path: root/src/gallium/drivers/llvmpipe/lp_tile_soa.py

#!/usr/bin/env python

'''
/**************************************************************************
 *
 * Copyright 2009 VMware, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

/**
 * @file
 * Pixel format accessor functions.
 *
 * @author Jose Fonseca <jfonseca@vmware.com>
 */
'''


import sys
import os.path

sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), '../../auxiliary/util'))

from u_format_pack import *


def is_format_supported(format):
    '''Determines whether we actually have the plumbing necessary to generate the 
    to read/write to/from this format.'''

    # FIXME: Ideally we would support any format combination here.

    if format.layout != PLAIN:
        return False

    for i in range(4):
        channel = format.channels[i]
        if channel.type not in (VOID, UNSIGNED, SIGNED, FLOAT):
            return False
        if channel.type == FLOAT and channel.size not in (16, 32 ,64):
            return False

    if format.colorspace not in ('rgb', 'srgb'):
        return False

    return True


def generate_format_read(format, dst_channel, dst_native_type, dst_suffix):
    '''Generate the function to read pixels from a particular format'''

    name = format.short_name()

    src_native_type = native_type(format)

    print 'static void'
    print 'lp_tile_%s_swizzle_%s(%s *dst, const uint8_t *src, unsigned src_stride, unsigned x0, unsigned y0)' % (name, dst_suffix, dst_native_type)
    print '{'
    print '   unsigned x, y;'
    print '   const uint8_t *src_row = src + y0*src_stride;'
    print '   for (y = 0; y < TILE_SIZE; ++y) {'
    print '      const %s *src_pixel = (const %s *)(src_row + x0*%u);' % (src_native_type, src_native_type, format.stride())
    print '      for (x = 0; x < TILE_SIZE; ++x) {'

    names = ['']*4
    if format.colorspace in ('rgb', 'srgb'):
        for i in range(4):
            swizzle = format.swizzles[i]
            if swizzle < 4:
                names[swizzle] += 'rgba'[i]
    elif format.colorspace == 'zs':
        swizzle = format.swizzles[0]
        if swizzle < 4:
            names[swizzle] = 'z'
        else:
            assert False
    else:
        assert False

    if format.layout == PLAIN:
        if not format.is_array():
            print '         %s pixel = *src_pixel++;' % src_native_type
            shift = 0;
            for i in range(4):
                src_channel = format.channels[i]
                width = src_channel.size
                if names[i]:
                    value = 'pixel'
                    mask = (1 << width) - 1
                    if shift:
                        value = '(%s >> %u)' % (value, shift)
                    if shift + width < format.block_size():
                        value = '(%s & 0x%x)' % (value, mask)
                    value = conversion_expr(src_channel, dst_channel, dst_native_type, value, clamp=False)
                    print '         %s %s = %s;' % (dst_native_type, names[i], value)
                shift += width
        else:
            for i in range(4):
                if names[i]:
                    print '         %s %s;' % (dst_native_type, names[i])
            for i in range(4):
                src_channel = format.channels[i]
                if names[i]:
                    value = '(*src_pixel++)'
                    value = conversion_expr(src_channel, dst_channel, dst_native_type, value, clamp=False)
                    print '         %s = %s;' % (names[i], value)
                elif src_channel.size:
                    print '         ++src_pixel;'
    else:
        assert False

    for i in range(4):
        if format.colorspace in ('rgb', 'srgb'):
            swizzle = format.swizzles[i]
            if swizzle < 4:
                value = names[swizzle]
            elif swizzle == SWIZZLE_0:
                value = '0'
            elif swizzle == SWIZZLE_1:
                value = get_one(dst_channel)
            else:
                assert False
        elif format.colorspace == 'zs':
            if i < 3:
                value = 'z'
            else:
                value = get_one(dst_channel)
        else:
            assert False
        print '         TILE_PIXEL(dst, x, y, %u) = %s; /* %s */' % (i, value, 'rgba'[i])

    print '      }'
    print '      src_row += src_stride;'
    print '   }'
    print '}'
    print
    

