Commit Graph

2083 Commits

Author SHA1 Message Date
Michael Matz
0381387640 x86-asm: Correctly infer register size for bools
Register operands of type _Bool weren't correctly getting
the 8-bit sized registers (but rather used the default 32-bit
ones).
2016-12-15 17:47:10 +01:00
Michael Matz
9e0af6d2b5 x86-64-asm: Implement cmpxchg16b 2016-12-15 17:47:10 +01:00
Michael Matz
ca8c1cd643 x86-64: Allow loads from some structs/unions
GCC allows register loads for asms based on type mode,
and correctly sized structs/union have an allowed mode
(basically 1,2,4,8 sized aggregates).
2016-12-15 17:47:10 +01:00
Michael Matz
9ae10cad1f tccasm: Lookup C symbols from ASM blocks
It's now possible to use symbols defined in C code to be used
from later inline asm blocks.  See testcase.
2016-12-15 17:47:10 +01:00
Michael Matz
c4edfb4e08 tccasm: Implement .set sym, expr
That, as well as "sym = expr", if expr contains symbols.
Slightly tricky because a definition from .set is overridable,
whereas proper definitions aren't.

This doesn't yet allow using this for override tricks from C
and global asm blocks because the symbol tables from C and asm
are separate.
2016-12-15 17:47:10 +01:00
Michael Matz
34fc6435ee enums and ints are compatible
But like GCC do warn about changes in signedness.  The latter
leads to some changes in gen_assign_cast to not also warn about
  unsigned* = int*
(where GCC warns, but only with extra warnings).
2016-12-15 17:47:10 +01:00
Michael Matz
b1a906b970 enums and ints are compatible 2016-12-15 17:47:10 +01:00
Michael Matz
c0368604e1 x86-64-asm: Fix ltr/str and push/pop operands
str accepts rm16/r32/r64, and push/pop defaults to 64 when given
memory operands (to 32 on i386).
2016-12-15 17:47:10 +01:00
Michael Matz
45b24c37a0 x86-64-asm: Implement high %cr registers 2016-12-15 17:47:09 +01:00
Michael Matz
4e46c22d5c struct-init: Support range inits for local vars
Implement missing support for range init for local variables.
2016-12-15 17:47:09 +01:00
Michael Matz
4cb7047f0f x86-64-asm: Support high registers %r8 - %r15
This requires correctly handling the REX prefix.
As bonus we now also support the four 8bit registers
spl,bpl,sil,dil, which are decoded as ah,ch,dh,bh in non-long-mode
(and require a REX prefix as well).
2016-12-15 17:47:09 +01:00
Michael Matz
8765826465 inline-asm: Accept "flags" clobber 2016-12-15 17:47:09 +01:00
Michael Matz
b7ca74577b struct-init: Allow member initialization from qualified lvalues
See testcase.
2016-12-15 17:47:09 +01:00
Michael Matz
9e86ebee94 struct-init: Correctly parse unnamed member initializers
For
  union U { struct {int a,b}; int c; };
  union U u = {{ 1, 2, }};
The unnamed first member of union U needs to actually exist in the
structure so initializer parsing isn't confused about the double braces.
That means also the a and b members must be part of _that_, not of
union U directly.  Which in turn means we need to do a bit more work
for field lookup.

See the testcase extension for more things that need to work.
2016-12-15 17:47:09 +01:00
Michael Matz
21da73c383 struct-init: Cleanup some more
Some parameters aren't actually necessary.  Also join the
two parsing loops for the initializer list of arrays and structs.
2016-12-15 17:47:09 +01:00
Michael Matz
7bf323843e struct-init: Cleanup
Remove dead code and variables.  Properly check for unions when
skipping fields in initializers.  Make tests2/*.expect depend
on the .c files so they are automatically rebuilt when the latter
change.
2016-12-15 17:47:09 +01:00
Michael Matz
ed7d54651d struct-init: Implement initializing subaggregates
E.g. "struct { struct S s; int a;} = { others, 42 };"
if 'others' is also a 'struct S'.  Also when the value is a
compound literal.  See added testcases.
2016-12-15 17:47:09 +01:00
Michael Matz
968bccdd2a struct-init: Reimplement
Start reimplementing the whole initializer handling to be
conforming to ISO C.  This patch just reimplements current
functionality to prepare for further changes, all tests pass.
2016-12-15 17:47:09 +01:00
Michael Matz
5d0c16a884 Support attribute between double pointer stars
"int * __attribute__((something)) *" is supported by GCC.
2016-12-15 17:47:09 +01:00
Michael Matz
662338f116 Fix function to pointer conversion
This snippet is valid:
  void foo(void);
  ... foo + 42 ...
the function designator is converted to pointer to function
implicitely.  gen_op didn't do that and bailed out.
2016-12-15 17:47:08 +01:00
Michael Matz
e034853b38 Fix parsing array typedefs of unknown size
This must compile:
 typedef int arrtype1[];
 arrtype1 sinit19 = {1};
 arrtype1 sinit20 = {2,3};
and generate two arrays of one resp. two elements.  Before the fix
the determined size of the first array was encoded in the type
directly, so sinit20 couldn't be parsed anymore (because arrtype1
was thought to be only one element long).
2016-12-15 17:47:08 +01:00
Michael Matz
b7e0b693a6 tccpp: Implement __BASE_FILE__ macro
Like __FILE__ but always refers to the command line file name also
from inside headers.
2016-12-15 17:47:08 +01:00
Michael Matz
8a1a2a6033 Implement __builtin_choose_expr
Follows GCC implementation.
2016-12-15 17:47:08 +01:00
Michael Matz
10e4db45dc x86-asm: Implement prefetchw opcode 2016-12-15 17:47:08 +01:00
Michael Matz
5692716770 x86-asm: Fix lar opcode operands
lar can accept multiple sizes as well (wlx), like lsl.  When using
autosize it's important to look at the destination operand first;
when it's a register that one determines the size, not the input
operand.
2016-12-15 17:47:08 +01:00
Michael Matz
e3f2a68311 tcc-asm: Parse .size directive correctly
When the .size directive was closed with a ';' tcc eat everything after
it up to lineend.
2016-12-15 17:47:08 +01:00
Michael Matz
6a5ec8cb3c x86-asm: More opcodes
Some new opcodes and some aliases: ljmp[wl], prefetch{nta,t0,t1,t2},
bswap[lq], sysretq, swapgs.
2016-12-15 17:47:08 +01:00
Michael Matz
d9d029006c x86-asm: Add [sl][ig]dtq opcodes
GAS has alias lgdtq for lgdt (similar for saves and GDT).  It doesn't
have the same for LDT.
2016-12-15 17:47:08 +01:00
Michael Matz
75e8df126f inline asm: Accept 'R' constraint
This is like 'r' but only accepts the eight legacy regs.  Currently
that's the same as 'r' because we don't support the high ones.
2016-12-15 17:47:08 +01:00
Michael Matz
f6c1eb10e2 x86-asm: Implement fxrstorq and fxsaveq 2016-12-15 17:47:08 +01:00
Michael Matz
2b618c1ab4 Fix parsing attributes for struct decls
Given this code:

