lightning.git - Portable just-in-time compiler library

Add the new ccall test case to test interleaved C and jit function calls

* check/cccall.c, check/ccall.ok: New test case to validate interleaved calls from/to C code and jit. * check/Makefile.am: Update for the new ccall test case. * include/lightning.h, lib/lightning.c: Add the new jit_address call that returns the real/final address of a "note" in the generated jit. It requires a jit_node_t as returned by the jit_note call, and is only valid after calling jit_emit. Add an intermediate solution to properly handle arm soft and softfp modes that move a double to an integer register pair. Currently it just adds extra tests for the condition, but the proper solution should be to have extra lightning codes for these conditions, codes which should be only used by the backends that need it, and merged with the existing jit_pusharg*_{f,d}. * include/lightning/jit_private.h: Add new jit_state_t flag to know it finished jit_emit, so that calls to jit_address are valid. * lib/jit_mips.c: Correct abi implementation so that the new ccall test case pass. Major problem was using _jit->function.self.arg{i,f} as boolean values, but that would cause lightning.c:patch_registers() to incorrectly assume only one register was used as argument when calling jit_regarg_p(); _jit->function.self.arg{i,f} must be the number of registers used as arguments (in all backends). * lib/jit_x86.c: Add workaround, by marking %rax as used, to a special condition, when running out of registers and the allocator trying to spill and reload %rax, but %rax was used as a pointer to a function, what would cause the reload to destroy the return value. This condition can be better generalized, but the current solution is good enough. * include/lightning/jit_ppc.h, lib/jit_ppc-cpu.c, lib/jit_ppc.c: Rewrite logic to handle arguments, as the original code was written based on a SysV pdf about the generic powerpc ABI, what did "invent" a new abi for the previous test cases, but failed in the new ccall test in Darwin PPC. Now it properly handles 13 float registers for arguments, as well as proper computation of stack offsets when running out of registers for arguments.

Diffstat (limited to 'lib/jit_ppc-cpu.c')

1 files changed, 16 insertions, 6 deletions