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SH1: Better placement of the C library routine references (gcc 3.4.x -Os and -O2 proof).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9748 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2006-04-20 19:48:02 +00:00
parent 29ab31e8f1
commit d43e719d59
2 changed files with 18 additions and 26 deletions
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24
apps/plugins/lib/gray_draw.c
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@ -747,6 +747,14 @@ static void _writearray(unsigned char *address, const unsigned char *src,
"bra .wa_end \n"
"nop \n"
/* References to C library routines used in the precalc block */
".align 2 \n"
".ashlsi3: \n" /* C library routine: */
".long ___ashlsi3 \n" /* shift r4 left by r5, result in r0 */
".lshrsi3: \n" /* C library routine: */
".long ___lshrsi3 \n" /* shift r4 right by r5, result in r0 */
/* both routines preserve r4, destroy r5 and take ~16 cycles */
".wa_sloop: \n" /** short loop (nothing to keep) **/
"shlr r1 \n" /* rotate lsb of pattern 1 to t bit */
"rotcl r0 \n" /* rotate t bit into r0 */
@ -898,7 +906,7 @@ static void _writearray(unsigned char *address, const unsigned char *src,
"bhi.b .wa_floop \n" /* no: loop */
"bra.b .wa_end \n"
".wa_sstart: \n"
"move.l %%a0,%[mask]\n" /* mask isn't needed here, reuse reg */
@ -951,18 +959,6 @@ static void _writearray(unsigned char *address, const unsigned char *src,
#endif
}
#if CONFIG_CPU == SH7034
/* References to C library routines used in _writearray() */
asm (
".align 2 \n"
".ashlsi3: \n" /* C library routine: */
".long ___ashlsi3 \n" /* shift r4 left by r5, return in r0 */
".lshrsi3: \n" /* C library routine: */
".long ___lshrsi3 \n" /* shift r4 right by r5, return in r0 */
/* both routines preserve r4, destroy r5 and take ~16 cycles */
);
#endif
/* Draw a partial greyscale bitmap, canonical format */
void gray_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
int stride, int x, int y, int width, int height)
@ -975,7 +971,7 @@ void gray_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
if ((width <= 0) || (height <= 0) || (x >= _gray_info.width)
|| (y >= _gray_info.height) || (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{