#define _ENDLIT .text .L$_subsec
#define _LTORG .L$_subsec = .L$_subsec + 2; .text .L$_subsec
-// ELF section types.
-#if __ELF__
-# if CPUFAM_ARMEL
-# define _SECTTY(ty) %ty
-# else
-# define _SECTTY(ty) @ty
-# endif
-#endif
-
-// Section selection.
-#define TEXT .text .L$_subsec
-#if ABI_WIN
-# define RODATA .section .rdata, "dr"
-#elif __ELF__
-# define RODATA .section .rodata, "a", _SECTTY(progbits)
-#else
-# define RODATA TEXT
-#endif
-#define DATA .data
-
// Announcing an internal function.
#define INTFUNC(name) \
TYPE_FUNC(name); \
#if __ELF__
-#if __PIC__ || __PIE__
-# define WANT_PIC 1
+// Section types.
+#if CPUFAM_ARMEL
+# define _SECTTY(ty) %ty
+#else
+# define _SECTTY(ty) @ty
#endif
-#define TYPE_FUNC(name) .type name, STT_FUNC
+// Section selection.
+#define RODATA .section .rodata, "a", _SECTTY(progbits)
+// Additional symbol metadata.
+#define TYPE_FUNC(name) .type name, STT_FUNC
+#define TYPE_OBJ(name) .type name, STT_OBJECT
#define SIZE_OBJ(name) .size name, . - name
+// Special arrangements for position-independent code.
+#if __PIC__ || __PIE__
+# define WANT_PIC 1
+#endif
+
+// Don't make the stack executable by default.
+#ifndef FORCE_EXECUTABLE_STACK
+ .pushsection .note.GNU-stack, "", _SECTTY(progbits)
+ .popsection
+#endif
+
#endif
///--------------------------------------------------------------------------
#if ABI_WIN
+// Function names need decorating on 32-bit i386.
#if CPUFAM_X86
# define F(name) _##name
#endif
+// Section selection.
+#define RODATA .section .rdata, "dr"
+
#endif
///--------------------------------------------------------------------------
# define INTADDR__1(addr, got) addr
#endif
-// Permutations for SIMD instructions. SHUF(A, B, C, D) is an immediate,
+// Permutations for SIMD instructions. SHUF(D, C, B, A) is an immediate,
// suitable for use in `pshufd' or `shufpd', which copies element A
// (0 <= A < 4) of the source to element 0 of the destination, element B to
// element 1, element C to element 2, and element D to element 3.
-#define SHUF(a, b, c, d) ((a) + 4*(b) + 16*(c) + 64*(d))
+#define SHUF(d, c, b, a) (64*(d) + 16*(c) + 4*(b) + (a))
// Map register names to their individual pieces.
// R_r(decor) applies decoration decor to register r, which is an internal
// register name. The internal register names are: `ip', `a', `b', `c', `d',
// `si', `di', `bp', `sp', `r8'--`r15'.
+#define R_nil(decor) nil
#define R_ip(decor) _DECOR(ip, decor, ip)
#define R_a(decor) _DECOR(abcd, decor, a)
#define R_b(decor) _DECOR(abcd, decor, b)
// assembler-level register name, in place of any decoration that register
// name has already.
+#define _REGFORM_nil(decor) R_nil(decor)
+
#define _REGFORM_ip(decor) R_ip(decor)
#define _REGFORM_eip(decor) R_ip(decor)
#endif
#define WHOLE(reg) _REGFORM(reg, r)
+// Macros for some common registers.
+#define AX R_a(r)
+#define BX R_b(r)
+#define CX R_c(r)
+#define DX R_d(r)
+#define SI R_si(r)
+#define DI R_di(r)
+#define BP R_bp(r)
+#define SP R_sp(r)
+
// Stack management and unwinding.
