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Add Windows x64 ABI support for amd64 target #5

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bc4af41
Add Windows x64 ABI support for amd64 target
itsfuad Dec 25, 2025
446101a
Fix regalloc block-entry remap to avoid register collisions (rem/div
itsfuad Dec 27, 2025
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2 changes: 1 addition & 1 deletion Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ OBJDIR = obj

SRC = main.c util.c parse.c cfg.c mem.c ssa.c alias.c load.c copy.c \
fold.c live.c spill.c rega.c gas.c
AMD64SRC = amd64/targ.c amd64/sysv.c amd64/isel.c amd64/emit.c
AMD64SRC = amd64/targ.c amd64/sysv.c amd64/win64.c amd64/isel.c amd64/emit.c amd64/win64_emit.c
ARM64SRC = arm64/targ.c arm64/abi.c arm64/isel.c arm64/emit.c
SRCALL = $(SRC) $(AMD64SRC) $(ARM64SRC)

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8 changes: 8 additions & 0 deletions amd64/all.h
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Expand Up @@ -63,6 +63,14 @@ bits amd64_sysv_retregs(Ref, int[2]);
bits amd64_sysv_argregs(Ref, int[2]);
void amd64_sysv_abi(Fn *);

/* win64.c (abi) */
extern int amd64_win64_rsave[];
extern int amd64_win64_rclob[];
bits amd64_win64_retregs(Ref, int[2]);
bits amd64_win64_argregs(Ref, int[2]);
void amd64_win64_abi(Fn *);
void amd64_win64_emitfn(Fn *, FILE *);

/* isel.c */
void amd64_isel(Fn *);

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17 changes: 17 additions & 0 deletions amd64/targ.c
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Expand Up @@ -28,3 +28,20 @@ Target T_amd64_sysv = {
.isel = amd64_isel,
.emitfn = amd64_emitfn,
};

Target T_amd64_win64 = {
.gpr0 = RAX,
.ngpr = NGPR,
.fpr0 = XMM0,
.nfpr = NFPR,
.rglob = BIT(RBP) | BIT(RSP),
.nrglob = 2,
.rsave = amd64_win64_rsave,
.nrsave = {NGPS, NFPS},
.retregs = amd64_win64_retregs,
.argregs = amd64_win64_argregs,
.memargs = amd64_memargs,
.abi = amd64_win64_abi,
.isel = amd64_isel,
.emitfn = amd64_win64_emitfn,
};
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