def pack_rgba(format, src_channel, r, g, b, a):
    """Return an expression for packing r, g, b, a into a pixel of the
    given format.  Ex: '(b << 24) | (g << 16) | (r << 8) | (a << 0)'
    """
    assert format.colorspace in ('rgb', 'srgb')
    inv_swizzle = format.inv_swizzles()
    shift = 0
    expr = None
    for i in range(4):
        # choose r, g, b, or a depending on the inverse swizzle term
        if inv_swizzle[i] == 0:
            value = r
        elif inv_swizzle[i] == 1:
            value = g
        elif inv_swizzle[i] == 2:
            value = b
        elif inv_swizzle[i] == 3:
            value = a
        else:
            value = None

        if value:
            dst_channel = format.channels[i]
            dst_native_type = native_type(format)
            value = conversion_expr(src_channel, dst_channel, dst_native_type, value, clamp=False)
            term = "((%s) << %d)" % (value, shift)
            if expr:
                expr = expr + " | " + term
            else:
                expr = term

        width = format.channels[i].size
        shift = shift + width
    return expr


def emit_unrolled_unswizzle_code(format, src_channel):
    '''Emit code for writing a block based on unrolled loops.
    This is considerably faster than the TILE_PIXEL-based code below.
    '''
    dst_native_type = 'uint%u_t' % format.block_size()
    print '   const unsigned dstpix_stride = dst_stride / %d;' % format.stride()
    print '   %s *dstpix = (%s *) dst;' % (dst_native_type, dst_native_type)
    print '   unsigned int qx, qy, i;'
    print
    print '   for (qy = 0; qy < TILE_SIZE; qy += TILE_VECTOR_HEIGHT) {'
    print '      const unsigned py = y0 + qy;'
    print '      for (qx = 0; qx < TILE_SIZE; qx += TILE_VECTOR_WIDTH) {'
    print '         const unsigned px = x0 + qx;'
    print '         const uint8_t *r = src + 0 * TILE_C_STRIDE;'
    print '         const uint8_t *g = src + 1 * TILE_C_STRIDE;'
    print '         const uint8_t *b = src + 2 * TILE_C_STRIDE;'
    print '         const uint8_t *a = src + 3 * TILE_C_STRIDE;'
    print '         (void) r; (void) g; (void) b; (void) a; /* silence warnings */'
    print '         for (i = 0; i < TILE_C_STRIDE; i += 2) {'
    print '            const uint32_t pixel0 = %s;' % pack_rgba(format, src_channel, "r[i+0]", "g[i+0]", "b[i+0]", "a[i+0]")
    print '            const uint32_t pixel1 = %s;' % pack_rgba(format, src_channel, "r[i+1]", "g[i+1]", "b[i+1]", "a[i+1]")
    print '            const unsigned offset = (py + tile_y_offset[i]) * dstpix_stride + (px + tile_x_offset[i]);'
    print '            dstpix[offset + 0] = pixel0;'
    print '            dstpix[offset + 1] = pixel1;'
    print '         }'
    print '         src += TILE_X_STRIDE;'
    print '      }'
    print '   }'


def emit_tile_pixel_unswizzle_code(format, src_channel):
    '''Emit code for writing a block based on the TILE_PIXEL macro.'''
    dst_native_type = native_type(format)

    inv_swizzle = format.inv_swizzles()

    print '   unsigned x, y;'
    print '   uint8_t *dst_row = dst + y0*dst_stride;'
    print '   for (y = 0; y < TILE_SIZE; ++y) {'
    print '      %s *dst_pixel = (%s *)(dst_row + x0*%u);' % (dst_native_type, dst_native_type, format.stride())
    print '      for (x = 0; x < TILE_SIZE; ++x) {'

