diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2016-01-25 13:20:52 +0100 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2016-03-06 17:03:01 -0500 |
| commit | 5a92dd95c77cee81755f1a441ae0b71e3ae2bcdb (patch) | |
| tree | a7a12a71e2a505ed4a5c20c1356fc2d7cf2cb2f1 /src/setjmp/powerpc | |
| parent | 9543656cc32fda48fc463f332ee20e91eed2b768 (diff) | |
| download | musl-5a92dd95c77cee81755f1a441ae0b71e3ae2bcdb.tar.gz musl-5a92dd95c77cee81755f1a441ae0b71e3ae2bcdb.tar.bz2 musl-5a92dd95c77cee81755f1a441ae0b71e3ae2bcdb.tar.xz musl-5a92dd95c77cee81755f1a441ae0b71e3ae2bcdb.zip | |
add powerpc soft-float support
Some PowerPC CPUs (e.g. Freescale MPC85xx) have a completely different
instruction set for floating point operations (SPE).
Executing regular PowerPC floating point instructions results in
"Illegal instruction" errors.
Make it possible to run these devices in soft-float mode.
Diffstat (limited to 'src/setjmp/powerpc')
| -rw-r--r-- | src/setjmp/powerpc/longjmp.S (renamed from src/setjmp/powerpc/longjmp.s) | 24 | ||||
| -rw-r--r-- | src/setjmp/powerpc/setjmp.S (renamed from src/setjmp/powerpc/setjmp.s) | 14 |
2 files changed, 22 insertions, 16 deletions
diff --git a/src/setjmp/powerpc/longjmp.s b/src/setjmp/powerpc/longjmp.S index bab17511..e598bd05 100644 --- a/src/setjmp/powerpc/longjmp.s +++ b/src/setjmp/powerpc/longjmp.S @@ -4,19 +4,21 @@ .type longjmp,@function _longjmp: longjmp: -# void longjmp(jmp_buf env, int val); -# put val into return register and restore the env saved in setjmp -# if val(r4) is 0, put 1 there. - # 0) move old return address into r0 + /* + * void longjmp(jmp_buf env, int val); + * put val into return register and restore the env saved in setjmp + * if val(r4) is 0, put 1 there. + */ + /* 0) move old return address into r0 */ lwz 0, 0(3) - # 1) put it into link reg + /* 1) put it into link reg */ mtlr 0 - #2 ) restore stack ptr + /* 2 ) restore stack ptr */ lwz 1, 4(3) - #3) restore control reg + /* 3) restore control reg */ lwz 0, 8(3) mtcr 0 - #4) restore r14-r31 + /* 4) restore r14-r31 */ lwz 14, 12(3) lwz 15, 16(3) lwz 16, 20(3) @@ -35,6 +37,7 @@ longjmp: lwz 29, 72(3) lwz 30, 76(3) lwz 31, 80(3) +#ifndef _SOFT_FLOAT lfd 14,88(3) lfd 15,96(3) lfd 16,104(3) @@ -53,10 +56,11 @@ longjmp: lfd 29,208(3) lfd 30,216(3) lfd 31,224(3) - #5) put val into return reg r3 +#endif + /* 5) put val into return reg r3 */ mr 3, 4 - #6) check if return value is 0, make it 1 in that case + /* 6) check if return value is 0, make it 1 in that case */ cmpwi cr7, 4, 0 bne cr7, 1f li 3, 1 diff --git a/src/setjmp/powerpc/setjmp.s b/src/setjmp/powerpc/setjmp.S index 122177f1..cd91a207 100644 --- a/src/setjmp/powerpc/setjmp.s +++ b/src/setjmp/powerpc/setjmp.S @@ -10,15 +10,15 @@ ___setjmp: __setjmp: _setjmp: setjmp: - # 0) store IP int 0, then into the jmpbuf pointed to by r3 (first arg) + /* 0) store IP int 0, then into the jmpbuf pointed to by r3 (first arg) */ mflr 0 stw 0, 0(3) - # 1) store reg1 (SP) + /* 1) store reg1 (SP) */ stw 1, 4(3) - # 2) store cr + /* 2) store cr */ mfcr 0 stw 0, 8(3) - # 3) store r14-31 + /* 3) store r14-31 */ stw 14, 12(3) stw 15, 16(3) stw 16, 20(3) @@ -37,6 +37,7 @@ setjmp: stw 29, 72(3) stw 30, 76(3) stw 31, 80(3) +#ifndef _SOFT_FLOAT stfd 14,88(3) stfd 15,96(3) stfd 16,104(3) @@ -55,7 +56,8 @@ setjmp: stfd 29,208(3) stfd 30,216(3) stfd 31,224(3) - # 4) set return value to 0 +#endif + /* 4) set return value to 0 */ li 3, 0 - # 5) return + /* 5) return */ blr |