diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/m68k/fpsp040/x_fline.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/m68k/fpsp040/x_fline.S | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/ANDROID_3.4.5/arch/m68k/fpsp040/x_fline.S b/ANDROID_3.4.5/arch/m68k/fpsp040/x_fline.S deleted file mode 100644 index 264e126d..00000000 --- a/ANDROID_3.4.5/arch/m68k/fpsp040/x_fline.S +++ /dev/null @@ -1,103 +0,0 @@ -| -| x_fline.sa 3.3 1/10/91 -| -| fpsp_fline --- FPSP handler for fline exception -| -| First determine if the exception is one of the unimplemented -| floating point instructions. If so, let fpsp_unimp handle it. -| Next, determine if the instruction is an fmovecr with a non-zero -| <ea> field. If so, handle here and return. Otherwise, it -| must be a real F-line exception. -| - -| Copyright (C) Motorola, Inc. 1990 -| All Rights Reserved -| -| For details on the license for this file, please see the -| file, README, in this same directory. - -X_FLINE: |idnt 2,1 | Motorola 040 Floating Point Software Package - - |section 8 - -#include "fpsp.h" - - |xref real_fline - |xref fpsp_unimp - |xref uni_2 - |xref mem_read - |xref fpsp_fmt_error - - .global fpsp_fline -fpsp_fline: -| -| check for unimplemented vector first. Use EXC_VEC-4 because -| the equate is valid only after a 'link a6' has pushed one more -| long onto the stack. -| - cmpw #UNIMP_VEC,EXC_VEC-4(%a7) - beql fpsp_unimp - -| -| fmovecr with non-zero <ea> handling here -| - subl #4,%a7 |4 accounts for 2-word difference -| ;between six word frame (unimp) and -| ;four word frame - link %a6,#-LOCAL_SIZE - fsave -(%a7) - moveml %d0-%d1/%a0-%a1,USER_DA(%a6) - moveal EXC_PC+4(%a6),%a0 |get address of fline instruction - leal L_SCR1(%a6),%a1 |use L_SCR1 as scratch - movel #4,%d0 - addl #4,%a6 |to offset the sub.l #4,a7 above so that -| ;a6 can point correctly to the stack frame -| ;before branching to mem_read - bsrl mem_read - subl #4,%a6 - movel L_SCR1(%a6),%d0 |d0 contains the fline and command word - bfextu %d0{#4:#3},%d1 |extract coprocessor id - cmpib #1,%d1 |check if cpid=1 - bne not_mvcr |exit if not - bfextu %d0{#16:#6},%d1 - cmpib #0x17,%d1 |check if it is an FMOVECR encoding - bne not_mvcr -| ;if an FMOVECR instruction, fix stack -| ;and go to FPSP_UNIMP -fix_stack: - cmpib #VER_40,(%a7) |test for orig unimp frame - bnes ck_rev - subl #UNIMP_40_SIZE-4,%a7 |emulate an orig fsave - moveb #VER_40,(%a7) - moveb #UNIMP_40_SIZE-4,1(%a7) - clrw 2(%a7) - bras fix_con -ck_rev: - cmpib #VER_41,(%a7) |test for rev unimp frame - bnel fpsp_fmt_error |if not $40 or $41, exit with error - subl #UNIMP_41_SIZE-4,%a7 |emulate a rev fsave - moveb #VER_41,(%a7) - moveb #UNIMP_41_SIZE-4,1(%a7) - clrw 2(%a7) -fix_con: - movew EXC_SR+4(%a6),EXC_SR(%a6) |move stacked sr to new position - movel EXC_PC+4(%a6),EXC_PC(%a6) |move stacked pc to new position - fmovel EXC_PC(%a6),%FPIAR |point FPIAR to fline inst - movel #4,%d1 - addl %d1,EXC_PC(%a6) |increment stacked pc value to next inst - movew #0x202c,EXC_VEC(%a6) |reformat vector to unimp - clrl EXC_EA(%a6) |clear the EXC_EA field - movew %d0,CMDREG1B(%a6) |move the lower word into CMDREG1B - clrl E_BYTE(%a6) - bsetb #UFLAG,T_BYTE(%a6) - moveml USER_DA(%a6),%d0-%d1/%a0-%a1 |restore data registers - bral uni_2 - -not_mvcr: - moveml USER_DA(%a6),%d0-%d1/%a0-%a1 |restore data registers - frestore (%a7)+ - unlk %a6 - addl #4,%a7 - bral real_fline - - |end |