From 5c2a362cb79d9aaf5fc69cf05a56d67d98f8b737 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Sun, 21 Jun 2009 22:50:33 -0700 Subject: ARM: Move util functions out of the isa desc. --- src/arch/arm/isa/util.isa | 271 ---------------------------------------------- 1 file changed, 271 deletions(-) delete mode 100644 src/arch/arm/isa/util.isa (limited to 'src/arch/arm/isa/util.isa') diff --git a/src/arch/arm/isa/util.isa b/src/arch/arm/isa/util.isa deleted file mode 100644 index b36206d2a..000000000 --- a/src/arch/arm/isa/util.isa +++ /dev/null @@ -1,271 +0,0 @@ -// -*- mode:c++ -*- - -// Copyright (c) 2007-2008 The Florida State University -// All rights reserved. -// -// 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 copyright holders 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 THE COPYRIGHT -// OWNER OR CONTRIBUTORS 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. -// -// Authors: Stephen Hines - -//////////////////////////////////////////////////////////////////// -// -// Utility functions for execute methods -// -// -output header {{ - - // Shift types for ARM instructions - enum ArmShiftType { - LSL = 0, - LSR, - ASR, - ROR - }; - - enum ArmShiftMode { - }; - -}}; - -output exec {{ - - static int32_t arm_NEG(int32_t val) { return (val >> 31); } - static int32_t arm_POS(int32_t val) { return ((~val) >> 31); } - - // Shift Rm by an immediate value - inline int32_t - shift_rm_imm(uint32_t base, uint32_t shamt, uint32_t type, uint32_t cfval) - { - enum ArmShiftType shiftType; - shiftType = (enum ArmShiftType) type; - - switch (shiftType) - { - case LSL: - return (base << shamt); - case LSR: - if (shamt == 0) - return (0); - else - return (base >> shamt); - case ASR: - if (shamt == 0) - return ((uint32_t) ((int32_t) base >> 31L)); - else - return ((uint32_t) (((int32_t) base) >> shamt)); - case ROR: - //shamt = shamt & 0x1f; - if (shamt == 0) - return (cfval << 31) | (base >> 1); // RRX - else - return (base << (32 - shamt)) | (base >> shamt); - default: - fprintf(stderr, "Unhandled shift type\n"); - exit(1); - break; - } - return 0; - } - - // Shift Rm by Rs - inline int32_t - shift_rm_rs(uint32_t base, uint32_t shamt, uint32_t type, uint32_t cfval) - { - enum ArmShiftType shiftType; - shiftType = (enum ArmShiftType) type; - - switch (shiftType) - { - case LSL: - if (shamt == 0) - return (base); - else if (shamt >= 32) - return (0); - else - return (base << shamt); - case LSR: - if (shamt == 0) - return (base); - else if (shamt >= 32) - return (0); - else - return (base >> shamt); - case ASR: - if (shamt == 0) - return base; - else if (shamt >= 32) - return ((uint32_t) ((int32_t) base >> 31L)); - else - return ((uint32_t) (((int32_t) base) >> (int) shamt)); - case ROR: - shamt = shamt & 0x1f; - if (shamt == 0) - return (base); - else - return ((base << (32 - shamt)) | (base >> shamt)); - default: - fprintf(stderr, "Unhandled shift type\n"); - exit(1); - break; - } - return 0; - } - - - // Generate C for a shift by immediate - inline int32_t - shift_carry_imm(uint32_t base, uint32_t shamt, uint32_t type, - uint32_t cfval) - { - enum ArmShiftType shiftType; - shiftType = (enum ArmShiftType) type; - - switch (shiftType) - { - case LSL: - return (base >> (32 - shamt)) & 1; - case LSR: - if (shamt == 0) - return (base >> 31) & 1; - else - return (base >> (shamt - 1)) & 1; - case ASR: - if (shamt == 0) - return (base >> 31L); - else - return ((uint32_t) (((int32_t) base) >> (shamt - 1))) & 1; - case ROR: - shamt = shamt & 0x1f; - if (shamt == 0) - return (base & 1); // RRX - else - return (base >> (shamt - 1)) & 1; - default: - fprintf(stderr, "Unhandled shift type\n"); - exit(1); - break; - - } - return 0; - } - - - // Generate C for a shift by Rs - inline int32_t - shift_carry_rs(uint32_t base, uint32_t shamt, uint32_t type, uint32_t cfval) - { - enum ArmShiftType shiftType; - shiftType = (enum ArmShiftType) type; - - switch (shiftType) - { - case LSL: - if (shamt == 0) - return (!!cfval); - else if (shamt == 32) - return (base & 1); - else if (shamt > 32) - return (0); - else - return ((base >> (32 - shamt)) & 1); - case LSR: - if (shamt == 0) - return (!!cfval); - else if (shamt == 32) - return (base >> 31); - else if (shamt > 32) - return (0); - else - return ((base >> (shamt - 1)) & 1); - case ASR: - if (shamt == 0) - return (!!cfval); - else if (shamt >= 32) - return (base >> 31L); - else - return (((uint32_t) (((int32_t) base) >> (shamt - 1))) & 1); - case ROR: - if (shamt == 0) - return (!!cfval); - shamt = shamt & 0x1f; - if (shamt == 0) - return (base >> 31); // RRX - else - return ((base >> (shamt - 1)) & 1); - default: - fprintf(stderr, "Unhandled shift type\n"); - exit(1); - break; - - } - return 0; - } - - - // Generate the appropriate carry bit for an addition operation - inline int32_t - arm_add_carry(int32_t result, int32_t lhs, int32_t rhs) - { - if ((lhs | rhs) >> 30) - return ((arm_NEG(lhs) && arm_NEG(rhs)) || - (arm_NEG(lhs) && arm_POS(result)) || - (arm_NEG(rhs) && arm_POS(result))); - - return 0; - } - - // Generate the appropriate carry bit for a subtraction operation - inline int32_t - arm_sub_carry(int32_t result, int32_t lhs, int32_t rhs) - { - if ((lhs >= rhs) || ((rhs | lhs) >> 31)) - return ((arm_NEG(lhs) && arm_POS(rhs)) || - (arm_NEG(lhs) && arm_POS(result)) || - (arm_POS(rhs) && arm_POS(result))); - - return 0; - } - - inline int32_t - arm_add_overflow(int32_t result, int32_t lhs, int32_t rhs) - { - if ((lhs | rhs) >> 30) - return ((arm_NEG(lhs) && arm_NEG(rhs) && arm_POS(result)) || - (arm_POS(lhs) && arm_POS(rhs) && arm_NEG(result))); - - return 0; - } - - inline int32_t - arm_sub_overflow(int32_t result, int32_t lhs, int32_t rhs) - { - if ((lhs >= rhs) || ((rhs | lhs) >> 31)) - return ((arm_NEG(lhs) && arm_POS(rhs) && arm_POS(result)) || - (arm_POS(lhs) && arm_NEG(rhs) && arm_NEG(result))); - - return 0; - } - -}}; - -- cgit v1.2.3