From 92d788a7f86b55d06a1d512b0166981a56ab82eb Mon Sep 17 00:00:00 2001 From: Myles Busig Date: Tue, 8 Oct 2024 00:00:22 -0700 Subject: [PATCH] Add IWRAM section attribute macro to mimic -ffunction-sections See the comment added in this commit for details. Currently unused. Would save some IWRAM usage in the matrix implementation at the cost of readability. If one operation on a matrix size is used, most other operations will likely be used too, so in practice this may not change IWRAM usage much. Only including the matrix sizes that are used in the final binary would likely have a greater impact. FURTHER TESTING REQUIRED. --- include/mtl/target.hpp | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/mtl/target.hpp b/include/mtl/target.hpp index e0bf50a..ea3d4a3 100644 --- a/include/mtl/target.hpp +++ b/include/mtl/target.hpp @@ -27,6 +27,11 @@ #ifdef __GBA__ +// If a section attribute is used, the symbol will be placed in the section +// exactly as specified. This means that when -ffunction-sections is used, functions +// will no longer be placed in separate sections. This macro is used to mimic +// the effect of -ffunction-sections while still placing the function in IWRAM. +#define GBA_IWRAM_FUNC(f) [[gnu::section(".iwram." #f), gnu::long_call]] #define GBA_IWRAM [[gnu::section(".iwram"), gnu::long_call]] #define GBA_EWRAM [[gnu::section(".ewram"), gnu::long_call]] #define GBA_IWRAM_DATA [[gnu::section(".iwram")]]