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| author | Richard Henderson <rth@twiddle.net> | 2010-01-12 19:59:33 +0000 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2010-01-12 19:59:33 +0000 |
| commit | 583d121520a81d07bacee7ebe9366d107c8b18b6 (patch) | |
| tree | edaa4e9824a7b3e99886da07c3fe1a6bb0c61b25 /hw/virtio-net.c | |
| parent | 5e143c43a686d5563b3a8c9d46b338967cc8d09c (diff) | |
| download | focaccia-qemu-583d121520a81d07bacee7ebe9366d107c8b18b6.tar.gz focaccia-qemu-583d121520a81d07bacee7ebe9366d107c8b18b6.zip | |
tcg-sparc: Implement division properly.
The {div,divu}2 opcodes are intended for systems for which the
division instruction produces both quotient and remainder. Sparc
is not such a system. Indeed, the remainder must be computed as
quot = a / b
rem = a - (quot * b)
Split out a tcg_out_div32 function that properly initializes Y
with the extension of the input to 64-bits. Discard the code
that used the 64-bit DIVX on sparc9/sparcv8plus without extending
the inputs to 64-bits. Implement remainders in terms of division
followed by multiplication.
Signed-off-by: Richard Henderson <rth@twiddle.net>
[blauwirbel@gmail.com: applied rth's typo fix in tcg_out_div32]
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'hw/virtio-net.c')
0 files changed, 0 insertions, 0 deletions