Linux crappy FB fill

/*

.macro load reg, x
    mov \reg, #((\x) & 0xFF000000)
    orr \reg, \reg, #((\x) & 0x00FF0000)
    orr \reg, \reg, #((\x) & 0x0000FF00)
    orr \reg, \reg, #((\x) & 0x000000FF)
.endm


    loop1:
        load r0, 0x18000000
        load r1, 400*240*3*2
        load r2, 0xA3B5D2F8
        mov r3, #0
        loop2:
            add r4, r0, r3
            str r2, [r4]
            add r3, r3, #4
            cmp r3, r1
            blt loop2
        b loop1
*/


#define load(reg, x) \
    "mov " # reg ", #((" # x ") & 0xFF000000)\n\t" \
    "orr " # reg ", " # reg ", #((" # x ") & 0x00FF0000)\n\t" \
    "orr " # reg ", " # reg ", #((" # x ") & 0x0000FF00)\n\t" \
    "orr " # reg ", " # reg ", #((" # x ") & 0x000000FF)\n\t"

void __attribute__((naked)) foo(void)
{
    __asm__ volatile(
        "loop1:\n\t"
            load(r0, 0x18000000)
            load(r1, 400*240*3*2)
            load(r2, 0xA3B5D2F9)
            "mov r3, #0\n\t"
            "loop2:\n\t"
                "add r4, r0, r3\n\t"
                "str r2, [r4]\n\t"
                "add r3, r3, #4\n\t"
                "cmp r3, r1\n\t"
                "blt loop2\n\t"
            "b loop1\n\t"
    );
}