diff options
Diffstat (limited to 'gcc/config/picochip/libgccExtras/udivmodsi4.asm')
| -rw-r--r-- | gcc/config/picochip/libgccExtras/udivmodsi4.asm | 318 |
1 files changed, 0 insertions, 318 deletions
diff --git a/gcc/config/picochip/libgccExtras/udivmodsi4.asm b/gcc/config/picochip/libgccExtras/udivmodsi4.asm deleted file mode 100644 index 92c2a4983ce..00000000000 --- a/gcc/config/picochip/libgccExtras/udivmodsi4.asm +++ /dev/null @@ -1,318 +0,0 @@ -// picoChip ASM file -// -// Support for 32-bit unsigned division/modulus. -// -// Copyright (C) 2003, 2004, 2005, 2008, 2009 Free Software Foundation, Inc. -// Contributed by Picochip Ltd. -// Maintained by Daniel Towner (daniel.towner@picochip.com) -// -// This file is free software; you can redistribute it and/or modify it -// under the terms of the GNU General Public License as published by the -// Free Software Foundation; either version 3, or (at your option) any -// later version. -// -// This file 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 for more details. -// -// Under Section 7 of GPL version 3, you are granted additional -// permissions described in the GCC Runtime Library Exception, version -// 3.1, as published by the Free Software Foundation. -// -// You should have received a copy of the GNU General Public License and -// a copy of the GCC Runtime Library Exception along with this program; -// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -// <http://www.gnu.org/licenses/>. - -.section .text - -.align 8 -.global __udivmodsi4 -__udivmodsi4: -_picoMark_FUNCTION_BEGIN= -// picoChip Function Prologue : &__udivmodsi4 = 24 bytes - - // Schedule the register saves alongside the special cases, so that - // if the special cases fail, the registers will have already - // been stored onto the stack. - SUB.0 R3,R1,r15 \ STL R[13:12],(FP)-1 - BHS skipCommonCase \ STL R[9:8],(FP)-4 -=-> SUB.0 R2,1,r15 \ STL R[11:10],(FP)-3 - -_L2: - // Flags set above, and in _L2 caller. - BNE restOfCode -=-> SUB.0 R3,0,r15 - BNE restOfCode -=-> COPY.0 R0,R4 \ COPY.1 R1,R5 - JR (R12) // Return to caller -=-> COPY.0 0,R6 \ COPY.1 0,R7 - // Never reach here - -skipCommonCase: - SUB.0 R3,R1,r15 - BNE _L3 // (Reversed branch) -=-> SUB.0 R2,R0,r15 // Must be set in delay slot, so ready by _L9 - -_L9: - BLO _L2 // (Reversed branch) -=-> SUB.0 R2,1,r15 - -_L3: - SUB.0 R2,R0,r15 - BEQ _L10 // (Reversed branch) -=-> SUB.0 R1,R3,r15 // Set flags for branch at _L10 - -_L4: - // greater than - COPY.0 0,R4 \ COPY.1 0,R5 \ JR (R12) // Return to caller -=-> COPY.0 R0,R6 \ COPY.1 R1,R7 - // Doesn't reach here. - -_L10: - // Flags set in _L10 call delay slot. - BNE _L4 -=-> COPY.0 1,R4 \ COPY.1 0,R5 - JR (R12) // Return to caller -=-> COPY.0 0,R6 \ COPY.1 0,R7 - -restOfCode: - -// Prologue - - // Register saves scheduled alongside special cases above. - ADD.0 FP,-20,FP \ STW R14,(FP)-4 - - // The following can be scheduled together. - // dividend in R[9:8] (from R[1:0]) - // divisor in R[7:6] (from R[3:2]) - // R14 := clzsi2 (dividend) - // R0 := clzsi2 (divisor) - JL (&__clzsi2) \ COPY.0 R0,R8 \ COPY.1 R1,R9 -=-> COPY.0 R2,R6 \ COPY.1 R3,R7 - COPY.0 R0,R14 \ JL (&__clzsi2) -=-> COPY.0 R6,R0 \ COPY.1 R7,R1 - - // R14 := R0 - R14 - SUB.0 R0,R14,R14 - - ADD.0 R14,1,R0 // R0 := R14 + 1 (HI) - - // R[11:10] = R[7,6] << R14 - SUB.0 15,R14,r15 - LSL.0 R6,R14,R11 \ BLT setupDivstepLoop -=-> SUB.0 0,R14,R4 \ COPY.1 0,R10 - - // Zero shift is a special case. Shifting by zero within a 16-bit - // source object is fine, but don't execute the OR of the right-shift - // into the final result. - LSL.0 R7,R14,R11 \ BEQ setupDivstepLoop -=-> LSL.0 R6,R14,R10 - - LSR.0 R6,R4,R4 - OR.0 R11,R4,R11 - -setupDivstepLoop: - - // R[5:4] := R[9:8] (SI) - COPY.0 R8,R4 \ COPY.1 R9,R5 - COPY.0 0,R6 \ COPY.1 R0,R8 - - // Store original value of loopCount for use after the loop. - // The Subtraction is handled in the tail of the loop iteration - // after this point. - SUB.0 R4,R10,R0 \ COPY.1 R8,R14 - - // workingResult in R4,5,6 - // temps in r0,1,2 and r7 - // alignedDivisor in R10,11 - // loopCount in r8 - // r3, r9 scratch, used for renaming. - -loopStart: - // R0 := R4 - zeroExtend (R10) - only need 33-bits (i.e., 48-bits) - SUBB.0 R5,R11,R1 \ LSR.1 R0,15,R3 - SUBB.0 R6,0,R2 \ LSR.1 R1,15,R6 - - // if (carry) goto shiftOnly - SUB.0 R8,1,R8 \ BNE shiftOnly -=-> LSR.0 R4,15,R7 \ LSL.1 R1,1,R9 - - OR.0 [LSL R0,1],1,R4 \ BNE loopStart -=-> SUB.0 R4,R10,R0 \ OR.1 R9,R3,R5 - - BRA loopEnd - -shiftOnly: - - OR.0 [LSL R5,1],R7,R5 \ BNE loopStart \ LSR.1 R5,15,R6 -=-> SUB.0 [LSL R4,1],R10,R0 \LSL.1 R4,1,R4 - -// End of loop -loopEnd: - - // Schedule the computation of the upper word after shifting - // alongside the decision over whether to branch, and the register - // restores. - // R10 is filled with a useful constant. - SUB.0 15,r14,r15 \ LDL (FP)4,R[13:12] - SUB.1 0,R14,R1 // Don't set flags! - LSL.0 R6,R1,R3 \ LDL (FP)-4,R[9:8] - - BLT remainderHasMoreThan16Bits \ LSR.0 R5,R14,R7 \ COPY.1 -1,R10 -=-> LSL.0 R5,R1,R2 \ OR.1 R7,R3,R3 - - LSR.0 R4,R14,R3 \ COPY.1 R3,R7 - BRA epilogue \ LSR.0 -1,R1,R0 \ COPY.1 0,R5 -=-> OR.0 R3,R2,R6 \ AND.1 R0,R4,R4 - -remainderHasMoreThan16Bits: - - LSL.0 R10,R14,R1 \ COPY.1 R3,R6 - XOR.0 R10,R1,R1 \ COPY.1 0,R7 - AND.0 R1,R5,R5 - -epilogue: - - JR (R12) \ LDW (FP)-4,R14 -=-> LDL (FP)-3,R[11:10] - -_picoMark_FUNCTION_END= - -// picoChip Function Epilogue : udivmodsi4 - -//============================================================================ -// All DWARF information between this marker, and the END OF DWARF -// marker should be included in the source file. Search for -// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and -// provide the relevent information. Add markers called -// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the -// function in question. -//============================================================================ - -//============================================================================ -// Frame information. -//============================================================================ - -.section .debug_frame -_picoMark_DebugFrame= - -// Common CIE header. -.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin -_picoMark_CieBegin= -.unalignedInitLong 0xffffffff -.initByte 0x1 // CIE Version -.ascii 16#0# // CIE Augmentation -.uleb128 0x1 // CIE Code Alignment Factor -.sleb128 2 // CIE Data Alignment Factor -.initByte 0xc // CIE RA Column -.initByte 0xc // DW_CFA_def_cfa -.uleb128 0xd -.uleb128 0x0 -.align 2 -_picoMark_CieEnd= - -// FDE -_picoMark_LSFDE0I900821033007563= -.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin -_picoMark_FdeBegin= -.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset -.