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- /*
- * Copyright (C) 2016-2017 Andes Technology, Inc.
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- /*
- setjmp/longjmp for nds32.
- r0 - r5 are for paramter passing - no need to save
- r6 - r14 are callee saved - needs to save
- r15 is temp register for assembler - no need to save
- r16 - r25 are caller saved - no need to save
- r26 - r27 are temp registers for OS - no need to save
- r28 is fp - need to save
- r29 is gp - need to save
- r30 is ra - need to save
- r31 is sp - need to save
- so we need to save r6 - r14 and r28 - r31
- The jmpbuf looks like this:
- r6
- r7
- r8
- r9
- r10
- r11
- r12
- r13
- r14
- fp
- gp
- ra
- sp
- #ifdef NDS32_ABI_2FP_PLUS
- ($fpcfg.freg)
- (callee-saved FPU regs)
- #endif
- reserved(for 8-byte align if needed)
- */
- #include <sysdep.h>
- #define _SETJMP_H
- #define _ASM
- #include <bits/setjmp.h>
- .section .text
- /* __longjmp (env[0].__jmpbuf, val ?: 1); */
- ENTRY(__longjmp)
- ! restore registers
- lmw.bim $r6, [$r0], $r14, #0xf
- #ifdef NDS32_ABI_2FP_PLUS
- lwi.bi $r20, [$r0], #4 /* Load $fpcfg.freg to $r20. */
- /* Case switch for $r20 as $fpcfg.freg. */
- beqz $r20, .LCFG0 /* Branch if $fpcfg.freg = 0b00. */
- xori $r15, $r20, #0b10
- beqz $r15, .LCFG2 /* Branch if $fpcfg.freg = 0b10. */
- srli $r20, $r20, #0b01
- beqz $r20, .LCFG1 /* Branch if $fpcfg.freg = 0b01. */
- /* Fall-through if $fpcfg.freg = 0b11. */
- .LCFG3:
- fldi.bi $fd31, [$r0], #8
- fldi.bi $fd30, [$r0], #8
- fldi.bi $fd29, [$r0], #8
- fldi.bi $fd28, [$r0], #8
- fldi.bi $fd27, [$r0], #8
- fldi.bi $fd26, [$r0], #8
- fldi.bi $fd25, [$r0], #8
- fldi.bi $fd24, [$r0], #8
- .LCFG2:
- fldi.bi $fd10, [$r0], #8
- fldi.bi $fd9, [$r0], #8
- fldi.bi $fd8, [$r0], #8
- .LCFG1:
- fldi.bi $fd7, [$r0], #8
- fldi.bi $fd6, [$r0], #8
- fldi.bi $fd5, [$r0], #8
- fldi.bi $fd4, [$r0], #8
- .LCFG0:
- fldi.bi $fd3, [$r0], #8
- #endif /* NDS32_ABI_2FP_PLUS */
- ! return error code; make sure error code is not 0
- bnez $r1, .Ldone
- movi $r1, #1
- .Ldone:
- addi $r0, $r1, #0
- ret
- END(__longjmp)
- libc_hidden_def(__longjmp)
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