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sm501: Optimise 1 pixel 2d ops 

Some guests do 1x1 blits which is faster to do directly than calling a
function for it so avoid overhead in this case.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 7cccc302d7b4c5c313bad7681ac4686417143c3e.1592686588.git.balaton@eik.bme.hu
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
BALATON Zoltan 2020-06-20 22:56:28 +02:00 committed by Gerd Hoffmann
parent 299778d5af
commit c208085a3e
1 changed files with 16 additions and 3 deletions
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19
hw/display/sm501.c
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@ -794,6 +794,14 @@ static void sm501_2d_operation(SM501State *s)
src_x == dst_x && src_y == dst_y) {
break;
}
/* Some clients also do 1 pixel blits, avoid overhead for these */
if (width == 1 && height == 1) {
unsigned int si = (src_x + src_y * src_pitch) * bypp;
unsigned int di = (dst_x + dst_y * dst_pitch) * bypp;
stn_he_p(&s->local_mem[dst_base + di], bypp,
ldn_he_p(&s->local_mem[src_base + si], bypp));
break;
}
/* Check for overlaps, this could be made more exact */
uint32_t sb, se, db, de;
sb = src_base + src_x + src_y * (width + src_pitch);
@ -842,9 +850,14 @@ static void sm501_2d_operation(SM501State *s)
color = cpu_to_le16(color);
}
pixman_fill((uint32_t *)&s->local_mem[dst_base],
dst_pitch * bypp / sizeof(uint32_t),
8 * bypp, dst_x, dst_y, width, height, color);
if (width == 1 && height == 1) {
unsigned int i = (dst_x + dst_y * dst_pitch) * bypp;
stn_he_p(&s->local_mem[dst_base + i], bypp, color);
} else {
pixman_fill((uint32_t *)&s->local_mem[dst_base],
dst_pitch * bypp / sizeof(uint32_t),
8 * bypp, dst_x, dst_y, width, height, color);
}
break;
}
default: