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MIPS:improvement FPU support

This commit is contained in:
michael 2020-08-25 11:52:07 +08:00
parent bb20c33f13
commit 3d0bdf4bb6
1 changed files with 7 additions and 3 deletions
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10
libcpu/mips/common/stackframe.h
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@ -22,7 +22,9 @@
#ifdef RT_USING_FPU
/* Ensure CU1 (FPU) is enabled */
MFC0 v1, CP0_STATUS
ori v1, ST0_CU1
lui t1, %hi(ST0_CU1)
addiu t1, t1, %lo(ST0_CU1)
or v1, v1, t1
MTC0 v1, CP0_STATUS
SSNOP
cfc1 v1, fcr31
@ -125,11 +127,13 @@
#ifdef RT_USING_FPU
/* Ensure CU1 (FPU) is enabled */
MFC0 v1, CP0_STATUS
ori v1, ST0_CU1
lui t1, %hi(ST0_CU1)
addiu t1, t1, %lo(ST0_CU1)
or v1, v1, t1
MTC0 v1, CP0_STATUS
SSNOP
LONG_L v1, PT_FPU_FCSR31(sp)
ctc1 v1, fcsr31
ctc1 v1, fcr31
l.d $f0, PT_FPU_R0(sp)
l.d $f2, PT_FPU_R2(sp)
l.d $f4, PT_FPU_R4(sp)