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| author | Jens Arnold <amiconn@rockbox.org> | 2008-06-27 16:06:28 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2008-06-27 16:06:28 +0000 |
| commit | 71cc98605fd5d6e3fc5645fd59bfddd094c5e2d1 (patch) | |
| tree | dc804b6fecc4bd77053286f726cf10aa4a6028e4 | |
| parent | 39aaa2f2b5ef1efe7dc8cefdf11877ab10231f88 (diff) | |
| download | rockbox-71cc98605fd5d6e3fc5645fd59bfddd094c5e2d1.tar.gz rockbox-71cc98605fd5d6e3fc5645fd59bfddd094c5e2d1.zip | |
Small optimisation for mandelbrot on arm targets: Help the compiler allocating registers.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17807 a1c6a512-1295-4272-9138-f99709370657
| -rw-r--r-- | apps/plugins/mandelbrot.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/apps/plugins/mandelbrot.c b/apps/plugins/mandelbrot.c index 8b045e74de..793fbdf313 100644 --- a/apps/plugins/mandelbrot.c +++ b/apps/plugins/mandelbrot.c | |||
| @@ -443,11 +443,11 @@ static inline long muls32_asr26(long a, long b) | |||
| 443 | "mov %[r], %[r], lsr #26 \n" | 443 | "mov %[r], %[r], lsr #26 \n" |
| 444 | "orr %[r], %[r], %[t1], lsl #6 \n" | 444 | "orr %[r], %[r], %[t1], lsl #6 \n" |
| 445 | : /* outputs */ | 445 | : /* outputs */ |
| 446 | [r] "=&r"(r), | 446 | [r] "=&r,&r,&r"(r), |
| 447 | [t1]"=&r"(t1) | 447 | [t1]"=&r,&r,&r"(t1) |
| 448 | : /* inputs */ | 448 | : /* inputs */ |
| 449 | [a] "r" (a), | 449 | [a] "%r,%r,%r" (a), |
| 450 | [b] "r" (b) | 450 | [b] "r,0,1" (b) |
| 451 | ); | 451 | ); |
| 452 | return r; | 452 | return r; |
| 453 | } | 453 | } |
| @@ -615,7 +615,7 @@ void calc_mandelbrot_high_prec(void) | |||
| 615 | y2 = MULS32_ASR26(y, y); | 615 | y2 = MULS32_ASR26(y, y); |
| 616 | 616 | ||
| 617 | if (x2 + y2 > (4L<<26)) break; | 617 | if (x2 + y2 > (4L<<26)) break; |
| 618 | 618 | ||
| 619 | y = 2 * MULS32_ASR26(x, y) + b; | 619 | y = 2 * MULS32_ASR26(x, y) + b; |
| 620 | x = x2 - y2 + a; | 620 | x = x2 - y2 + a; |
| 621 | } | 621 | } |