    if format.layout == PLAIN:
        if not format.is_array():
            print '         %s pixel = 0;' % dst_native_type
            shift = 0;
            for i in range(4):
                dst_channel = format.channels[i]
                width = dst_channel.size
                if inv_swizzle[i] is not None:
                    value = 'TILE_PIXEL(src, x, y, %u)' % inv_swizzle[i]
                    value = conversion_expr(src_channel, dst_channel, dst_native_type, value, clamp=False)
                    if shift:
                        value = '(%s << %u)' % (value, shift)
                    print '         pixel |= %s;' % value
                shift += width
            print '         *dst_pixel++ = pixel;'
        else:
            for i in range(4):
                dst_channel = format.channels[i]
                if inv_swizzle[i] is not None:
                    value = 'TILE_PIXEL(src, x, y, %u)' % inv_swizzle[i]
                    value = conversion_expr(src_channel, dst_channel, dst_native_type, value, clamp=False)
                    print '         *dst_pixel++ = %s;' % value
                elif dst_channel.size:
                    print '         ++dst_pixel;'
    else:
        assert False

    print '      }'
    print '      dst_row += dst_stride;'
    print '   }'


def generate_format_write(format, src_channel, src_native_type, src_suffix):
    '''Generate the function to write pixels to a particular format'''

    name = format.short_name()

    print 'static void'
    print 'lp_tile_%s_unswizzle_%s(const %s *src, uint8_t *dst, unsigned dst_stride, unsigned x0, unsigned y0)' % (name, src_suffix, src_native_type)
    print '{'
    if format.layout == PLAIN \
        and format.colorspace == 'rgb' \
        and format.block_size() <= 32 \
        and format.is_pot() \
        and not format.is_mixed() \
        and (format.channels[0].type == UNSIGNED \
             or format.channels[1].type == UNSIGNED):
        emit_unrolled_unswizzle_code(format, src_channel)
    else:
        emit_tile_pixel_unswizzle_code(format, src_channel)
    print '}'
    print
    

def generate_ssse3():
    print '''
#if defined(PIPE_ARCH_SSE)


#if defined(PIPE_ARCH_SSSE3)

#include <tmmintrin.h>

#else

#include <emmintrin.h>

/**
 * Describe _mm_shuffle_epi8() with gcc extended inline assembly, for cases
 * where -mssse3 is not supported/enabled.
 *
 * MSVC will never get in here as its intrinsics support do not rely on
 * compiler command line options.
 */
static __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_shuffle_epi8(__m128i a, __m128i mask)
{
    __m128i result;
    __asm__("pshufb %1, %0"
            : "=x" (result)
            : "xm" (mask), "0" (a));
    return result;
}

#endif


static void
lp_tile_b8g8r8a8_unorm_swizzle_4ub_ssse3(uint8_t *dst,
                                         const uint8_t *src, unsigned src_stride,
                                         unsigned x0, unsigned y0)
{

   unsigned x, y;
   __m128i *pdst = (__m128i*) dst;
   const uint8_t *ysrc0 = src + y0*src_stride + x0*sizeof(uint32_t);
   unsigned int tile_stridex = src_stride*(TILE_VECTOR_HEIGHT - 1) - sizeof(uint32_t)*TILE_VECTOR_WIDTH;
   unsigned int tile_stridey = src_stride*TILE_VECTOR_HEIGHT;

   const __m128i shuffle00 = _mm_setr_epi8(0x02,0x06,0xff,0xff,0x0a,0x0e,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);
   const __m128i shuffle01 = _mm_setr_epi8(0x01,0x05,0xff,0xff,0x09,0x0d,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);
   const __m128i shuffle02 = _mm_setr_epi8(0x00,0x04,0xff,0xff,0x08,0x0c,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);
   const __m128i shuffle03 = _mm_setr_epi8(0x03,0x07,0xff,0xff,0x0b,0x0f,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);

   const __m128i shuffle10 = _mm_setr_epi8(0xff,0xff,0x02,0x06,0xff,0xff,0x0a,0x0e,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);
   const __m128i shuffle11 = _mm_setr_epi8(0xff,0xff,0x01,0x05,0xff,0xff,0x09,0x0d,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);
   const __m128i shuffle12 = _mm_setr_epi8(0xff,0xff,0x00,0x04,0xff,0xff,0x08,0x0c,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);
   const __m128i shuffle13 = _mm_setr_epi8(0xff,0xff,0x03,0x07,0xff,0xff,0x0b,0x0f,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff);

