tccasm: Accept .balign

tccasm.c

@@ -368,6 +368,7 @@ static void asm_parse_directive(TCCState *s1)
     sec = cur_text_section;
     switch(tok) {
     case TOK_ASMDIR_align:
+    case TOK_ASMDIR_balign:
     case TOK_ASMDIR_p2align:
     case TOK_ASMDIR_skip:
     case TOK_ASMDIR_space:
@@ -381,7 +382,7 @@ static void asm_parse_directive(TCCState *s1)
             n = 1 << n;
             tok1 = TOK_ASMDIR_align;
         }
-        if (tok1 == TOK_ASMDIR_align) {
+        if (tok1 == TOK_ASMDIR_align || tok1 == TOK_ASMDIR_balign) {
             if (n < 0 || (n & (n-1)) != 0)
                 tcc_error("alignment must be a positive power of two");
             offset = (ind + n - 1) & -n;

tcctok.h

@@ -305,6 +305,7 @@
  DEF_ASMDIR(byte)              /* must be first directive */
  DEF_ASMDIR(word)
  DEF_ASMDIR(align)
+ DEF_ASMDIR(balign)
  DEF_ASMDIR(p2align)
  DEF_ASMDIR(skip)
  DEF_ASMDIR(space)

tests/asmtest.S

@@ -11,6 +11,7 @@
    .align 8
    .byte 1
 /* .align 16, 0x90 gas is too clever for us with 0x90 fill */
+   .balign 4, 0x92
    .align 16, 0x91 /* 0x91 tests the non-clever behaviour */
    .skip 3
    .skip 15, 0x90