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1 | #------------------------------------------------------------------------------\r |
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2 | #\r |
| 3 | # Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r |
| 4 | #\r |
| 5 | # This program and the accompanying materials\r |
| 6 | # are licensed and made available under the terms and conditions of the BSD License\r |
| 7 | # which accompanies this distribution. The full text of the license may be found at\r |
| 8 | # http://opensource.org/licenses/bsd-license.php\r |
| 9 | #\r |
| 10 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 11 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 12 | #\r |
| 13 | #------------------------------------------------------------------------------\r |
| 14 | \r |
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15 | #include <AsmMacroIoLib.h>\r |
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16 | \r |
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17 | ASM_FUNC(__clzsi2)\r |
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18 | @ frame_needed = 1, uses_anonymous_args = 0\r |
| 19 | stmfd sp!, {r7, lr}\r |
| 20 | add r7, sp, #0\r |
| 21 | movs r3, r0, lsr #16\r |
| 22 | movne r3, #16\r |
| 23 | moveq r3, #0\r |
| 24 | movne r9, #0\r |
| 25 | moveq r9, #16\r |
| 26 | mov r3, r0, lsr r3\r |
| 27 | tst r3, #65280\r |
| 28 | movne r0, #8\r |
| 29 | moveq r0, #0\r |
| 30 | movne lr, #0\r |
| 31 | moveq lr, #8\r |
| 32 | mov r3, r3, lsr r0\r |
| 33 | tst r3, #240\r |
| 34 | movne r0, #4\r |
| 35 | moveq r0, #0\r |
| 36 | movne ip, #0\r |
| 37 | moveq ip, #4\r |
| 38 | mov r3, r3, lsr r0\r |
| 39 | tst r3, #12\r |
| 40 | movne r0, #2\r |
| 41 | moveq r0, #0\r |
| 42 | movne r1, #0\r |
| 43 | moveq r1, #2\r |
| 44 | mov r2, r3, lsr r0\r |
| 45 | add r3, lr, r9\r |
| 46 | add r0, r3, ip\r |
| 47 | add r1, r0, r1\r |
| 48 | mov r0, r2, lsr #1\r |
| 49 | eor r0, r0, #1\r |
| 50 | ands r0, r0, #1\r |
| 51 | mvnne r0, #0\r |
| 52 | rsb r3, r2, #2\r |
| 53 | and r0, r0, r3\r |
| 54 | add r0, r1, r0\r |
| 55 | ldmfd sp!, {r7, pc}\r |
projects / mirror_edk2.git / blame