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6 * Redistribution and use in source and binary forms, with or without
10 * notice, and the entire permission notice in its entirety,
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
22 * necessary due to a potential bad interaction between the GPL and
41 * Here are lots of conversion and normalization functions mainly
44 * these are handled first and exit as fast as possible, this is
47 * The register usage is optimized for fp_scan.S and which register
49 * something here. %d0 and %d1 is always usable, sometimes %d2 (or
87 * normalizes the number and is always called after the other
147 | zeros and denormalized
154 | infinities and NAN
192 | zeros and denormalized
199 | infinities and NAN
267 | zeros and subnormals:
306 and.w #0x1f,%d2
355 bfins %d0,(%a0){%d1,#32} | higher and lower lword
394 lsl.l %d2,%d0 | higher and lower lword
402 | Infinities and NaNs
424 * FP operators, and before any conversion into the destination
435 | NOTE: it does _not_ modify %a0/%a1 and the upper word of %d2
491 | Zeros and subnormal numbers
531 and.w #0x1f,%d2
581 bfins %d0,(%a0){%d1,#32} | higher and lower lword
619 | Infinities and NaNs, again, same as above.
650 | called (and extended argument is already normalized
652 | rounding precision is selected and before converting
689 and.w #0xf800,(2,%a0) | clear bits 0-10
714 | reset the high bit, and increment the exponent.
737 | Exponent underflow. Try to make a denormal, and set it to
763 | Another 64-bit single shift and store
787 | zero and denormalized
813 and.w (6,%a0),%d0
902 | is now zero. We will set the mantissa to reflect this, and
923 | Exponent underflow. Try to make a denormal, and set it to
981 | zero and denormalized
1062 | is now zero. We will set the mantissa to reflect this, and
1249 | and made the number nonsignaling
1368 | status byte and condition code bytes of fp_sr here, so that
1385 | infinitiv and NAN
1396 | Here, we test things in the exception status byte, and set
1408 and.b #0x08,%d1
1415 and.b %d1,%d0
1418 and.b #0x80,%d1
1420 and.b #0xf8,%d0
1424 and.b (FPD_FPCR+2,FPDATA),%d0