   const __m128i shuffle20 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x02,0x06,0xff,0xff,0x0a,0x0e,0xff,0xff);
   const __m128i shuffle21 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x01,0x05,0xff,0xff,0x09,0x0d,0xff,0xff);
   const __m128i shuffle22 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00,0x04,0xff,0xff,0x08,0x0c,0xff,0xff);
   const __m128i shuffle23 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x03,0x07,0xff,0xff,0x0b,0x0f,0xff,0xff);

   const __m128i shuffle30 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x02,0x06,0xff,0xff,0x0a,0x0e);
   const __m128i shuffle31 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x01,0x05,0xff,0xff,0x09,0x0d);
   const __m128i shuffle32 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00,0x04,0xff,0xff,0x08,0x0c);
   const __m128i shuffle33 = _mm_setr_epi8(0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x03,0x07,0xff,0xff,0x0b,0x0f);

   for (y = 0; y < TILE_SIZE; y += TILE_VECTOR_HEIGHT) {
      __m128i line0 = *(__m128i*)ysrc0;
      const uint8_t *ysrc = ysrc0 + src_stride;
      ysrc0 += tile_stridey;

      for (x = 0; x < TILE_SIZE; x += TILE_VECTOR_WIDTH) {
         __m128i r, g, b, a, line1;
         line1 = *(__m128i*)ysrc;
         PIPE_READ_WRITE_BARRIER();
         ysrc += src_stride;
         r = _mm_shuffle_epi8(line0, shuffle00);
         g = _mm_shuffle_epi8(line0, shuffle01);
         b = _mm_shuffle_epi8(line0, shuffle02);
         a = _mm_shuffle_epi8(line0, shuffle03);

         line0 = *(__m128i*)ysrc;
         PIPE_READ_WRITE_BARRIER();
         ysrc += src_stride;
         r = _mm_or_si128(r, _mm_shuffle_epi8(line1, shuffle10));
         g = _mm_or_si128(g, _mm_shuffle_epi8(line1, shuffle11));
         b = _mm_or_si128(b, _mm_shuffle_epi8(line1, shuffle12));
         a = _mm_or_si128(a, _mm_shuffle_epi8(line1, shuffle13));

         line1 = *(__m128i*)ysrc;
         PIPE_READ_WRITE_BARRIER();
         ysrc -= tile_stridex;
         r = _mm_or_si128(r, _mm_shuffle_epi8(line0, shuffle20));
         g = _mm_or_si128(g, _mm_shuffle_epi8(line0, shuffle21));
         b = _mm_or_si128(b, _mm_shuffle_epi8(line0, shuffle22));
         a = _mm_or_si128(a, _mm_shuffle_epi8(line0, shuffle23));

         if (x + 1 < TILE_SIZE) {
            line0 = *(__m128i*)ysrc;
            ysrc += src_stride;
         }

         PIPE_READ_WRITE_BARRIER();
         r = _mm_or_si128(r, _mm_shuffle_epi8(line1, shuffle30));
         g = _mm_or_si128(g, _mm_shuffle_epi8(line1, shuffle31));
         b = _mm_or_si128(b, _mm_shuffle_epi8(line1, shuffle32));
         a = _mm_or_si128(a, _mm_shuffle_epi8(line1, shuffle33));

         *pdst++ = r;
         *pdst++ = g;
         *pdst++ = b;
         *pdst++ = a;
      }
   }

