diff options
| -rw-r--r-- | sys/src/cmd/8c/txt.c | 2 | ||||
| -rw-r--r-- | sys/src/cmd/cc/lex.c | 13 |
2 files changed, 12 insertions, 3 deletions
diff --git a/sys/src/cmd/8c/txt.c b/sys/src/cmd/8c/txt.c index 4feb0f7f4..9ddeea6ba 100644 --- a/sys/src/cmd/8c/txt.c +++ b/sys/src/cmd/8c/txt.c @@ -865,7 +865,7 @@ gmove(Node *f, Node *t) gmove(f, &fregnode0); gins(AFADDD, nodfconst(-2147483648.), &fregnode0); gins(AFMOVLP, f, &nod); - gins(ASUBL, nodconst(-2147483648), &nod); + gins(ASUBL, nodconst(-0x80000000), &nod); gmove(&nod, t); return; diff --git a/sys/src/cmd/cc/lex.c b/sys/src/cmd/cc/lex.c index 15da69bee..26dc65201 100644 --- a/sys/src/cmd/cc/lex.c +++ b/sys/src/cmd/cc/lex.c @@ -444,7 +444,7 @@ long yylex(void) { vlong vv; - long c, c1, t; + long c, c1, t, w; char *cp; Rune rune; Sym *s; @@ -844,7 +844,16 @@ ncu: yyerror("overflow in constant"); vv = yylval.vval; - if(c1 & Numvlong) { + /* + * c99 is silly: decimal constants stay signed, + * hex and octal go unsigned before widening. + */ + w = 32; + if((c1 & (Numdec|Numuns)) == Numdec) + w = 31; + if(c1 & Numvlong || (c1 & Numlong) == 0 && (uvlong)vv >= 1ULL<<w){ + if((c1&(Numdec|Numvlong)) == Numdec && vv < 1ULL<<32) + warn(Z, "int constant widened to vlong: %s", symb); if((c1 & Numuns) || convvtox(vv, TVLONG) < 0) { c = LUVLCONST; t = TUVLONG; |