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Diffstat (limited to 'runtime/powerpc/i64_ucmp.s')
| -rw-r--r-- | runtime/powerpc/i64_ucmp.s | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/runtime/powerpc/i64_ucmp.s b/runtime/powerpc/i64_ucmp.s deleted file mode 100644 index 708bc74..0000000 --- a/runtime/powerpc/i64_ucmp.s +++ /dev/null @@ -1,72 +0,0 @@ -# ***************************************************************** -# -# The Compcert verified compiler -# -# Xavier Leroy, INRIA Paris-Rocquencourt -# -# Copyright (c) 2013 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 <organization> 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 <COPYRIGHT -# HOLDER> 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 comparison - - .balign 16 - .globl __i64_ucmp -__i64_ucmp: - cmplw cr0, r3, r5 # compare high words (unsigned) - cmplw cr1, r4, r6 # compare low words (unsigned) - mfcr r0 -# At this point, the bits of r0 are as follow: -# bit 31: XH < YH -# bit 30: XH > YH -# bit 27: XL > YL -# bit 26: XL < YL - rlwinm r3, r0, 0, 0, 1 # r3 = r0 & 0xC000_0000 - srawi r3, r3, 24 # r4 = r4 >>s 28 -# r3 = -0x80 if XH < YH -# = 0x40 if XH > YH -# = 0 if XH = YH - rlwinm r4, r0, 4, 0, 1 # r4 = (r0 << 4) & 0xC000_0000 - srawi r4, r4, 28 # r4 = r4 >>s 28 -# r4 = -8 if XL < YL -# = 4 if XL > YL -# = 0 if XL = YL - add r3, r3, r4 -# r3 = -0x80 or -0x80 - 8 or -0x80 + 4 or -8 if X < Y -# (in all cases, r3 < 0 if X < Y) -# = 0x40 or 0x40 - 8 or 0x40 + 4 or 4 if X > Y -# (in all cases, r3 > 0 if X > Y) -# = 0 if X = Y - blr - .type __i64_ucmp, @function - .size __i64_ucmp, .-__i64_ucmp - -
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