diff options
Diffstat (limited to 'examples/mandelbrot.hdass')
| -rw-r--r-- | examples/mandelbrot.hdass | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/examples/mandelbrot.hdass b/examples/mandelbrot.hdass index 9054c15..9a1fd45 100644 --- a/examples/mandelbrot.hdass +++ b/examples/mandelbrot.hdass @@ -1,11 +1,6 @@ [entry: main] [enable: logical_registers] -// Renders the Mandelbrot set as ASCII art. The evolving z value is kept in a -// Complex struct on the stack (accessed through its field offsets), while the -// per-pixel constant c stays in xmm2/xmm3. Uses double-precision floats and the -// logical_registers extension (r1..r14 name the general-purpose registers). - const SYS_WRITE = 1 const SYS_EXIT = 60 const STDOUT = 1 @@ -27,7 +22,7 @@ proc main stack z[Complex.size] stack row[W + 1] - r11 = 0 // py + r11 = 0 // py row_loop: // ci = py * 0.08 - 1.2 @@ -37,7 +32,7 @@ row_loop: xmm7 = 1.2 xmm3 -= xmm7 - r12 = 0 // px + r12 = 0 // px col_loop: // cr = px * 0.04375 - 2.5 @@ -51,12 +46,12 @@ col_loop: xmm0 = 0.0 r5 = z r5 += Complex.re - ^r5 = xmm0 // z.re = 0 + ^r5 = xmm0 // z.re = 0 r5 = z r5 += Complex.im - ^r5 = xmm0 // z.im = 0 + ^r5 = xmm0 // z.im = 0 - r2 = 0 // iteration count + r2 = 0 // iteration count iter_loop: // load z into xmm0 (zr) and xmm1 (zi) @@ -79,12 +74,12 @@ iter_loop: if xmm6 > 4.0 goto plot - // new_zi = 2*zr*zi + ci (uses the old zr and zi) + // new_zi = 2*zr*zi + ci xmm6 = xmm0 xmm6 *= xmm1 xmm6 += xmm6 xmm6 += xmm3 - xmm7 = xmm6 // stash new_zi + xmm7 = xmm6 // new_zr = zr2 - zi2 + cr xmm4 -= xmm5 @@ -93,17 +88,17 @@ iter_loop: // store the new z back into the struct r5 = z r5 += Complex.re - ^r5 = xmm4 // z.re = new_zr + ^r5 = xmm4 // z.re = new_zr r5 = z r5 += Complex.im - ^r5 = xmm7 // z.im = new_zi + ^r5 = xmm7 // z.im = new_zi r2 += 1 if r2 < MAX_ITER goto iter_loop plot: - // index = iter * 9 / MAX_ITER, then char = palette[index] + // index = iter * 9 / MAX_ITER r1 = r2 r1 *= 9 r3 = MAX_ITER @@ -121,7 +116,6 @@ plot: if r12 < W goto col_loop - // terminate the row with a newline and write it r6 = row r6 += W r1 = 10 |