Mercurial > hg > graal-compiler
view src/cpu/sparc/vm/args.cc @ 6084:6759698e3140
7133857: exp() and pow() should use the x87 ISA on x86
Summary: use x87 instructions to implement exp() and pow() in interpreter/c1/c2.
Reviewed-by: kvn, never, twisti
author | roland |
---|---|
date | Tue, 15 May 2012 10:10:23 +0200 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2002, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include <stdio.h> #include <string.h> static const int R_O0_num = 1000; static const int R_I0_num = 2000; static const int R_F0_num = 3000; static const int R_F1_num = R_F0_num + 1; static const int R_F2_num = R_F0_num + 2; static const int STACK_num= 4000; static bool LP64 = false; static bool LONGS_IN_ONE_ENTRY = false; static const int Op_RegI = 'I'; static const int Op_RegP = 'P'; static const int Op_RegF = 'F'; static const int Op_RegD = 'D'; static const int Op_RegL = 'L'; static const int SPARC_ARGS_IN_REGS_NUM=6; static void print_reg( int reg ) { if( reg == 0 ) printf("__"); // halve's else if( reg >= STACK_num && reg < STACK_num+100 ) printf("S%d_",reg - STACK_num); else if( reg >= R_F0_num && reg < R_F0_num+100 ) printf("F%d_",reg - R_F0_num); else if( reg >= R_O0_num && reg < R_O0_num+100 ) { if( LONGS_IN_ONE_ENTRY ) { reg -= R_O0_num; printf("O%d",reg>>1); printf(reg&1 ? "H" : "L"); } else printf("O%d_",reg - R_O0_num); } else printf("Wretched: %d\n", reg); } static void print_convention( int *sig, const char *s, int length ) { // Print it out for( int i = 0; i < length; i++) { if( sig[i] == 0 ) continue; // do not print 'halves' print_reg( sig[i] & 0xFFFF ); int reg = sig[i] >> 16; if( reg ) { printf(":"); print_reg( reg ); } else { printf(" "); } printf(" "); } printf("\n"); } static int INT_SCALE( int x ) { return LONGS_IN_ONE_ENTRY ? (x<<1) : x; } static void java_convention( int *sig, const char *s, int length ) { if( LP64 && !LONGS_IN_ONE_ENTRY ) { printf("LP64 and 2-reg longs not supported\n"); return; } for( int i = 0; i < length; i++ ) sig[i] = s[i]; // Reset sig array bool is_outgoing = true; int int_base = (is_outgoing ? R_O0_num : R_I0_num); // Convention is to pack the first 6 int/oop args into the first 6 // registers (I0-I5), extras spill to the stack. Then pack the first // 32 float args into F0-F31, extras spill to the stack. Then pad // all register sets to align. Then put longs and doubles into the // same registers as they fit, else spill to the stack. int int_reg_max = SPARC_ARGS_IN_REGS_NUM; int flt_reg_max = 32; // Count int/oop and float args. See how many stack slots we'll need // and where the longs & doubles will go. int int_reg_cnt = 0; int flt_reg_cnt = 0; int stk_reg_pairs = 0; for( int i = 0; i < length; i++) { switch( sig[i] ) { case Op_RegL: // Longs-in-1-reg compete with int args if( LONGS_IN_ONE_ENTRY ) { if( int_reg_cnt < int_reg_max ) int_reg_cnt++; } break; case Op_RegP: if( int_reg_cnt < int_reg_max ) int_reg_cnt++; else if( !LP64 ) stk_reg_pairs++; break; case Op_RegI: if( int_reg_cnt < int_reg_max ) int_reg_cnt++; else stk_reg_pairs++; break; case Op_RegF: if( flt_reg_cnt < flt_reg_max ) flt_reg_cnt++; else stk_reg_pairs++; break; } } // This is where the longs/doubles start on the stack. stk_reg_pairs = (stk_reg_pairs+1) & ~1; // Round int int_reg_pairs = (int_reg_cnt+1) & ~1; // 32-bit 2-reg longs only int flt_reg_pairs = (flt_reg_cnt+1) & ~1; int stk_reg = 0; int int_reg = 0; int flt_reg = 0; // Now do the signature layout for( int i = 0; i < length; i++) { int tmp = sig[i]; if( tmp == Op_RegP ) tmp = LP64 ? Op_RegL : Op_RegI; // Treat ptrs and ints or long accordingly switch( tmp ) { case Op_RegI: // case Op_RegP: if( int_reg < int_reg_max) tmp = INT_SCALE(int_reg++) + int_base; else tmp = STACK_num + stk_reg++; sig[i] = tmp; break; case Op_RegL: if( sig[i] != Op_RegP && sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; } // case Op_RegP: if( LONGS_IN_ONE_ENTRY ) { if( int_reg < int_reg_max ) { tmp = INT_SCALE(int_reg++) + int_base; } else { tmp = STACK_num + stk_reg_pairs; stk_reg_pairs += 2; } } else { if( int_reg_pairs < int_reg_max ) { tmp = int_reg_pairs + int_base; int_reg_pairs += 2; } else { tmp = STACK_num + stk_reg_pairs; stk_reg_pairs += 2; } } sig[i] = tmp | (tmp+1)<<16; // Smear to pair break; case Op_RegF: sig[i] = (flt_reg < flt_reg_max) ? (R_F0_num + flt_reg++) : STACK_num + stk_reg++; break; case Op_RegD: if( sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; } if( flt_reg_pairs < flt_reg_max ) { tmp = R_F0_num + flt_reg_pairs; flt_reg_pairs += 2; } else { tmp = STACK_num + stk_reg_pairs; stk_reg_pairs += 2; } sig[i] = tmp | (tmp+1)<<16; // Smear to pair break; case 'h': sig[i] = 0; break; default: printf("Bad character: %c\n", sig[i] ); return; } } printf("java "); printf(LP64 ? "LP64 " : "LP32 "); printf(LONGS_IN_ONE_ENTRY ? "long1: " : "long2: "); print_convention(sig,s,length); } static int int_stk_helper( int i ) { if( i < 6 ) return R_O0_num + (LONGS_IN_ONE_ENTRY ? i<<1 : i); else return STACK_num + (LP64 ? i<<1 : i); } static void native_convention( int *sig, const char *s, int length ) { if( LP64 && !LONGS_IN_ONE_ENTRY ) { printf("LP64 and 2-reg longs not supported\n"); return; } for( int i = 0; i < length; i++ ) sig[i] = s[i]; // Reset sig array // The native convention is V8 if !LP64, which means the V8 convention is // used both with and without LONGS_IN_ONE_ENTRY, an unfortunate split. The // same actual machine registers are used, but they are named differently in // the LONGS_IN_ONE_ENTRY mode. The LP64 convention is the V9 convention // which is slightly more sane. if( LP64 ) { // V9 convention: All things "as-if" on double-wide stack slots. // Hoist any int/ptr/long's in the first 6 to int regs. // Hoist any flt/dbl's in the first 16 dbl regs. int j = 0; // Count of actual args, not HALVES for( int i=0; i<length; i++, j++ ) { int tmp; switch( sig[i] ) { case Op_RegI: sig[i] = int_stk_helper( j ); break; case Op_RegL: if( sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; } case Op_RegP: tmp = int_stk_helper( j ); sig[i] = tmp | ((tmp+1) << 16); // Smear to pair break; case Op_RegF: // V9ism: floats go in ODD registers sig[i] = ((j < 16) ? R_F1_num : (STACK_num + 1)) + (j<<1); break; case Op_RegD: // V9ism: doubles go in EVEN/ODD regs tmp = ((j < 16) ? R_F0_num : STACK_num) + (j<<1); sig[i] = tmp | ((tmp+1) << 16); // Smear to pair break; case 'h': sig[i] = 0; j--; break; // Do not count HALVES default: printf("Bad character: %c\n", sig[i] ); return; } } } else { // V8 convention: first 6 things in O-regs, rest on stack. // Alignment is willy-nilly. for( int i=0; i<length; i++ ) { int tmp; switch( sig[i] ) { case Op_RegI: case Op_RegP: case Op_RegF: sig[i] = int_stk_helper( i ); break; case Op_RegL: case Op_RegD: if( sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; } tmp = int_stk_helper( i ); sig[i] = tmp | (int_stk_helper( i+1 ) << 16); break; case 'h': sig[i] = 0; break; default: printf("Bad character: %c\n", sig[i] ); return; } } } printf("natv "); printf(LP64 ? "LP64 " : "LP32 "); printf(LONGS_IN_ONE_ENTRY ? "long1: " : "long2: "); print_convention(sig,s,length); } int main( int argc, char **argv ) { if( argc != 2 ) { printf("Usage: args IPFLhDh... (Java argument string)\n"); printf("Returns argument layout\n"); return -1; } const char *s = argv[1]; int length = strlen(s); int sig[1000]; LP64 = false; LONGS_IN_ONE_ENTRY = false; java_convention( sig, s, length ); LP64 = false; LONGS_IN_ONE_ENTRY = true; java_convention( sig, s, length ); LP64 = true ; LONGS_IN_ONE_ENTRY = true; java_convention( sig, s, length ); LP64 = false; LONGS_IN_ONE_ENTRY = false; native_convention( sig, s, length ); LP64 = false; LONGS_IN_ONE_ENTRY = true; native_convention( sig, s, length ); LP64 = true ; LONGS_IN_ONE_ENTRY = true; native_convention( sig, s, length ); }