diff options
Diffstat (limited to 'arm-gen.c')
| -rw-r--r-- | arm-gen.c | 26 |
1 files changed, 23 insertions, 3 deletions
@@ -2122,17 +2122,37 @@ void ggoto(void) /* Save the stack pointer onto the stack and return the location of its address */ ST_FUNC void gen_vla_sp_save(int addr) { - tcc_error("variable length arrays unsupported for this target"); + SValue v; + v.type.t = VT_PTR; + v.r = VT_LOCAL | VT_LVAL; + v.c.i = addr; + store(TREG_SP, &v); } /* Restore the SP from a location on the stack */ ST_FUNC void gen_vla_sp_restore(int addr) { - tcc_error("variable length arrays unsupported for this target"); + SValue v; + v.type.t = VT_PTR; + v.r = VT_LOCAL | VT_LVAL; + v.c.i = addr; + load(TREG_SP, &v); } /* Subtract from the stack pointer, and push the resulting value onto the stack */ ST_FUNC void gen_vla_alloc(CType *type, int align) { - tcc_error("variable length arrays unsupported for this target"); + int r = intr(gv(RC_INT)); + o(0xE04D0000|(r<<12)|r); /* sub r, sp, r */ +#ifdef TCC_ARM_EABI + if (align < 8) + align = 8; +#else + if (align < 4) + align = 4; +#endif + if (align & (align - 1)) + tcc_error("alignment is not a power of 2: %i", align); + o(stuff_const(0xE3C0D000|(r<<16), align - 1)); /* bic sp, r, #align-1 */ + vpop(); } /* end of ARM code generator */ |