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| author | Jens Arnold <amiconn@rockbox.org> | 2005-08-01 01:23:04 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2005-08-01 01:23:04 +0000 |
| commit | 6b749c5ab1b0d75ccc65132f627a1230ffcdc21f (patch) | |
| tree | fd9aff4f30daf07fe5f102f14cd2fcc2fae8213d /apps/plugins | |
| parent | e7bd73f5dc83703e97f32c564ffa1e1a52b01e8c (diff) | |
| download | rockbox-6b749c5ab1b0d75ccc65132f627a1230ffcdc21f.zip rockbox-6b749c5ab1b0d75ccc65132f627a1230ffcdc21f.tar.gz rockbox-6b749c5ab1b0d75ccc65132f627a1230ffcdc21f.tar.bz2 rockbox-6b749c5ab1b0d75ccc65132f627a1230ffcdc21f.tar.xz | |
Further optimised asm 64 bit multiplication for SH1, speedup around 20%.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7274 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins')
| -rw-r--r-- | apps/plugins/mandelbrot.c | 90 |
1 files changed, 41 insertions, 49 deletions
diff --git a/apps/plugins/mandelbrot.c b/apps/plugins/mandelbrot.c index 8474969..3639431 100644 --- a/apps/plugins/mandelbrot.c +++ b/apps/plugins/mandelbrot.c @@ -75,66 +75,58 @@ static unsigned max_iter; static unsigned char *gbuf; static unsigned int gbuf_size = 0; -static unsigned char graybuffer[LCD_HEIGHT]; +static unsigned char graybuffer[LCD_HEIGHT]; #if CONFIG_CPU == SH7034 long long mul64(long long f1, long long f2); asm ( /* 64bit * 64bit -> 64bit multiplication. Works for both signed and unsigned */ - ".global _mul64 \n" - ".type _mul64,@function\n" -"_mul64: \n" /* Notation: abcd * efgh, where each letter */ - "mov.l r8,@-r15 \n" /* represents 16 bits. Called with: */ - "mov.l r9,@-r15 \n" /* r4 = ab, r5 = cd, r6 = ef, r7 = gh */ - - "swap.w r5,r2 \n" /* r2 = dc */ - "mulu r2,r7 \n" /* c * h */ - "swap.w r7,r3 \n" /* r3 = hg */ - "sts macl,r1 \n" /* r1 = c * h */ - "mulu r5,r3 \n" /* d * g */ - "clrt \n" - "sts macl,r9 \n" /* r9 = d * g */ - "addc r9,r1 \n" /* r1 += r9 */ - "movt r0 \n" /* move carry to r0 */ - "mov r1,r9 \n" /* r0r1 <<= 16 */ - "xtrct r0,r9 \n" - "mulu r5,r7 \n" /* d * h */ - "mov r9,r0 \n" - "shll16 r1 \n" - "sts macl,r9 \n" /* r9 = d * h */ - "mov #0,r8 \n" /* r8 = 0 */ - "clrt \n" /* r0r1 += r8r9 */ - "mulu r4,r7 \n" /* b * h */ - "addc r9,r1 \n" - "addc r8,r0 \n" - "sts macl,r8 \n" /* r8 = b * h */ - "mulu r2,r3 \n" /* c * g */ - "add r8,r0 \n" /* r0r1 += r8 << 32 */ - "sts macl,r8 \n" /* r8 = c * g */ - "mulu r5,r6 \n" /* d * f */ - "add r8,r0 \n" /* r0r1 += r8 << 32 */ - "sts macl,r8 \n" /* r8 = d * f */ - "mulu r4,r3 \n" /* b * g */ - "add r8,r0 \n" /* r0r1 += r8 << 32 */ - "sts macl,r8 \n" /* r8 = b * g */ - "mulu r2,r6 \n" /* c * f */ + ".global _mul64 \n" /* Notation: abcd * efgh, where each letter */ + ".type _mul64,@function\n" /* represents 16 bits. Called with: */ +"_mul64: \n" /* r4 = ab, r5 = cd, r6 = ef, r7 = gh */ "swap.w r4,r2 \n" /* r2 = ba */ - "sts macl,r9 \n" /* r9 = c * f */ "mulu r2,r7 \n" /* a * h */ - "add r9,r8 \n" /* r8 += r9 */ "swap.w r6,r3 \n" /* r3 = fe */ - "sts macl,r9 \n" /* r9 = a * h */ + "sts macl,r0 \n" /* r0 = a * h */ "mulu r5,r3 \n" /* d * e */ - "add r9,r8 \n" /* r8 += r9 */ - "sts macl,r9 \n" /* r9 = d * e */ - "add r9,r8 \n" /* r8 += r9 */ - "shll16 r8 \n" /* r8 <<= 16 */ - "add r8,r0 \n" /* r0r1 += r8 << 32 */ - - "mov.l @r15+,r9 \n" + "swap.w r7,r3 \n" /* r3 = hg */ + "sts macl,r1 \n" /* r1 = d * e */ + "mulu r4,r3 \n" /* b * g */ + "add r1,r0 \n" /* r0 += r1 */ + "swap.w r5,r2 \n" /* r2 = dc */ + "sts macl,r1 \n" /* r1 = b * g */ + "mulu r2,r6 \n" /* c * f */ + "add r1,r0 \n" /* r0 += r1 */ + "sts macl,r1 \n" /* r1 = c * f */ + "mulu r4,r7 \n" /* b * h */ + "add r1,r0 \n" /* r0 += r1 */ + "shll16 r0 \n" /* r0 <<= 16 */ + "sts macl,r1 \n" /* r1 = b * h */ + "mulu r2,r3 \n" /* c * g */ + "add r1,r0 \n" /* r0 += r1 */ + "sts macl,r1 \n" /* r1 = c * g */ + "mulu r5,r6 \n" /* d * f */ + "add r1,r0 \n" /* r0 += r1 */ + "sts macl,r1 \n" /* r1 = d * f */ + "mulu r5,r7 \n" /* d * h */ + "add r1,r0 \n" /* r0 += r1 */ + "sts macl,r1 \n" /* r1 = d * h */ + "mulu r2,r7 \n" /* c * h */ + "sts macl,r2 \n" /* r2 = c * h */ + "mulu r5,r3 \n" /* d * g */ + "clrt \n" + "sts macl,r3 \n" /* r3 = d * g */ + "addc r2,r3 \n" /* r3 += r2, carry->r2 */ + "movt r2 \n" + "mov r3,r4 \n" /* r2r3 <<= 16 */ + "xtrct r2,r4 \n" + "mov r4,r2 \n" + "shll16 r3 \n" + "clrt \n" /* r0r1 += r2r3 */ + "addc r3,r1 \n" "rts \n" - "mov.l @r15+,r8 \n" + "addc r2,r0 \n" ); #define MUL64(a, b) mul64(a, b) #else |