mirror of
https://github.com/AsahiLinux/m1n1
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109 lines
2.1 KiB
Python
109 lines
2.1 KiB
Python
from setup import *
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import asm
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FPCR_FZ = 1 << 24
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ACTLR_DEFAULT = 0xc00
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ACTLR_AFP = 1 << 5
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AFPCR = (3,6,15,2,5)
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AFPCR_DAZ = 1 << 0
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AFPCR_FTZ = 1 << 1
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code_buffer = p.malloc(0x1000)
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data_buffer = p.malloc(0x1000)
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code = asm.ARMAsm("""
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ldr s0, [x0, #0]
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ldr s1, [x0, #4]
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fmul s0, s1, s0
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str s0, [x0, #8]
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ldr s0, [x0, #12]
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ldr s1, [x0, #16]
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fmul s0, s1, s0
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str s0, [x0, #20]
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# to test EL0 access
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# mrs x0, s3_6_c15_c2_5
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ret
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""", code_buffer)
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iface.writemem(code_buffer, code.data)
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p.dc_cvau(code_buffer, code.len)
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p.ic_ivau(code_buffer, code.len)
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def test_denormals():
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data = [
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0x00400000, # a denormal
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0x40000000, # 2
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0,
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0x00800000, # smallest non-denormal
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0x3f000000, # 0.5
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0,
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]
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iface.writemem(data_buffer, struct.pack("<%dI" % len(data), *data))
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p.set_exc_guard(p.GUARD_SKIP)
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ret = p.el0_call(code_buffer, data_buffer | EL0_REGION)
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p.set_exc_guard(p.GUARD_OFF)
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v1 = p.read32(data_buffer + 8)
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v2 = p.read32(data_buffer + 20)
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print(" Input:", end=" ")
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if v1 == 0:
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print("FLUSH ", end=" ")
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elif v1 == 0x00800000:
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print("NORMAL", end=" ")
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else:
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print("0x08x?" % v1, end=" ")
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print("Output:", end=" ")
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if v2 == 0:
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print("FLUSH ", end=" ")
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elif v2 == 0x00400000:
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print("NORMAL", end=" ")
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else:
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print("0x08x?" % v2, end=" ")
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print("r = 0x%x" % ret)
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print("Testing normal mode")
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u.msr(ACTLR_EL1, ACTLR_DEFAULT)
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u.msr(AFPCR, 0)
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u.msr(FPCR, 0)
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print("FPCR.FZ = 0")
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test_denormals()
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u.msr(FPCR, FPCR_FZ)
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print("FPCR.FZ = 1")
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test_denormals()
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print()
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print("Testing Apple mode")
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u.msr(ACTLR_EL1, ACTLR_DEFAULT | ACTLR_AFP)
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u.msr(AFPCR, 0)
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u.msr(FPCR, 0)
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print("FPCR.FZ = 0")
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test_denormals()
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u.msr(FPCR, FPCR_FZ)
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print("FPCR.FZ = 1")
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test_denormals()
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u.msr(AFPCR, AFPCR_DAZ)
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print("AFPCR.<FTZ, DAZ> = 0, 1")
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test_denormals()
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u.msr(AFPCR, AFPCR_FTZ)
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print("AFPCR.<FTZ, DAZ> = 1, 0")
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test_denormals()
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u.msr(AFPCR, AFPCR_FTZ | AFPCR_DAZ)
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print("AFPCR.<FTZ, DAZ> = 1, 1")
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test_denormals()
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