tcg/arm: fix condition in zero/sign extension functions
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
tcg/arm: remove conditional argument for qemu_ld/st
While it make sense to pass a conditional argument to tcg_out_*()functions as the ARM architecture allows that, it doesn't make sensefor qemu_ld/st functions. These functions use comparison instructions...
tcg/arm: use ext* ops in qemu_ld
tcg/arm: bswap arguments in qemu_ld/st if needed
On big endian targets, data arguments of qemu_ld/st ops have to bebyte swapped. Two temporary registers are needed for qemu_st to dothe bswap. r0 and r1 are used in system mode, do the same in usermode, which implies reworking the constraints....
tcg/arm: remove useless register tests in qemu_ld/st
addr_reg, data_reg and data_reg2 can't be register r0 or r1 du to theconstraints. Don't check if they equals these registers.
tcg/arm: fix argument alignment in qemu_st64
64-bit arguments should be aligned on an even register as specifiedby the "Procedure Call Standard for the ARM Architecture".
tcg/arm: optimize register allocation order
The beginning of the register allocation order list on the TCG armtarget matches the list of clobbered registers. This means that when anhelper is called, there is almost always clobbered registers that haveto be spilled....
tcg/arm: don't try to load constants using pc
There is statistically almost 0 chances to use this code, soremove it.
tcg/arm: add ext16u op
Add an ext16u op, either using the uxth instruction on ARMv6+ or twoshifts on previous ARM versions. In both cases the result use the samenumber or less instructions than the pure TCG version.
Also move all sign extension code to separate functions, so that they...
tcg/arm: add bswap ops
Add an bswap16 and bswap32 ops, either using the rev and rev16instructions on ARMv6+ or shifts and logical operations on previousARM versions. In both cases the result use less instructions thanthe pure TCG version.
These ops are also needed by the qemu_ld/st functions....
View revisions
Also available in: Atom