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Disable all __sfr32 due to bug SDCC 4070 and add workarounds.

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Generate wrong address for `a4` location.
Both on read from and write to a __sfr32 variable.

Workaround:
Use two __sfr16 instead of one __sfr32.
We still get some optimalizations / better code gen.
This commit is contained in:
René van Dorst
2026-08-30 21:36:03 +02:00
parent fc3c686564
commit b6dcb75130
1 changed files with 7 additions and 2 deletions
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rtl837x_sfr.h
+7 -2
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@@ -5,8 +5,13 @@ __sfr16 __at(0xa2a3) SFR_REG_ADDR_U16;
__sfr __at(0xa2) SFR_REG_ADDRH;
__sfr __at(0xa3) SFR_REG_ADDRL;
__sfr16 __at(0xa6a7) SFR_DATA_U16;
__sfr32 __at(0xa4a5a6a7) SFR_DATA_U32;
__sfr32 __at(0xa7a6a5a4) SFR_DATA_U32LE;
// Disabling until the SDCC bug #4070 is fixed.
// Generate wrong address for `a4` location.
// Both read from and write to `SFR_DATA_U32`.
// __sfr32 __at(0xa4a5a6a7) SFR_DATA_U32;
// __sfr32 __at(0xa7a6a5a4) SFR_DATA_U32LE;
// This is the upper part of the U32 as a workaround for SDCC bug #4070.
__sfr16 __at(0xa4a5) SFR_DATA_U16_UPPER;
__sfr __at(0xa4) SFR_DATA_24;
__sfr __at(0xa5) SFR_DATA_16;
__sfr __at(0xa6) SFR_DATA_8;