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https://github.com/RaySollium99/picodrive.git
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80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
#ifndef __ARM_FEATURES_H__
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#define __ARM_FEATURES_H__
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#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
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|| defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
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|| defined(__ARM_ARCH_7EM__)
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#define HAVE_ARMV7
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#define HAVE_ARMV6
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#define HAVE_ARMV5
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#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
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|| defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \
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|| defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__)
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#define HAVE_ARMV6
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#define HAVE_ARMV5
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#elif defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5E__) \
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|| defined(__ARM_ARCH_5T__) || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__)
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#define HAVE_ARMV5
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#endif
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/* no need for HAVE_NEON - GCC defines __ARM_NEON__ consistently */
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/* global function/external symbol */
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#ifndef __MACH__
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#define ESYM(name) name
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#define FUNCTION(name) \
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.globl name; \
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.type name, %function; \
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name
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#define EXTRA_UNSAVED_REGS
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#else
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#define ESYM(name) _##name
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#define FUNCTION(name) \
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.globl ESYM(name); \
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name: \
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ESYM(name)
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// r7 is preserved, but add it for EABI alignment..
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#define EXTRA_UNSAVED_REGS r7, r9,
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#endif
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// indexed branch (XB) via branch table (BT)
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#ifdef __PIC__
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#define PIC_XB(c,r,s) add##c pc, r, s
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#define PIC_BT(a) b a
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#else
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#define PIC_XB(c,r,s) ldr##c pc, [pc, r, s]
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#define PIC_BT(a) .word a
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#endif
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// load data address (LDR) either via literal pool or via GOT
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#ifdef __PIC__
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// can't use pool loads since ldr= only allows a symbol or a constant expr :-(
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#define PIC_LDR_INIT() \
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.macro pic_ldr r t a; \
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ldr \r, [pc, $.LD\@-.-8]; \
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ldr \t, [pc, $.LD\@-.-4]; \
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.LP\@:add \r, pc; \
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ldr \r, [\r, \t]; \
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add pc, $4; \
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.LD\@:.word _GLOBAL_OFFSET_TABLE_-.LP\@-8; \
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.word \a(GOT); \
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.endm;
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#define PIC_LDR(r,t,a) pic_ldr r, t, a
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#else
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#define PIC_LDR_INIT()
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#define PIC_LDR(r,t,a) ldr r, =a
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#endif
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#endif /* __ARM_FEATURES_H__ */
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