  struct __attribute__((...)) Name {...};

TCC was eating "Name", hence generating an anonymous struct.
It also didn't apply any packed attributes to the parsed
members.  Both fixed.  The testcase also contains a case
that isn't yet handled by TCC (under a BROKEN #define).
2016-12-15 17:47:08 +01:00
Michael Matz
7e51546624 x86-asm: Implement clflush opcode 2016-12-15 17:47:08 +01:00
Michael Matz
e5f4f8d0e7 inline asm: Accept "e" constraint
This is meant to be a (sign-extended) 32bit constant (possibly
symbolic).  We don't do any checks and simply regard it as "i".
2016-12-15 17:47:08 +01:00
Michael Matz
bbce31552e inline asm: accept concatenated strings in constraints
This really should be handled implicitly in the preprocessor,
but for now this is enough.
2016-12-15 17:47:08 +01:00
Michael Matz
f9423ff3fa inline asm: Fix 'P' and accept some r<nr> registers
A 'P' template modifier should avoid adding a '$' to literal
arguments.  Also accept the numbered r8+ registers in an inline
asm clobber list (ignoring them for now).
2016-12-15 17:47:07 +01:00
Michael Matz
10c3514889 Accept symbols in initializers also on 64 bit
Those should use long or long long type, and generate a 64bit reloc.
2016-12-15 17:47:07 +01:00
Michael Matz
920474115c x86-64-asm: More opcodes
Implement some more opcodes, syscall, sysret, lfence, mfence, sfence.
2016-12-15 17:47:07 +01:00
Michael Matz
1a5eacb445 tccasm: Implement compare expressions
I.e. implement < > <= >= == !=.  Comparisons are signed and result
is -1 if true, 0 if false.
2016-12-15 17:47:07 +01:00
Michael Matz
ff5561ff7d x86-64-asm: Accept expressions for .quad
The x86-64 target has 64bit relocs, and hence can accept
generic expressions for '.quad'.
2016-12-15 17:47:07 +01:00
Michael Matz
253afeed1e inline asm: Accept 'p' constraint and 'P' template mod
'p' is conservatively the same as 'r' and 'P' as template
modifier can be ignored in TCC.
2016-12-15 17:47:07 +01:00
Michael Matz
63e3ff7cca tccasm: Accept .balign 2016-12-15 17:47:07 +01:00
Michael Matz
8e4da42384 Accept more asm expressions
In particular subtracting a defined symbol from current section
makes the value PC relative, and .org accepts symbolic expressions
as well, if the symbol is from the current section.
2016-12-15 17:47:07 +01:00
Michael Matz
c82e52d55b tccasm: Implement .pushsection and .popsection 2016-12-15 17:47:06 +01:00
Michael Matz
6763b02abc Accept empty struct member decls
struct S { /*nothing*/; int a; };

is an acceptable struct declaration, there may be stray semicolons
in the member list.
2016-12-15 17:47:06 +01:00
Michael Matz
d5d881d9e9 x86-asm: Accept 'q' modifier
In inline extended asm '%q1' refers to the 64bit register of operand 1.
2016-12-15 17:47:06 +01:00
Michael Matz
8531de319a Accept concatenated strings in attributes
attribute(section("one" "two")) should be accepted (the section
name being "onetwo"), it's normal string concatenation.
2016-12-15 17:47:06 +01:00
Michael Matz
b6799ccd2e Accept -Wp,args
These are preprocessor cmdline arguments, but even in GCC they
aren't specified but rather left as being subject to changes.
Nobody should use them, but let's to a half-assed attempt
at accepting them.
2016-12-15 17:47:06 +01:00
Michael Matz
2b3c7d2287 Change dependency file format a bit
The linux fixdep parse is very stupid and only recognizes
a target token when ':' is part of it.  A space is permitted
in Makefile syntax, but it's easier to change our emitter
than all fixdep parsers out there.
2016-12-15 17:47:06 +01:00
Michael Matz
b285fc50f3 Add --param, reject -mARG if ARG not 32 or 64 2016-12-15 17:47:06 +01:00
Michael Matz
9285149548 Implement -include cmdline option
This option includes a file as if '#include "file"' is the first
line of compiled files.  It's processed after all -D/-U options
and is processed per input file.
2016-12-15 17:47:06 +01:00