tgsi: add option to dump floats as hex values

This adds support to the parser to accept hex values as floats,
and then adds support to the dumper to allow the user to select
to dump float as 32-bit hex numbers.

[pulled from virgl driver repo]
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/gallium/auxiliary/tgsi/tgsi_dump.c

@@ -29,6 +29,7 @@
 #include "util/u_string.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
+#include "util/u_math.h"
 #include "tgsi_dump.h"
 #include "tgsi_info.h"
 #include "tgsi_iterate.h"
@@ -43,6 +44,8 @@ struct dump_ctx
 {
    struct tgsi_iterate_context iter;
 
+   boolean dump_float_as_hex;
+
    uint instno;
    uint immno;
    int indent;
@@ -83,6 +86,7 @@ dump_enum(
 #define INSTID(I)       ctx->dump_printf( ctx, "% 3u", I )
 #define SID(I)          ctx->dump_printf( ctx, "%d", I )
 #define FLT(F)          ctx->dump_printf( ctx, "%10.4f", F )
+#define HFLT(F)         ctx->dump_printf( ctx, "0x%08x", fui((F)) )
 #define ENM(E,ENUMS)    dump_enum( ctx, E, ENUMS, sizeof( ENUMS ) / sizeof( *ENUMS ) )
 
 const char *
@@ -239,7 +243,10 @@ dump_imm_data(struct tgsi_iterate_context *iter,
    for (i = 0; i < num_tokens; i++) {
       switch (data_type) {
       case TGSI_IMM_FLOAT32:
-         FLT( data[i].Float );
+         if (ctx->dump_float_as_hex)
+            HFLT( data[i].Float );
+         else
+            FLT( data[i].Float );
          break;
       case TGSI_IMM_UINT32:
          UID(data[i].Uint);
@@ -662,6 +669,11 @@ tgsi_dump(
    ctx.dump_printf = dump_ctx_printf;
    ctx.indentation = 0;
 
+   if (flags & TGSI_DUMP_FLOAT_AS_HEX)
+      ctx.dump_float_as_hex = TRUE;
+   else
+      ctx.dump_float_as_hex = FALSE;
+
    tgsi_iterate_shader( tokens, &ctx.iter );
 }
 
@@ -723,6 +735,11 @@ tgsi_dump_str(
    ctx.ptr = str;
    ctx.left = (int)size;
 
+   if (flags & TGSI_DUMP_FLOAT_AS_HEX)
+      ctx.base.dump_float_as_hex = TRUE;
+   else
+      ctx.base.dump_float_as_hex = FALSE;
+
    tgsi_iterate_shader( tokens, &ctx.base.iter );
 }
 

src/gallium/auxiliary/tgsi/tgsi_text.c

@@ -195,8 +195,15 @@ static boolean parse_float( const char **pcur, float *val )
    boolean integral_part = FALSE;
    boolean fractional_part = FALSE;
 
-   *val = (float) atof( cur );
+   if (*cur == '0' && *(cur + 1) == 'x') {
+      union fi fi;
+      fi.ui = strtoul(cur, NULL, 16);
+      *val = fi.f;
+      cur += 10;
+      goto out;
+   }
 
+   *val = (float) atof( cur );
    if (*cur == '-' || *cur == '+')
       cur++;
    if (is_digit( cur )) {
@@ -228,6 +235,8 @@ static boolean parse_float( const char **pcur, float *val )
       else
          return FALSE;
    }
+
+out:
    *pcur = cur;
    return TRUE;
 }