This patch series is dependent on the "tcg cleanups, part 4" patch series.
The first patch merges the 64-bit code generator with the cleaned-up 32-bit code generator. I think the result is going to be easier to maintain than the two generators separately. I've spot-checked the code for 32-bit at -O2; I think the compiler has done a good job compiling away the 64-bit parts. The second patch uses the segmentation registers to implement GUEST_BASE. This is only a mild space-savings for 32-bit (3 bytes per guest access), but for 64-bit it can be very helpful. Consider the new -R option for reserving an address-space: Reserved 0x80000000 bytes of guest address space host mmap_min_addr=0x1000 guest_base 0x7fff74be1000 The area the OS reserved for us often turns out to be in high memory. Before this patch, we wind up emitting movq $large,%rax addq %addr,%rax The reduction by using a segment register is 11 bytes (and 2 insns) per guest access. r~ Richard Henderson (2): tcg-i386: Merge 64-bit generation. tcg-i386: Use segment registers to implement GUEST_BASE. configure | 2 + tcg/i386/tcg-target.c | 1276 ++++++++++++++++++++++++++++++----------- tcg/i386/tcg-target.h | 61 ++- tcg/x86_64/tcg-target.c | 1445 ----------------------------------------------- tcg/x86_64/tcg-target.h | 101 ---- 5 files changed, 996 insertions(+), 1889 deletions(-) delete mode 100644 tcg/x86_64/tcg-target.c delete mode 100644 tcg/x86_64/tcg-target.h
