[PATCH] test: add test for bsf/bsr instruction

[Wei Yongjun]

This patch add test for bsf/bsr instruction.

Signed-off-by: Wei Yongjun<yj...@cn.fujitsu.com>
---
 x86/emulator.c |   64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 64 insertions(+), 0 deletions(-)

diff --git a/x86/emulator.c b/x86/emulator.c
index aef5d90..348d548 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -462,6 +462,69 @@ void test_setcc(void *mem)
        report("setnle r/m8", *memb == 0);
 }
 
+void test_bsfbsr(void *mem)
+{
+       unsigned long *memq = mem, rax;
+
+       asm volatile("movw $0xC000, (%[memq])\n\t"
+                    "bsfw (%[memq]), %%ax\n\t"
+                    ::[memq]"r"(memq));
+       asm ("mov %%rax, %[rax]": [rax]"=m"(rax));
+       report("bsfw r/m, reg", rax == 14);
+
+       asm volatile("movl $0xC0000000, (%[memq])\n\t"
+                    "bsfl (%[memq]), %%eax\n\t"
+                    ::[memq]"r"(memq));
+       asm ("mov %%rax, %[rax]": [rax]"=m"(rax));
+       report("bsfl r/m, reg", rax == 30);
+
+       asm volatile("movq $0xC00000000000, %%rax\n\t"
+                    "movq %%rax, (%[memq])\n\t"
+                    "bsfq (%[memq]), %%rax\n\t"
+                    ::[memq]"r"(memq));
+       asm ("mov %%rax, %[rax]": [rax]"=m"(rax));
+       report("bsfq r/m, reg", rax == 46);
+
+       asm volatile("movq $0, %%rax\n\t"
+                    "movq %%rax, (%[memq])\n\t"
+                    "bsfq (%[memq]), %%rax\n\t"
+                    "jnz 1f\n\t"
+                    "movl $1, %[rax]\n\t"
+                    "1:\n\t"
+                    :[rax]"=m"(rax)
+                    :[memq]"r"(memq));
+       report("bsfq r/m, reg", rax == 1);
+
+       asm volatile("movw $0xC000, (%[memq])\n\t"
+                    "bsrw (%[memq]), %%ax\n\t"
+                    ::[memq]"r"(memq));
+       asm ("mov %%rax, %[rax]": [rax]"=m"(rax));
+       report("bsrw r/m, reg", rax == 15);
+
+       asm volatile("movl $0xC0000000, (%[memq])\n\t"
+                    "bsrl (%[memq]), %%eax\n\t"
+                    ::[memq]"r"(memq));
+       asm ("mov %%rax, %[rax]": [rax]"=m"(rax));
+       report("bsrl r/m, reg", rax == 31);
+
+       asm volatile("movq $0xC00000000000, %%rax\n\t"
+                    "movq %%rax, (%[memq])\n\t"
+                    "bsrq (%[memq]), %%rax\n\t"
+                    ::[memq]"r"(memq));
+       asm ("mov %%rax, %[rax]": [rax]"=m"(rax));
+       report("bsrq r/m, reg", rax == 47);
+
+       asm volatile("movq $0, %%rax\n\t"
+                    "movq %%rax, (%[memq])\n\t"
+                    "bsrq (%[memq]), %%rax\n\t"
+                    "jnz 1f\n\t"
+                    "movl $1, %[rax]\n\t"
+                    "1:\n\t"
+                    :[rax]"=m"(rax)
+                    :[memq]"r"(memq));
+       report("bsrq r/m, reg", rax == 1);
+}
+
 int main()
 {
        void *mem;
@@ -495,6 +558,7 @@ int main()
        test_incdecnotneg(mem);
        test_btc(mem);
        test_setcc(mem);
+       test_bsfbsr(mem);
 
        printf("\nSUMMARY: %d tests, %d failures\n", tests, fails);
        return fails ? 1 : 0;
-- 
1.7.0.4


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