146 lines
4.3 KiB
C
146 lines
4.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/chibicc/chibicc.h"
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/**
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* @fileoverview __builtin_fpclassify() implementation
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*/
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#define FPCLASSIFY_FLOAT \
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"\tmovaps\t%%xmm0,%%xmm1\n\
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\tmov\t$0x7fffffff,%%eax\n\
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\tmovd\t%%eax,%%xmm2\n\
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\tandps\t%%xmm2,%%xmm1\n\
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\tmov\t$%d,%%eax\n\
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\tucomiss\t%%xmm1,%%xmm1\n\
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\tjp\t9f\n\
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\tmov\t$0x7f7fffff,%%edi\n\
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\tmovd\t%%edi,%%xmm2\n\
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\tucomiss\t%%xmm2,%%xmm1\n\
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\tja\t2f\n\
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\tmov\t$0x00800000,%%edi\n\
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\tmovd\t%%edi,%%xmm2\n\
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\tucomiss\t%%xmm2,%%xmm1\n\
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\tjnb\t3f\n\
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\txorps\t%%xmm1,%%xmm1\n\
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\tucomiss\t%%xmm1,%%xmm0\n\
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\tjp\t1f\n\
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\tmovl\t$%d,%%eax\n\
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\tje\t9f\n\
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1:\tmovl\t$%d,%%eax\n\
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\tjmp\t9f\n\
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2:\tmovl\t$%d,%%eax\n\
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\tjmp\t9f\n\
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3:\tmovl\t$%d,%%eax\n\
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9:"
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#define FPCLASSIFY_DOUBLE \
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"\tmovapd\t%%xmm0,%%xmm1\n\
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\tmov\t$0x7fffffffffffffff,%%rax\n\
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\tmovq\t%%rax,%%xmm2\n\
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\tandps\t%%xmm2,%%xmm1\n\
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\tmov\t$%d,%%eax\n\
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\tucomisd\t%%xmm1,%%xmm1\n\
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\tjp\t9f\n\
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\tmov\t$0x7fefffffffffffff,%%rdi\n\
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\tmovq\t%%rdi,%%xmm2\n\
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\tucomisd\t%%xmm2,%%xmm1\n\
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\tja\t2f\n\
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\tmov\t$0x0010000000000000,%%rdi\n\
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\tmovq\t%%rdi,%%xmm2\n\
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\tucomisd\t%%xmm2,%%xmm1\n\
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\tjnb\t3f\n\
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\txorps\t%%xmm1,%%xmm1\n\
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\tucomisd\t%%xmm1,%%xmm0\n\
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\tjp\t1f\n\
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\tmovl\t$%d,%%eax\n\
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\tje\t9f\n\
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1:\tmovl\t$%d,%%eax\n\
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\tjmp\t9f\n\
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2:\tmovl\t$%d,%%eax\n\
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\tjmp\t9f\n\
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3:\tmovl\t$%d,%%eax\n\
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9:"
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#define FPCLASSIFY_LDOUBLE \
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"\tmov\t$%d,%%eax\n\
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\tfld\t%%st\n\
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\tfabs\n\
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\tfucomi\t%%st,%%st\n\
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\tjp\t6f\n\
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\tpush\t$0x7ffe\n\
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\tpush\t$-1\n\
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\tfldt\t(%%rsp)\n\
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\tadd\t$16,%%rsp\n\
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\tfxch\n\
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\tmov\t$%d,%%eax\n\
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\tfucomi\n\
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\tfstp\t%%st(1)\n\
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\tja\t7f\n\
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\tmov\t$1,%%edi\n\
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\tpush\t%%rdi\n\
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\tror\t%%rdi\n\
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\tpush\t%%rdi\n\
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\tfldt\t(%%rsp)\n\
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\tadd\t$16,%%rsp\n\
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\tfxch\n\
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\tmov\t$%d,%%eax\n\
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\tfucomip\n\
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\tfstp\t%%st\n\
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\tjnb\t8f\n\
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\tfldz\n\
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\tfxch\n\
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\tfucomip\n\
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\tfstp\t%%st\n\
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\tjp\t5f\n\
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\tmov\t$%d,%%eax\n\
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\tje\t9f\n\
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5:\tmov\t$%d,%%eax\n\
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\tjmp\t9f\n\
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6:\tfstp\t%%st\n\
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\tfstp\t%%st\n\
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\tjmp\t9f\n\
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7:\tfstp\t%%st\n\
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\tfstp\t%%st\n\
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\tjmp\t9f\n\
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8:\tfstp\t%%st\n\
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9:"
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void gen_fpclassify(FpClassify *fpc) {
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int fpnan = fpc->args[0];
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int fpinf = fpc->args[1];
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int fpnorm = fpc->args[2];
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int fpsubnorm = fpc->args[3];
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int fpzero = fpc->args[4];
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gen_expr(fpc->node);
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switch (fpc->node->ty->kind) {
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case TY_FLOAT:
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println(FPCLASSIFY_FLOAT, fpnan, fpzero, fpsubnorm, fpinf, fpnorm);
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break;
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case TY_DOUBLE:
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println(FPCLASSIFY_DOUBLE, fpnan, fpzero, fpsubnorm, fpinf, fpnorm);
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break;
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case TY_LDOUBLE:
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println(FPCLASSIFY_LDOUBLE, fpnan, fpinf, fpnorm, fpzero, fpsubnorm);
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break;
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default:
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UNREACHABLE();
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}
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}
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