From 87d84b7cb8b41a4ebf8dda39edc74acc1382d0e6 Mon Sep 17 00:00:00 2001 From: Joe Soroka Date: Tue, 1 Feb 2011 15:37:58 -0800 Subject: tccasm: allow one-line prefix+op things like "rep stosb" --- tests/tcctest.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) (limited to 'tests/tcctest.c') diff --git a/tests/tcctest.c b/tests/tcctest.c index f62983d..3af3d18 100644 --- a/tests/tcctest.c +++ b/tests/tcctest.c @@ -2132,6 +2132,27 @@ __asm__ __volatile__( return dest; } +static char * strncat2(char * dest,const char * src,size_t count) +{ +int d0, d1, d2, d3; +__asm__ __volatile__( + "repne scasb\n\t" /* one-line repne prefix + string op */ + "decl %1\n\t" + "movl %8,%3\n" + "1:\tdecl %3\n\t" + "js 2f\n\t" + "lodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n" + "2:\txorl %2,%2\n\t" + "stosb" + : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3) + : "0" (src),"1" (dest),"2" (0),"3" (0xffffffff), "g" (count) + : "memory"); +return dest; +} + static inline void * memcpy1(void * to, const void * from, size_t n) { int d0, d1, d2; @@ -2150,6 +2171,24 @@ __asm__ __volatile__( return (to); } +static inline void * memcpy2(void * to, const void * from, size_t n) +{ +int d0, d1, d2; +__asm__ __volatile__( + "rep movsl\n\t" /* one-line rep prefix + string op */ + "testb $2,%b4\n\t" + "je 1f\n\t" + "movsw\n" + "1:\ttestb $1,%b4\n\t" + "je 2f\n\t" + "movsb\n" + "2:" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from) + : "memory"); +return (to); +} + static __inline__ void sigaddset1(unsigned int *set, int _sig) { __asm__("btsl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc"); @@ -2199,6 +2238,10 @@ void asm_test(void) strncat1(buf, " worldXXXXX", 3); printf("%s\n", buf); + memcpy2(buf, "hello", 6); + strncat2(buf, " worldXXXXX", 3); + printf("%s\n", buf); + /* 'A' constraint test */ printf("mul64=0x%Lx\n", mul64(0x12345678, 0xabcd1234)); printf("inc64=0x%Lx\n", inc64(0x12345678ffffffff)); -- cgit v1.3.1