#ifndef MACHREGS_H
#define MACHREGS_H
-#if defined(__STG_GCC_REGS__) || defined(COMPILING_GHC)
+#if defined(__STG_GCC_REGS__) || defined(COMPILING_NCG)
#include "StgMachDeps.h"
hence they get trashed across ccalls and are caller saves. \tr{%ebx},
\tr{%esi}, \tr{%edi}, \tr{%ebp} are all callee-saves.
-We only steal \tr{%ebx} for base registers. SIGH. SimonM also took
-\tr{%esi} for SpA and \tr{%edi} for SpB. Maybe later.
-
\begin{code}
#if i386_TARGET_ARCH
#define REG_Scav ebx
#define REG_ToHp ebp
#if defined(GCap) || defined(GCgn)
+/* NO: -concurrent croaks on SMevac.lc with this
#define REG_OldGen esi
+*/
#endif /* GCap || GCgn */
#else /* default: MAIN_REG_MAP */
- give back ebp
*/
-/* SpB and R1 are the two heaviest hitters, followed by SpA */
+/* SpB and R1 are the two heaviest hitters, followed by SpA.
+ Hp comes next, followed closely by R2;
+ then RetReg, then R3 and R4.
+ At least based on some static counts.
+ SIGH. WDP 95/09
+*/
#define REG_Base ebx
#define REG_SpB ebp
#if STOLEN_X86_REGS >= 3
# define REG_SpA edi
# define CALLEE_SAVES_SpA
#endif
-/* the mangler will put Hp in %esp!!! */
-#if defined(MANGLING_X86_SP) && MANGLING_X86_SP == 0
-Oops! You should not be here if not mangling %esp!
-#endif
#if STOLEN_X86_REGS >= 5
-# define REG_R2 ecx
-# define CALLER_SAVES_R2
+/*
+# define REG_Hp ecx
+# define CALLER_SAVES_Hp
+# define CALLER_SAVES_SYSTEM
+*/
+/* because we *might* have Hp in a caller-saves register */
#endif
+
#endif /* SCAV_REG_MAP */
#endif /* SCAN_REG_MAP */
#endif /* MARK_REG_MAP */
%************************************************************************
%* *
-\subsubsection[mapping-rs6000]{The IBM RS6000 register mapping}
+\subsubsection[mapping-powerpc]{The PowerPC register mapping}
%* *
%************************************************************************
-\tr{r13}--\tr{r31} are wonderful callee-save registers.
-\tr{r4}--\tr{r8}, \tr{r10}, and \tr{r11} are caller-save registers.
+0 system glue? (caller-save, volatile)
+1 SP (callee-save, non-volatile)
+2 RTOC (callee-save, non-volatile)
+3-10 args/return (caller-save, volatile)
+11,12 system glue? (caller-save, volatile)
+13-31 (callee-save, non-volatile)
-\tr{%fr14}--\tr{%fr31} are callee-save floating-point registers.
+f0 (caller-save, volatile)
+f1-f13 args/return (caller-save, volatile)
+f14-f31 (callee-save, non-volatile)
-I think we can do the Whole Business with callee-save registers only!
+\tr{13}--\tr{31} are wonderful callee-save registers.
+\tr{0}--\tr{12} are caller-save registers.
+
+\tr{%f14}--\tr{%f31} are callee-save floating-point registers.
-UTTERLY UNTESTED
+I think we can do the Whole Business with callee-save registers only!
\begin{code}
-#if rs6000_TARGET_ARCH
-
-#define REG_Base ????