}

static void
lp_tile_b8g8r8a8_unorm_unswizzle_4ub_ssse3(const uint8_t *src,
                                          uint8_t *dst, unsigned dst_stride,
                                          unsigned x0, unsigned y0)
{
   unsigned int x, y;
   const __m128i *psrc = (__m128i*) src;
   const __m128i *end = (__m128i*) (src + (y0 + TILE_SIZE - 1)*dst_stride + (x0 + TILE_SIZE - 1)*sizeof(uint32_t));
   uint8_t *pdst = dst + y0 * dst_stride + x0 * sizeof(uint32_t);
   __m128i c0 = *psrc++;
   __m128i c1;

   const __m128i shuffle00 = _mm_setr_epi8(0xff,0xff,0x00,0xff,0xff,0xff,0x01,0xff,0xff,0xff,0x04,0xff,0xff,0xff,0x05,0xff);
   const __m128i shuffle01 = _mm_setr_epi8(0xff,0xff,0x02,0xff,0xff,0xff,0x03,0xff,0xff,0xff,0x06,0xff,0xff,0xff,0x07,0xff);
   const __m128i shuffle02 = _mm_setr_epi8(0xff,0xff,0x08,0xff,0xff,0xff,0x09,0xff,0xff,0xff,0x0c,0xff,0xff,0xff,0x0d,0xff);
   const __m128i shuffle03 = _mm_setr_epi8(0xff,0xff,0x0a,0xff,0xff,0xff,0x0b,0xff,0xff,0xff,0x0e,0xff,0xff,0xff,0x0f,0xff);

   const __m128i shuffle10 = _mm_setr_epi8(0xff,0x00,0xff,0xff,0xff,0x01,0xff,0xff,0xff,0x04,0xff,0xff,0xff,0x05,0xff,0xff);
   const __m128i shuffle11 = _mm_setr_epi8(0xff,0x02,0xff,0xff,0xff,0x03,0xff,0xff,0xff,0x06,0xff,0xff,0xff,0x07,0xff,0xff);
   const __m128i shuffle12 = _mm_setr_epi8(0xff,0x08,0xff,0xff,0xff,0x09,0xff,0xff,0xff,0x0c,0xff,0xff,0xff,0x0d,0xff,0xff);
   const __m128i shuffle13 = _mm_setr_epi8(0xff,0x0a,0xff,0xff,0xff,0x0b,0xff,0xff,0xff,0x0e,0xff,0xff,0xff,0x0f,0xff,0xff);

   const __m128i shuffle20 = _mm_setr_epi8(0x00,0xff,0xff,0xff,0x01,0xff,0xff,0xff,0x04,0xff,0xff,0xff,0x05,0xff,0xff,0xff);
   const __m128i shuffle21 = _mm_setr_epi8(0x02,0xff,0xff,0xff,0x03,0xff,0xff,0xff,0x06,0xff,0xff,0xff,0x07,0xff,0xff,0xff);
   const __m128i shuffle22 = _mm_setr_epi8(0x08,0xff,0xff,0xff,0x09,0xff,0xff,0xff,0x0c,0xff,0xff,0xff,0x0d,0xff,0xff,0xff);
   const __m128i shuffle23 = _mm_setr_epi8(0x0a,0xff,0xff,0xff,0x0b,0xff,0xff,0xff,0x0e,0xff,0xff,0xff,0x0f,0xff,0xff,0xff);

   const __m128i shuffle30 = _mm_setr_epi8(0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x01,0xff,0xff,0xff,0x04,0xff,0xff,0xff,0x05);
   const __m128i shuffle31 = _mm_setr_epi8(0xff,0xff,0xff,0x02,0xff,0xff,0xff,0x03,0xff,0xff,0xff,0x06,0xff,0xff,0xff,0x07);
   const __m128i shuffle32 = _mm_setr_epi8(0xff,0xff,0xff,0x08,0xff,0xff,0xff,0x09,0xff,0xff,0xff,0x0c,0xff,0xff,0xff,0x0d);
   const __m128i shuffle33 = _mm_setr_epi8(0xff,0xff,0xff,0x0a,0xff,0xff,0xff,0x0b,0xff,0xff,0xff,0x0e,0xff,0xff,0xff,0x0f);

