x4]
+	addge sp, sp, #0x4
+	ldmgeia sp!, {lr}
+	bxge lr
+	orr r1, r1, #0xc0
+	orr r1, r1, r2, lsl #0x8
+	strh r1, [r0, #0x0]
+	rsb r1, r12, #0x0
+	strh r1, [r0, #0x4]
+	add sp, sp, #0x4
+	ldmia sp!, {lr}
+	bx lr
+
+	arm_func_start G2x_SetBlendBrightness_
+G2x_SetBlendBrightness_: ; 0x020C74B8
+	cmp r2, #0x0
+	orrlt r1, r1, #0xc0
+	strlth r1, [r0, #0x0]
+	rsblt r1, r2, #0x0
+	strlth r1, [r0, #0x4]
+	orrge r1, r1, #0x80
+	strgeh r1, [r0, #0x0]
+	strgeh r2, [r0, #0x4]
+	bx lr
+
+	arm_func_start G2x_SetBlendAlpha_
+G2x_SetBlendAlpha_: ; 0x020C74DC
+	ldr r12, [sp, #0x0]
+	orr r1, r1, #0x40
+	orr r2, r1, r2, lsl #0x8
+	orr r1, r3, r12, lsl #0x8
+	orr r1, r2, r1, lsl #0x10
+	str r1, [r0, #0x0]
+	bx lr
+
+	arm_func_start G2x_SetBGyAffine_
+G2x_SetBGyAffine_: ; 0x020C74F8
+	stmdb sp!, {r4-r6,lr}
+	ldr r5, [r1, #0x0]
+	ldr r4, [r1, #0x4]
+	mov r12, r5, lsl #0xc
+	mov lr, r4, lsl #0xc
+	mov r5, r12, asr #0x10
+	mov r4, lr, asr #0x10
+	mov r12, r5, lsl #0x10
+	mov lr, r4, lsl #0x10
+	mov r5, r12, lsr #0x10
+	mov r4, lr, lsr #0x10
+	orr r4, r5, r4, lsl #0x10
+	str r4, [r0, #0x0]
+	ldr r5, [r1, #0x8]
+	ldr r4, [r1, #0xc]
+	mov r12, r5, lsl #0xc
+	mov lr, r4, lsl #0xc
+	mov r5, r12, asr #0x10
+	mov r4, lr, asr #0x10
+	mov r12, r5, lsl #0x10
+	mov lr, r4, lsl #0x10
+	ldr r4, [sp, #0x14]
+	ldr r6, [sp, #0x10]
+	mov r12, r12, lsr #0x10
+	mov r5, lr, lsr #0x10
+	orr r5, r12, r5, lsl #0x10
+	str r5, [r0, #0x4]
+	ldr r12, [r1, #0x4]
+	sub r5, r4, r3
+	ldr r4, [r1, #0xc]
+	mul lr, r12, r5
+	mul r5, r4, r5
+	ldr r12, [r1, #0x0]
+	sub r6, r6, r2
+	ldr r4, [r1, #0x8]
+	mla r1, r12, r6, lr
+	mla r5, r4, r6, r5
+	add r1, r1, r2, lsl #0xc
+	add r2, r5, r3, lsl #0xc
+	mov r1, r1, asr #0x4
+	str r1, [r0, #0x8]
+	mov r1, r2, asr #0x4
+	str r1, [r0, #0xc]
+	ldmia sp!, {r4-r6,lr}
+	bx lr