From 3f2546b2ef55b661fd8dd69682b38992225e86f6 Mon Sep 17 00:00:00 2001 From: fishsoupisgood Date: Mon, 29 Apr 2019 01:17:54 +0100 Subject: Initial import of qemu-2.4.1 --- tests/tcg/cris/check_lz.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 tests/tcg/cris/check_lz.c (limited to 'tests/tcg/cris/check_lz.c') diff --git a/tests/tcg/cris/check_lz.c b/tests/tcg/cris/check_lz.c new file mode 100644 index 00000000..69c2e6d4 --- /dev/null +++ b/tests/tcg/cris/check_lz.c @@ -0,0 +1,49 @@ +#include +#include +#include +#include "sys.h" + +static inline int cris_lz(int x) +{ + int r; + asm ("lz\t%1, %0\n" : "=r" (r) : "r" (x)); + return r; +} + +void check_lz(void) +{ + int i; + + if (cris_lz(0) != 32) + err(); + if (cris_lz(1) != 31) + err(); + if (cris_lz(2) != 30) + err(); + if (cris_lz(4) != 29) + err(); + if (cris_lz(8) != 28) + err(); + + /* try all positions with a single bit. */ + for (i = 1; i < 32; i++) { + if (cris_lz(1 << (i-1)) != (32 - i)) + err(); + } + + /* try all positions with all bits. */ + for (i = 1; i < 32; i++) { + /* split up this computation to clarify it. */ + uint32_t val; + val = (unsigned int)-1 >> (32 - i); + if (cris_lz(val) != (32 - i)) + err(); + } +} + +int main(void) +{ + check_lz(); + pass(); + exit(0); +} -- cgit v1.2.3