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[libc] Add flsll()

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-04-27 16:11:44 +01:00
parent 3ffd309375
commit d36e814b8a
4 changed files with 112 additions and 7 deletions
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37
src/tests/math_test.c
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@@ -44,6 +44,16 @@ __attribute__ (( noinline )) int flsl_var ( long value ) {
return flsl ( value );
}
/**
* Force a call to the non-constant implementation of flsll()
*
* @v value Value
* @ret msb Most significant bit set in value (LSB=1), or zero
*/
__attribute__ (( noinline )) int flsll_var ( long long value ) {
return flsll ( value );
}
/**
* Check current stack pointer
*
@@ -181,6 +191,25 @@ flsl_okx ( long value, int msb, const char *file, unsigned int line ) {
}
#define flsl_ok( value, msb ) flsl_okx ( value, msb, __FILE__, __LINE__ )
/**
* Report a flsll() test result
*
* @v value Value
* @v msb Expected MSB
* @v file Test code file
* @v line Test code line
*/
static inline __attribute__ (( always_inline )) void
flsll_okx ( long long value, int msb, const char *file, unsigned int line ) {
/* Verify as a constant (requires to be inlined) */
okx ( flsll ( value ) == msb, file, line );
/* Verify as a non-constant */
okx ( flsll_var ( value ) == msb, file, line );
}
#define flsll_ok( value, msb ) flsll_okx ( value, msb, __FILE__, __LINE__ )
/**
* Report a 64-bit unsigned integer division test result
*
@@ -251,6 +280,14 @@ static void math_test_exec ( void ) {
flsl_ok ( -1U, ( 8 * sizeof ( int ) ) );
flsl_ok ( -1UL, ( 8 * sizeof ( long ) ) );
/* Test flsll() */
flsll_ok ( 0, 0 );
flsll_ok ( 1, 1 );
flsll_ok ( 0x6d63623330ULL, 39 );
flsll_ok ( -1U, ( 8 * sizeof ( int ) ) );
flsll_ok ( -1UL, ( 8 * sizeof ( long ) ) );
flsll_ok ( -1ULL, ( 8 * sizeof ( long long ) ) );
/* Test 64-bit arithmetic
*
* On a 64-bit machine, these tests are fairly meaningless.