   for (y = 0; y < TILE_SIZE; y += TILE_VECTOR_HEIGHT) {
      __m128i *tile = (__m128i*) pdst;
      pdst += dst_stride * TILE_VECTOR_HEIGHT;
      for (x = 0; x < TILE_SIZE; x += TILE_VECTOR_WIDTH) {
         uint8_t *linep = (uint8_t*) (tile++);
         __m128i line0, line1, line2, line3;

         c1 = *psrc++; /* r */
         PIPE_READ_WRITE_BARRIER();
         line0 = _mm_shuffle_epi8(c0, shuffle00);
         line1 = _mm_shuffle_epi8(c0, shuffle01);
         line2 = _mm_shuffle_epi8(c0, shuffle02);
         line3 = _mm_shuffle_epi8(c0, shuffle03);

         c0 = *psrc++; /* g */
         PIPE_READ_WRITE_BARRIER();
         line0 = _mm_or_si128(line0, _mm_shuffle_epi8(c1, shuffle10));
         line1 = _mm_or_si128(line1, _mm_shuffle_epi8(c1, shuffle11));
         line2 = _mm_or_si128(line2, _mm_shuffle_epi8(c1, shuffle12));
         line3 = _mm_or_si128(line3, _mm_shuffle_epi8(c1, shuffle13));

         c1 = *psrc++; /* b */
         PIPE_READ_WRITE_BARRIER();
         line0 = _mm_or_si128(line0, _mm_shuffle_epi8(c0, shuffle20));
         line1 = _mm_or_si128(line1, _mm_shuffle_epi8(c0, shuffle21));
         line2 = _mm_or_si128(line2, _mm_shuffle_epi8(c0, shuffle22));
         line3 = _mm_or_si128(line3, _mm_shuffle_epi8(c0, shuffle23));

         if (psrc != end)
                 c0 = *psrc++; /* a */
         PIPE_READ_WRITE_BARRIER();
         line0 = _mm_or_si128(line0, _mm_shuffle_epi8(c1, shuffle30));
         line1 = _mm_or_si128(line1, _mm_shuffle_epi8(c1, shuffle31));
         line2 = _mm_or_si128(line2, _mm_shuffle_epi8(c1, shuffle32));
         line3 = _mm_or_si128(line3, _mm_shuffle_epi8(c1, shuffle33));

         *(__m128i*) (linep) = line0;
         *(__m128i*) (((char*)linep) + dst_stride) = line1;
         *(__m128i*) (((char*)linep) + 2 * dst_stride) = line2;
         *(__m128i*) (((char*)linep) + 3 * dst_stride) = line3;
      }
   }
}

#endif /* PIPE_ARCH_SSSE3 */
'''


def generate_swizzle(formats, dst_channel, dst_native_type, dst_suffix):
    '''Generate the dispatch function to read pixels from any format'''

    for format in formats:
        if is_format_supported(format):
            generate_format_read(format, dst_channel, dst_native_type, dst_suffix)

    print 'void'
    print 'lp_tile_swizzle_%s(enum pipe_format format, %s *dst, const void *src, unsigned src_stride, unsigned x, unsigned y)' % (dst_suffix, dst_native_type)
    print '{'
    print '   void (*func)(%s *dst, const uint8_t *src, unsigned src_stride, unsigned x0, unsigned y0);' % dst_native_type
    print '#ifdef DEBUG'
    print '   lp_tile_swizzle_count += 1;'
    print '#endif'
    print '   switch(format) {'
    for format in formats:
        if is_format_supported(format):
            print '   case %s:' % format.name
            func_name = 'lp_tile_%s_swizzle_%s' % (format.short_name(), dst_suffix)
            if format.name == 'PIPE_FORMAT_B8G8R8A8_UNORM':
                print '#ifdef PIPE_ARCH_SSE'
                print '      func = util_cpu_caps.has_ssse3 ? %s_ssse3 : %s;' % (func_name, func_name)
                print '#else'
                print '      func = %s;' % (func_name,)
                print '#endif'
            else:
                print '      func = %s;' % (func_name,)
            print '      break;'
    print '   default:'
    print '      debug_printf("%s: unsupported format %s\\n", __FUNCTION__, util_format_name(format));'
    print '      return;'
    print '   }'
    print '   func(dst, (const uint8_t *)src, src_stride, x, y);'
    print '}'
    print


