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Minor tweak of output of fpcalc - can be reversed with commented out code

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This commit is contained in:
James E. Stine 2022-02-28 14:10:22 -06:00
parent f54ed94dbc
commit 76a4b80528
3 changed files with 50 additions and 6 deletions
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23
examples/fp/fpcalc/Makefile Normal file
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@ -0,0 +1,23 @@
# Makefile
CC = gcc
CFLAGS = -O3
LIBS = -lm
LFLAGS = -L.
# Link against the riscv-isa-sim version of SoftFloat rather than
# the regular version to get RISC-V NaN behavior
IFLAGS = -I$(RISCV)/riscv-isa-sim/softfloat
LIBS = $(RISCV)/riscv-isa-sim/build/libsoftfloat.a
#IFLAGS = -I../../../addins/SoftFloat-3e/source/include/
#LIBS = ../../../addins/SoftFloat-3e/build/Linux-x86_64-GCC/softfloat.a
SRCS = $(wildcard *.c)
PROGS = $(patsubst %.c,%,$(SRCS))
all: $(PROGS)
%: %.c
$(CC) $(CFLAGS) $(IFLAGS) $(LFLAGS) -o $@ $< $(LIBS)
clean:
rm -f $(PROGS)

22
examples/fp/fpcalc/fpcalc.c
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@ -93,8 +93,13 @@ void printF32(char *msg, float32_t f) {
else sprintf(sci, "%c1.%s x 2^%d", sign, fractstr, exp-127); else sprintf(sci, "%c1.%s x 2^%d", sign, fractstr, exp-127);
//printf ("%s: 0x%08x = %g\n", msg, conv.v, conv.f); //printf ("%s: 0x%08x = %g\n", msg, conv.v, conv.f);
printf ("%s: 0x%08x = %g = %s: Biased Exp %d Fract 0x%lx\n", printf("%s: ", msg);
msg, conv.v, conv.f, sci, exp, fract); printf("0x%04x", (conv.v >> 16));
printf("_");
printf("%04x", (conv.v & 0xFF));
printf(" = %g = %s: Biased Exp %d Fract 0x%lx\n", conv.f, sci, exp, fract);
//printf ("%s: 0x%08x = %g = %s: Biased Exp %d Fract 0x%lx\n",
// msg, conv.v, conv.f, sci, exp, fract);
} }
void printF64(char *msg, float64_t f) { void printF64(char *msg, float64_t f) {
@ -118,8 +123,17 @@ void printF64(char *msg, float64_t f) {
else sprintf(sci, "%c1.%s x 2^%d", sign, fractstr, exp-1023); else sprintf(sci, "%c1.%s x 2^%d", sign, fractstr, exp-1023);
//printf ("%s: 0x%016lx = %lg\n", msg, conv.v, conv.d); //printf ("%s: 0x%016lx = %lg\n", msg, conv.v, conv.d);
printf ("%s: 0x%016lx = %lg = %s: Biased Exp %d Fract 0x%lx\n", printf("%s: ", msg);
msg, conv.v, conv.d, sci, exp, fract); printf("0x%04x", (conv.v >> 48));
printf("_");
printf("%04x", (conv.v >> 32) & 0xFFFF);
printf("_");
printf("%04x", (conv.v >> 16));
printf("_");
printf("%04x", (conv.v & 0xFFFF));
printf(" = %lg = %s: Biased Exp %d Fract 0x%lx\n", conv.d, sci, exp, fract);
//printf ("%s: 0x%016lx = %lg = %s: Biased Exp %d Fract 0x%lx\n",
// msg, conv.v, conv.d, sci, exp, fract);
} }
void printFlags(void) { void printFlags(void) {

11
examples/fp/softfloat_demo/softfloat_demo.c
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@ -12,10 +12,17 @@ typedef union sp {
float f; float f;
} sp; } sp;
void printF32(char *msg, float32_t f) { void printF32 (char *msg, float32_t f) {
sp conv; sp conv;
int i, j;
conv.v = f.v; // use union to convert between hexadecimal and floating-point views conv.v = f.v; // use union to convert between hexadecimal and floating-point views
printf ("%s: 0x%08x = %g\n", msg, conv.v, conv.f); // Print out nicely
printf("%s: ", msg);
printf("0x%04x", (conv.v >> 16));
printf("_");
printf("%04x", (conv.v & 0xFFFF));
printf(" = %g\n", conv.f);
//printf ("%s: 0x%08x = %g\n", msg, conv.v, conv.f);
} }
void printFlags(void) { void printFlags(void) {