From 7d029e3037b64dca6224151ea143d23cd03a26cd Mon Sep 17 00:00:00 2001 From: Xavier Leroy Date: Fri, 28 Oct 2016 11:01:57 +0200 Subject: runtime/powerpc: remove useless files, add comments --- runtime/powerpc/i64_smul.s | 76 ---------------------------------------------- runtime/powerpc/i64_umul.s | 64 -------------------------------------- 2 files changed, 140 deletions(-) delete mode 100644 runtime/powerpc/i64_smul.s delete mode 100644 runtime/powerpc/i64_umul.s (limited to 'runtime') diff --git a/runtime/powerpc/i64_smul.s b/runtime/powerpc/i64_smul.s deleted file mode 100644 index 9eb453d4..00000000 --- a/runtime/powerpc/i64_smul.s +++ /dev/null @@ -1,76 +0,0 @@ -# ***************************************************************** -# -# The Compcert verified compiler -# -# Xavier Leroy, INRIA Paris -# -# Copyright (c) 2016 Institut National de Recherche en Informatique et -# en Automatique. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# * Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# * Neither the name of the nor the -# names of its contributors may be used to endorse or promote products -# derived from this software without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING -# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -# -# ********************************************************************* - -# Helper functions for 64-bit integer arithmetic. PowerPC version. - - .text - -# Signed multiply high - -# Reference C implementation in ../c/i64_smul.c - - .balign 16 - .globl __i64_smulh -__i64_smulh: - # u1 in r3; u0 in r4; v1 in r5; v0 in r6 - # First compute unsigned product (see i64_umul.s) - mulhwu r0, r4, r6 # k (in r0) = high((u64) u0 * (u64) v0) - mullw r8, r3, r6 - mulhwu r7, r3, r6 # t (in r8:r7) = (u64) u1 * (u64) v0 - addc r0, r8, r0 # w1 (in r0) = low (t + k) - addze r9, r7 # w2 (in r9) = high (t + k) - mullw r8, r4, r5 - mulhwu r7, r4, r5 # t (in r8:r7) = (u64) u0 * (u64) v1 - addc r0, r8, r0 # tmp (in r0) = low (t + w1) - addze r0, r7 # k (in r0) = high(t + w1) - mullw r8, r3, r5 - mulhwu r7, r3, r5 # t (in r8:r7) = (u64) u1 * (u64) v1 - addc r8, r8, r9 # add w2 - addze r7, r7 - addc r8, r8, r0 # add k - addze r7, r7 - # Here r8:r7 contains the high 64 bits of the unsigned product - srawi r0, r3, 31 # r0 = 0 if U >= 0, -1 if U < 0 - srawi r9, r5, 31 # r9 = 0 if V >= 0, -1 if V < 0 - and r3, r3, r9 - and r4, r4, r9 # r3:r4 = U if V < 0, = 0 if V >= 0 - and r5, r5, r0 - and r6, r6, r0 # r5:r6 = V if U < 0, = 0 if U >= 0 - subfc r8, r4, r8 - subfe r7, r3, r7 - subfc r4, r6, r8 - subfe r3, r5, r7 # result is r8:r7 - r3:r4 - r5:r6 - blr - .type __i64_umulh, @function - .size __i64_umulh, .-__i64_umulh diff --git a/runtime/powerpc/i64_umul.s b/runtime/powerpc/i64_umul.s deleted file mode 100644 index e734b93c..00000000 --- a/runtime/powerpc/i64_umul.s +++ /dev/null @@ -1,64 +0,0 @@ -# ***************************************************************** -# -# The Compcert verified compiler -# -# Xavier Leroy, INRIA Paris -# -# Copyright (c) 2016 Institut National de Recherche en Informatique et -# en Automatique. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# * Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# * Neither the name of the nor the -# names of its contributors may be used to endorse or promote products -# derived from this software without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING -# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -# -# ********************************************************************* - -# Helper functions for 64-bit integer arithmetic. PowerPC version. - - .text - -# Unsigned multiply high - -# Reference C implementation in ../c/i64_umul.c - - .balign 16 - .globl __i64_umulh -__i64_umulh: - # u1 in r3; u0 in r4; v1 in r5; v0 in r6 - mulhwu r0, r4, r6 # k (in r0) = high((u64) u0 * (u64) v0) - mullw r8, r3, r6 - mulhwu r7, r3, r6 # t (in r8:r7) = (u64) u1 * (u64) v0 - addc r0, r8, r0 # w1 (in r0) = low (t + k) - addze r9, r7 # w2 (in r9) = high (t + k) - mullw r8, r4, r5 - mulhwu r7, r4, r5 # t (in r8:r7) = (u64) u0 * (u64) v1 - addc r0, r8, r0 # tmp (in r0) = low (t + w1) - addze r0, r7 # k (in r0) = high(t + w1) - mullw r8, r3, r5 - mulhwu r7, r3, r5 # t (in r8:r7) = (u64) u1 * (u64) v1 - addc r4, r8, r9 # add w2 - addze r3, r7 - addc r4, r4, r0 # add k - addze r3, r3 - blr - .type __i64_umulh, @function - .size __i64_umulh, .-__i64_umulh -- cgit