diff options
Diffstat (limited to 'core/cortex-m0/mula.S')
-rw-r--r-- | core/cortex-m0/mula.S | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/core/cortex-m0/mula.S b/core/cortex-m0/mula.S deleted file mode 100644 index 02e617c328..0000000000 --- a/core/cortex-m0/mula.S +++ /dev/null @@ -1,81 +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. - * - * Cortex-M0 multiply-accumulate[-accumulate] functions - */ - - .syntax unified - .text - .thumb - -@ uint64_t mula32(uint32_t a, uint32_t b, uint32_t c) -@ -@ Multiply a (r0) and b (r1), add c (r2) and return the product in r1:r0 -@ - .thumb_func - .section .text.mula32 - .global mula32 -mula32: - - push {r4, r5} - uxth r4, r0 /* r4 = a.lo16 */ - uxth r5, r1 /* r5 = b.lo16 */ - uxth r3, r2 /* r3 = c.lo16 */ - muls r4, r5 /* r4 = a.lo16 * b.lo16 */ - adds r4, r3 /* r4 = a.lo16 * b.lo16 + c.lo16 == r.lo32 */ - lsrs r3, r0, 16 /* r3 = a.hi16 */ - lsrs r2, r2, 16 /* r2 = c.hi16 */ - muls r5, r3 /* r5 = a.hi16 * b.lo16 */ - adds r5, r2 /* r5 = a.hi16 * b.lo16 + c.hi16 == r.mid32.1 */ - uxth r2, r0 /* r2 = a.lo16 */ - lsrs r1, r1, 16 /* r1 = b.hi16 */ - muls r2, r1 /* r2 = a.lo16 * b.hi16 == r.mid32.2 */ - muls r1, r3 /* r1 = b.hi16 * a.hi16 == r.hi32 */ - movs r3, 0 /* r3 = 0 */ - adds r5, r2 /* r5 = (r.mid32.1 + r.mid32.2).lo32 == r.mid.lo32 */ - adcs r3, r3 /* r3 = (r.mid32.1 + r.mid32.2).hi32 == r.mid.hi32 */ - lsls r0, r5, 16 /* r0 = r.mid.lo32.lo16 << 16 == r.mid.inpos.lo32 */ - lsrs r5, r5, 16 /* r5 = r.mid.lo32.hi16 >> 16 */ - lsls r3, r3, 16 /* r3 = r.mid.hi.lo16 << 16 */ - adds r3, r5 /* r3 = r5 + r3 = r.mid.inpos.hi32 */ - adds r0, r4 /* r0 = r.lo32 */ - adcs r1, r3 /* r1 = r.hi32 */ - pop {r4, r5} - bx lr - -@ uint64_t mulaa32(uint32_t a, uint32_t b, uint32_t c, uint32_t d) -@ -@ Multiply a (r0) and b (r1), add c (r2), add d (r3) and return the product in -@ r1:r0 - .thumb_func - .section .text.mulaa32 - .global mulaa32 -mulaa32: - - push {r4, r5, r6} - uxth r5, r0 /* r5 = a.lo16 */ - uxth r6, r1 /* r6 = b.lo16 */ - uxth r4, r2 /* r4 = c.lo16 */ - muls r5, r6 /* r5 = a.lo16 * b.lo16 */ - adds r5, r4 /* r5 = a.lo16 * b.lo16 + c.lo16 == r.lo32 */ - lsrs r4, r0, 16 /* r4 = a.hi16 */ - lsrs r2, r2, 16 /* r2 = c.hi16 */ - muls r6, r4 /* r6 = a.hi16 * b.lo16 */ - adds r6, r2 /* r6 = a.hi16 * b.lo16 + c.hi16 == r.mid32.1 */ - uxth r2, r0 /* r2 = a.lo16 */ - lsrs r1, r1, 16 /* r1 = b.hi16 */ - muls r2, r1 /* r2 = a.lo16 * b.hi16 == r.mid32.2 */ - muls r1, r4 /* r1 = b.hi16 * a.hi16 == r.hi32 */ - movs r4, 0 /* r4 = 0 */ - adds r6, r2 /* r6 = (r.mid32.1 + r.mid32.2).lo32 == r.mid.lo32 */ - adcs r4, r4 /* r4 = (r.mid32.1 + r.mid32.2).hi32 == r.mid.hi32 */ - lsls r0, r6, 16 /* r0 = r.mid.lo32.lo16 << 16 == r.mid.inpos.lo32 */ - lsrs r6, r6, 16 /* r6 = r.mid.lo32.hi16 >> 16 */ - lsls r4, r4, 16 /* r4 = r.mid.hi.lo16 << 16 */ - adds r0, r3 /* r0 = r.mid.inposition.lo32 + d */ - adcs r4, r6 /* r4 = r6 + r4 + carry = r.mid.inpos.hi32 */ - adds r0, r5 /* r0 = r.lo32 */ - adcs r1, r4 /* r1 = r.hi32 */ - pop {r4, r5, r6} - bx lr |