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location -.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN -.initByte 0xe // DW_CFA_def_cfa_offset -.uleb128 0x18 // <-- FUNCTION_STACK_SIZE_GOES_HERE -.initByte 0x4 // DW_CFA_advance_loc4 -.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN -.initByte 0xe // DW_CFA_def_cfa_offset -.uleb128 0x0 -.align 2 -_picoMark_FdeEnd= - -//============================================================================ -// Abbrevation information. -//============================================================================ - -.section .debug_abbrev -_picoMark_ABBREVIATIONS= - -.section .debug_abbrev - .uleb128 0x1 // (abbrev code) - .uleb128 0x11 // (TAG: DW_TAG_compile_unit) - .initByte 0x1 // DW_children_yes - .uleb128 0x10 // (DW_AT_stmt_list) - .uleb128 0x6 // (DW_FORM_data4) - .uleb128 0x12 // (DW_AT_high_pc) - .uleb128 0x1 // (DW_FORM_addr) - .uleb128 0x11 // (DW_AT_low_pc) - .uleb128 0x1 // (DW_FORM_addr) - .uleb128 0x25 // (DW_AT_producer) - .uleb128 0x8 // (DW_FORM_string) - .uleb128 0x13 // (DW_AT_language) - .uleb128 0x5 // (DW_FORM_data2) - .uleb128 0x3 // (DW_AT_name) - .uleb128 0x8 // (DW_FORM_string) -.initByte 0x0 -.initByte 0x0 - - .uleb128 0x2 ;# (abbrev code) - .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) -.initByte 0x0 ;# DW_children_no - .uleb128 0x3 ;# (DW_AT_name) - .uleb128 0x8 ;# (DW_FORM_string) - .uleb128 0x11 ;# (DW_AT_low_pc) - .uleb128 0x1 ;# (DW_FORM_addr) - .uleb128 0x12 ;# (DW_AT_high_pc) - .uleb128 0x1 ;# (DW_FORM_addr) -.initByte 0x0 -.initByte 0x0 - -.initByte 0x0 - -//============================================================================ -// Line information. DwarfLib requires this to be present, but it can -// be empty. -//============================================================================ - -.section .debug_line -_picoMark_LINES= - -//============================================================================ -// Debug Information -//============================================================================ -.section .debug_info - -//Fixed header. -.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN -_picoMark_DEBUG_INFO_BEGIN= -.unalignedInitWord 0x2 -.unalignedInitLong _picoMark_ABBREVIATIONS -.initByte 0x2 - -// Compile unit information. -.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) -.unalignedInitLong _picoMark_LINES -.unalignedInitWord _picoMark_FUNCTION_END -.unalignedInitWord _picoMark_FUNCTION_BEGIN -// Producer is `picoChip' -.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# -.unalignedInitWord 0xcafe // ASM language -.ascii 16#0# // Name. DwarfLib expects this to be present. - -.uleb128 0x2 ;# (DIE DW_TAG_subprogram) - -// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex -// digit is specified using the format 16#XX# -.ascii 16#5f# 16#75# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#73# 16#69# 16#34# 16#0# // Function name `_udivmodsi4' -.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc -.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc - -.initByte 0x0 // end of compile unit children. - -_picoMark_DEBUG_INFO_END= - -//============================================================================ -// END OF DWARF -//============================================================================ -.section .endFile -// End of picoChip ASM file |
