[Pixman] [PATCH 03/12] vmx: implement fast path vmx_fill

[Oded Gabbay]

Based on sse2 impl.

Tested cairo trimmed benchmarks on POWER8, 8 cores, 3.4GHz,
RHEL 7.1 ppc64le :

speedups
========
     t-swfdec-giant-steps  1382.86 ->  719.65  :  1.92x speedup
   t-gnome-system-monitor  1405.45 ->  923.71  :  1.52x speedup
              t-evolution  550.91  ->  410.73  :  1.34x speedup
      t-firefox-paintball  800.47  ->  661.47  :  1.21x speedup
t-firefox-canvas-swscroll  1419.22 ->  1209.98 :  1.17x speedup
      t-xfce4-terminal-a1  1537.75 ->  1319.23 :  1.17x speedup
          t-midori-zoomed  693.34  ->  607.99  :  1.14x speedup
      t-firefox-scrolling  1306.05 ->  1149.77 :  1.14x speedup
          t-chromium-tabs  210.72  ->  191.17  :  1.10x speedup
   t-firefox-planet-gnome  980.11  ->  913.88  :  1.07x speedup

Signed-off-by: Oded Gabbay <oded.gabbay at gmail.com>
---
 pixman/pixman-vmx.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)

diff --git a/pixman/pixman-vmx.c b/pixman/pixman-vmx.c
index b81cb45..b9acd6c 100644
--- a/pixman/pixman-vmx.c
+++ b/pixman/pixman-vmx.c
@@ -2557,6 +2557,157 @@ vmx_combine_add_ca (pixman_implementation_t *imp,
     }
 }
 
+static pixman_bool_t
+vmx_fill (pixman_implementation_t *imp,
+           uint32_t *               bits,
+           int                      stride,
+           int                      bpp,
+           int                      x,
+           int                      y,
+           int                      width,
+           int                      height,
+           uint32_t		    filler)
+{
+    uint32_t byte_width;
+    uint8_t *byte_line;
+
+    vector unsigned int vfiller;
+
+    if (bpp == 8)
+    {
+	uint8_t b;
+	uint16_t w;
+
+	stride = stride * (int) sizeof (uint32_t) / 1;
+	byte_line = (uint8_t *)(((uint8_t *)bits) + stride * y + x);
+	byte_width = width;
+	stride *= 1;
+
+	b = filler & 0xff;
+	w = (b << 8) | b;
+	filler = (w << 16) | w;
+    }
+    else if (bpp == 16)
+    {
+	stride = stride * (int) sizeof (uint32_t) / 2;
+	byte_line = (uint8_t *)(((uint16_t *)bits) + stride * y + x);
+	byte_width = 2 * width;
+	stride *= 2;
+
+        filler = (filler & 0xffff) * 0x00010001;
+    }
+    else if (bpp == 32)
+    {
+	stride = stride * (int) sizeof (uint32_t) / 4;
+	byte_line = (uint8_t *)(((uint32_t *)bits) + stride * y + x);
+	byte_width = 4 * width;
+	stride *= 4;
+    }
+    else
+    {
+	return FALSE;
+    }
+
+    vfiller = create_mask_1x32_128(&filler);
+
+    while (height--)
+    {
+	int w;
+	uint8_t *d = byte_line;
+	byte_line += stride;
+	w = byte_width;
+
+	if (w >= 1 && ((uintptr_t)d & 1))
+	{
+	    *(uint8_t *)d = filler;
+	    w -= 1;
+	    d += 1;
+	}
+
+	while (w >= 2 && ((uintptr_t)d & 3))
+	{
+	    *(uint16_t *)d = filler;
+	    w -= 2;
+	    d += 2;
+	}
+
+	while (w >= 4 && ((uintptr_t)d & 15))
+	{
+	    *(uint32_t *)d = filler;
+
+	    w -= 4;
+	    d += 4;
+	}
+
+	while (w >= 128)
+	{
+	    vec_st(vfiller, 0, (uint32_t *) d);
+	    vec_st(vfiller, 0, (uint32_t *) d + 4);
+	    vec_st(vfiller, 0, (uint32_t *) d + 8);
+	    vec_st(vfiller, 0, (uint32_t *) d + 12);
+	    vec_st(vfiller, 0, (uint32_t *) d + 16);
+	    vec_st(vfiller, 0, (uint32_t *) d + 20);
+	    vec_st(vfiller, 0, (uint32_t *) d + 24);
+	    vec_st(vfiller, 0, (uint32_t *) d + 28);
+
+	    d += 128;
+	    w -= 128;
+	}
+
+	if (w >= 64)
+	{
+	    vec_st(vfiller, 0, (uint32_t *) d);
+	    vec_st(vfiller, 0, (uint32_t *) d + 4);
+	    vec_st(vfiller, 0, (uint32_t *) d + 8);
+	    vec_st(vfiller, 0, (uint32_t *) d + 12);
+
+	    d += 64;
+	    w -= 64;
+	}
+
+	if (w >= 32)
+	{
+	    vec_st(vfiller, 0, (uint32_t *) d);
+	    vec_st(vfiller, 0, (uint32_t *) d + 4);
+
+	    d += 32;
+	    w -= 32;
+	}
+
+	if (w >= 16)
+	{
+	    vec_st(vfiller, 0, (uint32_t *) d);
+
+	    d += 16;
+	    w -= 16;
+	}
+
+	while (w >= 4)
+	{
+	    *(uint32_t *)d = filler;
+
+	    w -= 4;
+	    d += 4;
+	}
+
+	if (w >= 2)
+	{
+	    *(uint16_t *)d = filler;
+	    w -= 2;
+	    d += 2;
+	}
+
+	if (w >= 1)
+	{
+	    *(uint8_t *)d = filler;
+	    w -= 1;
+	    d += 1;
+	}
+    }
+
+    return TRUE;
+}
+
 static void
 vmx_composite_over_8888_8888 (pixman_implementation_t *imp,
                                pixman_composite_info_t *info)
@@ -2714,5 +2865,7 @@ _pixman_implementation_create_vmx (pixman_implementation_t *fallback)
     imp->combine_32_ca[PIXMAN_OP_XOR] = vmx_combine_xor_ca;
     imp->combine_32_ca[PIXMAN_OP_ADD] = vmx_combine_add_ca;
 
+    imp->fill = vmx_fill;
+
     return imp;
 }
-- 
2.4.3