diff options
Diffstat (limited to 'amd64/isel.c')
| -rw-r--r-- | amd64/isel.c | 52 |
1 files changed, 25 insertions, 27 deletions
diff --git a/amd64/isel.c b/amd64/isel.c index 570bff6..4181e26 100644 --- a/amd64/isel.c +++ b/amd64/isel.c @@ -202,7 +202,7 @@ static void sel(Ins i, ANum *an, Fn *fn) { Ref r0, r1, tmp[7]; - int x, j, k, kc, swap; + int x, j, k, kc, sh, swap; int64_t sz; Ins *i0, *i1; @@ -273,35 +273,33 @@ sel(Ins i, ANum *an, Fn *fn) fixarg(&curi->arg[0], k, curi, fn); break; case Oultof: - /* - %mask =l and %arg.0, 1 - %isbig =l shr %arg.0, 63 - %divided =l shr %arg.0, %isbig - %or =l or %mask, %divided - %float =d sltof %or - %cast =l cast %float - %addend =l shl %isbig, 52 - %sum =l add %cast, %addend - %result =d cast %sum + /* %mask =l and %arg.0, 1 + %isbig =l shr %arg.0, 63 + %divided =l shr %arg.0, %isbig + %or =l or %mask, %divided + %float =d sltof %or + %cast =l cast %float + %addend =l shl %isbig, 52 + %sum =l add %cast, %addend + %result =d cast %sum */ r0 = newtmp("utof", k, fn); if (k == Ks) - kc = Kw; + kc = Kw, sh = 23; else - kc = Kl; + kc = Kl, sh = 52; for (j=0; j<4; j++) tmp[j] = newtmp("utof", Kl, fn); for (; j<7; j++) tmp[j] = newtmp("utof", kc, fn); emit(Ocast, k, i.to, tmp[6], R); emit(Oadd, kc, tmp[6], tmp[4], tmp[5]); - emit(Oshl, kc, tmp[5], tmp[1], getcon(k == Ks ? 23 : 52, fn)); + emit(Oshl, kc, tmp[5], tmp[1], getcon(sh, fn)); emit(Ocast, kc, tmp[4], r0, R); - emit(Osltof, k, r0, tmp[3], R); emit(Oor, Kl, tmp[3], tmp[0], tmp[2]); emit(Oshr, Kl, tmp[2], i.arg[0], tmp[1]); - sel(*curi++, an, fn); + sel(*curi++, 0, fn); emit(Oshr, Kl, tmp[1], i.arg[0], getcon(63, fn)); fixarg(&curi->arg[0], Kl, curi, fn); emit(Oand, Kl, tmp[0], i.arg[0], getcon(1, fn)); @@ -309,30 +307,30 @@ sel(Ins i, ANum *an, Fn *fn) break; case Ostoui: i.op = Ostosi; - r0 = newtmp("ftou", Ks, fn); + kc = Ks; + tmp[4] = getcon(0xdf000000, fn); goto Oftoui; case Odtoui: i.op = Odtosi; - r0 = newtmp("ftou", Kd, fn); + kc = Kd; + tmp[4] = getcon(0xc3e0000000000000, fn); Oftoui: - if (k == Kw) { + if (k == Kw) goto Emit; - } + r0 = newtmp("ftou", kc, fn); for (j=0; j<4; j++) tmp[j] = newtmp("ftou", Kl, fn); emit(Oor, Kl, i.to, tmp[0], tmp[3]); emit(Oand, Kl, tmp[3], tmp[2], tmp[1]); emit(i.op, Kl, tmp[2], r0, R); - if (i.op == Ostosi) - emit(Oadd, Ks, r0, getcon(0xdf000000, fn), i.arg[0]); - else - emit(Oadd, Kd, r0, getcon(0xc3e0000000000000, fn), i.arg[0]); - i1 = curi; - fixarg(&i1->arg[0], i.op == Ostosi ? Ks : Kd, i1, fn); - fixarg(&i1->arg[1], i.op == Ostosi ? Ks : Kd, i1, fn); + emit(Oadd, kc, r0, tmp[4], i.arg[0]); + i1 = curi; /* fixarg() can change curi */ + fixarg(&i1->arg[0], kc, i1, fn); + fixarg(&i1->arg[1], kc, i1, fn); emit(Osar, Kl, tmp[1], tmp[0], getcon(63, fn)); emit(i.op, Kl, tmp[0], i.arg[0], R); fixarg(&curi->arg[0], Kl, curi, fn); + break; case Onop: break; case Ostored: |