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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 |
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5 | # SPDX-License-Identifier: BSD-2-Clause-Patent\r |
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6 | #\r |
| 7 | #------------------------------------------------------------------------------\r |
| 8 | \r |
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9 | #include <AsmMacroIoLib.h>\r |
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10 | \r |
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11 | ASM_FUNC(__clzsi2)\r |
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12 | @ frame_needed = 1, uses_anonymous_args = 0\r |
| 13 | stmfd sp!, {r7, lr}\r |
| 14 | add r7, sp, #0\r |
| 15 | movs r3, r0, lsr #16\r |
| 16 | movne r3, #16\r |
| 17 | moveq r3, #0\r |
| 18 | movne r9, #0\r |
| 19 | moveq r9, #16\r |
| 20 | mov r3, r0, lsr r3\r |
| 21 | tst r3, #65280\r |
| 22 | movne r0, #8\r |
| 23 | moveq r0, #0\r |
| 24 | movne lr, #0\r |
| 25 | moveq lr, #8\r |
| 26 | mov r3, r3, lsr r0\r |
| 27 | tst r3, #240\r |
| 28 | movne r0, #4\r |
| 29 | moveq r0, #0\r |
| 30 | movne ip, #0\r |
| 31 | moveq ip, #4\r |
| 32 | mov r3, r3, lsr r0\r |
| 33 | tst r3, #12\r |
| 34 | movne r0, #2\r |
| 35 | moveq r0, #0\r |
| 36 | movne r1, #0\r |
| 37 | moveq r1, #2\r |
| 38 | mov r2, r3, lsr r0\r |
| 39 | add r3, lr, r9\r |
| 40 | add r0, r3, ip\r |
| 41 | add r1, r0, r1\r |
| 42 | mov r0, r2, lsr #1\r |
| 43 | eor r0, r0, #1\r |
| 44 | ands r0, r0, #1\r |
| 45 | mvnne r0, #0\r |
| 46 | rsb r3, r2, #2\r |
| 47 | and r0, r0, r3\r |
| 48 | add r0, r1, r0\r |
| 49 | ldmfd sp!, {r7, pc}\r |
projects / mirror_edk2.git / blame