diff options
Diffstat (limited to 'emit.c')
| -rw-r--r-- | emit.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/emit.c b/emit.c index 2c0b3cc..ccbd516 100644 --- a/emit.c +++ b/emit.c @@ -137,13 +137,14 @@ slot(int s, Fn *fn) /* sign extend s using a bitfield */ x.i = s; + assert(x.i <= fn->slot); /* specific to NAlign == 3 */ if (x.i < 0) return -4 * x.i; - else { - assert(fn->slot >= x.i); + else if (fn->vararg) + return -176 + -4 * (fn->slot - x.i); + else return -4 * (fn->slot - x.i); - } } static void @@ -481,7 +482,7 @@ framesz(Fn *fn) o ^= 1 & (fn->reg >> rclob[i]); f = fn->slot; f = (f + 3) & -4; - return 4*f + 8*o; + return 4*f + 8*o + 176*fn->vararg; } void @@ -504,20 +505,27 @@ emitfn(Fn *fn, FILE *f) static int id0; Blk *b, *s; Ins *i, itmp; - int *r, c, fs; + int *r, c, fs, o, n; fprintf(f, ".text\n"); if (fn->export) fprintf(f, ".globl %s%s\n", symprefix, fn->name); fprintf(f, "%s%s:\n" - "\tpush %%rbp\n" - "\tmov %%rsp, %%rbp\n", + "\tpushq %%rbp\n" + "\tmovq %%rsp, %%rbp\n", symprefix, fn->name ); fs = framesz(fn); if (fs) fprintf(f, "\tsub $%d, %%rsp\n", fs); + if (fn->vararg) { + o = -176; + for (r=rsave; r-rsave<6; ++r, o+=8) + fprintf(f, "\tmovq %%%s, %d(%%rbp)\n", rname[*r][0], o); + for (n=0; n<8; ++n, o+=16) + fprintf(f, "\tmovaps %%xmm%d, %d(%%rbp)\n", n, o); + } for (r=rclob; r-rclob < NRClob; r++) if (fn->reg & BIT(*r)) { itmp.arg[0] = TMP(*r); |