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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
| commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
| tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /tools/testing/selftests/powerpc/math/fpu_asm.S | |
| parent | Initial commit. (diff) | |
| download | linux-upstream.tar.xz linux-upstream.zip | |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/powerpc/math/fpu_asm.S')
| -rw-r--r-- | tools/testing/selftests/powerpc/math/fpu_asm.S | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/math/fpu_asm.S b/tools/testing/selftests/powerpc/math/fpu_asm.S new file mode 100644 index 000000000..9dc0c158f --- /dev/null +++ b/tools/testing/selftests/powerpc/math/fpu_asm.S @@ -0,0 +1,131 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright 2015, Cyril Bur, IBM Corp. + */ + +#include "basic_asm.h" +#include "fpu_asm.h" + +FUNC_START(check_fpu) + mr r4,r3 + li r3,1 # assume a bad result + lfd f0,0(r4) + fcmpu cr1,f0,f14 + bne cr1,1f + lfd f0,8(r4) + fcmpu cr1,f0,f15 + bne cr1,1f + lfd f0,16(r4) + fcmpu cr1,f0,f16 + bne cr1,1f + lfd f0,24(r4) + fcmpu cr1,f0,f17 + bne cr1,1f + lfd f0,32(r4) + fcmpu cr1,f0,f18 + bne cr1,1f + lfd f0,40(r4) + fcmpu cr1,f0,f19 + bne cr1,1f + lfd f0,48(r4) + fcmpu cr1,f0,f20 + bne cr1,1f + lfd f0,56(r4) + fcmpu cr1,f0,f21 + bne cr1,1f + lfd f0,64(r4) + fcmpu cr1,f0,f22 + bne cr1,1f + lfd f0,72(r4) + fcmpu cr1,f0,f23 + bne cr1,1f + lfd f0,80(r4) + fcmpu cr1,f0,f24 + bne cr1,1f + lfd f0,88(r4) + fcmpu cr1,f0,f25 + bne cr1,1f + lfd f0,96(r4) + fcmpu cr1,f0,f26 + bne cr1,1f + lfd f0,104(r4) + fcmpu cr1,f0,f27 + bne cr1,1f + lfd f0,112(r4) + fcmpu cr1,f0,f28 + bne cr1,1f + lfd f0,120(r4) + fcmpu cr1,f0,f29 + bne cr1,1f + lfd f0,128(r4) + fcmpu cr1,f0,f30 + bne cr1,1f + lfd f0,136(r4) + fcmpu cr1,f0,f31 + bne cr1,1f + li r3,0 # Success!!! +1: blr + +FUNC_START(test_fpu) + # r3 holds pointer to where to put the result of fork + # r4 holds pointer to the pid + # f14-f31 are non volatiles + PUSH_BASIC_STACK(256) + PUSH_FPU(256) + std r3,STACK_FRAME_PARAM(0)(sp) # Address of darray + std r4,STACK_FRAME_PARAM(1)(sp) # Address of pid + + bl load_fpu + nop + li r0,__NR_fork + sc + + # pass the result of the fork to the caller + ld r9,STACK_FRAME_PARAM(1)(sp) + std r3,0(r9) + + ld r3,STACK_FRAME_PARAM(0)(sp) + bl check_fpu + nop + + POP_FPU(256) + POP_BASIC_STACK(256) + blr +FUNC_END(test_fpu) + +# int preempt_fpu(double *darray, int *threads_running, int *running) +# On starting will (atomically) decrement not_ready as a signal that the FPU +# has been loaded with darray. Will proceed to check the validity of the FPU +# registers while running is not zero. +FUNC_START(preempt_fpu) + PUSH_BASIC_STACK(256) + PUSH_FPU(256) + std r3,STACK_FRAME_PARAM(0)(sp) # double *darray + std r4,STACK_FRAME_PARAM(1)(sp) # int *threads_starting + std r5,STACK_FRAME_PARAM(2)(sp) # int *running + + bl load_fpu + nop + + sync + # Atomic DEC + ld r3,STACK_FRAME_PARAM(1)(sp) +1: lwarx r4,0,r3 + addi r4,r4,-1 + stwcx. r4,0,r3 + bne- 1b + +2: ld r3,STACK_FRAME_PARAM(0)(sp) + bl check_fpu + nop + cmpdi r3,0 + bne 3f + ld r4,STACK_FRAME_PARAM(2)(sp) + ld r5,0(r4) + cmpwi r5,0 + bne 2b + +3: POP_FPU(256) + POP_BASIC_STACK(256) + blr +FUNC_END(preempt_fpu) |