diff options
Diffstat (limited to 'core/cortex-m/llsr.c')
| -rw-r--r-- | core/cortex-m/llsr.c | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/core/cortex-m/llsr.c b/core/cortex-m/llsr.c deleted file mode 100644 index 0827121e97..0000000000 --- a/core/cortex-m/llsr.c +++ /dev/null @@ -1,65 +0,0 @@ -/* Copyright 2018 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -/* Enable the use of right shift for uint64_t. */ - -#include <console.h> -#include <compile_time_macros.h> -#include <stdint.h> - -union words { - uint64_t u64; - uint32_t w[2]; -}; - -uint64_t __attribute__((used)) __aeabi_llsr(uint64_t v, uint32_t shift) -{ - union words val; - union words res; - - val.u64 = v; - res.w[1] = val.w[1] >> shift; - res.w[0] = val.w[0] >> shift; - res.w[0] |= val.w[1] >> (shift - 32); /* Handle shift >= 32*/ - res.w[0] |= val.w[1] << (32 - shift); /* Handle shift <= 32*/ - return res.u64; -} - -#ifdef CONFIG_LLSR_TEST - -static int command_llsr(int argc, char **argv) -{ - /* Volatile to prevent compilier optimization from interfering. */ - volatile uint64_t start = 0x123456789ABCDEF0ull; - uint32_t x; - - const struct { - uint32_t shift_by; - uint64_t result; - } cases[] = { - {0, start}, - {16, 0x123456789ABCull}, - {32, 0x12345678u}, - {48, 0x1234u}, - {64, 0u} - }; - - for (x = 0; x < ARRAY_SIZE(cases); ++x) { - if ((start >> cases[x].shift_by) != cases[x].result) { - ccprintf("FAILED %d\n", cases[x].shift_by); - return EC_ERROR_UNKNOWN; - } - } - - ccprintf("SUCCESS\n"); - return EC_SUCCESS; -} - -DECLARE_CONSOLE_COMMAND( - llsrtest, command_llsr, - "", - "Run tests against the LLSR ABI. Prints SUCCESS or FAILURE."); - -#endif /* CONFIG_LLSR_TEST */ |