Function lcd_words

core/lcd.c:223–296

}

static uint32_t lcd_words(uint8_t words) {
    assert(words > 0);
    uint32_t ticks = 0;
    if (likely(lcd.control >> 11 & 1)) {
        uint32_t bgr = lcd.BGR ? 0x001F001F : 0;
        uint32_t *dat = &lcd.fifo[lcd.pos / sizeof(uint32_t)];
        switch (lcd.LCDBPP) {
            case 4: {
                uint_fast8_t bi = lcd.BEBO ? 16 : 0;
                do {
                    uint32_t word = rotr32(lcd_next_word(&dat), bi);
                    word = lcd_bgr565swap(c1555(word), bgr);
                    ticks = lcd_process_pixel(ticks, word);
                    ticks = lcd_process_pixel(ticks, word >> 16);
                } while (--words);
                break;
            }

            case 5:
                do {
                    uint32_t word = lcd_next_word(&dat);
                    word = lcd_bgr565swap(c888(word), bgr);
                    ticks = lcd_process_pixel(ticks, word);
                } while (--words);
                break;

            case 6: {
                uint_fast8_t bi = lcd.BEBO ? 16 : 0;
                do {
                    uint32_t word = rotr32(lcd_next_word(&dat), bi);
                    word = lcd_bgr565swap(word, bgr);
                    ticks = lcd_process_pixel(ticks, word);
                    ticks = lcd_process_pixel(ticks, word >> 16);
                } while (--words);
                break;
            }

            case 7: {
                uint_fast8_t bi = lcd.BEBO ? 16 : 0;
                do {
                    uint32_t word = rotr32(lcd_next_word(&dat), bi);
                    word = lcd_bgr565swap(c444(word), bgr);
                    ticks = lcd_process_pixel(ticks, word);
                    ticks = lcd_process_pixel(ticks, word >> 16);
                } while (--words);
                break;
            }

            default: {
                uint_fast8_t bpp = 1 << lcd.LCDBPP;
                uint_fast8_t mask = (1 << bpp) - 1;
                uint_fast8_t bi = (lcd.BEBO ^ (CEMU_BYTE_ORDER == CEMU_BIG_ENDIAN) ? 0 : 24) ^ (lcd.BEPO ? 0 : 8 - bpp);
                do {
                    uint_fast8_t bitpos = 32;
                    uint32_t word = *dat++;
                    do {
                        uint32_t pixel = lcd.palette[word >> ((bitpos -= bpp) ^ bi) & mask];
                        pixel |= (uint32_t)lcd.palette[word >> ((bitpos -= bpp) ^ bi) & mask] << 16;