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Diffstat (limited to 'runtime/powerpc/i64_dtos.s')
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diff --git a/runtime/powerpc/i64_dtos.s b/runtime/powerpc/i64_dtos.s deleted file mode 100644 index 85c60b27..00000000 --- a/runtime/powerpc/i64_dtos.s +++ /dev/null @@ -1,100 +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 - -### Conversion from double float to signed long - - .balign 16 - .globl __compcert_i64_dtos -__compcert_i64_dtos: - stfdu f1, -16(r1) # extract LO (r4) and HI (r3) halves of double - lwz r3, 0(r1) - lwz r4, 4(r1) - addi r1, r1, 16 - srawi r10, r3, 31 # save sign of double in r10 - # extract unbiased exponent ((HI & 0x7FF00000) >> 20) - (1023 + 52) - rlwinm r5, r3, 12, 21, 31 - addi r5, r5, -1075 - # check range of exponent - cmpwi r5, -52 # if EXP < -52, abs(double) is < 1.0 - blt 1f - cmpwi r5, 11 # if EXP >= 63 - 52, abs(double) is >= 2^63 - bge 2f - # extract true mantissa - rlwinm r3, r3, 0, 12, 31 # HI &= ~0xFFF00000 - oris r3, r3, 0x10 # HI |= 0x00100000 - # shift it appropriately - cmpwi r5, 0 - blt 3f - # if EXP >= 0, shift left by EXP. Note that EXP < 11. - subfic r6, r5, 32 # r6 = 32 - EXP - slw r3, r3, r5 - srw r0, r4, r6 - or r3, r3, r0 - slw r4, r4, r5 - b 4f - # if EXP < 0, shift right by -EXP. Note that -EXP <= 52 but can be >= 32. -3: subfic r5, r5, 0 # r5 = -EXP = shift amount - subfic r6, r5, 32 # r6 = 32 - amount - addi r7, r5, -32 # r7 = amount - 32 (see i64_shr.s) - srw r4, r4, r5 - slw r0, r3, r6 - or r4, r4, r0 - srw r0, r3, r7 - or r4, r4, r0 - srw r3, r3, r5 - # apply sign to result -4: xor r4, r4, r10 - xor r3, r3, r10 - subfc r4, r10, r4 - subfe r3, r10, r3 - blr - # Special cases -1: li r3, 0 # result is 0 - li r4, 0 - blr -2: li r4, -1 # result is MAX_SINT or MIN_SINT - bge 5f # depending on sign - li r4, -1 # result is MAX_SINT = 0x7FFF_FFFF - srwi r3, r4, 1 - blr -5: lis r3, 0x8000 # result is MIN_SINT = 0x8000_0000 - li r4, 0 - blr - .type __compcert_i64_dtos, @function - .size __compcert_i64_dtos, .-__compcert_i64_dtos -
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