Expand the note on the number of TCG ops generated per target insn,
to be clearer about the range of applicability of the 20 op rule
of thumb. Also add a note about the hard MAX_OP_PER_INSTR limit.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Some targets (e.g. Alpha and MIPS64) need to keep 32-bit operands
sign-extended in 64-bit registers (regardless of the "real" sign
of the operand). For that, we need to be able to distinguish
between a 32-bit load with a 32-bit result and a 32-bit load with
a given extension to a 64-bit result. This distinction already
exists for the ld* loads, but not the qemu_ld* loads.
Reserve qemu_ld32u for 64-bit outputs and introduce qemu_ld32 for
32-bit outputs. Adjust all code generators to match.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Defines setcond_{i32,i64} and setcond2_i32 for 64-on-32-bit.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
The internal opcodes brcond2, add2, sub2, mulu2 were undocumented.
Place these in a new section that clearly indicates that they are
not to be emitted by translators.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Thanks to Stuart Brady for the notice.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6920 c046a42c-6fe2-441c-8c8c-71466251a162
The functions defined in tcg/tcg-op.h have no _i32 or _i64 suffix,
qemu_ld64 and qemu_st64 were missing from the list, and there are
no 'plain' qemu_ld/qemu_st ops.
Signed-off-by: Stuart Brady <stuart.brady@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6148 c046a42c-6fe2-441c-8c8c-71466251a162
Updated from previous version to use the tcg prologue/epilogue mechanism, may be slower than direct call.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4500 c046a42c-6fe2-441c-8c8c-71466251a162
Peter Maydell