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all: replace ReadRegister with AsmFull inline assembly

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This makes AsmFull more powerful (by supporting return values) and
avoids a compiler builtin.
This commit is contained in:
Ayke van Laethem
2020-04-06 17:06:34 +02:00
committed by Ron Evans
parent 9342e73ae1
commit 6389e45d99
8 changed files with 66 additions and 55 deletions
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src/runtime/arch_arm.go
+1 -1
View File
@@ -15,5 +15,5 @@ func align(ptr uintptr) uintptr {
}
func getCurrentStackPointer() uintptr {
return arm.ReadRegister("sp")
return arm.AsmFull("mov {}, sp", nil)
}
src/runtime/arch_cortexm.go
+1 -1
View File
@@ -17,5 +17,5 @@ func align(ptr uintptr) uintptr {
}
func getCurrentStackPointer() uintptr {
return arm.ReadRegister("sp")
return arm.AsmFull("mov {}, sp", nil)
}
src/runtime/arch_tinygoriscv.go
+1 -1
View File
@@ -15,5 +15,5 @@ func align(ptr uintptr) uintptr {
}
func getCurrentStackPointer() uintptr {
return riscv.ReadRegister("sp")
return riscv.AsmFull("mv {}, sp", nil)
}