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ape/lib9: sync arm getfcr.s implementation

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The arm assembler supports movw to handle
getfcr and setfcr now, no need to hack it
with macros; sync from plan9 libc.
This commit is contained in:
Ori Bernstein 2021-02-08 16:07:09 -08:00
parent 566c3ca2de
commit 2d8adc7b88
1 changed files with 11 additions and 6 deletions
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17
sys/src/ape/lib/9/arm/getfcr.s
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@ -1,16 +1,21 @@
/* for VFP */
#define VMRS(fp, cpu) WORD $(0xeef00a10 | (fp)<<16 | (cpu)<<12) /* FP → arm */
#define VMSR(cpu, fp) WORD $(0xeee00a10 | (fp)<<16 | (cpu)<<12) /* arm → FP */
TEXT setfcr(SB), $4
MOVW R0, FPCR
#define Fpscr 1
TEXT setfcr(SB), $0
VMSR(0, Fpscr)
RET
TEXT getfcr(SB), $4
MOVW FPCR, R0
TEXT getfcr(SB), $0
VMRS(Fpscr, 0)
RET
TEXT getfsr(SB), $0
MOVW FPSR, R0
VMSR(0, Fpscr)
RET
TEXT setfsr(SB), $0
MOVW R0, FPSR
VMRS(Fpscr, 0)
RET