def generate_unswizzle(formats, src_channel, src_native_type, src_suffix):
    '''Generate the dispatch function to write pixels to any format'''

    for format in formats:
        if is_format_supported(format):
            generate_format_write(format, src_channel, src_native_type, src_suffix)

    print 'void'
    print 'lp_tile_unswizzle_%s(enum pipe_format format, const %s *src, void *dst, unsigned dst_stride, unsigned x, unsigned y)' % (src_suffix, src_native_type)
    
    print '{'
    print '   void (*func)(const %s *src, uint8_t *dst, unsigned dst_stride, unsigned x0, unsigned y0);' % src_native_type
    print '#ifdef DEBUG'
    print '   lp_tile_unswizzle_count += 1;'
    print '#endif'
    print '   switch(format) {'
    for format in formats:
        if is_format_supported(format):
            print '   case %s:' % format.name
            func_name = 'lp_tile_%s_unswizzle_%s' % (format.short_name(), src_suffix)
            if format.name == 'PIPE_FORMAT_B8G8R8A8_UNORM':
                print '#ifdef PIPE_ARCH_SSE'
                print '      func = util_cpu_caps.has_ssse3 ? %s_ssse3 : %s;' % (func_name, func_name)
                print '#else'
                print '      func = %s;' % (func_name,)
                print '#endif'
            else:
                print '      func = %s;' % (func_name,)
            print '      break;'
    print '   default:'
    print '      debug_printf("%s: unsupported format %s\\n", __FUNCTION__, util_format_name(format));'
    print '      return;'
    print '   }'
    print '   func(src, (uint8_t *)dst, dst_stride, x, y);'
    print '}'
    print


def main():
    formats = []
    for arg in sys.argv[1:]:
        formats.extend(parse(arg))

    print '/* This file is autogenerated by lp_tile_soa.py from u_format.csv. Do not edit directly. */'
    print
    # This will print the copyright message on the top of this file
    print __doc__.strip()
    print
    print '#include "pipe/p_compiler.h"'
    print '#include "util/u_format.h"'
    print '#include "util/u_math.h"'
    print '#include "util/u_half.h"'
    print '#include "util/u_cpu_detect.h"'
    print '#include "lp_tile_soa.h"'
    print
    print '#ifdef DEBUG'
    print 'unsigned lp_tile_unswizzle_count = 0;'
    print 'unsigned lp_tile_swizzle_count = 0;'
    print '#endif'
    print
    print 'const unsigned char'
    print 'tile_offset[TILE_VECTOR_HEIGHT][TILE_VECTOR_WIDTH] = {'
    print '   {  0,  1,  4,  5},'
    print '   {  2,  3,  6,  7},'
    print '   {  8,  9, 12, 13},'
    print '   { 10, 11, 14, 15}'
    print '};'
    print
    print '/* Note: these lookup tables could be replaced with some'
    print ' * bit-twiddling code, but this is a little faster.'
    print ' */'
    print 'static unsigned tile_x_offset[TILE_VECTOR_WIDTH * TILE_VECTOR_HEIGHT] = {'
    print '   0, 1, 0, 1, 2, 3, 2, 3,'
    print '   0, 1, 0, 1, 2, 3, 2, 3'
    print '};'
    print
    print 'static unsigned tile_y_offset[TILE_VECTOR_WIDTH * TILE_VECTOR_HEIGHT] = {'
    print '   0, 0, 1, 1, 0, 0, 1, 1,'
    print '   2, 2, 3, 3, 2, 2, 3, 3'
    print '};'
    print

    generate_ssse3()

    channel = Channel(UNSIGNED, True, 8)
    native_type = 'uint8_t'
    suffix = '4ub'

    generate_swizzle(formats, channel, native_type, suffix)
    generate_unswizzle(formats, channel, native_type, suffix)


if __name__ == '__main__':
    main()