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| author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-04-08 21:45:42 +0200 |
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| committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-04-08 21:45:42 +0200 |
| commit | 63915fbebe707cc1de7c0ed5a24148cac45a742c (patch) | |
| tree | da503cba224f14281a2ee841930b8843459cb42b /runtime/arm/i64_stof.S | |
| parent | f78d61faf3db94ac1704ce0d11291211b5307629 (diff) | |
| parent | e326ed9f28a2ed6869f0cb356ef9a8e189cb0a47 (diff) | |
| download | compcert-kvx-63915fbebe707cc1de7c0ed5a24148cac45a742c.tar.gz compcert-kvx-63915fbebe707cc1de7c0ed5a24148cac45a742c.zip | |
Merge remote-tracking branch 'origin/mppa-work' into mppa-thread
Diffstat (limited to 'runtime/arm/i64_stof.S')
| -rw-r--r-- | runtime/arm/i64_stof.S | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/runtime/arm/i64_stof.S b/runtime/arm/i64_stof.S index bcfa471c..11e00a2a 100644 --- a/runtime/arm/i64_stof.S +++ b/runtime/arm/i64_stof.S @@ -39,12 +39,11 @@ @@@ Conversion from signed 64-bit integer to single float FUNCTION(__compcert_i64_stof) - @ Check whether -2^53 <= X < 2^53 - ASR r2, Reg0HI, #21 - ASR r3, Reg0HI, #31 @ (r2,r3) = X >> 53 + @ Check whether -2^53 <= X < 2^53 + ASR r2, Reg0HI, #21 @ r2 = high 32 bits of X >> 53 + @ -2^53 <= X < 2^53 iff r2 is -1 or 0, that is, iff r2 + 1 is 0 or 1 adds r2, r2, #1 - adc r3, r3, #0 @ (r2,r3) = X >> 53 + 1 - cmp r3, #2 + cmp r2, #2 blo 1f @ X is large enough that double rounding can occur. @ Avoid it by nudging X away from the points where double rounding |