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| author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-04-16 13:41:48 +0000 |
|---|---|---|
| committer | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-04-16 13:41:48 +0000 |
| commit | 66b078f6432bd36c0e62c63ce2f1961044e8d777 (patch) | |
| tree | f3a67fe9fdcd88acc62e8e0e4792a6ba7876e28a /apps/codecs/lib/setjmp_mips.S | |
| parent | 493d3a03b3733b2c529d04a168c1915217f5c0e9 (diff) | |
Add setjmp implementation for MIPS targets from newlib
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20713 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/lib/setjmp_mips.S')
| -rw-r--r-- | apps/codecs/lib/setjmp_mips.S | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/apps/codecs/lib/setjmp_mips.S b/apps/codecs/lib/setjmp_mips.S new file mode 100644 index 0000000000..69799a005c --- /dev/null +++ b/apps/codecs/lib/setjmp_mips.S @@ -0,0 +1,98 @@ +/* This is a simple version of setjmp and longjmp for MIPS 32 and 64. + + Ian Lance Taylor, Cygnus Support, 13 May 1993. */ + +#ifdef __mips16 +/* This file contains 32 bit assembly code. */ + .set nomips16 +#endif + +#define GPR_LAYOUT \ + GPR_OFFSET ($16, 0); \ + GPR_OFFSET ($17, 1); \ + GPR_OFFSET ($18, 2); \ + GPR_OFFSET ($19, 3); \ + GPR_OFFSET ($20, 4); \ + GPR_OFFSET ($21, 5); \ + GPR_OFFSET ($22, 6); \ + GPR_OFFSET ($23, 7); \ + GPR_OFFSET ($29, 8); \ + GPR_OFFSET ($30, 9); \ + GPR_OFFSET ($31, 10) + +#define NUM_GPRS_SAVED 11 + +#ifdef __mips_hard_float +#define FPR_LAYOUT \ + FPR_OFFSET ($f20, 0); \ + FPR_OFFSET ($f21, 1); \ + FPR_OFFSET ($f22, 2); \ + FPR_OFFSET ($f23, 3); \ + FPR_OFFSET ($f24, 4); \ + FPR_OFFSET ($f25, 5); \ + FPR_OFFSET ($f26, 6); \ + FPR_OFFSET ($f27, 7); \ + FPR_OFFSET ($f28, 8); \ + FPR_OFFSET ($f29, 9); \ + FPR_OFFSET ($f30, 10); \ + FPR_OFFSET ($f31, 11) +#else +#define FPR_LAYOUT +#endif + +#ifdef __mips64 +#define BYTES_PER_WORD 8 +#define LOAD_GPR ld +#define LOAD_FPR ldc1 +#define STORE_GPR sd +#define STORE_FPR sdc1 +#else +#define BYTES_PER_WORD 4 +#define LOAD_GPR lw +#define LOAD_FPR lwc1 +#define STORE_GPR sw +#define STORE_FPR swc1 +#endif + +#define GPOFF(INDEX) (INDEX * BYTES_PER_WORD) +#define FPOFF(INDEX) ((INDEX + NUM_GPRS_SAVED) * BYTES_PER_WORD) + +/* int setjmp (jmp_buf); */ + .globl setjmp + .ent setjmp +setjmp: + .frame $sp,0,$31 + +#define GPR_OFFSET(REG, INDEX) STORE_GPR REG,GPOFF(INDEX)($4) +#define FPR_OFFSET(REG, INDEX) STORE_FPR REG,FPOFF(INDEX)($4) + GPR_LAYOUT + FPR_LAYOUT +#undef GPR_OFFSET +#undef FPR_OFFSET + + move $2,$0 + j $31 + + .end setjmp + +/* volatile void longjmp (jmp_buf, int); */ + .globl longjmp + .ent longjmp +longjmp: + .frame $sp,0,$31 + +#define GPR_OFFSET(REG, INDEX) LOAD_GPR REG,GPOFF(INDEX)($4) +#define FPR_OFFSET(REG, INDEX) LOAD_FPR REG,FPOFF(INDEX)($4) + GPR_LAYOUT + FPR_LAYOUT +#undef GPR_OFFSET +#undef FPR_OFFSET + + bne $5,$0,1f + li $5,1 +1: + move $2,$5 + j $31 + + .end longjmp + |