-.macro setfp fp=R_bp(r), offset=0
+.macro setfp fp=BP, offset=0
.if \offset == 0
- mov \fp, R_sp(r)
+ mov \fp, SP
#if __ELF__
.cfi_def_cfa_register \fp
#endif
.seh_setframe \fp, 0
#endif
.else
- lea \fp, [R_sp(r) + \offset]
+ lea \fp, [SP + \offset]
#if __ELF__
.cfi_def_cfa_register \fp
.cfi_adjust_cfa_offset -\offset
.macro _dropfp fp, offset=0
.if \offset == 0
- mov R_sp(r), \fp
+ mov SP, \fp
#if __ELF__
- .cfi_def_cfa_register R_sp(r)
+ .cfi_def_cfa_register SP
#endif
.else
- lea R_sp(r), [\fp - \offset]
+ lea SP, [\fp - \offset]
#if __ELF__
- .cfi_def_cfa_register R_sp(r)
+ .cfi_def_cfa_register SP
.cfi_adjust_cfa_offset +\offset
#endif
.endif
.endm
.macro stalloc n
- sub R_sp(r), \n
+ sub SP, \n
#if __ELF__
.cfi_adjust_cfa_offset +\n
#endif
.endm
.macro stfree n
- add R_sp(r), \n
+ add SP, \n
#if __ELF__
.cfi_adjust_cfa_offset -\n
#endif
.endm
.macro savexmm r, offset
- movdqa [R_sp(r) + \offset], \r
+ movdqa [SP + \offset], \r
#if ABI_WIN && CPUFAM_AMD64
.seh_savexmm \r, \offset
#endif
.endm
.macro rstrxmm r, offset
- movdqa \r, [R_sp(r) + \offset]
+ movdqa \r, [SP + \offset]
.endm
.macro endprologue
// Internal macros: `_REGFORM_r(decor)' applies decoration decor to register
// name r.
+#define _REGFORM_nil(decor) nil
+
#define _REGFORM_s0(decor) _DECOR(s, decor, 0)
#define _REGFORM_s1(decor) _DECOR(s, decor, 1)
#define _REGFORM_s2(decor) _DECOR(s, decor, 2)
.macro endprologue
.endm
+// cmov RD, RN, CC: set RD to RN if CC is satisfied, otherwise do nothing
+.macro cmov rd, rn, cc
+ csel \rd, \rn, \rd, \cc
+.endm
+
+// Notational improvement: write `csel.CC' etc., rather than `csel ..., CC'.
+#define _COND(_) \
+ _(eq) _(ne) _(cs) _(cc) _(vs) _(vc) _(mi) _(pl) \
+ _(ge) _(lt) _(gt) _(le) _(hi) _(ls) _(al) _(nv) \
+ _(hs) _(lo)
+#define _INST(_) \
+ _(ccmp) _(ccmn) \
+ _(csel) _(cmov) \
+ _(csinc) _(cinc) _(cset) \
+ _(csneg) _(cneg) \
+ _(csinv) _(cinv) _(csetm)
+#define _CONDVAR(cc) _definstvar cc;
+#define _INSTVARS(inst) \
+ .macro _definstvar cc; \
+ .macro inst.\cc args:vararg; inst \args, \cc; .endm; \
+ .endm; \
+ _COND(_CONDVAR); \
+ .purgem _definstvar;
+ _INST(_INSTVARS)
+#undef _COND
+#undef _INST
+#undef _CONDVAR
+#undef _INSTVARS
+
+// Flag bits for `ccmp' and friends.
+#define CCMP_N 8
+#define CCMP_Z 4
+#define CCMP_C 2
+#define CCMP_V 1
+
+// Flag settings for satisfying conditions.
+#define CCMP_MI CCMP_N
+#define CCMP_PL 0
+#define CCMP_EQ CCMP_Z
+#define CCMP_NE 0
+#define CCMP_CS CCMP_C
+#define CCMP_HS CCMP_C
+#define CCMP_CC 0
+#define CCMP_LO 0
+#define CCMP_VS CCMP_V
+#define CCMP_VC 0
+#define CCMP_HI CCMP_C
+#define CCMP_LS 0
+#define CCMP_LT CCMP_N
+#define CCMP_GE 0
+#define CCMP_LE CCMP_N
+#define CCMP_GT 0
+
#endif
///--------------------------------------------------------------------------
# define ENDFUNC_HOOK(_)
#endif
+// Section selection.
+#ifndef TEXT
+# define TEXT .text .L$_subsec
+#endif
+#ifndef RODATA
+# define RODATA TEXT
+#endif
+#ifndef DATA
+# define DATA .data
+#endif
+
+// Symbol decoration.
#ifndef F
-# define F(name) name
+# ifdef SYM_USCORE
+# define F(name) _##name
+# else
+# define F(name) name
+# endif
#endif
#ifndef TYPE_FUNC
# define TYPE_FUNC(name)
#endif
-
+#ifndef TYPE_OBJ
+# define TYPE_OBJ(name)
+#endif
#ifndef SIZE_OBJ
# define SIZE_OBJ(name)
#endif
-#if __ELF__ && !defined(WANT_EXECUTABLE_STACK)
- .pushsection .note.GNU-stack, "", _SECTTY(progbits)
- .popsection
-#endif
-
///----- That's all, folks --------------------------------------------------
#endif
~mdw / catacomb / blobdiff