| /* |
| * Copyright (c) 2013 The Native Client Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| .syntax unified |
| .arm |
| .fpu vfp |
| |
| /* |
| * Rounding mode control field is bits [23:22] in FPSCR. |
| * This macro takes the pre-shifted two-bit value and sets bits [23:22]. |
| * |
| * The bit patterns for ARM are: |
| * 0b00 Round to Nearest (RN) mode |
| * 0b01 Round towards Plus Infinity (RP) mode |
| * 0b10 Round towards Minus Infinity (RM) mode |
| * 0b11 Round towards Zero (RZ) mode |
| */ |
| .macro set_rounding_control_field value |
| vmrs r1, fpscr |
| bic r1, r1, #0x00c00000 |
| orr r1, r1, \value |
| vmsr fpscr, r1 |
| |
| bic lr, lr, #0xc000000f |
| bx lr |
| .endm |
| |
| .p2align 4 |
| .global set_round_toward_nearest |
| set_round_toward_nearest: |
| set_rounding_control_field #0 |
| |
| .p2align 4 |
| .global set_round_toward_plus_infinity |
| set_round_toward_plus_infinity: |
| set_rounding_control_field #0x400000 |
| |
| .p2align 4 |
| .global set_round_toward_minus_infinity |
| set_round_toward_minus_infinity: |
| set_rounding_control_field #0x800000 |
| |
| .p2align 4 |
| .global set_round_toward_zero |
| set_round_toward_zero: |
| set_rounding_control_field #0xc00000 |
