x86-64: Add alloca.

Shinichiro Hamaji committed 17 years ago

Commit 8ea83051 parent 110a4ed2 files · +37 −0Browse files

Unified · Split

2 files

Makefile +4 −0
lib/alloca86_64.S +33 −0

 endif
 ifeq ($(ARCH),i386)
 LIBTCC1_OBJS+=alloca86.o alloca86-bt.o
+else
+ifeq ($(ARCH),x86-64)
+LIBTCC1_OBJS+=alloca86_64.o
+endif
 endif
 %.o: %.c

lib/alloca86_64.S+33−0

@@ -0,0 +1,33 @@
		1	/* ---------------------------------------------- */
		2	/* alloca86_64.S */
		3
		4	#include "../config.h"
		5
		6	.globl alloca
		7
		8	alloca:
		9	pop %rdx
		10	mov %rdi,%rax
		11	add $3,%rax
		12	and $-4,%rax
		13	jz p3
		14
		15	#ifdef TCC_TARGET_PE
		16	/* XXX: not tested */
		17	p1:
		18	cmp $4096,%rax
		19	jle p2
		20	sub $4096,%rsp
		21	sub $4096,%rax
		22	test %rax,(%rsp)
		23	jmp p1
		24	p2:
		25	#endif
		26
		27	sub %rax,%rsp
		28	mov %rsp,%rax
		29	p3:
		30	push %rdx
		31	ret
		32
		33	/* ---------------------------------------------- */