-#define REG_R1
-#define REG_SpA
-#define REG_SpB
-#define REG_Hp
-
-#define REG_Flt1
-#define REG_Flt2
-#define REG_Flt3
-#define REG_Flt4
-#define REG_Dbl1
-#define REG_Dbl2
-
-#endif /* rs6000 */
+#if powerpc_TARGET_ARCH || rs6000_TARGET_ARCH
+
+#define REG(x) __asm__(#x)
+
+#if defined(MARK_REG_MAP)
+#define REG_Mark r22
+#define REG_MStack r23
+#define REG_MRoot r24
+#define REG_BitArray r25
+#define REG_HeapBase r26
+#define REG_HeapLim r27
+#else
+#if defined(SCAN_REG_MAP)
+#define REG_Scan r22
+#define REG_New r23
+#define REG_LinkLim r24
+#else
+#if defined(SCAV_REG_MAP)
+#define REG_Scav r22
+#define REG_ToHp r23
+#if defined(GCap) || defined(GCgn)
+#define REG_OldGen r24
+#endif /* GCap || GCgn */
+#else /* default: MAIN_REG_MAP */
+
+/* callee saves */
+#define CALLEE_SAVES_FltReg1
+#define CALLEE_SAVES_FltReg2
+#define CALLEE_SAVES_FltReg3
+#define CALLEE_SAVES_FltReg4
+#define CALLEE_SAVES_DblReg1
+#define CALLEE_SAVES_DblReg2
+#define CALLEE_SAVES_SpA
+#define CALLEE_SAVES_SuA
+#define CALLEE_SAVES_SpB
+#define CALLEE_SAVES_SuB
+#define CALLEE_SAVES_Hp
+#define CALLEE_SAVES_HpLim
+
+#define CALLEE_SAVES_Ret
+
+#define CALLEE_SAVES_R1
+#define CALLEE_SAVES_R2
+#define CALLEE_SAVES_R3
+#define CALLEE_SAVES_R4
+#define CALLEE_SAVES_R5
+#define CALLEE_SAVES_R6
+#define CALLEE_SAVES_R7
+#define CALLEE_SAVES_R8
+
+#define REG_R1 r14
+#define REG_R2 r15
+#define REG_R3 r16
+#define REG_R4 r17
+#define REG_R5 r18
+#define REG_R6 r19
+#define REG_R7 r20
+#define REG_R8 r21
+
+#define REG_Flt1 fr14
+#define REG_Flt2 fr15
+#define REG_Flt3 fr16
+#define REG_Flt4 fr17
+
+#define REG_Dbl1 fr18
+#define REG_Dbl2 fr19
+
+#define REG_SpA r22
+#define REG_SuA r23
+#define REG_SpB r24
+#define REG_SuB r25
+
+#define REG_Hp r26
+#define REG_HpLim r27
+
+#define REG_Ret r28
+
+#define REG_StkStub r29
+
+#endif /* SCAV_REG_MAP */
+#endif /* SCAN_REG_MAP */
+#endif /* MARK_REG_MAP */
+
+#endif /* powerpc */
\end{code}
%************************************************************************
#else
#if defined(SCAN_REG_MAP)
#define REG_ScanBase g4
+/* NB: *not* defining this (so that everything is done w/ global variables)
+ does *not* work; I suspect that the Sca[nv]RegTable is not being
+ initialised somewhere... WDP 95/10
+*/
#else
#if defined(SCAV_REG_MAP)
#define REG_ScavBase g4
+/* see comment above */
#else /* default: MAIN_REG_MAP */
/* callee saves (nothing) */
-/* caller saves (fp registers and maybe Activity) */
-
-#if defined(DO_SPAT_PROFILING)
-#define CALLER_SAVES_SYSTEM
-#define CALLER_SAVES_Activity
-#endif
+/* caller saves (fp registers) */
#define CALLER_SAVES_USER
#define REG_Dbl1 f6
#define REG_Dbl2 f8
-#if defined(DO_SPAT_PROFILING)
-#define REG_Activity g5
-#endif
-
#define REG_SpA i0
#define REG_SuA i1
#define REG_SpB i2
Concluding multi-slurp protection:
\begin{code}
-#endif /* __STG_GCC_REGS__ || COMPILING_GHC */
+#endif /* __STG_GCC_REGS__ || COMPILING_NCG */
#endif /* MACHREGS_H */
\end{code}
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